How to Report a Backdoor Roth Conversion in TurboTax

Where to enter your backdoor Roth in TurboTax

TurboTax walks you through a backdoor Roth conversion using the IRA section of the software, not a separate backdoor tool. You will report two transactions: the non-deductible traditional IRA contribution and the conversion to Roth. The software prompts you for both when you answer questions about IRA activity during the year.

Start in the Federal Taxes section and look for "IRA Contributions" or "Retirement Accounts." TurboTax will ask whether you made any IRA contributions and whether you converted any IRAs. Answer yes to both. The software then guides you through entering the contribution amount, the conversion amount, and the date of each transaction.

If you are using TurboTax Online (the web version), the interview-style questions appear as you move through the retirement section. If you are using TurboTax Desktop, you can also jump directly to the IRA section by searching "IRA" in the search bar at the top of the screen.

Key Takeaways

• Report the non-deductible contribution and the conversion separately in the IRA section, not as two unrelated transactions.
• You will need Form 8606 to be generated automatically by TurboTax once you enter the contribution and conversion details.
• The pro-rata rule applies if you have other pre-tax IRA balances, and TurboTax will ask about those balances to calculate the taxable portion correctly.
• Timing matters: the contribution and conversion must happen in the same calendar year for TurboTax to process them correctly as a backdoor sequence.

Entering the non-deductible contribution

When TurboTax asks about IRA contributions, select the option for a non-deductible contribution. You will enter the amount (usually the annual limit, which varies by year) and the date you made the contribution to your traditional IRA. TurboTax will mark this contribution as non-deductible, which means it will not reduce your taxable income.

The software will also ask whether you have a workplace retirement plan like a 401(k) or 403(b). This question determines whether you are subject to income limits that would prevent you from deducting a traditional IRA contribution anyway. For a backdoor Roth, you are intentionally making a non-deductible contribution, so the answer to this question does not change your reporting—but TurboTax needs the information to calculate other parts of your return correctly.

Entering the conversion amount

After you enter the contribution, TurboTax will ask whether you converted any IRAs to Roth during the year. Answer yes and enter the amount you converted. This should be the same amount as your non-deductible contribution if you converted the funds immediately after depositing them (which is the standard backdoor approach).

TurboTax will ask for the date of the conversion. Use the date you actually moved the money from your traditional IRA to your Roth IRA, not the contribution date. If you converted on the same day you contributed, enter that same date. The software uses this date to determine which tax year the conversion belongs to.

The software will also ask about any earnings on the contribution between the deposit and the conversion. If you converted within a few days, this is usually zero or a few dollars. If there were earnings, enter that amount separately—it will be taxable in the year of conversion, while the non-deductible contribution portion will not be.

How TurboTax handles the pro-rata rule

If you have other traditional IRAs, SEP IRAs, or SIMPLE IRAs with pre-tax balances, TurboTax will ask about those balances. This is where the pro-rata rule comes in. The IRS treats all your IRAs as one pool for tax purposes, so if you have $50,000 in pre-tax IRAs and convert $7,000, part of that conversion is taxable based on the ratio of pre-tax money to total IRA money.

TurboTax will calculate this ratio automatically once you enter your total IRA balances. You will need the December 31 balance from the previous year and the December 31 balance from the current year for each IRA account. Your IRA custodian (Fidelity, Vanguard, Schwab, or your bank) sends you a year-end statement showing these balances, or you can log into your account online to find them.

Enter the total value of all your pre-tax IRA accounts as of December 31 of the year you are converting. TurboTax will use this to calculate how much of your conversion is taxable. The non-deductible contribution portion remains non-taxable, but the pro-rata calculation determines how much of the converted amount comes from pre-tax versus after-tax money.

Form 8606 and what it means

TurboTax automatically generates Form 8606 (Nondeductible IRAs) once you enter your backdoor Roth information. This form is the IRS record of your non-deductible contribution and conversion. You do not fill it out manually—TurboTax creates it based on your answers—but you should review it before you file to make sure the amounts are correct.

Form 8606 has three parts. Part I records your non-deductible contribution. Part II records your conversion. Part III calculates the taxable portion of your conversion using the pro-rata rule. If you have no other pre-tax IRAs, Part III will show that your entire conversion is non-taxable (since you contributed after-tax money and converted only that after-tax money).

Keep a copy of Form 8606 with your tax records. The IRS uses this form to track your basis in your IRAs over time. If you do multiple backdoor Roths in future years, each one generates a new Form 8606, and the IRS matches them to your prior-year forms to ensure you are not paying tax twice on the same money.

Common mistakes to avoid

The most common error is entering the contribution and conversion as separate, unrelated transactions instead of as a sequence. TurboTax is designed to connect them, so make sure you answer yes to both the contribution question and the conversion question in the same interview. If you skip one or answer no, the software will not generate Form 8606 correctly.

Another mistake is forgetting to account for other IRA balances. If you have a rollover IRA, an old 401(k) that you rolled into an IRA, or any other pre-tax IRA account, you must enter that balance when TurboTax asks. Omitting it will cause TurboTax to calculate the pro-rata rule incorrectly and may result in underreporting taxable income.

A third error is using the wrong date. The contribution date and conversion date should be in the same calendar year. If you contributed in December and converted in January of the next year, TurboTax will split the transaction across two tax years, which complicates your return. The standard backdoor approach is to contribute and convert in the same month or week to avoid this.

Finally, do not assume that a zero tax bill on the conversion means you reported it correctly. If you have pre-tax IRA balances, part of your conversion should be taxable. If TurboTax shows zero tax on the conversion and you have other IRAs, double-check that you entered those IRA balances. A zero tax result with pre-tax IRAs present is usually a sign that something was missed.

Where to find your IRA statements and conversion records

You will need three pieces of paper to report your backdoor Roth: your IRA custodian's statement showing the contribution, your custodian's statement showing the conversion, and your year-end IRA balance statement. Most custodians send these by mail or email in January, but you can also download them from your online account.

Log into your IRA custodian's website (Fidelity, Vanguard, Schwab, Charles Schwab, E-Trade, or your bank's investment platform) and look for "Statements" or "Documents." You should see a statement for the month you made the contribution and a separate statement for the month you converted. These statements show the transaction date, the amount, and the account numbers involved.

For the year-end balance, look for your December statement or a year-end summary. If you have multiple IRA accounts at different custodians, you will need the December 31 balance from each one. Write these down or screenshot them before you open TurboTax, so you have them ready when the software asks.

Frequently Asked Questions

What if I converted my backdoor Roth in January but made the contribution in December?

TurboTax will split the transaction across two tax years. Report the contribution on your prior year's return and the conversion on your current year's return. This is technically allowed, but it complicates your filing. The standard approach is to contribute and convert in the same calendar year to keep everything on one return.

Do I need to report a backdoor Roth if the amount was very small?

Yes. The IRS requires Form 8606 for any non-deductible IRA contribution, regardless of amount. TurboTax will generate it automatically once you enter the contribution and conversion details. Failing to file Form 8606 can result in the IRS treating your conversion as taxable, even though you paid tax on the contribution already.

What happens if I have earnings between the contribution and conversion?

TurboTax will ask you to enter the earnings separately. The earnings are taxable in the year of conversion, while the non-deductible contribution portion is not. If the earnings are small (a few dollars), you can usually find them on your IRA statement as the difference between the contribution amount and the conversion amount.

Can I report a backdoor Roth if I have a SEP IRA or Solo 401(k)?

Yes, but the pro-rata rule applies to SEP IRAs. If you have a SEP IRA with a pre-tax balance, TurboTax will include that balance in the pro-rata calculation. Solo 401(k)s are not subject to the pro-rata rule, so they do not affect your backdoor Roth reporting. Enter your SEP IRA balance when TurboTax asks about other IRA accounts.

What if TurboTax does not ask me about IRA conversions?

Search for "IRA" in the search bar at the top of the screen (in TurboTax Desktop) or look for "Retirement Accounts" in the Federal Taxes section (in TurboTax Online). You can also navigate directly to the IRA section by clicking on "Deductions & Credits" and then "Retirement Savings Contributions." If you still do not see the conversion question, you may be using a version of TurboTax that does not include that feature—consider upgrading or contacting TurboTax support.