How Much Tax Will You Pay on a Roth Conversion? (2026)

How much tax will you pay on a Roth conversion in 2026?

You pay ordinary income tax on the amount you convert, at your 2026 federal rates, plus any state tax your state charges. There is no single flat rate: the conversion stacks on top of your other income, so it fills your remaining bracket space first and spills into higher brackets only if it is large enough.

How do tax brackets actually work on a conversion?

Think of brackets as buckets filling from the bottom up. Your income fills the 10% and 12% buckets first, and your conversion pours into whatever room is left. A $20,000 conversion might be taxed partly at 12%, partly at 22%, and partly at 24%.

This stacking is why the effective rate matters more than the headline bracket. Use our free Roth conversion calculator to see both your blended effective rate and the marginal bracket you land in.

What are the 2026 tax brackets used for Roth conversions?

The 2026 federal brackets come from IRS Revenue Procedure 2025-32. For single filers, the thresholds are 10% up to $12,400, 12% up to $50,400, 22% up to $105,700, 24% up to $201,775, 32% up to $256,225, 35% up to $640,600, and 37% above that. Joint filers get roughly double thresholds.

These brackets apply to taxable income, not gross income. Subtract your 2026 standard deduction: $16,100 if single, $32,200 if filing jointly. Itemizers should subtract itemized deductions.

How do you calculate the tax on a $20,000 conversion?

Take a single filer with $60,000 of taxable income before converting. Their tax before the conversion is $7,912: $1,240 at 10%, $4,560 at 12%, and 22% of the $9,600 sitting above $50,400. Add a $20,000 conversion and taxable income becomes $80,000, with tax of $12,312. The difference, $4,400, is the conversion tax.

In that example the effective rate is exactly 22%, because the whole conversion stayed inside the 22% bracket. But with $100,000 before converting, tax before is $16,712 and tax after is $21,398, so the conversion tax is $4,686 (23.4% effective). The conversion crossed into the 24% bracket.

When is the deadline for a 2026 Roth conversion?

December 31, 2026, with no exceptions and no extension to tax day. A conversion counts in the year the money actually arrives in the Roth IRA, not the year you request it. Custodian processing takes days, so do not start in the last week of December.

Unlike IRA contributions, which you can make for 2026 until April 2027, conversions have no grace period.

Can you undo a Roth conversion if you change your mind?

No, not since 2018. Before the Tax Cuts and Jobs Act, you could recharacterize a conversion and undo it if markets fell or your taxes changed. Congress removed that option; today a conversion is permanent the moment it completes, with no do-over.

Convert in stages instead: convert just enough each year to fill your current bracket. That keeps the effective rate low and limits the damage if markets fall.

What is the 5-year rule for Roth conversions?

Each conversion starts its own 5-year clock. If you withdraw converted principal before that clock runs out and you are under 59 and a half, a 10% early-withdrawal penalty can apply to the converted amount. This is separate from the 5-year rule on Roth earnings, which governs when earnings can come out tax-free.

The rule matters most if you might need the money soon. Funds left invested for years are rarely affected, but an early withdrawal from a conversion you also use as backup could add a penalty.

When does a Roth conversion actually make sense?

A conversion makes sense when your tax rate today is lower than the rate you expect later. The classic window is early retirement: work has stopped and Social Security and required minimum distributions have not begun, so income is unusually low. Filling those low brackets is one of the best tax moves available.

It also helps when you can pay the tax from outside the IRA, so the full amount lands in the Roth and grows tax-free. Paying from the conversion itself shrinks the balance and, under 59 and a half, can add a penalty. Our Roth vs traditional IRA calculator can help frame the comparison.

When should you not do a Roth conversion?

Do not convert if you expect a lower bracket in retirement than today, because you would pay tax now at a higher rate than you would pay later. That is a loss, not a saving, however good tax-free growth sounds. The same applies if the conversion pushes you into a much higher bracket.

Also pause if the tax bill would strain your cash, or if extra income triggers side effects: higher Medicare premiums through IRMAA, lower ACA subsidies, or higher capital gains rates. Run the full picture first.

Do you pay state tax on a Roth conversion?

In most states, yes. A conversion is taxed as ordinary income by your state as well as federally, at your state rate. A few states have no income tax or exempt some retirement income, but assume state tax applies on top.

Our calculator covers federal tax only, so add your state rate. In a high-tax state the combined bill can run several points above the federal figure.

What are the most common questions about Roth conversions?

Is a Roth conversion taxed as income or as a capital gain?

As ordinary income, in the year of the conversion. The amount is added to your other income and taxed at your regular brackets, not at capital gains rates. Only future growth inside the Roth escapes tax, if the withdrawal rules are met.

Can you convert just part of an IRA?

Yes. Partial conversions are common and often smarter than converting everything at once. Converting a slice each year fills low brackets repeatedly and keeps each year’s tax bill manageable.

Can required minimum distributions be converted?

No. You must take your required minimum distribution first; only money above that amount can be converted. The RMD itself cannot move into a Roth IRA.

Should you convert in a down market?

Often, yes. Converting when values are depressed means tax on a smaller amount, and the recovery then happens inside the tax-free Roth. But conversions cannot be undone, so only convert money you can leave invested.

Disclaimer: This article is general information only, not tax advice. Tax law depends on your situation, including state rules, credits, and Medicare effects. Consult a qualified tax professional before converting.