Reviewed September 2026.
A low-income year (layoff gap, sabbatical, parental leave, early retirement before Social Security, business loss) can create bracket room for a Roth conversion. Mechanics and “when” tradeoffs live in When should I convert a traditional IRA to Roth. This page is the year-timing plan: how to size the conversion, what cliffs to watch, and how to pay the tax without raiding the IRA.
Tax brackets, credits, and IRMAA thresholds change. Confirm current IRS and SSA/Medicare figures for the year you convert.
Build a conversion budget for this tax year
- Estimate taxable income before any conversion (wages, unemployment, capital gains, pension starts).
- Note room under the top of your target federal bracket (and state bracket if you have one).
- List cliffs that a conversion can trip: premium tax credit repayment, other income-tested benefits, and future IRMAA if you are near Medicare.
- Decide the conversion amount below those cliffs, not “whatever is in the IRA.”
- Set aside non-IRA cash to pay the tax (pay-from-cash rule of thumb).
- Check pro-rata if you hold after-tax basis across traditional IRAs.
There is no IRS annual conversion dollar cap. Soft caps are brackets, cash for taxes, and benefit cliffs.
Timing moves inside the year
| Move | Why it helps |
|---|---|
| Convert after you can estimate full-year income | Avoids overshooting when a new job starts mid-year |
| Split across two tax years | Uses two years of lower brackets instead of one spike |
| Prefer December only when income is already known | Last-minute guesses create April surprises |
| Track each conversion’s 5-year clock | Each conversion has its own early-distribution penalty clock if those converted dollars are withdrawn early; earnings still follow the Roth IRA’s separate qualified-distribution rules |
| Early-retirement ladder planning | Separate playbook: Roth conversion ladder |
Worked example: layoff year bracket fill (single filer, tax year 2026)
Casey is a single filer. Casey earns $55,000 of wages before a June layoff, then collects $8,000 unemployment ($63,000 total income). After the $16,100 standard deduction (2026 single), taxable income is $46,900, still in the 12% federal bracket. Casey has $120,000 in a traditional IRA and $8,000 taxable cash for taxes.
Using 2026 IRS single brackets, the 22% bracket ends at $105,700 of taxable income, so there is about $58,800 of room under that ceiling ($105,700 − $46,900). Casey still chooses a smaller conversion because cash for taxes and a premium-tax-credit / other cliff cushion matter more than filling the entire bracket:
- Casey converts $16,000. Incremental federal tax ≈ $3,170 ($3,500 still in the 12% band to the 12% top at $50,400, then $12,500 at 22%), before state tax and other interactions. Recompute with the year’s tables.
- Casey pays the bill from the $8,000 cash sleeve so the full $16,000 can sit in the Roth.
- Casey could convert much more (even $50,000 would leave taxable income near $96,900, still under the 24% start) but refuses to spend the cash cushion or risk benefit cliffs.
If Casey starts a new job in October at a high salary, Casey pauses further conversions until next year’s projection is clear.
Checklist
- Draft a full-year taxable income estimate before you click convert.
- Name your target bracket ceiling and any credit/IRMAA cliffs.
- Size the conversion under those ceilings; partial is normal.
- Pay tax from non-IRA cash when possible.
- Keep custodian confirms and file Form 8606 when required.
- Re-run the plan next January; one good year does not require an automatic repeat.
Educational only. Not tax or investment advice. Brackets, credits, IRMAA lookbacks, and conversion reporting rules change; confirm on IRS.gov and with a qualified tax professional.