Backdoor Roth IRA:
How High Earners Can Still
Build Tax-Free Retirement Savings
If your income is too high to contribute to a Roth IRA directly, a two-step strategy — often called a “backdoor” Roth IRA — may still let you get money into one. Here is how it works, where it can get complicated, and how a 401(k) “mega backdoor” version can go even further.
This page addresses federal tax rules only; state income tax treatment of Roth conversions varies by state and is not addressed here. This content is for general educational purposes only and does not constitute individualized investment, tax, or legal advice.
2026 Key Numbers
Overview
What Is a Backdoor Roth IRA — and Who Is It For?
A backdoor Roth IRA is not a special account. It is a two-step strategy that lets someone whose income is too high to contribute to a Roth IRA directly still get money into one, by using the gap between how IRA contributions and IRA conversions are treated under the tax code.
The Loophole
No Income Limit
on Roth conversions
Roth IRA contributions are subject to income limits, but converting an existing traditional IRA to a Roth IRA has had no income restriction at all since 2010 — a gap the backdoor Roth strategy is built around.
Who Benefits Most
High Earners
above the direct contribution limits
The strategy is designed for individuals and couples whose modified adjusted gross income (MAGI) exceeds the 2026 Roth IRA phase-out ranges but who still want tax-free growth and tax-free qualified withdrawals in retirement.
The Trade-Off
It’s Not Automatic
existing IRA balances complicate it
The strategy works cleanly for someone with no other traditional, SEP, or SIMPLE IRA balances. For someone who already holds pre-tax IRA money, a rule called the pro-rata rule can make much of the conversion taxable.
Contribution limits and conversion rules are two different things.
The annual limit on how much you can contribute directly to an IRA is governed by one set of rules. Converting money already sitting in an IRA to a Roth IRA is governed by a separate rule that Congress changed in 2010 to remove any income cap. The backdoor Roth strategy exists in the space between those two rules: contribute where you’re allowed to, then convert where there’s no income limit at all.
How It Works
Setting Up a Backdoor Roth IRA: Four Steps
The mechanics are simple in concept — contribute to a traditional IRA, then convert it to a Roth IRA. Getting the details of each step right matters for tax reporting and for keeping any amount you owe in tax as small as possible.
Contribute to a Traditional IRA
Make a nondeductible contribution to a traditional IRA — up to $7,500 for 2026, or $8,600 if you’re 50 or older. Because your income is too high to deduct it, this is made with after-tax dollars.
File IRS Form 8606
Report the nondeductible contribution on Form 8606 for the year it was made. This form establishes your “basis” — the after-tax dollars the IRS already knows should not be taxed again.
Convert to a Roth IRA
Move the funds from the traditional IRA to a Roth IRA. Many people convert quickly — sometimes within days — so there is little time for the money to grow and create a taxable gain before conversion.
Report the Conversion
File Form 8606 again for the conversion, reporting any taxable portion as ordinary income. If you had no other pre-tax IRA balances, this portion is typically at or near zero.
2026 IRA Contribution Limit
$7,500
Per person, across all traditional and Roth IRAs combined
Catch-Up (Age 50+)
$1,100
Additional amount for those 50 and older — $8,600 total
Roth MAGI Phase-Out — Single/HOH
$153,000–$168,000
Direct Roth contributions phase out across this range
Roth MAGI Phase-Out — Married Filing Jointly
$242,000–$252,000
Direct Roth contributions phase out across this range
Roth MAGI Phase-Out — Married Filing Separately
$0–$10,000
Not adjusted for inflation; affects most separate filers
Income Limit on Conversions
None
Conversions have had no income restriction since 2010
The Pro-Rata Rule
Why an Existing IRA Balance Changes Everything
The backdoor Roth strategy works cleanly when the only money in your traditional IRAs is the after-tax contribution you just made. If you already hold other pre-tax IRA money, the IRS requires you to treat every traditional, SEP, and SIMPLE IRA you own as one combined pool — and that pool determines how much of any conversion is taxable.
| IRA Component | Amount |
|---|---|
| 2026 Nondeductible Contribution | $7,500 |
| Other Pre-Tax IRA Balances (12/31) | $0 |
| Total Year-End IRA Balance | $7,500 |
| Nontaxable Basis (Form 8606) | 100% |
| Taxable Portion of Conversion | 0% ($0) |
| IRA Component | Amount |
|---|---|
| 2026 Nondeductible Contribution | $7,500 |
| Other Pre-Tax IRA Balances (12/31) | $92,500 |
| Total Year-End IRA Balance | $100,000 |
| Nontaxable Basis (Form 8606) | 7.5% |
| Taxable Portion of Conversion | 92.5% ($6,938) |
Steps That Help It Go Smoothly
- File Form 8606 every year you make a nondeductible contribution or a conversion — missing it can lead to double taxation later
- Convert promptly after contributing to minimize any taxable earnings
- Confirm the year-end balance of every traditional, SEP, and SIMPLE IRA you own before converting
- Ask your 401(k) plan administrator whether the plan accepts incoming IRA rollovers, if reducing pro-rata exposure is part of your plan
Common Mistakes
- Forgetting that SEP and SIMPLE IRA balances count toward the pro-rata calculation, not just traditional IRAs
- Assuming a conversion can be reversed if account values decline — recharacterization of conversions is no longer permitted
- Letting converted funds sit and grow substantially before converting, creating an unplanned taxable gain
- Overlooking a spouse’s separate IRA balances — each spouse’s pro-rata calculation is based on their own IRAs, not a household total
- Forgetting that each Roth conversion starts its own five-year clock — separate from the five-year clock for tax-free earnings — for avoiding the 10% early-withdrawal penalty on any taxable portion of that conversion
Mega Backdoor Roth
Going Further Through Your 401(k)
If your employer’s 401(k) plan allows it, a “mega backdoor Roth” can move far more into Roth savings each year than an IRA alone ever could.
$72,000
2026 Combined Contribution Ceiling
The IRC Section 415(c) limit on total annual additions to a defined contribution plan — employee deferrals, employer contributions, and after-tax contributions combined.
$24,500
Standard Employee Deferral Limit
The normal 2026 limit on pre-tax or Roth elective deferrals to a 401(k) — the starting point before any after-tax “mega backdoor” contributions.
$47,500
Potential After-Tax Room (Example)
In a plan with no employer match, the gap between the $72,000 combined ceiling and the $24,500 deferral limit — the space a mega backdoor Roth strategy can potentially fill. An employer match or profit-sharing contribution reduces this figure dollar for dollar.
2
Plan Features Required
Your 401(k) plan must allow after-tax (non-Roth) contributions, and it must allow either in-service withdrawals or in-plan conversions of those dollars to Roth. Not every plan offers both — check your Summary Plan Description or ask your plan administrator.
Catch-up contributions for those 50 and older ($8,000 in 2026, or $11,250 for those age 60–63) are elective deferrals, not after-tax contributions — they do not add to the after-tax room calculated above, though they do increase how much you can defer in total.
Check whether this might apply to you →An Interactive Starting Point
Check Your Situation
Answer three quick questions to get a general sense of whether a backdoor or mega backdoor Roth strategy is likely relevant to you. This is educational only — it does not calculate taxes, does not consider your complete financial picture, and does not replace a conversation with your advisor.
1. Compared to the 2026 Roth IRA phase-out range for your filing status, where does your household MAGI generally fall?
2. Do you (or your spouse, if filing jointly) currently hold any Traditional, SEP, or SIMPLE IRA balances?
3. Does your employer’s 401(k) plan allow after-tax contributions with in-service withdrawals or in-plan Roth conversions?
General Considerations
This is general educational information, not a recommendation or personalized advice. Talk with a Fairvoy advisor to review your specific accounts and tax situation.
This tool provides general educational information only, based on the 2026 figures described on this page. It does not calculate your taxes, does not access or store any information you enter, and does not consider your complete financial picture. It is not individualized investment, tax, or legal advice.
Frequently Asked Questions
Common Questions Answered
The backdoor Roth strategy raises a lot of detailed questions. These are some of the ones we hear most often from clients and prospective clients.