Key Takeaways
- The IRS values a Roth conversion on its conversion-day price, not on the pre-drop value, so a decline lowers the taxable amount.
- A 20% decline lets the same shares convert on roughly 20% less taxable ordinary income, and the recovery then grows tax-free inside the Roth.
- In a hypothetical example, a $200,000 IRA position that falls to $160,000 converts on $40,000 less taxable income at the same 24% rate.
- In 2026, the married-filing-jointly 24% bracket runs to $403,550 and the single 24% bracket to $201,775.
- In 2026, IRMAA surcharges begin above $109,000 single or $218,000 joint MAGI on a two-year lookback, so a 2026 conversion can raise 2028 premiums.
- A Roth conversion is irreversible; recharacterization was eliminated for conversions made in 2018 and later.
- RMDs begin at 73, or 75 for those born in 1960 or later, with the earliest age-75 RMD year 2035.
Down-Market Conversion: 2026 Figures
Figures are hypothetical illustrations and 2026 thresholds cited in this article, and may change.
Understanding why market crashes create Roth conversion opportunities starts with one fact: the IRS taxes a Roth conversion on its value the day you convert, never on what the account was worth before the drop. When a down market lowers that value, the same shares move into a Roth on a smaller taxable amount, and the recovery then grows tax-free.
Market crashes create Roth conversion opportunities because a conversion is taxed on its value the day it is processed, not on its pre-drop value. A 20% decline lets you convert the same number of shares on roughly 20% less taxable income, then the rebound grows tax-free inside the Roth. It is a discount on the taxable amount, not a change in your tax rate.
Why market crashes create Roth conversion opportunities
Market crashes create Roth conversion opportunities because the IRS values a conversion on the day it happens. A Roth conversion adds the current value of the moved assets to your ordinary income for the year and taxes it at your marginal rate. When prices fall, that current value falls with them, so the same shares generate a smaller tax bill.
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The share count does not change during a decline. A traditional IRA that held 1,000 shares of a fund before a drop still holds 1,000 shares after it. What fell is the price the IRS reads on conversion day, so the tax follows the depressed price down.
Because the recovery then happens inside the Roth, every future dollar of rebound and growth comes out tax-free, for your life, a surviving spouse’s life, and the heirs’ 10-year window under the SECURE Act. Converting at a low valuation moves more of that future recovery into the tax-free account for the same tax cost.
A down market discounts the taxable amount, not your tax rate
A down market lowers the dollar figure the IRS taxes, not the rate applied to it. This is the point most explanations miss: a crash is not a tax break or a lower bracket. It lets you convert more shares for the same tax cost, because each share is worth less on conversion day. The rate on your return stays the same; the taxable amount shrinks.
Think of it as buying the conversion at a discount. If you planned to convert a set dollar amount, a decline lets you move a larger slice of your traditional IRA in shares while staying inside the same taxable amount and the same bracket. When the market recovers, that larger slice recovers inside the Roth rather than the still-taxable traditional IRA.
A hypothetical before-and-after example
A simple illustration shows how a decline lowers the taxable amount of a Roth conversion. Assume a married couple filing jointly planned to convert an IRA position worth $200,000, and a 20% market decline drops that position to $160,000 before they convert. The figures below are a hypothetical illustration of the mechanics, not a projection of any result.
| Convert before the decline | Convert at the depressed value | |
|---|---|---|
| Position value on conversion day | $200,000 | $160,000 |
| Taxable ordinary income added | $200,000 | $160,000 |
| Illustrative tax at a 24% marginal rate | $48,000 | $38,400 |
| Taxable amount converted on | Full pre-drop value | $40,000 lower |
| Where the recovery grows | Traditional IRA (taxed later) | Roth IRA (tax-free) |
In this illustration the couple converts on $40,000 less taxable income. If those same shares later recover from $160,000 back toward $200,000, that rebound occurs inside the Roth and is not taxed again. For a 2026 married-filing-jointly couple, the 24% bracket runs up to $403,550 of taxable income, so a conversion of this size may fit without reaching the 32% bracket, depending on their other income.
Pay the conversion tax with cash outside the IRA
Paying the conversion tax with savings held outside the IRA lets the full converted balance rebound tax-free. If you instead withhold the tax from the converted dollars, that money never reaches the Roth and never recovers there, and anyone under 59 and a half may also owe a 10% penalty on the withheld amount. Outside cash keeps the entire position working inside the Roth.
This is why a down-market conversion tends to fit households that hold taxable brokerage or savings cash to cover the bill. The tax is due for the year of the conversion, and the conversion itself is not net investment income, though a large conversion can raise the income that exposes other earnings to the 3.8% net investment income tax above $200,000 single or $250,000 joint MAGI.
The strongest windows pair a down market with a low-income year
A market decline helps most when it lands in a low-income year. Many retirees have a gap between the year work income stops and the year required minimum distributions and Social Security push income back up. In those years the marginal rate is often lower, so a down market and a low bracket compound: more shares convert for the same tax, at a rate you may not see again. For the broader framework, see navigating Roth conversions in a volatile market.
Required minimum distributions now start at age 73, or age 75 for anyone born in 1960 or later, with the earliest age-75 RMD year being 2035. Converting during the earlier low-income window can shrink those later RMDs. Deciding how much to convert depends on filling a target bracket without crossing into the next one, and on your projected RMDs, not on the size of the decline alone.
The risk the market keeps falling, and why staged conversions help
The main risk is that the market keeps falling after you convert. A conversion is irreversible, so if prices drop further, you have already paid tax on a value that has since declined again. The tax bill from conversion day does not change, but a lower balance now sits in the Roth. Nobody can time the exact bottom of a decline.
Partial, staged conversions spread that timing risk. Instead of converting the full amount at one price, you convert in tranches as the decline develops, which averages your conversion price across the window rather than betting on a single day. Running a break-even analysis first shows how many years of tax-free growth it takes for a conversion to pay off, which helps size each tranche.
When a market drop is not a reason to convert
A market drop by itself is not a reason to convert. Convert only when a lower valuation lines up with room in your bracket, your Medicare IRMAA position, and your ability to pay the tax from outside cash. A conversion that pushes income too high can raise your rate or your future premiums, which can outweigh the discount from the decline.
Watch three limits before acting during a crash:
- Your bracket. For 2026, the 22% bracket runs to $100,800 of taxable income for joint filers and $50,400 for single filers, and the 24% bracket to $403,550 joint or $201,775 single. A conversion that crosses a bracket edge is taxed at the higher rate.
- Medicare IRMAA. Higher-premium surcharges begin above $109,000 single or $218,000 joint MAGI, on a two-year lookback, so a 2026 conversion can raise 2028 premiums.
- Ability to pay. If the only way to pay the tax is from the IRA itself, the down-market advantage largely disappears.
Frequently asked questions
Is it a good idea to do a Roth conversion when the market is down?
A down market can make a conversion more tax-efficient because the IRS taxes it on the depressed value, letting you move the same shares on less taxable income. Whether it fits depends on your bracket, your Medicare IRMAA exposure, and whether you can pay the tax from outside cash. Many investors convert only when a low valuation aligns with those conditions.
Should I do a Roth conversion during a market crash?
A crash may create a favorable moment because a conversion is taxed on its value that day, not on its pre-crash value, so more shares convert for the same tax. It is not automatically right for everyone. The decision often depends on having room in your bracket, a low-income year, and savings outside the IRA to cover the tax. What a downturn does to the rest of the account is covered in how to protect a 401(k) from a market crash.
Can you undo a Roth conversion?
No. A Roth conversion is irreversible. The recharacterization option that once let taxpayers reverse a conversion was eliminated for conversions made in 2018 and later. Once you convert, the taxable amount for that year is locked in, which is why staging conversions in tranches during a decline can help manage the risk that prices keep falling.
How does the IRS calculate tax on a Roth conversion?
The IRS adds the value of the converted assets on the conversion date to your ordinary income for the year and taxes it at your marginal rate. Pre-drop values and expected recovery do not matter, only the conversion-day value. A conversion has a December 31 deadline, is uncapped, and cannot include a required minimum distribution. See the 2026 conversion deadline details.
What is the best time to do a Roth conversion?
Many investors find low-income years the most efficient, especially the gap between retirement and the start of Social Security or RMDs at 73, or 75 for those born in 1960 or later. A market decline in one of those years can compound the effect. The right timing depends on your bracket, IRMAA thresholds, and cash to pay the tax.
Do you still pay taxes on a Roth conversion if the market is down?
Yes. A conversion is taxable ordinary income regardless of market direction. A decline does not remove the tax; it lowers the dollar amount the tax is calculated on, because the IRS uses the conversion-day value. You still owe tax at your marginal rate on that lower figure, ideally paid from savings held outside the IRA.
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Q3 Advisors is a registered investment adviser focused on retirement tax planning. This page is educational and is not advice; consult a qualified professional.
