How to Use This Calculator
- 1
Enter the Rollover Amount
Input the total amount being rolled over from a traditional IRA or 401(k) to a Roth IRA.
- 2
Enter Your Current Tax Rate
Input your current marginal federal income tax rate as a percentage.
- 3
Enter the Expected Roth IRA Growth Rate
Input the anticipated annual rate of return on your Roth IRA investments.
- 4
Review Tax Impact and Future Value
View the immediate tax owed on the conversion and the projected value of the rollover after 10 years of tax-free growth.
Example Calculation
A worker in the 22% tax bracket considers converting $30,000 from a traditional IRA to a Roth IRA.
Rollover Amount
$30,000
Current Tax Rate
22%
Expected Roth IRA Growth Rate
6%
Results
Tax impact of $6,600 owed on the conversion. The $30,000 grows tax-free to approximately $53,726 over 10 years at a 6% annual return.
Tips
Convert in Low-Income Years
If you have a year with reduced income such as between jobs or early retirement, your tax bracket may be lower, reducing the conversion tax bill.
Pay the Tax from Non-Retirement Funds
Paying the conversion tax from a separate savings or brokerage account lets the full rollover amount compound tax-free inside the Roth IRA.
Consider Partial Conversions
You do not have to convert the entire balance at once. Spreading the conversion over multiple years can keep you in a lower tax bracket each year.
Factor in State Taxes
This calculator uses your federal rate. Add your state income tax rate for a more accurate total tax estimate, as most states also tax Roth conversions.
Estimating the Tax Impact of a Roth IRA Rollover
The IRA Rollover Tax Impact Calculator helps individuals assess the immediate tax cost and long-term benefits of converting a traditional IRA or 401(k) into a Roth IRA. By projecting future tax-free growth, the tool provides clarity on your potential tax burden and the estimated break-even point for the conversion.
For example, converting $30,000 at a 22% marginal tax rate results in an immediate tax liability of $6,600, but the Roth grows to $96,214 tax-free over 20 years — a $21,167 advantage over the traditional IRA's after-tax value of $75,047.
Why Roth Conversions are a Key Retirement Strategy
Roth conversions are a powerful tool in retirement planning, particularly for individuals who anticipate being in a higher tax bracket during retirement than they are today. By paying taxes on the converted amount now, all future qualified withdrawals, including decades of investment growth, become entirely tax-free.
This offers a valuable hedge against uncertain future tax rates and provides greater flexibility in managing retirement income, making it a strategic move for long-term financial security.
Understanding the Tax Calculation for a Roth Conversion
The primary calculation for a Roth conversion involves determining the immediate tax liability.
This is straightforward: the amount converted from a pre-tax account (like a traditional IRA) to a Roth IRA is treated as taxable income in the year of conversion.
Tax Due = Rollover Amount × Current Tax Rate
Roth Future Value = Rollover Amount × (1 + Growth Rate)^Years
Traditional After-Tax = Roth Future Value × (1 - Tax Rate)
Roth Advantage = Roth Future Value - Traditional After-Tax
For instance, if you convert $30,000 and your current marginal federal income tax rate is 22%, the tax due would be $30,000 × 0.22 = $6,600.
The calculator then projects the future value of this Roth balance, assuming tax-free growth, and compares it to what a traditional IRA balance would be after taxes on withdrawal.
Calculating the Tax Cost of a Roth Conversion Example
Imagine a 35-year-old professional earning a good salary but expecting even higher income in retirement.
They decide to convert $30,000 from their traditional IRA to a Roth IRA.
Their current marginal federal income tax rate is 22%, and they anticipate an average annual Roth growth rate of 6% over a 20-year projection period.
- Calculate the Tax Due: The immediate tax bill is $30,000 × 0.22 = $6,600.
- Project Roth Value: The $30,000 will grow tax-free at 6% for 20 years. Its future value is $30,000 × (1.06)^20 = $30,000 × 3.2071 = $96,214.
- Compare to Traditional (After-Tax): If the $30,000 remained in a traditional IRA and grew to $96,214, and then was taxed at 22% upon withdrawal, the after-tax value would be $96,214 × (1 - 0.22) = $75,047.
- Roth Advantage: The Roth conversion offers a tax-free advantage of $96,214 - $75,047 = $21,167 over 20 years.
The immediate tax cost is $6,600, but the long-term tax-free growth provides a significant advantage.
Every $1 paid in conversion tax today saves $3.21 in future withdrawal taxes.
Understanding Roth Conversion Strategies
Roth conversions offer a unique opportunity to lock in your tax rate on retirement savings, potentially saving significant amounts in the long run. A key strategic advantage is for those who believe their income and thus their tax bracket will be higher in retirement.
For instance, in 2026, the 24% marginal tax bracket applies to single filers with taxable income between approximately $100,526 and $191,950. If you expect your retirement income to exceed this, converting now at a lower rate can be highly beneficial. While direct Roth contributions have income limits, there are no income limits for Roth conversions, making the "backdoor Roth" a popular strategy for high-income earners.
Typical Tax Rates and Growth Expectations for Roth Conversions
When evaluating a Roth conversion, understanding typical tax rates and realistic growth expectations is crucial. Marginal federal income tax rates range from 10% to 37%. Many individuals considering conversions fall into the 22%, 24%, or 32% brackets.
Regarding growth, a diversified portfolio in a Roth IRA might realistically expect an average annual return between 5% and 8% over the long term, depending on asset allocation and market conditions. For example, a 6% average growth rate over 20 years will more than triple your investment ($30,000 grows to $96,214), and this entire gain would be tax-free in a Roth. Use a growth rate that aligns with your investment strategy and risk tolerance.
Frequently Asked Questions
Do I owe taxes when rolling over a traditional IRA to another traditional IRA?
No, a rollover from one traditional IRA to another is not a taxable event as long as the funds are deposited within 60 days or transferred directly. Taxes are only triggered when you convert pre-tax IRA money into a Roth IRA.
How is the tax on a traditional-to-Roth IRA rollover calculated?
The taxable amount equals the portion of the rollover that was never previously taxed. For most traditional IRA holders, the entire rollover amount is taxable at your ordinary income tax rate. The pro-rata rule requires you to consider all your traditional IRA balances.
What is the pro-rata rule and how does it affect my IRA rollover taxes?
The pro-rata rule states that you cannot selectively roll over only the after-tax portion of your traditional IRAs. Each distribution is treated as a proportional mix of pre-tax and after-tax funds across all of your traditional IRAs.
Can a Roth IRA rollover push me into a higher tax bracket?
Yes. The converted amount is added to your ordinary income for the year, which can push part or all of the conversion into a higher marginal tax bracket. This is why many advisors recommend spreading large conversions over multiple tax years.
Does this calculator account for state income taxes on IRA rollovers?
No. This calculator uses the federal tax rate you enter. Most states also tax Roth conversions as ordinary income. Add your state income tax rate for a more accurate total tax estimate.