Roth Conversion for Pharmacists: 2026 IRMAA & Tax Planning
A Roth conversion for early retirees works differently than it does for a 68-year-old, because the years between an early retiree’s last paycheck and first required minimum distribution are the lowest-income, lowest-tax years they may ever have, and because before age 65 every converted dollar also raises the income that sets that retiree’s Affordable Care Act (ACA) marketplace subsidy.
For an early retiree, a Roth conversion is a multi-year timing decision, not a one-time move. Converting pre-tax IRA or 401(k) dollars in a low-income gap year can fill a target tax bracket cheaply. But before 65 the amount converted is often capped by the ACA subsidy cliff, which under current law for 2026 sits at 400% of the federal poverty level, roughly $62,600 for one person (Source: HHS 2025 poverty guidelines).
Roth conversion for early retirees: why your income gap changes the math
For an early retiree, the years between the last paycheck and the first required minimum distribution are typically the lowest-income years, so the same pre-tax dollars can convert at a lower rate than they would have during the working years. Before 65, though, each converted dollar also lifts the income that sets the ACA marketplace subsidy, which shapes how much is converted.
Most early retirees hold the bulk of their savings in pre-tax accounts: a traditional 401(k), a 403(b), a Thrift Savings Plan (TSP), a SEP, or a rollover IRA. Every dollar in those accounts is taxed as ordinary income when it comes out. A Roth conversion moves some of that money into a Roth IRA now, ordinary income tax is paid on the converted amount this year, and future qualified growth and withdrawals come out tax-free (Source: IRS Pub. 590-B, 2025).
What makes the early-retiree case distinct is the shape of the income. While the retiree was working, wages pushed income into higher brackets, so conversions were expensive. After work stops and before Social Security and required minimum distributions begin, taxable income can drop close to zero. That gap is when converting the same dollars can cost far less. Two groups sit in this SERP: FIRE retirees in their 40s and early 50s who want penalty-free access to pre-tax money before 59½, and traditional early retirees aged roughly 55 to 63 who want to lower lifetime tax. The rules below serve both. A Roth conversion is different from a Roth contribution: a contribution is limited to $7,500 for 2026 (plus a $1,100 catch-up at 50 and older) and requires earned income, while a conversion has no dollar or income limit (Source: IRS Notice 2025-67).
The retirement gap window: your Roth conversion tax desert
The “tax desert” is the stretch after wages stop but before Social Security and required minimum distributions start. Required minimum distributions do not begin until age 73, or 75 for those born in 1960 or later starting in 2035 (Source: SECURE 2.0 Act sec. 107). With little or no earned income, the 2026 standard deduction of $16,100 single or $32,200 married filing jointly shelters the first tranche of any conversion (Source: IRS Rev. Proc. 2025-32).
For a retiree who leaves work at 52 and delays Social Security to 70, that window can run close to two decades. During it, taxable income may consist of only interest, dividends, and small capital gains, which leaves room to convert pre-tax dollars at low rates. Once required minimum distributions switch on at 73 or 75, those forced withdrawals stack on top of Social Security and can push the retiree into a higher bracket for the rest of their life, which is the pattern conversions during the desert aim to avoid. See our overview of required minimum distributions for 2026 for how the age rules interact.
The Roth conversion ladder for FIRE and early retirement
A Roth conversion ladder is a repeating sequence in which a set amount is converted each year, and each conversion starts its own 5-year clock. Once a conversion has “seasoned” for 5 years, the converted principal can be withdrawn free of the 10% early-distribution penalty even for an account owner under 59½. The conversion itself is taxed as ordinary income, not penalized, at the time of conversion (Source: IRS Pub. 590-B, 2025).
The ladder works because of the IRS ordering rules for Roth IRA distributions. Money comes out in a fixed sequence: first regular contributions, which are always tax- and penalty-free; then conversions on a first-in, first-out basis, with the previously taxable portion penalty-free once 5 years have passed or the account owner reaches 59½; and finally earnings (Source: IRS Pub. 590-B, 2025). By converting a chunk every year, a FIRE retiree creates a rolling supply of principal that becomes accessible five years after each conversion. Reaching 59½ removes the 10% penalty on any converted amount regardless of whether its own 5-year period is complete (Source: IRS Topic no. 557). Because a conversion is irreversible for tax years after 2017, the amount is a decision that generally cannot be undone (Source: IRS guidance consistent with TCJA).
The two 5-year rules early retirees mix up
There are two separate 5-year clocks, and blurring them is a common ladder error. The per-conversion 5-year rule governs whether converted principal escapes the 10% penalty before 59½; each conversion has its own clock starting January 1 of the conversion year. The separate account-opening 5-year rule governs whether earnings come out tax-free as a qualified distribution (Source: IRS Pub. 590-B, 2025).
For a ladder, the per-conversion clock is the one that funds spending: a converted amount withdrawn within 5 years while under 59½ draws the 10% recapture penalty on that previously taxable amount (Source: IRS Pub. 590-B, 2025). The account-opening clock is about earnings, not principal, and matters more as the account owner approaches 59½ and starts touching growth. Because contributions and seasoned conversions come out ahead of earnings under the ordering rules, a well-built ladder rarely needs to disturb earnings during the early years. Getting both clocks documented per conversion year is part of any conversion plan.
A year-by-year Roth conversion ladder example
Consider a single retiree, age 50 in 2026, with about $900,000 in a rollover IRA, a taxable brokerage bridge fund, and prior Roth contributions. Converting $45,000 each year keeps modified adjusted gross income (MAGI) under the 2026 ACA cliff of $62,600 after dividends (Source: HHS 2025 poverty guidelines). Each conversion seasons for 5 years, so the first rung becomes penalty-free in year six. All figures below are illustrative only.
| Tax year | Age | Convert to Roth | Per-conversion 5-year clock ends | Living expenses funded by |
|---|---|---|---|---|
| 2026 | 50 | $45,000 | Jan 1, 2031 | Taxable bridge fund |
| 2027 | 51 | $45,000 | Jan 1, 2032 | Taxable bridge fund |
| 2028 | 52 | $45,000 | Jan 1, 2033 | Taxable bridge fund |
| 2029 | 53 | $45,000 | Jan 1, 2034 | Taxable bridge fund |
| 2030 | 54 | $45,000 | Jan 1, 2035 | Taxable bridge fund |
| 2031 | 55 | $45,000 | Jan 1, 2036 | 2026 rung ($45,000) now withdrawable penalty-free |
| 2032 | 56 | $45,000 | Jan 1, 2037 | 2027 rung ($45,000) seasoned |
| 2035-2036 | 59-60 | As needed | N/A | At 59½ the 10% penalty ends on all converted amounts |
The first five years of spending come entirely from the taxable bridge fund and prior Roth contributions, because no rung has seasoned yet. From 2031 onward, each newly seasoned rung can cover a year of expenses. This is the chicken-and-egg problem FIRE retirees hit: if nearly everything is pre-tax, the ladder alone cannot feed the household in years one through five, which is why the bridge fund below is not optional.
Building a 5-year bridge fund before the first conversion
Because the first ladder rung is locked for 5 years, an early retiree generally needs roughly five years of living expenses accessible outside the traditional IRA before the ladder starts: taxable brokerage assets, cash, prior Roth contributions (always withdrawable), or a 72(t) stream. Without that bridge, the retiree would be forced to tap unseasoned conversions early and trigger the 10% recapture penalty (Source: IRS Pub. 590-B, 2025).
In the table above, a spender who needs about $55,000 a year would want on the order of $275,000 in bridge assets before converting the first dollar. Prior Roth IRA contributions count toward the bridge because they come out first and are always tax- and penalty-free under the ordering rules. Sequencing the bridge, deciding which taxable lots to sell, and coordinating that with the conversion amount is where the plan lives.
Paying the Roth conversion tax from outside funds
The tax on a conversion can be paid from taxable or cash accounts rather than from the IRA being converted. If an under-59½ retiree withholds the tax out of the traditional IRA, that withheld amount is itself an early distribution and generally draws a 10% penalty, and fewer dollars reach the Roth (Source: IRS Pub. 590-B, 2025). Paying from outside funds moves the full converted amount into the Roth.
This is the second half of the FIRE chicken-and-egg problem. The same taxable bridge fund that covers living expenses also has to cover the conversion tax, so the bridge needs to be sized for both. A retiree filling low brackets during the desert will owe far less tax per converted dollar than they would have while working, but the cash still has to come from somewhere other than the pre-tax account. Our note on the Roth conversion break-even walks through how paying tax now compares with paying it later.
How much to convert to Roth each year in early retirement
There is no dollar or income limit on Roth conversions; the practical ceiling is the tax owed and the thresholds each conversion crosses. Conversions are taxed as ordinary income, must be completed by December 31, and are irreversible for years after 2017 (Source: IRS Notice 2025-67). For most early retirees the binding limit is not a statute but the ACA cliff before 65 and IRMAA after 65.
Sizing usually starts from a target: a chosen tax bracket, the 400% federal poverty level line for a household on marketplace coverage, or a MAGI ceiling once Medicare begins. Because there is no annual cap, the question is how much room exists below the binding threshold after counting dividends, interest, and any part-time income. Our how much to convert to Roth resource covers the trade-offs, and the December 31 Roth conversion deadline is a hard date each year.
Filling up the 12% or 22% tax bracket with conversions
A common approach is to convert just enough to reach the top of a chosen bracket after the standard deduction. For 2026 the standard deduction is $16,100 single or $32,200 married filing jointly, which means the first dollars of a conversion are absorbed before any tax applies (Source: IRS Rev. Proc. 2025-32). Bracket breakpoints change every year, so the exact fill amount is recalculated annually.
Filling the 12% or 22% bracket during the desert is the lifetime-tax-smoothing case: convert cheaply now so that required minimum distributions later do not force withdrawals at 22% or 24%. But for a pre-65 retiree on ACA coverage, the bracket is often not the binding limit. As the next section shows, the ACA subsidy phase-out can make “filling the 12% bracket” cost far more than 12% once lost premium credits are counted, so bracket targets and ACA targets have to be reconciled year by year.
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How a Roth conversion cuts your ACA subsidy before 65
Before 65, an early retiree who buys ACA marketplace coverage sets the premium tax credit off household MAGI, which includes conversion income dollar for dollar (Source: IRS Instructions for Form 8962, 2025; IRS Pub. 974, 2025). Under current law for 2026, the 400%-of-poverty subsidy cliff applies: crossing roughly $62,600 for one person or $128,600 for a family of four can forfeit the entire year’s premium credit (Source: HHS 2025 poverty guidelines).
This is a constraint that is easy to overlook. Near the cliff, one extra converted dollar can trigger the loss of a full year of premium tax credit, so the effective marginal cost of that conversion can far exceed the stated 12% or 22% income-tax rate. A retiree “filling the 12% bracket” without watching MAGI can end up paying an effective 25% to 35% or more once the clawed-back subsidy is counted. As of mid-2026 the cliff applies under current law, though legislation affecting the enhanced premium tax credits has been under discussion in Congress; current-law status warrants re-confirmation before any conversion. The two-phase table shows how the optimal conversion size shifts at 65, and our page on ACA subsidies in early retirement covers the marketplace mechanics.
| Phase | Ages | Binding limit | Illustrative conversion target | What raises the effective cost |
|---|---|---|---|---|
| Phase A: ACA years | 50-64 | 400% FPL cliff, about $62,600 MAGI for one person in 2026 | The headroom up to roughly $54,600 after about $8,000 of dividends is what a conversion can fill while staying under the cliff | Dollars near the cliff can forfeit the whole premium tax credit, raising the effective rate well above the bracket rate |
| Phase B: Medicare years | 65+ | IRMAA MAGI tiers (2-year lookback); ACA no longer applies | The room up to the first IRMAA tier is what a conversion can fill toward a target bracket | Crossing an IRMAA tier raises Medicare Part B and Part D premiums two years later |
Illustrative only. The point is that the ceiling changes character at 65: a hard ACA cliff before, a stepped IRMAA surcharge after.
IRMAA and Roth conversions once you reach 65
At 65 the ACA cliff disappears and a new constraint takes over: the income-related monthly adjustment amount (IRMAA), a surcharge on Medicare Part B and Part D premiums that kicks in above set MAGI tiers. IRMAA uses a two-year lookback, so a conversion done at 63 can raise premiums at 65. Conversion sizing after 65 aims to stay below the first tier that would apply two years out.
Because IRMAA is stepped rather than a single cliff, crossing a tier raises premiums but does not forfeit a full benefit the way the ACA cliff does. That often makes the 65-plus years a somewhat larger conversion window than the ACA-constrained years, though the two-year lookback means the transition year around 63 to 65 needs careful planning. The current tier dollar figures change annually; see our Medicare IRMAA 2026 brackets and premiums page for the tiers before a conversion is sized.
72(t) SEPP versus the Roth conversion ladder
A 72(t) substantially equal periodic payment (SEPP) is a separate penalty-free route to pre-59½ money straight from a traditional IRA, useful alongside a ladder to cover the first five years before the first rung seasons. Payments must continue for the later of 5 years or until age 59½, and modifying them triggers retroactive penalties. Three IRS-approved calculation methods apply (Source: IRS Notice 2022-6).
The ladder and the SEPP solve the same problem in different ways. A ladder gives flexible, adjustable access but only after a five-year wait per rung, so it needs a bridge fund up front. A 72(t) delivers income immediately with no five-year wait, but the payment amount is locked and rigid once started. Many early retirees use a SEPP to cover the initial bridge years while ladder rungs season, then let the ladder take over. Neither is universally preferable; the fit depends on the size of the pre-tax balance, spending needs, and how much flexibility the household wants.
Converting before RMDs begin at age 73
Every dollar converted during the desert is a dollar that will not be forced out as a required minimum distribution later. Required minimum distributions start at 73, or 75 for those born in 1960 or later from 2035, and a Roth IRA has no lifetime required minimum distributions for the original owner; Roth 401(k) lifetime RMDs were eliminated beginning 2024 (Source: SECURE 2.0 Act secs. 107 and 325).
Shrinking the pre-tax balance before 73 lowers those forced withdrawals, which can otherwise stack on Social Security and push a retiree into higher brackets late in life. There is also an heir angle: an inherited Roth generally must be emptied within 10 years, but the withdrawals are tax-free, so a Roth can spare heirs the high-bracket squeeze that an inherited traditional IRA can create. For married couples, converting during joint years can also soften the widow’s penalty, where the survivor files single and hits bracket compression. See the inherited IRA 10-year rule for how the timelines differ by beneficiary.
How Rothology plans a Roth conversion for early retirees
Rothology Roth Conversion Planning is a flat-fee, fiduciary planning service for the early-retiree case: a multi-year conversion plan, year-by-year tax projections, and annual reviews. Q3 Advisors sells no products and earns no commissions. Typical clients hold $750,000 or more in pre-tax assets. Every plan is educational and factual; conversion amounts and thresholds are modeled to the client’s own numbers, not prescribed as advice.
For an early retiree the work centers on the constraints this page describes: sequencing the bridge fund and the conversion tax, sizing each year’s conversion against the ACA cliff before 65 and IRMAA after 65, coordinating the per-conversion 5-year clocks, and modeling how conversions during the desert change required minimum distributions at 73 or 75. The service coordinates with the client’s tax preparer and revisits the plan annually as brackets, poverty guidelines, and the ACA legislative picture change. Start with our Roth conversion service overview.
Frequently asked questions
How much can I convert to a Roth each year, and is there a limit?
There is no dollar or income limit on Roth conversions. The converted amount is taxed as ordinary income, must be done by December 31 to count for that tax year, and cannot be reversed for years after 2017 (Source: IRS Notice 2025-67). This differs from the $7,500 Roth contribution limit for 2026. In practice, early retirees cap conversions at a bracket, the ACA cliff, or an IRMAA tier rather than a statutory limit.
What’s the difference between the 5-year conversion rule and the 5-year Roth account rule?
They are two clocks. The per-conversion rule sets when converted principal escapes the 10% penalty before 59½: each conversion seasons for 5 years from January 1 of its conversion year. The account-opening rule sets when earnings can come out tax-free as a qualified distribution. Withdrawing converted dollars within 5 years while under 59½ triggers the 10% recapture penalty (Source: IRS Pub. 590-B, 2025).
How much should I convert to stay in the 12% or 22% tax bracket?
The amount that reaches the top of the chosen bracket after the 2026 standard deduction of $16,100 single or $32,200 married filing jointly, counting dividends and interest already in income, is the common target (Source: IRS Rev. Proc. 2025-32). Bracket breakpoints change yearly, so the amount is recalculated each year. For a pre-65 retiree on ACA coverage, the subsidy cliff may cap the conversion below the bracket target.
Will a Roth conversion make me lose my ACA health insurance subsidy?
It can. Conversion income raises the MAGI that sets your premium tax credit dollar for dollar (Source: IRS Instructions for Form 8962, 2025). Under current law for 2026 the 400% poverty cliff applies, so crossing roughly $62,600 for one person can forfeit the whole year’s credit (Source: HHS 2025 poverty guidelines). Near the cliff, the effective cost of converting can far exceed the stated bracket rate.
Do Roth conversions affect my Medicare premiums (IRMAA) at 65?
Yes, with a delay. IRMAA surcharges on Medicare Part B and Part D use a two-year MAGI lookback, so a conversion at 63 can raise premiums at 65. After 65 the ACA cliff no longer applies, and IRMAA tiers become the sizing constraint. Because IRMAA is stepped rather than a single cliff, crossing a tier raises premiums but does not forfeit a full benefit. See our IRMAA brackets page for current tiers.
How does a Roth conversion ladder compare with a 72(t)/SEPP for early access to funds?
They serve different needs. A ladder is flexible and adjustable but locks each rung for 5 years, so it needs a bridge fund up front. A 72(t) SEPP pays immediately with no 5-year wait but the payment is fixed for the later of 5 years or age 59½, and modifying it triggers retroactive penalties (Source: IRS Notice 2022-6). Many early retirees use a SEPP to bridge the first years while ladder rungs season.
Should I do Roth conversions before or after I start Social Security?
The desert years before Social Security and required minimum distributions generally leave more room, because taxable income is lowest then. Once Social Security begins, benefits add to income and can raise the tax on both the benefit and any conversion. Required minimum distributions starting at 73, or 75 for those born in 1960 or later, add further income (Source: SECURE 2.0 Act sec. 107). Modeling the sequence is part of any conversion plan.
Sources
- IRS, Publication 590-B (2025): Roth distribution ordering rules, per-conversion 5-year rule, 10% early-distribution penalty and recapture.
- IRS, Topic no. 557: early distributions and the 10% additional tax.
- IRS, Notice 2025-67: 2026 IRA and retirement-plan contribution limits and annual figures.
- IRS, Rev. Proc. 2025-32 (announced in IRS Notice 2025-67): 2026 standard deduction ($16,100 single; $32,200 married filing jointly).
- IRS, Instructions for Form 8962 (2025) and Publication 974 (2025): MAGI definition for the premium tax credit.
- IRS, Notice 2022-6: 72(t) substantially equal periodic payments (SEPP) methods.
- SECURE 2.0 Act, secs. 107 and 325 (congress.gov): RMD age 73/75 and elimination of Roth 401(k) lifetime RMDs.
- HHS 2025 poverty guidelines: 400% FPL figures ($62,600 for one person; $128,600 for a family of four) used for 2026 marketplace coverage.