Backdoor Roth IRA: How High Earners Can Still Contribute

Why High Earners Need the Backdoor

Direct Roth IRA contributions are phased out at higher incomes. For 2026: single filers phase out between $150,000–$165,000 MAGI; married filing jointly between $236,000–$246,000. Above the upper limit, you cannot contribute directly to a Roth IRA at all.

But there is no income limit on Roth IRA conversions — only on direct contributions. The backdoor Roth exploits this gap legally and has been acknowledged as a valid strategy by the IRS.

The Two-Step Process

Step 1 — Non-deductible Traditional IRA contribution. Contribute to a Traditional IRA (up to $7,000, or $8,000 if 50+, in 2026). Because your income is too high to deduct this contribution, it is a “non-deductible” contribution — made with after-tax dollars. File Form 8606 to establish the basis.

Step 2 — Convert to Roth. Shortly after funding the Traditional IRA, convert it to a Roth IRA. Because the contribution was non-deductible (after-tax), and there has been little or no growth in the brief period between contribution and conversion, the conversion is essentially tax-free. Any minimal growth between contribution and conversion is taxable income in the conversion year.

Going forward, the converted funds grow tax-free in the Roth IRA and can be withdrawn tax-free in retirement. This is identical to a regular Roth IRA contribution in its end result.

The Pro-Rata Rule — The Critical Trap

The pro-rata rule is where backdoor Roth can go wrong. If you have any pre-tax money in any Traditional, SEP, or SIMPLE IRA, the IRS treats all your IRA money as a blended pool when calculating the taxable portion of a conversion.

Example: You have $50,000 in a pre-tax rollover IRA and you add $7,000 after-tax. Total IRA money: $57,000. After-tax portion: $7,000/$57,000 = 12.3%. When you convert $7,000, only 12.3% is tax-free — the remaining 87.7% ($6,139) is taxable income. The backdoor Roth loses most of its benefit.

Solution: if you have pre-tax IRA balances, roll them into your current employer’s 401(k) before executing the backdoor Roth. Most 401(k) plans accept IRA rollovers. Once the pre-tax IRA is zeroed out, the backdoor is clean.

Mega Backdoor Roth — The $46,500 Version

If your 401(k) allows after-tax contributions and in-service withdrawals or in-plan conversions, you can potentially contribute up to $46,500 after-tax (2026 limit: $70,000 total minus $23,500 pre-tax employee contribution) and convert it to Roth — either inside the plan or by rolling to a Roth IRA. Not all plans support this. Check your plan documents or ask your HR/benefits team.

Context for UK, India, and Canada

UK: No direct equivalent. The UK’s pension system has annual allowances (£60,000 in 2026/27) and lifetime limits, with no income-based contribution phase-outs for pension contributions. ISA contributions (£20,000/year) also have no income limit. High earners can generally contribute fully.

India: NPS and PPF have no income-based phase-outs for contributions. High earners can contribute fully. Tax treatment varies by regime — under the old regime, 80C deductions apply; under the new regime, only NPS employer contributions get tax treatment.

Canada: TFSA and RRSP contributions have no income-based phase-out. RRSP is limited to 18% of prior year’s earned income (max $32,490 in 2026). TFSA contribution room accumulates at $7,000/year for all eligible Canadians regardless of income. No backdoor workaround needed.