Backdoor Roth IRA: How High Earners Access Tax-Free Growth

In 2026, Roth IRA income limits phase out at $150,000 (single) and $236,000 (married). High earners above these limits can still access Roth's tax-free growth through the backdoor Roth — a two-step legal strategy the IRS has explicitly approved.

How the backdoor Roth works in 3 steps

1. Contribute to a traditional IRA (non-deductible): Since you're above Roth income limits, you can't contribute directly. Instead, contribute up to $7,000 ($8,000 if 50+) to a traditional IRA without taking a deduction. Anyone can do this regardless of income.
2. Wait 1–30 days: Some CPAs recommend a brief waiting period to avoid "step transaction" arguments with the IRS, though there's no legal requirement.
3. Convert to Roth IRA: At your broker, convert the traditional IRA balance to Roth. If you contributed $7,000 with no earnings, you pay $0 in taxes on the conversion.

The pro-rata rule: the trap that catches people

If you have any pre-tax money in any traditional IRA, SEP IRA, or SIMPLE IRA, the IRS applies the pro-rata rule. You can't choose to only convert the non-deductible portion — the conversion is taxed proportionally across all IRA money.

Example: You have $63,000 in a rollover IRA (pre-tax) and contribute $7,000 non-deductible. Total IRA = $70,000. The $7,000 conversion is 10% of the total — so 90% is taxable. You owe taxes on $6,300 of the $7,000 conversion. The backdoor doesn't work cleanly if you have existing pre-tax IRAs.

The solution to the pro-rata problem

Roll your pre-tax IRAs into your employer 401(k) or 403(b) (if accepted). Once the pre-tax IRA is gone, the backdoor Roth conversion is 100% clean.

The Mega Backdoor Roth (for 401k plans that allow it)

Some 401(k) plans allow after-tax contributions above the normal $23,500 limit (up to the $70,000 total limit in 2026). If your plan also allows in-plan Roth conversions or in-service withdrawals, you can convert up to $46,500 of after-tax contributions to Roth annually. This is the mega backdoor — and it's only available in specific employer plans. Ask your HR department or plan administrator if your plan supports it.