When your income is too high for a direct Roth, the backdoor Roth IRA opens the door legally. Here is the 2026 playbook.
How does a backdoor Roth IRA work step by step?
Three steps. First, contribute to a traditional IRA as a nondeductible contribution, up to $7,500 in 2026 or $8,600 if you are 50 or older. Second, convert that balance to a Roth IRA, ideally before it grows much. Third, file IRS Form 8606 to record your after-tax basis. Because Roth conversions have no income limit, this two-step path is open to everyone regardless of earnings. If you have no other pre-tax IRA money and convert quickly, the tax bill is minimal because you already paid tax on the contributed dollars.
Why do the pro-rata rule and Form 8606 matter?
The pro-rata rule can turn a tax-free move into a taxable one. If you hold pre-tax money in any traditional, SEP, or SIMPLE IRA on December 31, the IRS taxes your conversion proportionally across all of it, not just the after-tax slice. Many people roll existing pre-tax IRA balances into a 401(k) first to clear the field. Form 8606 is equally critical: it reports your nondeductible basis so you are not taxed twice. File it every year you contribute or convert. Skipping it is a common and expensive error.
Is a backdoor Roth right for your retirement plan?
A backdoor Roth shines if you expect higher future taxes, want tax-free growth, and value that Roth IRAs carry no lifetime required minimum distributions. But conversions raise this year's income, which can lift Medicare IRMAA surcharges and the taxation of Social Security. Timing matters. Converting in lower-income years, often early retirement before RMDs, can reduce the cost. Because these decisions touch taxes and Medicare at once, call 1-800-MEDIGAP at 1-800-633-4427 to connect the retirement and Medicare pieces, then confirm specifics with your tax advisor.