Mega Backdoor Roth in Florida: How Orlando High Earners Can Add Up to $47,500 a Year in Tax-Free Retirement Savings (2026 Guide)

Mega Backdoor Roth Florida 2026 guide for Orlando high earners featuring Roger Fishel Financial and a Backdoor Roth IRA graphic.

Table of Contents

If you are a high earner in Orlando, Winter Park, Lake Mary, Lake Nona, Oviedo, Clermont, Winter Garden, or Kissimmee, you have probably run into the same wall: you max out your 401(k), your income is too high to contribute to a Roth IRA, and everything else you save lands in a taxable brokerage account where dividends and capital gains get taxed every single year.

There is a legal, IRS-sanctioned way around that wall. It is called the mega backdoor Roth, and in 2026 it can move as much as $47,500 of additional savings per year into a Roth account where it grows tax free and comes out tax free.

Most people have never heard of it. Most of the ones who have heard of it assume their plan does not allow it, and never bother to check. And a meaningful number of the ones who do try it end up with an unnecessary tax bill because they got a detail wrong.

This guide covers all of it: the exact 2026 numbers, the three plan features you need, the math worked out for real Central Florida income situations, the mistakes that cost people money, and the honest case for when you should skip this strategy entirely.

Key Takeaways

  • The total 2026 limit on everything that can go into your 401(k) or 403(b) from all sources is $72,000 (IRS Section 415(c) annual additions limit). Your own salary deferrals are capped separately at $24,500.
  • The gap between those two numbers is the mega backdoor Roth opportunity. At most it is $47,500 per year, reduced dollar for dollar by any employer match or profit sharing.
  • Catch-up contributions sit on top of the $72,000. Age 50 and older adds $8,000. Ages 60 through 63 add $11,250 under the SECURE 2.0 super catch-up.
  • There are no income limits on this strategy. Roth IRA contributions phase out at $153,000 to $168,000 for single filers and $242,000 to $252,000 for joint filers in 2026. The mega backdoor Roth has no such ceiling.
  • Your employer plan must allow two things: after-tax (non-Roth) contributions and a way to convert them, either an in-plan Roth rollover or in-service withdrawals. If it does not allow both, the strategy is off the table at that employer.
  • New for 2026: if your 2025 FICA wages from your employer exceeded $150,000, your catch-up contributions must now be Roth. This is the first year the SECURE 2.0 mandate is in effect.
  • The Florida angle matters, and not in the way most people assume. Florida has no state income tax, which means Florida residents get no state-level arbitrage from Roth savings. That is an argument for being more deliberate here, not less. More on this below.

What Is a Mega Backdoor Roth, in Plain English?

Your 401(k) has three possible buckets for your own money:

  1. Pre-tax (traditional). You skip taxes now, pay ordinary income tax on every dollar later.
  2. Roth. You pay taxes now, and qualified withdrawals later are completely tax free, including all the growth.
  3. After-tax (non-Roth). This is the forgotten third bucket. You pay taxes now, like Roth, but the growth is taxed as ordinary income when you withdraw it. On its own, it is the worst of the three.

That third bucket is the door. On its own it is unattractive. But if you move that after-tax money into a Roth account quickly, before it generates much growth, you have effectively made a Roth contribution far larger than the IRS would otherwise permit.

That is the whole strategy. Fund the after-tax bucket, convert it to Roth immediately, repeat.

The word “mega” is doing real work here. A regular backdoor Roth moves $7,500 per year (the 2026 IRA limit). A mega backdoor Roth can move six times that.

Why It Is Not a Loophole

People get nervous when a strategy sounds too clever. This one is not a gray area.

The IRS blessed the mechanics directly. Notice 2014-54 confirmed that when you take a distribution containing both after-tax basis and earnings, you can direct the basis to a Roth IRA and the earnings to a traditional IRA, splitting them cleanly. In-plan Roth rollovers are authorized by Internal Revenue Code Section 402A(c)(4). After-tax employee contributions have been permitted in qualified plans for decades.

Congress has looked at closing this door. Proposed legislation in 2021 would have eliminated after-tax conversions for high earners. It did not pass. As of the 2026 tax year the strategy remains fully available, which is exactly why it makes sense to use the window while it is open.

The 2026 Numbers You Need

Here are the figures from IRS Notice 2025-67, which set the 2026 cost-of-living adjustments.

2026 LimitAmount
Employee salary deferral, 401(k)/403(b)/457(b), Section 402(g)$24,500
Catch-up contribution, age 50 and older$8,000
Super catch-up, ages 60 through 63$11,250
Total annual additions from all sources, Section 415(c)$72,000
Total annual additions including age 50 catch-up$80,000
Total annual additions including super catch-up, ages 60 through 63$83,250
Maximum theoretical after-tax contribution$47,500
Traditional and Roth IRA contribution limit$7,500
IRA catch-up, age 50 and older$1,100
Roth IRA income phase-out, single and head of household$153,000 to $168,000
Roth IRA income phase-out, married filing jointly$242,000 to $252,000
Mandatory Roth catch-up threshold, prior-year FICA wagesOver $150,000

Two details in that table trip people up constantly.

First, catch-up contributions do not count toward the $72,000. They sit on top of it. A 61-year-old at a plan with all the right features can push $83,250 into a single 401(k) in one calendar year. That is not a typo.

Second, the $72,000 is per employer plan, not per person. If you have two unrelated employers, the $24,500 deferral limit is yours personally and gets split across both. But the $72,000 annual additions limit applies separately to each unrelated employer’s plan. For consultants, physicians with multiple hospital affiliations, and business owners with a W-2 job plus a side entity, that opens up genuinely large planning room and also creates genuinely large opportunities to get it wrong. Get help with that one.

The Three Plan Features That Determine Everything

Before you calculate a single number, find out whether your plan can do this at all. Three questions, in order.

Question 1: Does the plan accept after-tax, non-Roth employee contributions?

Note the phrasing carefully. You are not asking whether the plan has a Roth 401(k). Most plans do. You are asking about a separate, third contribution source that many plan documents call “after-tax contributions” or “voluntary after-tax contributions.”

Your HR benefits portal often buries this. Look for a third contribution election line beyond “pre-tax %” and “Roth %.” If you only see two, call the recordkeeper directly.

If the answer is no, stop here. There is no workaround. Your options become a taxable brokerage account, a regular backdoor Roth, cash value life insurance, a health savings account, or a deferred compensation plan if you have access to one.

Question 2: Can you convert the after-tax money to Roth, and how fast?

There are two mechanisms:

  • In-plan Roth rollover (also called an in-plan Roth conversion). The money stays inside your 401(k) and moves from the after-tax source to the designated Roth source. Simple, no paperwork with an outside custodian.
  • In-service withdrawal or distribution. You take the after-tax money out of the plan while still employed and roll it directly to a Roth IRA at the custodian of your choice. This gives you far better investment options and consolidates your Roth money, but adds a step.

Some plans allow both. Some allow only one. Some allow neither, which puts you back at Question 1’s dead end.

Question 3: Does the plan offer automatic or daily conversion?

This is the feature nobody asks about and it matters more than the other two.

If your plan offers automatic in-plan Roth conversion, every after-tax dollar converts to Roth immediately upon deposit, before it has time to generate a dime of taxable earnings. This is the ideal setup and an increasing number of large employer plans now offer it.

If conversions are manual and you can only do them quarterly, or once per year, your after-tax money sits in the market generating earnings that become taxable when you convert. In a strong market year, converting once annually on $40,000 of contributions could hand you several thousand dollars of taxable income you did not need to create.

Ask for the exact conversion frequency. Daily or per-payroll is excellent. Monthly is fine. Quarterly is workable. Annual is a real cost. Never is a dealbreaker.

A Note for Central Florida Public Sector and Healthcare Employees

Central Florida’s employment base is unusual, and it matters here.

Governmental 457(b) plans cannot do this. If you work for Orange County, Osceola County, Seminole County, the City of Orlando, or another Florida municipality and your supplemental savings vehicle is a 457(b) deferred compensation plan, the mega backdoor Roth is not available in that plan. Governmental 457(b) plans may offer a designated Roth option, but they cannot accept after-tax non-Roth employee contributions. If you also have access to a 401(a) or 403(b), look there instead.

403(b) plans can do this. If you work in healthcare or higher education in Central Florida, your 403(b) is subject to the same $72,000 Section 415(c) limit and can permit after-tax contributions if the plan document allows. Many large hospital system and university plans do. Ask.

Florida Retirement System participants: your FRS Pension Plan or FRS Investment Plan is your primary retirement benefit, and it does not offer this. Your supplemental savings vehicle is typically a 457(b), which brings you back to the paragraph above. This is a real gap for Florida public employees and one of the reasons a coordinated plan matters more, not less, in that situation.

Large private employers in the Orlando metro, including aerospace and defense contractors, theme park and hospitality parent companies, restaurant groups headquartered here, technology employers, and national consulting firms with Orlando offices, frequently do offer after-tax contributions with in-plan conversion. These plans tend to be administered by major national recordkeepers with well-built platforms. If you work for one of them, the odds are genuinely good. Check.

How to Calculate Your Own Number

Four steps.

Step 1. Start with $72,000, or 100% of your compensation if that is lower.

Step 2. Subtract your salary deferrals, up to $24,500. You should be maxing these out before you even consider this strategy.

Step 3. Subtract every dollar your employer will contribute for the year: match, profit sharing, safe harbor, non-elective, all of it. Include the true-up if your plan has one.

Step 4. What remains is your after-tax contribution room for 2026.

Catch-up contributions do not enter this calculation. They are additional.

Worked Examples for Central Florida Earners

Example 1: The Orlando Aerospace and Defense Engineer

Profile: Age 42, lives in Oviedo, works in the Orlando aerospace corridor. Salary $185,000. Employer matches 6% dollar for dollar. Plan allows after-tax contributions with automatic daily in-plan Roth conversion. Married, spouse earns $95,000, so joint income of $280,000 puts them above the 2026 Roth IRA phase-out entirely.

ComponentAmount
Section 415(c) limit$72,000
Less salary deferral($24,500)
Less employer match at 6%($11,100)
After-tax contribution room$36,400

He was already saving that $36,400 into a joint brokerage account. Redirecting it into the after-tax 401(k) bucket with automatic Roth conversion costs him nothing in current-year taxes, because he was paying tax on that income either way.

What changes is everything that happens afterward. In the brokerage account, dividends and any rebalancing generate taxable events every year for the next twenty-five years. In the Roth, nothing is taxed, ever.

At a 7% assumed annual return over twenty-five years, $36,400 per year compounds to roughly $2.3 million. The difference between that balance being tax free versus partially taxed is not a rounding error. It is one of the largest single planning decisions available to him.

This is a hypothetical illustration. It assumes a constant rate of return, which no actual investment provides, and does not reflect any specific product, fees, or taxes.

Example 2: The Central Florida Physician on a 403(b)

Profile: Age 55, employed by a large Central Florida health system. W-2 compensation $420,000. Employer contributes $16,000 through a combination of match and non-elective contribution. The 403(b) permits after-tax contributions with quarterly in-plan Roth conversion.

ComponentAmount
Section 415(c) limit$72,000
Less salary deferral($24,500)
Less employer contributions($16,000)
After-tax contribution room$31,500
Plus age 50 catch-up (Roth required)$8,000
Total into the plan for 2026$80,000

Two things worth flagging in this case.

First, because her 2025 FICA wages exceeded $150,000, her $8,000 catch-up must be made as a Roth contribution in 2026. This is the SECURE 2.0 mandate taking effect. She loses the deduction she used to get on that piece. She does not lose the contribution.

Second, quarterly conversion means her after-tax dollars sit in the market for up to three months before converting. If she directs after-tax contributions into a stable value or money market option and only moves them to equities after conversion, she keeps her taxable earnings near zero. Most people never think to do this. It is one of the highest-value tweaks in the entire strategy.

Example 3: The Winter Park Business Owner Using a Solo 401(k)

This is the version almost nobody knows about, and for self-employed Central Florida professionals it can be the single best move available.

Profile: Age 61, S-corporation owner in Winter Park, no employees other than himself. W-2 wages from the S-corp of $150,000. Solo 401(k) plan document specifically drafted to permit after-tax contributions and in-plan Roth conversion.

ComponentAmount
Section 415(c) limit$72,000
Less employee salary deferral($24,500)
Less employer profit sharing at 25% of W-2($37,500)
After-tax contribution room$10,000
Plus super catch-up, ages 60 through 63$11,250
Total into the plan for 2026$83,250

Note the super catch-up. At ages 60, 61, 62, and 63 the catch-up jumps from $8,000 to $11,250, and it does not count against the $72,000. This is a four-year window and then it drops back to $8,000 at 64. If you are in that window right now, this is a use-it-or-lose-it opportunity.

Critical caveat for business owners: the vast majority of off-the-shelf solo 401(k) plan documents from discount brokerages do not permit after-tax contributions or in-plan Roth conversions. You need a custom or “open architecture” plan document from a third-party administrator. This typically costs a few hundred to low four figures per year to set up and maintain. For someone contributing tens of thousands annually, that cost is trivial relative to the benefit. For someone contributing $5,000, it is not worth it.

The Florida Question: Does No State Income Tax Change the Math?

Yes, and this is where most national articles on this topic are useless to Florida residents, because they are written for readers in New York, New Jersey, and California.

Here is the honest answer.

Florida residents get less benefit from Roth than high-tax-state residents do

Florida has no personal income tax. It is prohibited by the Florida Constitution. Florida also has no state estate tax and no state tax on retirement income of any kind.

That means a Florida resident’s traditional 401(k) withdrawals in retirement will be taxed at the federal level only. A New Jersey resident’s withdrawals get taxed federally and by the state.

So when you compare “pay tax now on Roth” versus “pay tax later on traditional,” the Florida resident’s future tax rate is inherently lower than an identical earner’s in a high-tax state. That narrows the advantage of Roth.

This is an argument for deliberation, not an argument against the strategy. Here is why the mega backdoor Roth still wins for most people it applies to.

Why it still works in Florida

The comparison for a mega backdoor Roth is not “Roth versus traditional.” You have already maxed your traditional deferrals. That decision is made.

The real comparison is Roth versus a taxable brokerage account. And against a brokerage account, Roth wins in every state, including Florida, because:

  • Brokerage accounts generate taxable dividends and interest annually. Roth accounts do not.
  • Rebalancing a brokerage account triggers capital gains. Rebalancing inside a Roth does not.
  • Roth accounts have no required minimum distributions during your lifetime. Brokerage accounts have no RMDs either, but they also have no tax shelter.
  • Roth withdrawals do not count toward provisional income for Social Security taxation, do not count toward the Medicare IRMAA calculation, and do not push you into a higher federal bracket.

That last bullet is where Roth earns its keep for Florida retirees specifically.

The Central Florida retiree’s real tax problem

Most of my clients in Orlando, Lake Mary, Clermont, and Winter Garden did not come here to escape income tax during their working years. They came here to retire, or they came here mid-career from Michigan, Ohio, New York, New Jersey, or Illinois.

Their tax problem in retirement is not Florida. Florida is not taxing them. Their tax problem is federal, and it shows up in four specific places:

  • Required minimum distributions. RMDs begin at 73 and are calculated on your entire pre-tax balance whether you need the money or not. A large traditional 401(k) becomes a forced-income machine in your seventies.
  • Medicare IRMAA surcharges. Cross an income threshold by a single dollar and your Medicare Part B and Part D premiums jump for the entire year, based on your tax return from two years earlier. Roth withdrawals do not count toward that calculation.
  • Social Security taxation. Up to 85% of your Social Security benefit becomes taxable depending on your provisional income. Roth distributions are excluded from the provisional income formula.
  • The widow’s tax trap. When one spouse dies, the survivor files as single the following year, with roughly half the standard deduction and dramatically compressed brackets, often on nearly the same income. Roth assets are the single best defense against this, and it is the most commonly overlooked risk in retirement planning.

Every dollar you move into Roth during your working years is a dollar that cannot cause any of those four problems later.

The relocation and legacy angle

Two more Florida-specific considerations.

If you might leave Florida. Plenty of Central Florida residents eventually move to be near adult children in the Northeast or Midwest. If there is any real chance of that, the Roth advantage strengthens considerably, because you would be taking traditional withdrawals in a state that taxes them.

If your heirs live in high-tax states. Under the SECURE Act, most non-spouse beneficiaries must empty an inherited retirement account within ten years. If your children inherit a large traditional IRA while they are in their peak earning years and living in New York or California, that ten-year drawdown gets taxed brutally, federally and at the state level. An inherited Roth still must be emptied in ten years, but every dollar comes out tax free.

For Florida residents with children in high-tax states, this is frequently the strongest single argument for aggressive Roth funding, and it has nothing to do with your own tax rate.

Mega Backdoor Roth vs. Backdoor Roth vs. Roth Conversion

These three get confused constantly. They are different tools.

 Mega Backdoor RothBackdoor RothRoth Conversion
Where the money startsAfter-tax 401(k) or 403(b)Non-deductible traditional IRAExisting pre-tax IRA or 401(k)
2026 annual ceilingUp to $47,500$7,500 ($8,600 if 50+)Unlimited
Income limitsNoneNoneNone
Tax cost to executeOnly on earnings before conversion, typically near zeroOnly on earnings, plus pro-rata if you hold pre-tax IRA moneyFull ordinary income tax on the entire converted amount
Requires employer plan featuresYes, both after-tax contributions and conversion capabilityNoNo
Pro-rata rule riskConfined to the after-tax subaccount onlyHigh, if you hold any pre-tax IRA balanceNot applicable
Best suited toHigh earners already maxing deferrals with strong plan featuresAnyone above the Roth IRA income limits with no pre-tax IRA balanceRetirees and pre-retirees in a low-income year before RMDs and Medicare

These are not mutually exclusive. A high earner can do all three in the same calendar year: max the 401(k), execute a mega backdoor Roth for the remaining annual additions room, do a $7,500 backdoor Roth on the side, and convert a slice of an old traditional IRA during a low-income year.

Whether that is a good idea depends entirely on your bracket, your timeline, and your Medicare proximity. That is a planning conversation, not a formula.

The Mistakes That Cost People Money

I have reviewed plenty of self-executed mega backdoor Roth strategies. Here is what actually goes wrong.

Mistake 1: Letting earnings accumulate before conversion

Every day your after-tax money sits unconverted, it may generate earnings. Those earnings are taxable when you convert them. Nothing catastrophic, but it is entirely avoidable.

Fix: use automatic conversion if the plan offers it. If it does not, convert as often as the plan permits, and park after-tax contributions in a money market or stable value fund until conversion, then move to your target allocation inside the Roth source.

Mistake 2: Front-loading and losing your employer match

If your plan does not have a true-up provision, and you contribute your entire $24,500 in the first four months of the year, you will only receive matching contributions during those four months. You forfeit eight months of free money.

Fix: confirm whether your plan has a true-up. If it does not, spread deferrals evenly across all pay periods. This mistake has nothing to do with the mega backdoor Roth specifically, but the people most likely to make it are exactly the people running this strategy.

Mistake 3: Ignoring ACP testing

After-tax employee contributions are subject to the Actual Contribution Percentage test, which is a nondiscrimination test comparing what highly compensated employees contribute against what everyone else contributes.

If not enough rank-and-file employees use the after-tax feature, the plan can fail the test, and the correction is refunding money to highly compensated employees. You could contribute $40,000 in after-tax money in good faith and receive a partial refund the following March.

Fix: ask your plan administrator whether the plan is a safe harbor plan (which helps but does not automatically exempt after-tax contributions from ACP testing) and whether the after-tax feature has failed testing in prior years. Nobody asks this. It is a real risk in smaller plans.

Mistake 4: Using a 60-day indirect rollover

If you do an in-service withdrawal and the check comes to you personally, you have sixty days to get it into a Roth IRA. Miss that window and the earnings portion becomes taxable, plus a 10% early withdrawal penalty if you are under 59½.

Fix: always request a direct rollover, custodian to custodian. Never touch the money. There is no upside to an indirect rollover here, only risk.

Mistake 5: Misunderstanding the two five-year rules

There are two separate five-year clocks and they do different things.

Clock 1: the Roth IRA five-year rule for earnings. Starts January 1 of the tax year of your first-ever Roth IRA contribution or conversion, and it applies to you personally, not per account. Once it is satisfied and you are over 59½, all earnings come out tax free forever. If you do not yet have a Roth IRA, open one with a small contribution today just to start the clock. That is free optionality.

Clock 2: the conversion five-year rule. Each conversion has its own five-year clock for purposes of the 10% early withdrawal penalty on converted amounts, if you are under 59½. Once you are over 59½, this clock stops mattering.

For someone in their forties running a mega backdoor Roth and not planning to touch the money until their sixties, neither clock is a practical constraint. For someone planning an early retirement at 52, both matter enormously.

Mistake 6: Botching the tax reporting

You will receive a Form 1099-R for the conversion. The taxable amount in Box 2a should be only the earnings, not the entire distribution. Recordkeepers get this wrong more often than they should.

If you rolled after-tax money to a Roth IRA outside the plan, you also need Form 8606 filed correctly to track basis.

Fix: review the 1099-R against your own records the moment it arrives, and give your CPA a clear one-page summary of what you did. Do not assume the form is right.

Mistake 7: Doing this before more basic things are handled

The mega backdoor Roth is an advanced move. It should come after, not before:

  • Capturing your full employer match
  • Maxing your HSA if you have a qualifying high deductible health plan, which is the only triple-tax-advantaged account in the code
  • Maxing your $24,500 in salary deferrals
  • Carrying zero high-interest debt
  • Holding an adequate emergency reserve in accessible cash

If any of those are unfinished, fix them first.

Who Should Not Do This

I would rather tell you to skip a strategy than sell you one you do not need. This is not for you if:

  • You need the money in the next five years. Roth money is meant to stay put. A house down payment, a business investment, or a college bill should not be funded from a Roth you just built.
  • You expect a substantially lower tax bracket in retirement. If you are at 32% or 35% now and will genuinely be at 12% or 22% later, pre-tax deferral plus a taxable account may beat Roth. This is less common than people assume, especially once RMDs, Social Security, and a surviving spouse filing single are factored in, but it is real for some households.
  • You are not maxing your regular deferrals yet. Do that first. It is simpler and often more valuable.
  • Your plan’s conversion is annual or manual with long delays. The friction and taxable earnings may not justify the effort at smaller dollar amounts.
  • You are within a year or two of retirement with a large existing Roth balance. At that point your planning problem is withdrawal sequencing and IRMAA management, not accumulation.
  • Your emergency fund is thin or you carry credit card debt. Handle the foundation.

Your Step-by-Step 2026 Action Plan

Step 1. Call your recordkeeper, not HR. Ask these exact questions:

  • Does the plan permit after-tax, non-Roth employee contributions? (Not Roth 401(k). After-tax.)
  • Does the plan permit in-plan Roth rollovers, in-service withdrawals, or both?
  • How frequently can conversions occur? Is automatic conversion available?
  • Does the plan have a true-up on the employer match?
  • Has the after-tax feature failed ACP testing in the past three years?

Step 2. Run your number. $72,000 minus your deferrals minus every employer contribution.

Step 3. Set your elections. Max your $24,500 deferral spread evenly across pay periods. Then set your after-tax election as a percentage of pay that lands you at your target without exceeding it.

Step 4. Turn on automatic conversion. If it exists, this is a single toggle. Do it the same day.

Step 5. Choose the right investments. Inside the after-tax source before conversion, use cash equivalents. After conversion, use your long-term allocation.

Step 6. Monitor mid-year. Bonuses, raises, and commissions change your employer contribution total and can push you over the $72,000. Recheck in July and again in October.

Step 7. Verify the tax forms in January. Review the 1099-R. Confirm Box 2a shows earnings only.

Step 8. Integrate it with the rest of the plan. This is the step that gets skipped, and it is the one that determines whether the money actually improves your retirement. Roth assets are a tax-planning tool. Their value comes from how you use them against RMDs, IRMAA, Social Security taxation, and survivor filing status decades from now.

Frequently Asked Questions

Is the mega backdoor Roth legal in 2026?

Yes. It relies on long-standing provisions of the Internal Revenue Code, and the IRS clarified the mechanics in Notice 2014-54 and Internal Revenue Code Section 402A(c)(4). Legislation proposed in 2021 would have restricted it for high earners but was not enacted. It remains available for the 2026 tax year.

How much can I put into a mega backdoor Roth in 2026?

The maximum theoretical amount is $47,500, which is the $72,000 Section 415(c) annual additions limit minus the $24,500 employee deferral limit. Your actual amount is reduced by every dollar your employer contributes on your behalf.

Does the mega backdoor Roth have income limits?

No. Unlike a direct Roth IRA contribution, which phases out at $153,000 to $168,000 for single filers and $242,000 to $252,000 for joint filers in 2026, there is no income ceiling on this strategy.

Can I do a mega backdoor Roth and a regular backdoor Roth in the same year?

Yes. They use different accounts and different limits. You can also make a separate $7,500 non-deductible IRA contribution and convert it, subject to the IRA pro-rata rule if you hold other pre-tax IRA balances.

What if my Orlando employer’s 401(k) does not allow after-tax contributions?

Then this strategy is unavailable in that plan, with no workaround. Alternatives worth evaluating include a taxable brokerage account managed for tax efficiency, a regular backdoor Roth, an HSA if eligible, a non-qualified deferred compensation plan if offered, or a properly structured cash value life insurance policy. Which of those fits depends on your situation. It is also worth asking HR to add the feature, since plan sponsors do respond to employee demand.

Can I do a mega backdoor Roth in a 457(b) plan?

No. Governmental 457(b) plans cannot accept after-tax non-Roth employee contributions. If you are a Florida public employee whose supplemental plan is a 457(b), check whether you also have access to a 401(a) or 403(b).

Can I do this with a 403(b)?

Yes, if the plan document permits after-tax contributions and a conversion mechanism. 403(b) plans are subject to the same $72,000 Section 415(c) limit. Many large healthcare and university plans in Central Florida do allow it.

Can I do a mega backdoor Roth with a solo 401(k) as a self-employed person in Florida?

Yes, but only with a plan document specifically drafted to permit after-tax contributions and in-plan Roth conversions. Standard discount-brokerage solo 401(k) documents almost never include these features. You will need a third-party administrator.

Do I owe tax when I convert the after-tax money?

You owe tax only on the earnings generated between contribution and conversion. The contributions themselves were already taxed. Convert quickly and that earnings figure is usually near zero.

Does Florida tax the conversion?

No. Florida has no personal income tax, so there is no state-level tax on the conversion, on the growth, or on eventual withdrawals. Your only tax consideration is federal.

Will this increase my Medicare IRMAA surcharge?

Converting after-tax contributions creates taxable income only on the earnings portion, which is typically small enough to be immaterial. Large traditional Roth conversions are the ones that trigger IRMAA problems. The two are frequently confused. If you are within two years of Medicare enrollment, model this before acting, because IRMAA looks back two tax years.

Do Roth 401(k) accounts have required minimum distributions?

Not anymore. SECURE 2.0 eliminated lifetime RMDs from designated Roth accounts in employer plans beginning in 2024, matching the treatment Roth IRAs have always had.

What happens to this money when I die?

A spouse can generally treat an inherited Roth IRA as their own with no RMDs during their lifetime. Most non-spouse beneficiaries must fully distribute the account within ten years under the SECURE Act, but every distribution is tax free provided the five-year rule was satisfied. This is what makes Roth assets the most efficient asset class to leave to children.

I am 61. Is it too late to start?

No, and in fact ages 60 through 63 are the single best window in the entire code because of the $11,250 super catch-up, which is available only during those four years. If your plan has the right features, this is the moment to move.

I am moving to Orlando from a high-tax state. Should I do this before or after I move?

For a mega backdoor Roth, the timing barely matters, because after-tax contributions are made with money that was already state-taxed. For a large traditional Roth conversion, timing matters enormously, and establishing Florida domicile first can save you a substantial amount. Those are two different strategies and they deserve two different conversations.

How This Fits Into a Real Retirement Income Plan

Building tax-free assets is only half the work. The other half is knowing what to do with them.

Roth money is not just a bucket that grows without taxes. It is a control valve. It lets you:

  • Fill up a low tax bracket with traditional withdrawals in a given year, then draw the remainder of your income needs from Roth without pushing into the next bracket
  • Stay below an IRMAA threshold in a year when a one-time expense would otherwise put you over
  • Reduce or eliminate the taxation of Social Security by keeping provisional income low
  • Protect a surviving spouse from the compressed single-filer brackets that create the widow’s tax trap
  • Give heirs the most tax-efficient asset possible under the ten-year distribution rule

None of that happens automatically. It requires knowing, years in advance, what your projected RMDs look like, where your IRMAA thresholds sit, what your Social Security claiming strategy is, and what your household tax picture looks like if one spouse passes first.

That is the work. The mega backdoor Roth is one input into it.

Talk to a Retirement Income Planner in Orlando

I work with pre-retirees and retirees across Orlando, Winter Park, Lake Mary, Lake Nona, Oviedo, Clermont, Winter Garden, Kissimmee, and throughout Central Florida, and with clients nationwide by virtual meeting. Consultations are available in English and Spanish.

If you want to know whether your employer’s plan supports a mega backdoor Roth, how much room you actually have in 2026, and how it should fit alongside your Social Security timing, Medicare enrollment, and withdrawal sequencing, let’s build the number together.

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Important Disclosures

This material is for educational and informational purposes only and does not constitute tax, legal, investment, or accounting advice. Roger Fishel Financial does not provide tax or legal advice. You should consult a qualified tax professional, CPA, or attorney regarding your specific circumstances before implementing any strategy discussed here.

All contribution limits, income thresholds, and tax provisions referenced are for the 2026 tax year and are subject to change by legislation or IRS guidance. Figures are drawn from IRS Notice 2025-67 and related IRS releases. Verify current limits at IRS.gov before acting.

Availability of after-tax contributions and in-plan Roth conversions is determined entirely by your employer’s plan document. Not all plans permit these features. Confirm with your plan administrator or recordkeeper.

All examples are hypothetical and for illustrative purposes only. They do not represent any specific individual or account, do not reflect the deduction of fees or expenses, and assume a constant rate of return, which no actual investment provides. Actual results will vary. Past performance does not guarantee future results.

Insurance and annuity product guarantees are subject to the claims-paying ability of the issuing insurance company.

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