How does this Roth conversion calculator work?
Enter the amount you are thinking about converting, how many years until you would need the money, an expected annual return, your tax bracket today, your expected bracket later, and whether you would pay the conversion tax from outside savings or from the IRA itself. The calculator grows both paths side by side, taxing the converted amount now and the traditional balance on the way out, and shows which one leaves you with more after-tax dollars at the end.
Should you convert a traditional IRA to a Roth?
Converting means shifting money out of a pre-tax traditional IRA and into a Roth, and the IRS collects ordinary income tax on the converted amount right away in exchange for tax-free growth from then on with no future required distributions. Someone sitting in the 12% bracket who converts $60,000 would owe roughly $7,200 in federal tax today, and in return the full balance grows untaxed for the rest of their life. Run both paths through the calculator above to see them side by side.
How to use the Roth conversion calculator
- Enter the amount and your balance. Set the portion of your traditional IRA you are considering moving this year, plus the account's total starting value.
- Set both tax rates. Provide your bracket today and your projected bracket in retirement, along with how many years the money will grow and an assumed annual return.
- Compare the two paths. The calculator lines up after-tax dollars at retirement for converting now against staying traditional, along with roughly where the two paths cross.
What actually happens when you convert
A Roth conversion pulls pre-tax money out of a traditional IRA, 401(k) or comparable account and moves it into a Roth IRA. Ordinary income tax comes due on the converted amount during the year the conversion happens. After that point, growth is tax-free and qualified withdrawals stay tax-free for good. Conversions have no income ceiling, so even high earners who are blocked from contributing to a Roth directly can still convert.
The whole decision typically boils down to a single comparison: your tax rate on the conversion today against the rate you would otherwise pay on withdrawals down the road. Paying a low rate now locks in growth that is never taxed again. Even paying a higher rate now can be the smarter move if it dodges an even steeper rate later. The tricky part is guessing your future bracket accurately, which is exactly the gap this calculator is built to close.
Using low-income years to your advantage
The strongest window for a lot of people falls in the years after paychecks stop but before Social Security and required distributions start. Taxable income can drop sharply during that stretch, opening room to convert while sitting in a lower bracket. A frequent tactic is converting just enough to use up the remaining space in the 12% or 22% bracket without spilling over into the next one.
This timing matters because required distributions begin at 73 and get calculated off your entire traditional balance. Leave that balance unconverted and a sizable IRA can force large taxable withdrawals later, compounding on top of Social Security and dragging you into a steeper bracket. Converting during these low-income years chips away at the traditional balance driving those future RMDs.
How Elaine puts the calculator to work. Elaine is 62, retired ahead of schedule, and will not start Social Security until she turns 68. Her traditional IRA holds $350,000, and with no paycheck coming in this year, her taxable income sits well below normal. That opens room to convert roughly $35,000 while staying inside the 12% federal bracket.
She plugs in a $35,000 conversion, a 12% rate today, and a projected 22% rate later, since she expects RMDs stacked on Social Security to push her income higher down the line. The calculator shows about $4,200 owed in tax now. Since that same slice would have been taxed at 22% eventually, converting saves roughly $3,500 on this piece alone, and every dollar it earns from here on grows completely tax-free.
Elaine intends to repeat this move each gap year, converting a similar amount annually until Social Security starts. She pairs it with a guaranteed contract inside the Roth so the converted balance grows without risk while she waits it out.
Pairing a MYGA with a Roth
Once dollars land inside a Roth, growth is already tax-free, which makes a steady, guaranteed return a natural pairing. A multi-year guaranteed annuity works much like a CD from an insurance company: it locks a fixed rate for a set term with no exposure to market swings. Rates vary by term and carrier and move often, so we do not print a live number here. Held inside a Roth, that locked interest compounds with no tax drag whatsoever and comes out completely tax-free later.
This combination appeals especially to gap-year converters who want certainty. Having just paid tax to convert, most retirees would rather not watch that balance ride the market's ups and downs. A MYGA fixes the rate so the Roth grows on a known path. A licensed strategist can shop the strongest guaranteed rate for your term across several top carriers.
When converting tends to pay off
- Your bracket in retirement looks higher than today's. Expecting more income later from RMDs, pensions and Social Security layered on top of investment income makes paying tax now, at a lower rate, an easy call.
- You have money outside the IRA to cover the tax bill. Paying the conversion tax from other savings lets the entire converted amount grow inside the Roth untouched.
- Leaving a tax-free inheritance matters to you. Heirs get a full decade of tax-free growth on an inherited Roth, versus owing ordinary income tax on an inherited traditional account.
- Cutting future RMDs is a priority. A Roth carries no required minimum distributions during your lifetime.
When converting probably does not make sense
- Your bracket in retirement is likely to be lower than it is right now.
- Paying the conversion tax would have to come out of the IRA itself, shrinking the very principal meant to grow tax-free.
- The conversion would shove you into IRMAA surcharges or a higher bracket without enough upside to justify it.
- The money is earmarked for charity, since charities owe no tax on traditional IRA dollars anyway, making the conversion pointless.
What this calculator leaves out
This tool gives you a directional read, not tax advice. Real-world conversion planning has several more moving parts:
- State income tax, since some states tax conversions and others do not
- IRMAA Medicare premium brackets, where a conversion can spike one or two years of premiums
- Provisional income used to tax Social Security benefits, which our Social Security taxable benefits calculator can help you think through
- Net Investment Income Tax
- The 5-year rule that applies to converted Roth dollars
Conversion math gets personal fast, so confirm your specific numbers with a tax professional before pulling the trigger. For the official rules, see the IRS guidance on Roth IRAs and its FAQ on rollovers and conversions. When you are ready to explore the guaranteed-growth side of the equation, browse our annuity calculators or ask a licensed strategist for a no-cost MYGA quote.
Frequently asked questions
Does converting to a Roth trigger the early withdrawal penalty?
No. Converting funds does not, by itself, set off the 10% early-withdrawal penalty, even for someone under 59 and a half. You do owe ordinary income tax on whatever gets converted, but the act of converting carries no penalty on its own. A penalty could still apply later if converted money is pulled back out too soon, which is governed by a separate 5-year clock.
What is the 5-year rule that applies to conversions?
Each individual conversion starts its own 5-year countdown on the principal that moved over, separate from the 5-year clock that applies to Roth earnings generally. Someone under 59 and a half who withdraws converted funds before that particular conversion's 5 years are up owes the 10% penalty on that amount. Past 59 and a half, this conversion-specific clock stops mattering for penalty purposes.
Once I convert, can I change my mind?
No. The option to reverse a conversion, known as recharacterization, was eliminated by tax reform passed in 2017. A conversion is permanent from the moment it happens, which is exactly why breaking a large conversion into smaller pieces spread across several years tends to be the safer route rather than converting everything at once.
Could converting push up my Medicare premiums?
It is possible. Converted dollars count toward your modified adjusted gross income, and Medicare looks at that figure from two years earlier when setting IRMAA surcharges on Part B and Part D. A single oversized conversion in one year can bump you into a costlier IRMAA tier for that year. Spacing conversions out across multiple years is a common way to stay under those income lines.
Are Roth IRAs subject to required minimum distributions?
No, and that is one of their strongest selling points. A Roth IRA carries no forced withdrawal schedule while the original owner is alive. That is precisely why moving traditional dollars into a Roth shrinks the balance that would otherwise drive future RMDs, handing you more control over your taxable income once retirement arrives.
Sources
Educational only, not investment, tax or legal advice. Tax Free Wealth Plan LLC is a licensed insurance agency, not a registered investment adviser or broker-dealer. Annuities are not bank deposits, are not FDIC insured and are not guaranteed by any government agency. Guarantees are backed solely by the claims-paying ability of the issuing insurance company. Features, rates and availability vary by state and change over time; the contract and disclosure documents govern.