TL;DR
- Convert traditional IRA/401(k) money to Roth each year. After 5 years, withdraw the converted amount penalty-free and tax-free.
- The 5-year clock runs by calendar year. A December 2026 conversion becomes available January 1, 2031, same as a January 2026 conversion.
- You need 5 years of living expenses from other sources (brokerage, Roth basis, cash) before the first rung of the ladder produces usable money.
The Roth Conversion Ladder is the most popular early retirement access strategy for a reason: once it's built, it produces tax-free, penalty-free income for life. No age restrictions. No SEPP modification traps. No IRS formula dictating how much you can take.
But there's a catch that trips people up. You need to fund 5 years of expenses before the ladder starts producing. That gap is where planning matters most.
How the Roth Conversion Ladder Works
Step 1: Roll your old 401(k) into a traditional IRA (if you haven't already). This gives you a single pool of pre-tax money to convert from.
Step 2: Each year, convert a specific dollar amount from the traditional IRA to a Roth IRA. You'll owe ordinary income tax on whatever you convert, but if you're doing this in early retirement with little other income, you'll likely pay far less tax than you would later.
Step 3: Wait 5 calendar years from the conversion. Then withdraw the converted amount, penalty-free and tax-free.
Step 4: Repeat every year. After the initial 5-year build phase, a new "rung" of the ladder becomes available annually.
The 5-Year Rule, Precisely
The 5-year holding period for Roth conversions operates on a calendar-year basis, not a full 60-month period. This is a critical distinction.
Money converted any time during 2026 (whether January 2 or December 30) satisfies the 5-year rule on January 1, 2031. The IRS counts the conversion year as year one. So the actual waiting period can be as short as roughly 4 years and 1 day (converting December 31, 2026, available January 1, 2031) or as long as 5 full years (converting January 1, 2026, available January 1, 2031).
Important: This 5-year rule for conversions is different from the 5-year rule for Roth earnings. Earnings require both a 5-year holding period AND age 59½. Conversions only require the 5-year period. Don't conflate the two. They're separate rules under IRC §408A.
A Year-by-Year Walkthrough
Meet Sarah and David, both 46, married filing jointly. They just retired with $900,000 in a traditional IRA, $180,000 in a taxable brokerage account, $42,000 in Roth IRA contribution basis, and $40,000 in cash. Their annual spending is $65,000.
| Year | Action | Living Expenses Funded By | Conversion Amount | Federal Tax on Conversion |
|---|---|---|---|---|
| 2026 (age 46) | Convert to Roth | Brokerage + cash | $70,000 | ~$4,580 |
| 2027 (age 47) | Convert to Roth | Brokerage | $70,000 | ~$4,580 |
| 2028 (age 48) | Convert to Roth | Brokerage + Roth basis | $70,000 | ~$4,580 |
| 2029 (age 49) | Convert to Roth | Roth basis | $70,000 | ~$4,580 |
| 2030 (age 50) | Convert to Roth | Roth basis + small brokerage | $70,000 | ~$4,580 |
| 2031 (age 51) | Ladder produces! | 2026 conversion ($70k) | $70,000 | ~$4,580 |
| 2032+ | Ongoing | Prior year's conversion | $70,000 | ~$4,580 |
The Tax Math at $70,000 (Married Filing Jointly, 2026)
With no other income and a $70,000 Roth conversion:
- Standard deduction: $31,500 (taxed at 0%)
- First $23,850 of taxable income: 10% bracket = $2,385
- Remaining $14,650 ($70,000 − $31,500 − $23,850): 12% bracket = $1,758
- Total federal tax: $4,143
- Effective rate: 5.9% on the full $70,000
That's the math. An effective 5.9% rate to move $70,000 from taxable-forever (traditional IRA) to tax-free-forever (Roth). If that money were withdrawn later under RMDs in a 22% or 24% bracket, the conversion saves real money.
Why not convert more? Say, fill the entire 12% bracket up to $128,450? You could. But every dollar of conversion counts toward MAGI, and Roth conversions affect ACA subsidies. For a family of two, a MAGI above roughly $81,760 (400% of the 2026 Federal Poverty Level for a 2-person household) could cost thousands in lost premium tax credits. The optimal amount balances tax bracket filling against ACA subsidy preservation.
[INSERT CHART: Timeline diagram showing 5-year ladder build with funding sources for each year: brokerage, Roth basis, cash, then transition to ladder income]The Mistake Most Early Retirees Make
Starting the ladder too late. If you retire at 46 and don't begin conversions until 47, you've pushed every rung of the ladder back a year. That's one extra year you need to fund from bridge accounts, and one fewer year of tax-free Roth growth.
The ideal move: begin conversions in the calendar year you retire, even if you worked for part of that year. Your W-2 income makes the conversion less tax-efficient that year, but it starts the clock. Consider converting a smaller amount in year one if your income is still high, then ramping up in subsequent years.
How Much Should You Convert Each Year?
The conversion amount depends on three competing priorities:
- Tax bracket filling: Convert up to the top of the 12% bracket for the lowest rates. For MFJ in 2026, that's $128,450 in gross income ($96,950 taxable + $31,500 deduction). See Filling the 12% Tax Bracket Strategy for the exact math.
- ACA subsidy preservation: Stay below 400% FPL to keep marketplace subsidies. This often creates a lower ceiling than the tax bracket.
- Future spending needs: Convert enough each year so that in 5 years, the available rung covers your annual expenses.
For many early retirees, the ACA constraint is the binding one. See How Roth Conversions Affect ACA Subsidies for the full tradeoff analysis.
Model Your Roth Conversion Ladder
Take a married couple, age 48, with $800,000 in a traditional IRA and no other income. Convert $96,950 to fill through the 12% bracket. The standard deduction covers the first $31,500 at 0%. Plug those numbers into BridgeToFI's calculator and see the 20-year tax impact.
Model Your Roth Conversion Amount →Key Takeaways
Start the clock early. Each year of delay pushes every rung back by one year.
5-year rule is by calendar year. December 2026 conversion → available January 1, 2031.
You need bridge funding. 5 years of expenses from brokerage, Roth basis, or cash before the ladder produces.
Watch MAGI. Conversions count as income and can cost you ACA subsidies worth $10,000+/year.
2026 sweet spot (MFJ, no other income): $128,450 in conversions stays within 12%. Effective rate: ~8.5%.
Frequently Asked Questions
Q: How does the 5-year rule work for Roth conversions?
Each conversion starts its own 5-year clock based on the calendar year. A conversion made any time in 2026 becomes available January 1, 2031. The IRS counts the conversion year as year one, regardless of what month you convert.
Q: Do I pay taxes on Roth conversions?
Yes, ordinary income tax on the converted amount. The strategy advantage is doing conversions in low-income years (early retirement) when your marginal rate might be 10-12% instead of the 22-24% you'd pay while working or under RMDs.
Q: What do I live on during the 5-year waiting period?
Taxable brokerage account withdrawals, Roth IRA contribution basis (available anytime without penalty), cash savings, and potentially part-time income. Planning this bridge funding is one of the most critical parts of the strategy.