Backdoor Roth IRA: The High-Earner Workaround Explained Step-by-Step

Direct Roth IRA contributions phase out at $146k–$161k single, $230k–$240k joint (2026 MAGI). The backdoor Roth — a fully legal two-step that takes ~10 minutes — lets you contribute the full $7,000 anyway. It's a tax-strategy gift to high earners. Just don't step on the pro-rata landmine.

The two-step

1. Contribute non-deductible to a Traditional IRA. Anyone with earned income can do this, regardless of income. You don't take the deduction.
2. Convert that contribution to a Roth IRA. The conversion of post-tax dollars is a non-event tax-wise — you've already paid tax on the money.

End state: $7,000 in your Roth IRA, growing tax-free for life, exactly as if you'd been able to contribute directly. The IRS has explicitly blessed this. It's not a loophole — it's an intentional feature of how the rules interact.

Step-by-step execution

Step 1: open both accounts at the same broker

Use Fidelity, Schwab, or Vanguard. Open both a Traditional IRA and a Roth IRA at the same broker — makes the conversion a one-click operation.

Step 2: contribute $7,000 to the Traditional IRA

Don't check "deductible." If your provider asks, you're making a non-deductible contribution.

Step 3: wait for the cash to settle (1–2 days), then convert

Convert all the cash from the Traditional IRA to the Roth IRA. Most brokers offer a one-click conversion option in the Traditional IRA interface.

Some practitioners recommend a 1-day wait, others a 1-week wait. The IRS has not specified a required period, and waiting longer just exposes you to tiny gains (which would become taxable on conversion).

Step 4: invest the Roth IRA

After conversion, the Roth IRA holds $7,000 cash. Invest it however you want — most savers use a low-cost broad-market index fund.

Step 5: file IRS Form 8606 with your taxes

This is the required reporting form. It tracks your non-deductible basis to ensure the IRS doesn't tax the conversion as if it were pre-tax money. Tax software (TurboTax, FreeTaxUSA) handles this if you answer the right questions.

The pro-rata rule: the trap that catches everyone

Here's where most backdoor Roths go wrong. The IRS treats all your Traditional, SEP, and SIMPLE IRAs as a single pool for tax purposes during a Roth conversion. If any of those have pre-tax money, the conversion is partly taxable.

The math

Suppose you have:

• Old rollover IRA from a 401(k): $93,000 (pre-tax)
• New non-deductible Traditional IRA: $7,000 (post-tax)
• Total IRA pool: $100,000, of which 7% is post-tax basis

If you convert $7,000 to Roth, the IRS treats the conversion as 7% post-tax (non-taxable) and 93% pre-tax (taxable). You pay income tax on $6,510 — a surprise tax bill of ~$2,000 at a 32% bracket.

The December 31 snapshot

The IRS measures your IRA balance on the last day of the year you do the conversion. If you do the rollover-into-401(k) on December 30, you're fine. If you do it on January 2, you've missed the window. Plan accordingly.

Spousal backdoor Roth

A non-working spouse can do a backdoor Roth based on the working spouse's earned income. Pro-rata is evaluated separately for each spouse — your IRAs are not pooled with theirs. So one spouse could have Traditional IRA balances while the other does a clean backdoor Roth.

Timing across years

Each year's contribution gets its own 5-year clock for tax-free principal withdrawal under 59½. But:

• Once you're 59½ and have had any Roth IRA for 5+ years, the conversion 5-year clocks become moot.
• Open even a tiny Roth IRA in your first earning year (deposit $100) to start the lifetime 5-year clock as early as possible.

Common backdoor Roth mistakes

• Pro-rata oversight. Doing the backdoor while you have a $50k rollover IRA. Surprise tax bill.
• Forgetting Form 8606. Without it, the IRS treats your conversion as pre-tax. You pay tax twice — once now, once at withdrawal.
• Letting cash sit in the Traditional IRA earning interest. Even $0.30 of interest before conversion creates a small taxable amount and Form 8606 complications.
• Doing the conversion in the wrong account. If your broker has a separate "Conversion IRA" or "Rollover IRA," make sure you're converting from the Traditional to the Roth, not creating a new account.

The mega backdoor Roth: similar but bigger

Some 401(k) plans allow after-tax contributions beyond the $23,000 employee deferral limit, with in-plan or in-service Roth conversions. This is the mega backdoor Roth — same concept at much larger scale. Up to ~$46,000 of additional Roth contribution per year if your plan supports it.

Future legislative risk

Multiple proposals over the past several years have attempted to close the backdoor Roth. None has passed as of 2026. If you can do a backdoor Roth, do it now while the rule still permits — there's little downside, and the risk is one-directional (the door could close, but unlikely to open wider).

Process summary

1. Empty Traditional/SEP/SIMPLE IRAs (roll to 401(k) if pre-tax) — or skip backdoor if you can't.
2. January: contribute $7,000 non-deductible to Traditional IRA.
3. Wait 1–7 days for funds to settle.
4. Convert all to Roth IRA in one click.
5. Invest the Roth.
6. File Form 8606 with that year's tax return.
7. Verify on December 31 that your Traditional/SEP/SIMPLE IRA balance is zero.
8. Repeat next January.