Backdoor Roth IRA 2026: The Legal Workaround for High Earners

1. Contribute to a Traditional IRA. Contribute $7,000 (or $8,000 if 50+) as a non-deductible contribution. You won't get a tax deduction, that's fine.
2. Don't invest the funds yet. Leave the contribution in cash (money market) until you convert. This avoids gains that would become taxable.
3. Convert to Roth IRA immediately ("same-day" or "back-to-back"). Contact your brokerage (Fidelity, Vanguard, Schwab) and request a conversion of the Traditional IRA to Roth. This is typically done online in minutes.
4. File Form 8606 with your taxes. This is how you tell the IRS the contribution was non-deductible and the conversion was non-taxable (or partially taxable). Do not skip this step.
5. Invest inside the Roth. Now invest the converted funds in your chosen index funds. All future growth is tax-free.

Important: Do this every year by the tax deadline (April 15 of the following year for the prior year's contribution). Many people contribute for Year 1 in January of Year 2 and convert immediately.

The pro-rata rule is the most misunderstood aspect of the backdoor Roth. If you have any pre-tax money in any Traditional IRA (including SEP-IRA or SIMPLE IRA), the IRS requires you to calculate the taxable portion of your conversion proportionally across all IRA money.

Example: You have $63,000 in a pre-tax Traditional IRA and contribute $7,000 non-deductible. Total IRA balance: $70,000. The non-deductible portion is 10% ($7,000 / $70,000). When you convert $7,000, only 10% is tax-free, the other 90% ($6,300) is taxable income.

How to avoid the pro-rata rule: Roll your pre-tax IRA funds into your employer's 401(k) before doing the backdoor Roth. 401(k) money doesn't count in the pro-rata calculation. Many 401(k) plans accept IRA rollovers, call your plan administrator to confirm.

If your 401(k) plan allows after-tax contributions and in-service withdrawals or in-plan conversions, you can do a "mega backdoor Roth", contributing up to $46,500 per year to a Roth IRA or Roth 401(k) above the normal $23,500 pre-tax limit.

The mechanism: the IRS allows total 401(k) contributions (employer + employee + after-tax) up to $70,000 in 2026. If you've contributed the $23,500 pre-tax maximum and your employer adds $0, you can contribute an additional $46,500 in after-tax (non-Roth) 401(k) funds. Then convert those funds to Roth (either within the plan or via in-service distribution to a Roth IRA). Result: $46,500 in additional tax-free retirement savings per year.

Not all plans support this. Check your plan's Summary Plan Description or call your HR department and ask: "Does our 401(k) allow after-tax contributions and in-plan Roth conversions (or in-service distributions)?"