Short answer: a Roth conversion ladder is a series of yearly conversions from a traditional IRA to a Roth IRA. You pay ordinary income tax on each conversion in the year you make it. Under IRS rules, converted money can then come out without the 10% early-withdrawal tax once its own five-year period has passed, a period that starts on January 1 of the year you convert. Convert a slice every year from the start of early retirement, and from year six on, one slice becomes available each year. You need other money to live on for the first five years.
This guide covers US federal rules for people under 59½ with money in a traditional IRA or a 401(k) they can roll into one. It doesn’t apply outside the US, and state income tax rules vary. It’s general education, not tax advice; every rule below links to the IRS publication it comes from.
Why early retirees use a ladder
Withdrawals from a traditional IRA before age 59½ generally carry a 10% additional tax on top of income tax, unless an exception applies. Roth IRA withdrawals follow different rules: what you put in comes out first, and converted amounts are free of the 10% tax once they have aged five years. A ladder uses that to turn pre-tax savings into money you can reach in your 40s or early 50s, paying income tax along the way, often in years when your income is low.
How to build one, step by step
- Get the money into a traditional IRA. After you leave a job, a 401(k) can usually be rolled into a traditional IRA. (A rollover straight into a Roth IRA is taxed the same way as a conversion, per IRS Publication 590-A.)
- Convert an amount each year. Tell your IRA provider to convert part of the traditional IRA to a Roth IRA. The amount is included in your gross income for that year. Publication 590-A says that if the conversion is done properly, the 10% additional tax on early distributions doesn’t apply to the conversion itself.
- Report it. Conversions are reported on Form 8606 with your tax return.
- Wait out the five years. Each conversion has its own five-year period, starting on the first day of the tax year in which you convert (Publication 590-B).
- Withdraw the oldest rung. Once a conversion’s period is over, you can withdraw that converted amount without the 10% tax. You already paid income tax on it when you converted.
The two five-year rules
Two different clocks apply, and mixing them up is the most common mistake.
| Clock | When it starts | What it decides |
|---|---|---|
| Conversion five-year period | January 1 of the year of each conversion. A separate period applies to each conversion. | Whether withdrawing that converted amount before 59½ triggers the 10% additional tax. |
| Qualified-distribution five-year period | January 1 of the first tax year for which a contribution was made to a Roth IRA for you. | Whether earnings can come out tax-free. A distribution is “qualified” only after this period and once you are 59½, disabled, or meet a few other conditions. |
Because the conversion clock starts on January 1, a conversion made in December has the same release date as one made in January of that year.
What comes out first
You don’t choose which dollars you withdraw from a Roth IRA. Publication 590-B sets the order:
- Regular contributions you made directly to a Roth IRA. These can come out at any time without tax or the 10% additional tax.
- Conversion and rollover contributions, oldest first. Within each conversion, the part that was taxable when you converted comes out first.
- Earnings, last. Before a qualified distribution, earnings can be taxable and may also carry the 10% additional tax.
That order works in your favor: a ladder withdraws old conversions long before it reaches earnings, as long as you take out no more than you have contributed and converted.
A hypothetical ladder, year by year
Hypothetical example, not a recommendation. Alex is single, retires at 40 at the start of 2027, spends $40,000 a year and has a traditional IRA, a taxable brokerage account and some cash. Alex converts $40,000 each year and lives on the taxable account until the first rung opens.
| Year | Converted | Available without the 10% tax from | Alex lives on |
|---|---|---|---|
| 2027 | $40,000 | January 1, 2032 | Taxable account and cash |
| 2028 | $40,000 | January 1, 2033 | Taxable account and cash |
| 2029 | $40,000 | January 1, 2034 | Taxable account and cash |
| 2030 | $40,000 | January 1, 2035 | Taxable account and cash |
| 2031 | $40,000 | January 1, 2036 | Taxable account and cash |
| 2032 | $40,000 | January 1, 2037 | The 2027 conversion |
| 2033 | $40,000 | January 1, 2038 | The 2028 conversion |
The bridge is the hard part: Alex needs five years of spending, $200,000 here, outside the traditional IRA. It can come from a taxable account, cash, Roth IRA contributions (which come out first and are always available), or part-time income.
What the conversions cost in tax
A conversion is taxed like wages. With no other income, the standard deduction covers the first slice and the lowest brackets cover the next. Using the IRS’s tax year 2026 figures for a single filer (standard deduction $16,100; 10% on taxable income up to $12,400; 12% up to $50,400):
| Converted (no other income) | Taxable income | Federal income tax | Share of the conversion |
|---|---|---|---|
| $16,100 | $0 | $0 | 0% |
| $40,000 | $23,900 | $2,620 | 6.6% |
| $66,500 | $50,400 | $5,800 | 8.7% |
Real tax bills are rarely this clean. Dividends and capital gains from the taxable account you are living on also count as income and can push conversions into higher brackets. Married couples filing jointly have roughly double the thresholds ($32,200 standard deduction, 12% bracket up to $100,800 in 2026). If you live in a state with an income tax, add it.
Pitfalls to plan around
- No undo. Conversions made in 2018 or later can’t be recharacterized back to a traditional IRA (Publication 590-A). Convert what you’re sure about, often late in the year once your income is known.
- After-tax money in any traditional IRA. If you have ever made nondeductible contributions, part of each conversion is tax-free and part is taxable, calculated across all your traditional, SEP and SIMPLE IRAs on Form 8606. You can’t convert only the after-tax dollars.
- Health insurance subsidies. A conversion raises your income for the year. HealthCare.gov counts most IRA and 401(k) withdrawals as income for Marketplace savings, so a large conversion can shrink a premium tax credit. Run the numbers before you convert.
- Touching earnings early. If you withdraw more than your contributions and old conversions, you reach earnings, which can be taxed and hit with the 10% additional tax before a qualified distribution.
- Required minimum distributions. Later in life, an amount you are required to withdraw for the year can’t be converted (Publication 590-A). This rarely affects early retirees but matters if a ladder runs into your 70s.
- Rules change. Tax law changed in 2017 and again in 2025. A ladder spans a decade or more, so check the current IRS publications each year.
Other ways to reach retirement money early
The IRS lists exceptions to the 10% additional tax. Two matter most to early retirees: a series of substantially equal periodic payments (available from IRAs and workplace plans), and, for workplace plans such as a 401(k) but not IRAs, leaving your job during or after the year you turn 55. Both have their own rules; a ladder is often combined with them rather than chosen instead.
Sources
- IRS, Publication 590-A (2025), Contributions to Individual Retirement Arrangements: conversions, income from conversions, no recharacterization after 2017, required distributions.
- IRS, Publication 590-B (2025), Distributions from Individual Retirement Arrangements: the 10% additional tax, the five-year period for each conversion, ordering rules, qualified distributions.
- IRS, About Form 8606, Nondeductible IRAs.
- IRS, IR-2025-103, tax year 2026 inflation adjustments (October 9, 2025).
- IRS, Retirement topics: exceptions to tax on early distributions (last reviewed December 11, 2025).
- HealthCare.gov, What to include as income.
Related reading: the 4% rule vs 3.5% for how much you can draw each year, sequence-of-returns risk for why the first years of retirement matter most, and the FIRE calculator to size the whole plan.
