Backdoor Roth IRA: Step-by-Step for High Earners
How to execute a backdoor Roth IRA when your income exceeds the contribution limits — including the pro-rata rule and Form 8606 reporting.
A backdoor Roth IRA means contributing to a traditional IRA with after-tax dollars and then converting it to a Roth, which is legal for any income level but is taxed proportionally if you hold other pre-tax IRA money.
What you'll walk away with
Skim these first — then dig into the details below.
- 1Contribute to a traditional IRA without deducting it, then convert the balance to Roth.
- 2This is the standard route when income exceeds the Roth IRA limits.
- 3The pro-rata rule taxes the conversion if you hold other pre-tax IRA balances.
- 4Every backdoor Roth must be reported on Form 8606 with your tax return.
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Roth IRAs have income limits, but Roth conversions do not. The backdoor Roth exploits that gap: you contribute to a traditional IRA, which anyone can do, then convert it to a Roth, which anyone can also do. The result is a fully funded Roth IRA regardless of income.
Before starting, make sure you have already captured your employer match and understand the basics in our Roth versus traditional IRA guide. Model long-term growth with the 401(k) calculator.
The four steps
The mechanics take about twenty minutes at most brokerages. The important detail is that the traditional IRA contribution must be non-deductible.
- 1
Open a traditional IRA and a Roth IRA at the same brokerage if you do not already have both.
- 2
Contribute up to $7,000 ($8,000 if you are 50 or older) to the traditional IRA and leave it in cash.
- 3
Wait a few days for the funds to settle, then convert the full balance to the Roth IRA.
- 4
Invest the money inside the Roth, and file Form 8606 with your tax return.
The pro-rata rule
This is where backdoor Roths go wrong. The IRS treats all your traditional, SEP, and SIMPLE IRAs as one combined account when calculating the taxable portion of a conversion. You cannot convert only the after-tax dollars.
- The rule looks at all IRA balances as of December 31 of the conversion year.
- The taxable share equals your pre-tax balance divided by your total IRA balance.
- Roth IRAs and 401(k) balances are excluded from this calculation.
- A large rollover IRA from an old job is the most common reason people get taxed.
How to clear the way
If pro-rata is a problem, you usually need to move pre-tax IRA money somewhere the rule cannot see it before December 31.
- 1
Check whether your current employer’s 401(k) accepts incoming rollovers — most do.
- 2
Roll your entire traditional or rollover IRA balance into that 401(k).
- 3
Confirm the IRA balance is $0 as of December 31 of the conversion year.
- 4
Then proceed with the backdoor Roth contribution and conversion.
- 5
If you are self-employed, a solo 401(k) can serve the same purpose.
Reporting and common errors
The tax filing step is where most backdoor Roths get reported incorrectly, sometimes resulting in paying tax on money that should have been tax-free.
- File Form 8606 every year you do this to document the non-deductible basis.
- Do not deduct the traditional IRA contribution on your return.
- Verify your tax software reports the conversion as non-taxable when it should be.
- You can do this for a spouse too, even if they have no earned income, using a spousal IRA.
- If your employer plan allows it, also look at the mega backdoor Roth for much larger amounts.
Disclaimer: This page includes AI-assisted educational content reviewed for general accuracy. It is not personalized financial, tax, or legal advice. Verify numbers with a qualified professional and our editorial standards.
Continue reading
Related guides that deepen the same decision.
Roth vs Traditional IRA: Which Is Better for You?
Choose Roth if your tax rate is likely to be higher later (most younger and mid-income savers); choose traditional if you are in a high bracket now and expect lower income in retirement.
ReadRetirementMega Backdoor Roth: After-Tax 401(k) to Roth Conversion
A mega backdoor Roth lets you contribute after-tax dollars to your 401(k) beyond the normal deferral limit and convert them to Roth, potentially adding $30,000 or more of tax-free savings per year if your plan supports it.
ReadRetirementRoth 401(k) vs Roth IRA: Which Should You Use?
Use the Roth 401(k) for its much higher contribution limit and lack of income restrictions, and use a Roth IRA alongside it for lower fees, wider investment choice, and easier access to your contributions.
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