Yes, you can do a backdoor Roth every year, and there is no lifetime cap on how many times you use the strategy. Federal tax law places no limit on how many Roth conversions you can perform in a year or over a lifetime, and the one-rollover-per-year rule that restricts other IRA transfers does not apply to conversions into a Roth IRA.1eCFR. 26 CFR 1.408A-4 – Converting Amounts to Roth IRAs For 2026, each year’s contribution can move up to $7,500 (or $8,600 if you are 50 or older) from a traditional IRA into a Roth, where it can grow and eventually be withdrawn tax-free.2Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
The IRS regulates the front door (contributions), not the hallway (conversions). Once money is inside a traditional IRA, no dollar ceiling or frequency limit applies to moving it into a Roth. The only annual restriction is how much you can put into the traditional IRA in the first place.
Why the Backdoor Exists in the First Place
Direct Roth IRA contributions are cut off at higher incomes. For 2026, the phase-out ranges by filing status are:
- Single or head of household: $153,000 to $168,000 of modified adjusted gross income.
- Married filing jointly: $242,000 to $252,000.
- Married filing separately (living with spouse): $0 to $10,000.
If your income exceeds the top of your range, your direct Roth contribution allowance is zero.2Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 No income limit, however, prevents you from making a nondeductible contribution to a traditional IRA.3Internal Revenue Service. 2025 Publication 590-A – Contributions to Individual Retirement Arrangements That gap is what makes the annual backdoor possible: contribute after-tax dollars to a traditional IRA, then convert them to a Roth.
The Three Steps to Repeat Each Year
Contribute to a Traditional IRA
Open a traditional IRA if you do not already have one and make a nondeductible contribution up to the annual limit ($7,500 under 50, $8,600 at 50 or older for 2026). Park the money in a settlement or money market fund rather than investing it, because any earnings that accrue before you convert will be taxable.
Prior-year contributions are allowed up to the tax-filing deadline. A 2026 contribution can be made as late as April 15, 2027. Filing extensions do not extend this contribution deadline.
Convert to a Roth
Request the conversion from your brokerage. Most platforms handle it digitally and settle within a few business days. No mandatory waiting period exists between contributing and converting, and converting promptly keeps taxable earnings near zero. If a small amount of interest accrues between contribution and conversion, it is taxable as ordinary income in the year of the conversion.
Report on Your Tax Return
Your brokerage will send Form 1099-R the following January showing the distribution from your traditional IRA. You must also file Form 8606 with your return to report the nondeductible contribution and calculate the taxable portion of the conversion.4Internal Revenue Service. About Form 8606, Nondeductible IRAs Doing this annually means filing Form 8606 every year you contribute and convert.
The Pro-Rata Rule Is Where Annual Conversions Go Wrong
If you hold any pre-tax money in traditional, SEP, or SIMPLE IRAs, the IRS will not let you convert only the after-tax dollars. It treats all of those accounts as one combined pool and taxes your conversion proportionally.5Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts
The math: suppose you have $92,500 in pre-tax traditional IRA money and add $7,500 of after-tax dollars for the backdoor. Your combined balance is $100,000, and only 7.5% is after-tax. When you convert $7,500, the IRS treats 7.5% as tax-free and 92.5% as taxable. You would owe tax on roughly $6,938 of the conversion, which largely defeats the purpose.
The backdoor works cleanly only when your combined traditional, SEP, and SIMPLE IRA balances contain no pre-tax money. If you have never contributed to those accounts, or have already rolled everything out, your conversion will be almost entirely tax-free.
Clearing Out Pre-Tax Balances
The common fix is rolling pre-tax IRA money into your current employer’s 401(k) before converting. Once the pre-tax dollars are out of your IRAs, only the after-tax contribution remains and the conversion is essentially tax-free. Not every employer plan accepts incoming rollovers, so check with your plan administrator first.6Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
Timing matters. IRA balances for the pro-rata calculation are measured as of December 31 of the conversion year, so complete the rollover before year-end. If your plan does not accept rollovers and you carry a large pre-tax IRA balance, the backdoor may not make financial sense: you would owe income tax on most of each conversion, and the math rarely justifies the effort.
Form 8606 Every Year
Form 8606 tracks your nondeductible basis in traditional IRAs so the same dollars are not taxed twice. You file it every year you make a nondeductible contribution or convert IRA funds to a Roth.7Internal Revenue Service. 2025 Instructions for Form 8606 – Nondeductible IRAs Each year’s form carries forward the cumulative basis from the prior year and recalculates the taxable portion of any conversion using the pro-rata formula.
Skipping the form is costly. The IRS imposes a $50 penalty for failure to file, but the real damage is losing the paper trail of your after-tax basis. Without it, the IRS can treat your entire conversion as taxable, forcing you to pay tax on money you already paid tax on. Keep copies of every year’s Form 8606 in your permanent records; a gap can make it hard to prove basis decades later when you begin taking withdrawals.
Each Conversion Has Its Own Five-Year Clock
Roth distributions follow ordering rules: contributions come out first, then converted amounts, then earnings. Every conversion carries its own five-year holding period. A $7,500 conversion in 2026 must age five taxable years before that specific batch can be withdrawn without a 10% early withdrawal penalty, assuming you are under 59½.8Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs Once you are 59½ or older, the five-year penalty rule no longer applies to converted amounts, though earnings still need to meet the five-year qualified distribution requirement to come out completely tax-free.
For someone doing a backdoor Roth every year, this means running five-year clocks stacked on top of each other. If you start at age 40 and convert annually, the first year’s dollars become penalty-free at 45, the second year’s at 46, and so on. For long-term retirement savings this is a non-issue; it matters mainly if you plan to tap the account early.
Watch the Combined Contribution Limit
The $7,500 (or $8,600) annual limit applies to your total contributions across all traditional and Roth IRAs combined, not to each account separately. Going over triggers a 6% excise tax on the excess for every year it stays in the account, and the penalty compounds annually.9Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities
The typical mistake with an annual backdoor: contributing to a Roth IRA earlier in the year before realizing your income exceeded the phase-out, then also contributing the full amount to a traditional IRA for the backdoor. The two combined push you over the limit. To avoid the excise tax, withdraw the excess (plus any earnings it generated) before the tax-filing deadline, including extensions.
Inherited IRAs Are Off Limits
The annual backdoor strategy does not extend to inherited IRAs. If you inherited a traditional IRA from someone other than a spouse, you cannot convert those funds into your own Roth. Surviving spouses are the exception: they can elect to treat the inherited IRA as their own and then follow normal conversion rules.6Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions Non-spouse beneficiaries are generally limited to taking distributions from the inherited account within 10 years.