Roth Conversion Ladder: A Step-by-Step Strategy

The Early Retiree’s Access Problem

If you have been saving aggressively for financial independence, much of your wealth may sit in traditional 401(k) and IRA accounts. Those accounts gave you a deduction on the way in, but money taken out before age 59½ generally owes a 10% additional tax on top of ordinary income tax. ¹ For someone who stops working at 40 or 45, that leaves a gap of fifteen years or more in which the largest pool of savings is expensive to reach.

The Roth conversion ladder is the standard workaround in the FIRE community. Each year you move a slice of your traditional IRA into a Roth IRA and pay ordinary income tax on it, ideally at the low rates available once your paycheck has stopped. Five years later that slice can come out of the Roth with no tax and no 10% additional tax. Convert every year and a new slice becomes available every year.

The ladder is a way to reach your own money early. Whether converting also lowers your lifetime tax bill, and how much to convert for that purpose, is a separate question that the Roth conversion calculator answers with your own numbers.

What Is a Roth Conversion?

A Roth conversion moves money from a traditional IRA (or a traditional 401(k) that has been rolled over into an IRA) into a Roth IRA. The pre-tax amount you convert is included in your income for the year of the conversion. If the money goes into the Roth properly, the 10% additional tax on early distributions does not apply to the conversion itself. ² Conversions made in 2018 or later cannot be undone by recharacterization. ²

Once the money is in the Roth, it grows tax-free, and the tax bill on the converted dollars is settled. What you pay depends on when you convert. During your working years a conversion stacks on top of your salary. In early retirement, with no wages, the standard deduction and the 10% and 12% brackets can sit empty, and a conversion fills them first.

The 5-Year Rule

Each conversion has its own five-year period, which starts on the first day of the tax year in which you convert. If you are under 59½ and withdraw converted money inside that period, you may owe the 10% additional tax on the part of the conversion that was taxable. ¹ The clock runs from January 1 regardless of the date you actually convert.

For example, if you convert $50,000 on March 15, 2026, the five-year period starts January 1, 2026, and that conversion can come out free of the additional tax on January 1, 2031. A conversion made in 2027 becomes available on January 1, 2032.

This is why the strategy is called a ladder. Each year you add a rung by converting another chunk. After the first five years, one rung seasons every year, which gives you a continuous stream of money that has already been taxed.

The order money leaves a Roth IRA

The IRS treats Roth withdrawals as coming out in a fixed order: regular contributions first, then conversions on a first-in, first-out basis (the taxable part of each conversion before any nontaxable part), and earnings last. ¹ Two things follow for a ladder. Your direct Roth contributions are the first dollars out and are never taxed or subject to the additional tax, so they are a ready reserve during the bridge years. ¹ And because earnings come out last, a ladder that withdraws no more than your contributions plus seasoned conversions never touches them.

Earnings follow a different rule. They come out tax-free only in a qualified distribution, which requires both age 59½ (or disability, death, or a first-home purchase) and five tax years since your first contribution to any Roth IRA. ¹

How the Ladder Works: Step by Step

Step 1: Prepare Your Bridge Funds

You need enough accessible money to cover living expenses, plus the tax on your conversions, for the five years before the first rung seasons. The bridge usually comes from a taxable brokerage account, cash, HSA reimbursements for past medical expenses, or Roth IRA contributions. Plan on roughly five years of spending.

Step 2: Begin Annual Conversions

Each year, convert part of your traditional IRA to your Roth IRA. Size the conversion to the spending you will need five years from now and to the low brackets you have room in, and check it against the ACA income limit if you buy marketplace coverage (covered below).

Step 3: Pay the Tax From Outside the IRA

The conversion is ordinary income on that year’s return. Pay the federal and any state tax from taxable savings rather than by withholding from the conversion. Tax withheld from the IRA never reaches the Roth, so it is a distribution, and before 59½ it can owe the 10% additional tax that a completed conversion avoids. ² Because there is no withholding, you may need estimated tax payments. ²

Step 4: Live Off Bridge Funds

For the first five years, spend from taxable accounts, cash, or Roth contributions. The converted money keeps growing in the Roth but is not yet free of the additional tax.

Step 5: Begin Withdrawing Seasoned Conversions

In year six the first conversion has finished its five-year period and can be withdrawn with no tax and no additional tax. Each later year another rung becomes available. From here you convert new money each year and spend money converted five years earlier.

Step 6: Reassess at 59½

From 59½ you can withdraw from a traditional IRA without the 10% additional tax, though you still owe income tax. ¹ The ladder is no longer needed for access. Many people keep converting to shrink future required minimum distributions (RMDs); whether that pays is the lifetime-tax question the Roth conversion calculator is built for.

Sizing Conversions to the 2026 Brackets

Federal brackets apply to taxable income, which is income after the standard deduction. For 2026 the standard deduction is $16,100 for a single filer and $32,200 for a married couple filing jointly. ³ The 2026 brackets for a single filer are: ^{3, 4}

• 10% on taxable income up to $12,400
• 12% from $12,400 to $50,400
• 22% from $50,400 to $105,700
• 24% from $105,700 to $201,775
• 32% from $201,775 to $256,225
• 35% from $256,225 to $640,600
• 37% above $640,600

For a married couple filing jointly, the 12% bracket starts at $24,800, 22% at $100,800, 24% at $211,400, 32% at $403,550, 35% at $512,450, and 37% at $768,700. ³

A single filer under 65 whose only income is the conversion can convert $66,500 in 2026 ($16,100 standard deduction plus $50,400, the top of the 12% bracket) and stay inside the 12% bracket. The federal tax is $1,240 on the first $12,400 plus 12% of the next $38,000, or $5,800, an average rate of 8.7% on the amount converted. A married couple under 65 with no other income can convert $133,000 at the same 8.7% average rate. Dividends, interest, and realized capital gains from the bridge account use up part of that room.

Some early retirees fill the 22% bracket too, especially with a large traditional balance. Whether paying 22% now beats the rate those dollars would face later depends on your balance, Social Security, survivor and heir tax rates, and returns. The Roth conversion calculator runs that comparison bracket by bracket; for one modeled couple there, filling the 12% bracket came out ahead and larger fills did not.

State Tax Considerations

Most states with an income tax tax conversions as ordinary income, so your conversion cost is the federal rate plus the state rate. Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming do not tax wage or IRA income, and some early retirees time their conversion years around a move to one of them.

Two caveats on that list. Washington enacted a 9.90% tax on income above a $1 million deduction in 2026, effective in 2028 and currently being litigated, so its place among the no-income-tax states is no longer settled. And a few states with an income tax exempt retirement income, including conversion income; Illinois lets residents subtract IRA distributions, including amounts converted to a Roth. ⁵ That can make them cheaper to convert in than a low flat-rate state. Whether to convert before or after a move is often worth more than the choice of destination: how state taxes affect retirement works through the timing with a break-even calculator.

The ACA Subsidy Cliff

For early retirees buying marketplace health insurance, the conversion counts toward the household income that sets the premium tax credit. The enhanced credits expired after 2025. For 2026 the credit is available only to households with income from 100% to 400% of the federal poverty line, and any excess advance credit must be repaid in full, with no cap. ^{6, 7} Coverage in 2026 is measured against the January 2025 poverty guidelines, which put 400% at $62,600 for one person and $84,600 for two in the 48 contiguous states and DC. ⁸

One dollar over that line can cost the whole year’s credit. A single early retiree who fills the 12% bracket with a $66,500 conversion lands $3,900 over the $62,600 limit before counting any dividends or capital gains. For anyone relying on the credit, the 400% line usually caps the conversion before the tax brackets do. The ACA subsidy cliff guide shows what the credit is worth at each income level.

RMD Considerations

Required minimum distributions from traditional IRAs and 401(k)s begin at 73 for people born from 1951 through 1959 and at 75 for people born in 1960 or later. ^{9, 10} Each year’s RMD is the prior December 31 balance divided by a factor from the IRS Uniform Lifetime Table: 26.5 at 73 and 24.6 at 75. ¹ The factor shrinks every year, so the required percentage rises.

For someone whose RMDs start at 73, a $2 million traditional IRA requires a first RMD of $75,472 ($2,000,000 divided by 26.5). That income arrives on top of Social Security and anything else, whether you need it or not.

Every dollar converted before RMDs start is a dollar that will not be in the traditional balance those RMDs are figured from. Roth IRAs have no RMDs during the owner’s lifetime. ¹ After the owner dies, most non-spouse beneficiaries must empty an inherited IRA, Roth included, by the end of the tenth year. ¹

A Worked Example

Profile: Alex is 45 in 2026, single, and retires at the start of the year with $1.2 million in a traditional IRA (rolled over from a 401(k)), $300,000 in a taxable brokerage account, and $50,000 in a Roth IRA, all of it from past contributions. Alex spends $50,000 a year. Born in 1981, Alex starts RMDs at 75.

Summitward calculation. Assumptions: every account earns a 4% real return, all figures are in today’s dollars, 2026 federal rules are held flat, spending and conversions happen at the start of each year, and the year Alex turns 59 is treated as the last year before 59½. The example leaves out Social Security, state income tax, capital-gains tax on sales from the taxable account, and ACA premium credits.

The plan

Alex converts $50,000 every January from 45 through 74. After the $16,100 standard deduction, taxable income is $33,900, and the federal tax is $1,240 plus 12% of $21,500, or $3,820 a year (7.6% of the conversion). Alex pays it from the taxable account. The $50,000 conversion also stays under the $62,600 ACA limit for one person, with $12,600 of room for dividends and gains.

Years 1 through 5: the bridge

From 45 through 49, Alex draws $53,820 a year from the taxable account ($50,000 of spending plus $3,820 of tax), $269,100 in all. With growth, $61,800 is left in the taxable account at the end of age 49. The Roth has received $250,000 of conversions.

Year 6 onward: the ladder pays out

At 50, Alex starts taking $50,000 a year from the Roth. Under the ordering rules the first withdrawal is the $50,000 of original contributions; the next year’s is the 2026 conversion, which seasoned on January 1, 2031, and so on. Because the contributions went first, in this example Alex has $100,000 of contributions and seasoned conversions available at the start of each year from 50 through 59 and withdraws $50,000, so a spare year sits in reserve. The remaining taxable money keeps paying the conversion tax until it runs out at 74.

Where the example stands

Summitward calculation with the assumptions above. With the ladder: $1.5 million converted in $50,000 steps from 45 through 74. Without the ladder: no conversions; spending comes from the taxable account until it runs out during age 51, then from Roth contributions, then from IRA withdrawals sized to net $50,000 after federal income tax and, through age 59, the 10% additional tax. Balances at 59½ are end of age 59.

In this example, the taxable account and Roth contributions carry Alex to 52 without a ladder. From 52 through 59, every IRA withdrawal owes the 10% additional tax, $44,600 in all. A series of substantially equal periodic payments under section 72(t) is the main way to avoid that additional tax without a ladder, at the cost of a fixed withdrawal schedule. ¹

By 75, the ladder in this example roughly halves the traditional balance and the first RMD, from $75,400 to $39,700, and builds a $912,000 Roth that has no RMDs. It does so by paying more federal income tax before 75: $114,600 against $98,600, though the no-ladder path also paid the $44,600 additional tax. Whether the ladder comes out ahead over a whole lifetime depends on how long Alex lives, the tax rate on later RMDs once Social Security starts, and what heirs pay. That comparison is what the Roth conversion calculator runs.

Common Mistakes

1. Converting Too Much in a Single Year

A large one-year conversion pushes income into higher brackets. In 2026, a single filer with no other income who converts $150,000 at once owes $24,734 of federal tax, with part of it taxed at 22% and 24%. Spread over three years at $50,000 each, the same $150,000 owes $11,460, all of it in the 10% and 12% brackets. The large conversion would also be far over the ACA limit.

2. Forgetting the ACA Subsidy Cliff

A conversion that pushes household income past 400% of the poverty line can cost the entire year’s premium tax credit, and for 2026 any excess advance credit must be repaid in full. ⁶ Estimate the year’s dividends and capital gains before choosing the conversion amount, and convert late in the year when those numbers are known.

3. Insufficient Bridge Funds

The first rung does not season for five years. Retiring without enough bridge money can force early IRA withdrawals that owe the 10% additional tax, or withdrawals of Roth earnings that may owe tax as well. Plan the bridge before you leave your job.

4. Ignoring State Taxes

If your state taxes conversions as income, the cost of each conversion is higher than the federal rate alone. Include the state rate in your target, and if a move is likely, compare converting before and after it.

5. Not Revisiting the Plan

The 2025 reconciliation law, P.L. 119-21, made the current individual income tax rates permanent from 2026 onward, so the brackets no longer have a scheduled expiration date. ¹¹ Congress can still change them, and RMD ages, ACA credits, and standard deductions have all changed in recent years. Revisit the conversion amount every year.

Frequently Asked Questions

How long do I have to wait to withdraw a Roth conversion?

Five tax years, counted from January 1 of the year you convert. A conversion made any time in 2026 can be withdrawn free of the 10% additional tax from January 1, 2031. The wait matters only before 59½. ¹

Can I withdraw my Roth IRA contributions during the bridge years?

Yes. Regular contributions are the first money out of a Roth IRA and are never taxed or subject to the additional tax, at any age. ¹

How much should an early retiree convert each year?

At least what you expect to spend five years from now, within the low brackets. In 2026 a single filer with no other income can convert $66,500 and stay in the 12% bracket, and a married couple $133,000. If you rely on ACA premium credits, the 400% poverty-line limit, $62,600 for one person in 2026, often binds first. ^{3, 8}

Do I need a ladder if I have enough taxable savings to reach 59½?

Not for access. You may still want to convert in low-income years to shrink later RMDs. The Roth conversion calculator compares converting with not converting for your inputs.

What if I do not have five years of bridge money?

Roth contributions, a 72(t) series of substantially equal payments, and the age-55 separation exception for workplace plans can cover part of the gap. Withdrawing before 59½ without the penalty compares them.

Related Guides

Related reading:

• Roth Conversion Calculator: How Much to Convert Each Year sizes conversions by lifetime tax, the question this guide leaves aside.
• RMD Calculator: Your Required Minimum Distribution and What It Costs in Tax projects your RMDs to 95 and shows the tax rate on each year’s withdrawal, the number to compare with a conversion’s cost.
• The ACA Subsidy Cliff Is Back explains why a conversion sized on income tax alone can cost you the health insurance subsidy in the same year.
• Withdrawing Before 59½ Without the Penalty puts the conversion ladder alongside the Rule of 55, 72(t), and the other penalty-free paths, with a true-cost calculator.
• Mega Backdoor Roth Before 59½ applies the same per-conversion 5-year clock to MBDR rollovers to a Roth IRA, with a simulator that walks the tier-by-tier ordering stack.
• Your FI Number defines the portfolio target that determines when you can start executing a Roth ladder.
• Safe Withdrawal Rate covers how much you can withdraw each year, the spending side of your Roth conversion planning.
• Tax-Loss Harvesting shows how to offset conversion taxes with capital losses in taxable accounts.
• Monte Carlo Simulation tests whether your conversion strategy holds up across thousands of market scenarios.
• RSU Tax Strategy addresses how employer stock vests interact with your tax bracket, a key input when planning conversion amounts.

Key Takeaways

• The ladder solves the access problem. Converted money can leave a Roth IRA free of the 10% additional tax once its five-year period ends, even before 59½.
• Each conversion starts its own clock on January 1. Plan five years of spending and conversion tax from taxable savings, cash, or Roth contributions.
• Size conversions to the low brackets and the ACA limit. In 2026 a single filer with no other income can convert $66,500 in the 12% bracket, but the ACA limit for one person is $62,600.
• Pay the conversion tax from outside the IRA. Tax withheld from the conversion before 59½ is an early distribution.
• Conversions shrink later RMDs. In the worked example, converting $50,000 a year cut Alex’s first RMD at 75 from $75,400 to $39,700; whether that lowers lifetime tax is a separate calculation.

Sources

1. Internal Revenue Service. Publication 590-B, Distributions from Individual Retirement Arrangements (IRAs), 2025 edition: “Additional Tax on Early Distributions,” “Ordering Rules for Distributions,” “What Are Qualified Distributions?,” “Must You Withdraw or Use Assets?,” and Appendix B, Table III (Uniform Lifetime). irs.gov
2. Internal Revenue Service. Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs), 2025 edition, “Converting From Any Traditional IRA Into a Roth IRA” and “Recharacterizations.” irs.gov
3. Internal Revenue Service. “IRS releases tax inflation adjustments for tax year 2026, including amendments from the One, Big, Beautiful Bill.” irs.gov
4. Internal Revenue Service. Revenue Procedure 2025-32, 2026 tax rate tables and standard deduction. irs.gov
5. Illinois Department of Revenue. Publication 120, Retirement Income. tax.illinois.gov
6. Internal Revenue Service. “Questions and answers on the premium tax credit.” irs.gov
7. 26 U.S.C. 36B, refundable credit for coverage under a qualified health plan; subsection (c)(1)(A) for the 100% to 400% eligibility range. law.cornell.edu
8. U.S. Department of Health and Human Services. “Annual Update of the HHS Poverty Guidelines,” 90 Fed. Reg. 5917, January 17, 2025. govinfo.gov
9. 26 U.S.C. 401(a)(9)(C)(v), applicable age for required minimum distributions, as amended by SECURE 2.0 Act section 107. law.cornell.edu
10. Proposed regulations, “Required Minimum Distributions,” 89 Fed. Reg. 58644, July 19, 2024 (applicable age 73 for 1959 births). federalregister.gov
11. Congressional Research Service. R48611, “Tax Provisions in P.L. 119-21, the FY2025 Reconciliation Law,” section 70101. July 29, 2025. congress.gov

Editor’s note

Rules and figures were checked against IRS, Federal Register, HHS and CRS sources in October 2026. The worked example is a Summitward calculation under the stated assumptions and is not a forecast. This guide is educational and is not tax advice; confirm a conversion plan with a tax professional before acting on it.