The Income Limit Most High Earners Hit
The 2025 Roth IRA phase-out begins at $150,000 (single) and $236,000 (married filing jointly) per IRS Publication 590-A. Above the limit, direct contributions drop to zero. Most people stop here, assuming tax-free compounding is permanently off the table. It is not.
The Two-Step Backdoor Process
Step 1: Contribute up to $7,000 ($8,000 age 50+) to a Traditional IRA as a non-deductible contribution — do not claim a tax deduction. Step 2: Convert the entire Traditional IRA balance to a Roth IRA, ideally within days to avoid taxable gains accumulating in the interim. File Form 8606 annually to document your non-deductible basis. Congress and the IRS explicitly blessed this approach in 2010 when they removed the $100K MAGI conversion cap.
The Pro-Rata Trap
This is where most high earners get burned. If you hold any pre-tax money in any Traditional, SEP, or SIMPLE IRA, the IRS applies the pro-rata rule across ALL your IRA balances. Example: $93,000 rollover IRA + $7,000 non-deductible contribution = $100,000 total. Only 7% ($490) of a $7,000 conversion is tax-free. The remaining $6,510 is taxable. The fix: roll pre-tax IRA balances into your employer 401(k) before executing the backdoor. Most large-employer plans accept IRA rollovers.
The Mega Backdoor: $46,500 More Per Year
If your 401(k) allows after-tax contributions and in-plan Roth conversions, the 2025 Section 415(c) total limit is $70,000. After-tax capacity: $70,000 minus $23,500 pre-tax minus employer match. This is the mega backdoor Roth — used extensively at FAANG companies and high-compensation firms. Ask HR: 'Does this plan allow after-tax contributions and in-plan Roth conversions?' That one question can unlock $46,500 in annual Roth contributions.
WealthWise OS models backdoor Roth contribution scenarios and their long-term impact on retirement projections. Explore at wealthwiseos.com.