Backdoor Roth Ira

The Backdoor Roth IRA: Step-by-Step (No Income Limits)

The Roth IRA has income limits. In 2024, direct contributions phase out beginning at $146,000 MAGI for single filers and $230,000 for married filing jointly, and are eliminated entirely at $161,000 and $240,000 respectively. Above these thresholds, the IRS says you cannot contribute to a Roth IRA directly.

It does not say you cannot have money in a Roth IRA.

The backdoor Roth IRA is a two-step legal maneuver that allows high-income earners who exceed the direct contribution limits to still get money into a Roth IRA every year. It has been used by millions of taxpayers for over a decade, has been explicitly recognized by the IRS in its publications, and has survived multiple legislative discussions that threatened to eliminate it. As of 2024, it remains fully operational.

THE TWO-STEP PROCESS

Step 1: Make a non-deductible contribution to a traditional IRA.

Anyone with earned income (wages, salary, self-employment income) can contribute to a traditional IRA regardless of income level—income limits only affect deductibility. For 2024, the limit is $7,000 ($8,000 if age 50 or older). If you exceed the Roth IRA income limits, you contribute this amount to a traditional IRA and take no deduction (because at high income levels, the traditional IRA deduction is also phased out for those covered by a workplace retirement plan).

This creates "basis" in the traditional IRA—money that has already been taxed and will not be taxed again upon distribution.

Step 2: Convert the traditional IRA to a Roth IRA.

Shortly after (typically within a few days to a few weeks), convert the traditional IRA balance to a Roth IRA. Because the contribution was non-deductible, the basis is $7,000 and the taxable amount of the conversion is $0 (or close to it if any investment earnings accrued between contribution and conversion). You report the conversion on Form 8606 but owe no meaningful tax.

The result: $7,000 is now inside a Roth IRA, growing tax-free and available for tax-free qualified withdrawals—without ever having been subject to the Roth IRA income limits.

THE PRO-RATA RULE: THE CRITICAL COMPLICATION

The backdoor Roth works cleanly when you have no other traditional, SEP, or SIMPLE IRA balances. It becomes complicated—and potentially expensive—when you do.

The IRS applies the pro-rata rule when calculating the taxable portion of a Roth conversion. It treats all of your traditional, SEP, and SIMPLE IRAs as a single pool, regardless of which account holds the basis. The taxable percentage of any conversion is:

Taxable percentage = (Total pre-tax IRA balance) / (Total IRA balance including basis)

If you contribute $7,000 non-deductible to a traditional IRA (creating $7,000 of basis) but also have a $63,000 pre-tax rollover IRA from an old 401(k), the IRS sees a total IRA pool of $70,000 with $7,000 (10%) in basis. When you convert $7,000 to Roth, only 10% ($700) is non-taxable. The other 90% ($6,300) is taxable at ordinary income rates—potentially defeating the purpose of the maneuver.

The solution for people with existing pre-tax IRA balances: roll those balances into a current employer's 401(k) or 403(b) plan before executing the backdoor Roth. Most employer plans accept incoming rollovers from traditional IRAs. Once the pre-tax IRA balance is rolled into the 401(k), it is no longer part of the IRA pool for pro-rata calculation. The subsequent backdoor Roth conversion proceeds cleanly.

This rollover must be completed before December 31 of the year in which you execute the conversion—the pro-rata calculation is based on the total IRA balance at year-end.

STEP-BY-STEP EXECUTION

Step 1: Verify you have no pre-tax IRA balances (traditional, SEP, or SIMPLE) that would trigger the pro-rata problem. If you do, arrange a rollover to your employer plan first.

Step 2: Open a traditional IRA at a brokerage if you don't have one. Fidelity, Vanguard, and Schwab are the most common choices for this purpose.

Step 3: Make a non-deductible contribution of $7,000 (or $8,000 if 50+) for the current tax year. You can contribute for a prior tax year up until the tax filing deadline (April 15 of the following year). Do not invest the funds—leave them in cash (money market) within the account to avoid any earnings that would complicate the conversion.

Step 4: Within days to weeks, initiate a Roth IRA conversion at the same brokerage. Convert the full $7,000 (or $8,000) cash balance from the traditional IRA to your Roth IRA. Do not convert in-kind investments that have appreciated—the taxable amount would be higher.

Step 5: File Form 8606 with your tax return for the year of the non-deductible contribution (Part I) and for the year of the conversion (Part II). This form documents your basis, reports the conversion, and calculates the taxable amount. Filing Form 8606 every year is essential—it is the IRS's record of your basis and the document that protects you from paying taxes twice on the same money.

TIMING WITHIN THE YEAR

The contribution and conversion can happen in the same tax year or the contribution can happen in one year and the conversion in the next. From a tax perspective, what matters is:

- In which tax year the contribution was made (determines which year's Form 8606 Part I applies) - In which tax year the conversion occurred (determines which year's Form 8606 Part II applies)

Many people contribute and convert in January of the new year for simplicity—contributing for the prior year (using the April 15 deadline) while also contributing and converting for the current year. This can produce two conversions in one calendar year if done carefully, effectively allowing you to get two years of backdoor Roth contributions processed.

WHAT HAPPENS TO THE MONEY AFTER CONVERSION

Once converted, the $7,000 is in your Roth IRA and should be invested according to your long-term investment strategy—typically low-cost, broadly diversified index funds. It is subject to the Roth IRA five-year rule for earnings (though not for the converted principal itself, as conversions have a separate five-year clock from initial Roth IRA account opening).

Over 20 or 30 years, the compounding difference between $7,000 taxed once and left in a taxable brokerage account versus $7,000 inside a Roth IRA compounding tax-free is substantial. At 7% growth over 25 years, $7,000 grows to approximately $38,000. In a taxable account, gains along the way are subject to annual taxes on dividends and capital gains at sale. In a Roth, the full $38,000 is accessible tax-free.

THE LEGISLATIVE RISK

Proposals to eliminate the backdoor Roth have appeared in congressional bills, most notably in the Build Back Better framework in 2021, which would have prohibited Roth conversions of after-tax IRA contributions for higher-income taxpayers. That provision was not enacted. As of 2024, the backdoor Roth remains fully legal.

Legislative risk is real but has not materialized. People who delay using the backdoor Roth out of concern it may be eliminated are forfeiting current tax-free compounding on a strategy that has survived multiple repeal attempts.

Execute it while it's available. The tax benefit compounds—deferring means permanently forfeiting that year's contribution space, which cannot be made up later.