Last Updated: May 2026

The Roth Conversion Ladder

Convert a slice of your Traditional IRA every year, at a bracket you choose, instead of letting RMDs choose for you at 73.

A conversion ladder is not a product or an account type. It is a schedule: a series of partial conversions sized so that each year's taxable income stops just short of the next bracket. Done across the years between retirement and age 73, it can move a large share of a Traditional balance into tax-free territory at rates well below what RMDs would eventually trigger.

For early retirees it does a second job — each conversion becomes accessible penalty-free five years later, creating a legal bridge to retirement money before 59½.

Why the Window Between 60 and 73 Matters

For most retirees there is a stretch of years where earned income has stopped, Social Security has not started, and RMDs have not begun. Taxable income during those years is often the lowest it has been since early career — and every unused dollar of the 12% or 22% bracket in those years is capacity that expires unused.

Once RMDs begin at 73, the IRS decides your taxable income for you. A $1.2 million Traditional IRA produces a first-year RMD of about $45,000 whether you need the money or not, on top of Social Security, pushing many households into a higher bracket than they occupied while working.

2026 Federal Brackets: Your Conversion Ceilings

Rate	Single taxable income	Married filing jointly
10%	Up to $11,925	Up to $23,850
12%	$11,925 – $48,475	$23,850 – $96,950
22%	$48,475 – $103,350	$96,950 – $206,700
24%	$103,350 – $197,300	$206,700 – $394,600
32%	$197,300 – $250,525	$394,600 – $501,050
35%	$250,525 – $626,350	$501,050 – $751,600
37%	Over $626,350	Over $751,600

Highlighted rows are the brackets most conversion ladders target. Amounts are taxable income after deductions, not gross income.

A Worked Example

A married couple retires at 63 with $900,000 in a Traditional IRA and $250,000 in taxable savings. Their only income is $30,000 of interest and dividends. After the standard deduction their taxable income is roughly $0.

Converting to the top of the 12% bracket means bringing taxable income up to $96,950 — about $97,000 of conversion per year at a blended federal cost near 10%. Over the ten years to age 73 that moves close to $970,000 of principal, more than the current balance, at rates far below the 22% or 24% their RMDs would otherwise occupy.

They pay the roughly $10,000 annual tax bill from the taxable account rather than withholding it from the conversion, so the full $97,000 lands in the Roth and keeps compounding tax-free. Model your own version here.

The Five-Year Rule, Precisely

Every conversion starts its own five-year clock, and the clock starts on January 1 of the conversion year. A conversion made on December 20, 2026 is treated as beginning January 1, 2026 and becomes accessible penalty-free on January 1, 2031.

This rule applies to the 10% early distribution penalty on converted principal, and it stops mattering once you are 59½. It is separate from the rule on earnings, which requires that you have held any Roth IRA for five years and are 59½ before earnings come out tax-free.

Early retirees stack these clocks deliberately: convert at 45, spend that tranche at 50, and keep the ladder rolling so a matured tranche is always available.

Three Cliffs That Cost More Than the Bracket

IRMAA. Medicare Part B and D surcharges are set by modified AGI from two years earlier. A single dollar over a threshold raises premiums for the full year. Conversions at 62 and 63 hit premiums at 64 and 65 — plan the largest conversions before that lag begins to bite.

ACA premium tax credits. If you retire before 65 and buy marketplace coverage, a conversion raises the income that determines your subsidy. The effective marginal cost of a conversion in those years can exceed 40% once lost credits are counted.

Capital gains stacking. Long-term capital gains are taxed at 0% while taxable income stays below $48,350 single or $96,700 married. A conversion sits underneath those gains and can push them from 0% into 15% — a cost that does not appear anywhere in the ordinary bracket table.

Run the Numbers

Compare the after-tax outcome in the Roth conversion calculator, check eligibility rules on the 2026 Roth IRA income limits page, or see what RMDs would look like without a ladder in the RMD calculator.

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Frequently Asked Questions

A Roth conversion ladder is a series of annual partial conversions from a Traditional IRA or 401(k) to a Roth IRA, sized each year to fill a target tax bracket without spilling into the next one. Each conversion starts its own five-year clock, after which the converted principal can be withdrawn penalty-free regardless of age. Early retirees use ladders to access retirement money before 59½; retirees over 59½ use them to shrink the Traditional balance before RMDs begin at 73.

Each conversion has a separate five-year holding period before the converted amount can be withdrawn without the 10% early distribution penalty. The clock starts January 1 of the conversion year, so a conversion made in December 2026 becomes accessible on January 1, 2031. This is distinct from the five-year rule on earnings, which requires that any Roth IRA has been open five years and that you are 59½ before earnings come out tax-free. After 59½ the conversion five-year rule no longer imposes a penalty.

The gap between retiring and the year RMDs and Social Security begin. Earned income has stopped, RMDs have not started, and taxable income is often at its lowest point in decades — which means conversions can be done in the 10%, 12%, or 22% bracket. Converting during this window reduces the balance that will later be divided by an RMD divisor, lowers future taxable income, and can keep you under IRMAA Medicare surcharge thresholds later. Waiting until 73 to think about it eliminates the opportunity.

Convert the amount that fills your current bracket without crossing into the next. For a single filer in 2026, converting up to $103,350 of taxable income stays inside the 22% bracket; married filing jointly stays in 22% up to $206,700. Also watch two cliffs that are not brackets: IRMAA thresholds, which raise Medicare premiums two years later based on modified AGI, and ACA premium tax credits if you retire before 65. Both can make a conversion far more expensive than the marginal rate suggests.

No. Recharacterization of conversions was eliminated by the Tax Cuts and Jobs Act effective in 2018. Once you convert, the tax is owed for that year regardless of what the market does afterward. This is why conversions are usually done late in the year, when income for the year is known, and why converting more than the target bracket allows is difficult to correct.

From taxable savings, whenever possible. Withholding the tax from the converted amount shrinks the balance that goes into the Roth, and if you are under 59½ the withheld portion is also treated as an early distribution subject to the 10% penalty. Paying from a brokerage or cash account moves the full converted amount into a tax-free account and effectively increases how much tax-advantaged space you own.

Projections are estimates based on your inputs and assumed rates of return. Actual investment performance, tax rates, and Social Security benefits will differ. This calculator does not constitute financial, tax, or legal advice. Consult a qualified financial advisor for personalized retirement planning.