Roth Conversion Income Limits 2026: There Aren't Any

This is one of the most common misconceptions in retirement planning. The income limits apply to Roth IRA contributions — not conversions. If you have money in a traditional IRA or 401(k), you can convert it to a Roth IRA at any income level, with no annual dollar cap.

Contributions vs. conversions: the key distinction

People conflate two transactions that sound similar but operate under completely different rules:

A conversion is not putting new money into a Roth IRA. It is moving money that already exists in a tax-deferred account. The IRS has placed no income gate on this transaction since 2010.

2026 Roth IRA contribution income limits (source of the confusion)

The income limits that do exist apply exclusively to direct Roth IRA contributions — fresh dollars deposited into a Roth IRA from outside your retirement accounts.

If your income is below these thresholds, you can contribute directly to a Roth IRA — up to $7,500/year ($8,600 if age 50+). These are the only income limits in the Roth IRA rulebook. They have nothing to do with conversions.

Why people think there's a conversion income limit

Before 2010, a $100,000 MAGI ceiling did prevent high earners from converting. The Tax Increase Prevention and Reconciliation Act of 2005² permanently eliminated that restriction, effective January 1, 2010. Anyone who learned about Roth conversions before 2010 — or who read an old guide — may still be carrying the now-obsolete rule in their memory.

The repeal is permanent. There is no scheduled sunset, no legislative proposal to reinstate it. The income limit on conversions is gone.

What actually constrains conversions: the "soft ceilings"

Just because there's no income limit doesn't mean you should convert without limit. There are four practical constraints — none of them disqualify you, but all of them affect how much you should convert in a given year:

1. Federal tax bracket management

Every dollar you convert is taxed as ordinary income in the year of conversion. The goal is to convert up to the top of your target bracket — typically 22% or 24% — without spilling into a higher one.

Use the tax bracket calculator to see exactly how much room you have at each rate, given your other income sources.

2. IRMAA — the Medicare premium cliff

If you're on Medicare (or will be in two years), watch the IRMAA thresholds. IRMAA is calculated from your income two years prior, so a 2026 conversion affects 2028 Medicare premiums. Tier 1 begins at $109,000 MAGI (single) / $218,000 MAGI (MFJ) and adds $630+/year per person in 2026.⁴

High earners who already pay IRMAA may convert freely above these thresholds — they're already in a tier. Pre-retirees approaching Medicare need to plan two years ahead. The IRMAA-aware calculator shows the conversion ceiling that avoids each tier.

3. ACA subsidies (for early retirees)

Pre-Medicare retirees on Marketplace health insurance face the hardest constraint. The 400% FPL cliff restored in 2026 means conversions that push MAGI above $62,600 (single) / $84,600 (couple) eliminate all premium tax credits — potentially costing $10,000–$25,000 in lost subsidies in a single year.⁵

This is a binding constraint only during the years you're on ACA coverage — typically from retirement until Medicare at 65.

4. Social Security benefit taxation

Once your "combined income" (AGI + half of SS benefits + tax-exempt interest) exceeds $32,000 (MFJ) / $25,000 (single), up to 85% of Social Security benefits become taxable.² Conversion income stacks on top of other income — so each conversion dollar can trigger an additional 0.85 cents of SS taxation, creating an effective marginal rate multiplier in the phase-in zone. The Social Security and Roth conversion guide shows the full math.

Together, these four constraints create a practical annual conversion ceiling — not an eligibility limit. You can always convert; the question is how much to convert in a given year to minimize lifetime tax.

High earners and Roth conversions

Ironically, the wealthiest pre-retirees are often the best candidates for Roth conversions:

• Large traditional IRA balances. A $3M–$5M IRA will generate $200,000–$400,000 of annual RMDs starting at 73 — pushing into the 32–37% bracket permanently. Converting at 22–24% during the golden window saves $300,000+ over the course of retirement.
• Retirement income gap. Executives and high earners who retire in their 60s often have a 5–10 year period before pensions, Social Security, and RMDs stack up — a window where their income drops significantly even if their assets are large.
• Estate planning leverage. Inherited Roth IRAs have no annual RMD requirements under the SECURE Act. High earners converting at 24% can save heirs the 32–37% they'd pay on inherited traditional IRA distributions over a 10-year forced withdrawal window.
• No IRMAA concern for conversions done pre-65. If you're 62 and not yet on Medicare, IRMAA is irrelevant for now. You have years of maximum conversion capacity before the Medicare constraint becomes binding.

Worked example: $3M IRA, no income limit to worry about

James and Linda, both 64, retired last year. James earned $450,000 as a VP of engineering through age 63 — well above any Roth IRA contribution threshold. But their income was always irrelevant to conversions.

Situation today:

• $3.0M traditional IRA (James)
• $400,000 Roth IRA from prior conversions (Linda)
• No Social Security yet (delaying to 70)
• No pension
• Portfolio dividends and interest: ~$30,000/year

Annual income without conversions: ~$30,000 (dividends/interest). After standard deduction ($32,200 for MFJ), taxable income ≈ $0. They are in the 10% bracket. This is their lowest tax window since their careers began.

Conversion room at 22% bracket: The 22% MFJ bracket tops out at $211,400 taxable income. Standard deduction: $32,200. That means $211,400 + $32,200 = $243,600 MAGI at the top of 22%. Subtracting $30,000 of existing income: ~$213,600 of annual conversion room at or below 22%.

IRMAA check: converting $213,600 puts MAGI at ~$243,600 — above Tier 1 ($218,000 MFJ). To stay below Tier 1, they can convert $218,000 − $30,000 = ~$188,000. Whether to cross Tier 1 or stay below it depends on how many more years of conversion capacity they have and the Medicare cost over two years.

At $188,000/year for 9 years (ages 64–72): $1.69M of IRA balance converted. Remaining ~$1.3M generates RMDs starting at 73 — more manageable, and entirely in a lower bracket. Lifetime estimated tax savings vs. no conversions: $350,000–$450,000 federal.

James's prior income — including the years at $450,000 — plays no role in this analysis. There was never an income limit to worry about.

Still working at high income: the backdoor Roth connection

If you are still working and earning above the $252,000 MFJ / $168,000 single contribution phase-out, you cannot contribute directly to a Roth IRA. But you can still:

• Convert existing traditional IRA balances — no income limit applies.
• Use the backdoor Roth — contribute $7,500 to a non-deductible traditional IRA, then convert it immediately. This is the standard workaround for high earners who want Roth contribution exposure. However, a large existing traditional IRA balance triggers the pro-rata rule, which can make the backdoor Roth nearly worthless. See the backdoor Roth IRA guide for the full pro-rata math.
• Build your conversion base now — if you're 55–63 and still working, converting while your income is high means a higher tax rate this year. But if you have a separation coming, consider whether deferring conversions to the year you retire (when income drops) is worth more than converting now.

Frequently asked questions

Sources

1. IRS Notice 2025-67 — 2026 retirement plan limits including Roth IRA contribution phase-out ranges ($153,000–$168,000 single, $242,000–$252,000 MFJ) and IRA contribution limit ($7,500). Values verified May 2026.
2. IRS Publication 590-A: Contributions to Individual Retirement Arrangements (IRAs) — covers Roth IRA eligibility rules, the elimination of the income limit on conversions effective 2010, and the Social Security combined income thresholds under IRC § 86.
3. IRS Rev. Proc. 2025-32 (via IRS.gov newsroom) — 2026 federal income tax brackets and standard deductions. Single: 12% tops at $50,400, 22% at $105,700, 24% at $201,775. MFJ: 12% tops at $100,800, 22% at $211,400, 24% at $403,550. Standard deductions: $16,100 single / $32,200 MFJ.
4. CMS — Medicare Part B Premiums 2026 — 2026 IRMAA thresholds: Tier 1 begins at $109,000 single / $218,000 MFJ MAGI (based on 2024 income). Base Part B premium: $202.90/month.
5. HHS Federal Poverty Level Guidelines (2025) — 400% FPL thresholds used to calculate ACA subsidy cliff: approximately $62,600 (single) / $84,600 (couple) in 2026.