Roth Conversion for Retired Military Officers
A Roth conversion for retired military officers follows different math than it does for civilians, because a 20-year O-5 or O-6 retires in their 40s with a taxable, COLA-adjusted pension already filling the bottom tax brackets from the first month of retirement. Your conversion room is not an empty low-income valley. It is the space that remains above your pension, and that space usually shrinks fast once a second career begins.
For a retired officer, a Roth conversion is a distinct decision because military retired pay is taxable ordinary income (Source: IRS Publication 3, Armed Forces’ Tax Guide, 2026) that occupies your lower brackets on day one. Since 2026 you can also convert traditional TSP to Roth TSP inside the plan without separating (Source: tsp.gov, Roth in-plan conversions, 2026). The planning question is how much bracket room sits above your pension, and for how many years.
Why a Roth conversion for retired military officers is a different calculation
A common assumption is that retirement opens a long, low-income gap in which conversions can be made cheaply for years. A career officer rarely gets that gap, because a taxable, COLA-adjusted pension begins filling the lower brackets from the first month of retirement. Military retired pay is taxable ordinary income (Source: myArmyBenefits, U.S. Army Official Benefits, 2026), so a pension of roughly $70,000 to $100,000 already consumes the standard deduction ($32,200 married filing jointly in 2026, per IRS Rev. Proc. 2025-32) and much of the lower brackets before you convert a dollar.
Three military-only factors change the picture: combat-zone tax-exempt (CZTE) balances inside your TSP, tax-free VA disability compensation that does not raise your taxable income, and state-of-residence tax rules that shift with a permanent change of station. Each one affects how much you can convert in a given year and at what rate.
Does your military pension count toward Roth IRA income limits?
Your pension counts toward the Roth IRA contribution income limit, not the conversion limit. In 2026, Roth IRA contribution eligibility phases out between $242,000 and $252,000 of MAGI for married filing jointly and $153,000 to $168,000 for single filers (Source: IRS Notice 2025-67). A large retired-pay stream plus a second-career salary can push officers past those thresholds. Roth conversions, by contrast, have no income limit at all.
This is the point that trips up high-income retirees. The MAGI phase-out closes the door on direct Roth IRA contributions, but it never touches conversions. Any income level can convert (Source: IRS, Roth conversion rules). So an officer who is barred from contributing to a Roth IRA can still move six figures from traditional accounts into Roth through a conversion, taxed as ordinary income in the year of conversion.
TSP Roth in-plan conversion 2026: convert without separating
Starting in late January 2026, the Thrift Savings Plan allows Roth in-plan conversions directly inside the TSP (Source: tsp.gov, Roth in-plan conversions, 2026). You can move traditional TSP to Roth TSP through My Account by dollar amount or percentage without separating from service, rolling to an IRA, or leaving the plan. The converted amount is added to that year’s taxable income and taxed at ordinary rates.
Two mechanics matter for planning. There is no withholding on a TSP Roth in-plan conversion, and you cannot use the converted dollars to pay the tax, so the tax comes from outside funds and often means quarterly estimated payments (Source: tsp.gov, 2026). Converting traditional TSP to Roth TSP also removes future lifetime RMDs on that balance, since Roth 401(k) and Roth TSP lifetime RMDs were eliminated starting in 2024 (Source: IRS, SECURE 2.0 Act). For background on the plan itself, see our explainer on what a Thrift Savings Plan is.
In-plan conversion or convert traditional TSP to Roth IRA after retirement?
Both routes exist in 2026. The new in-plan conversion keeps the money inside the TSP with its low costs and creditor protections. Alternatively, you can transfer traditional TSP to a Roth IRA, which is also a taxable conversion but gives wider investment choice and no plan-level rules (Source: tsp.gov, 2026). Neither is automatically better; the choice turns on cost, investment access, and whether you want to keep TSP’s simplicity.
One caution for officers: rolling traditional TSP into a traditional IRA first can complicate a later backdoor Roth because of the pro-rata rule, covered below. If keeping the money inside the plan appeals to you, the in-plan conversion avoids that issue entirely.
Roth conversion for the high-income military retiree: your conversion runway
The low-bracket window for a retired officer is often short and front-loaded. It opens at terminal leave, may stay open through a brief post-retirement gap, then usually narrows when the second career (defense contractor, GS civilian, or consulting) stacks a full salary on top of the pension. Modeling that runway, rather than assuming a long valley, is central to high-income military retiree conversion planning.
The table below maps the typical timeline. The table is illustrative, since every officer’s second-career date and income differ.
| Phase | Typical timing | Taxable income pattern | Conversion room |
|---|---|---|---|
| Terminal leave / transition year | Year of retirement | Partial-year pension, often no second-career salary yet | Frequently widest |
| Post-retirement gap | Roughly years 0 to 2 | Pension only, possibly GI Bill schooling | Moderate to wide |
| Second career | Roughly years 2 to 20 | Pension plus full salary | Often minimal |
| Second-career retirement to age 73 | Varies | Pension, possibly part-time work | Reopens |
| After RMDs begin | Age 73 (75 for those born 1960 or later, from 2035) | Pension plus RMDs plus Social Security | Closes, higher bracket |
RMD ages are per IRS Notice 2025-67 and the SECURE 2.0 Act. The practical takeaway: the lower-rate conversion years for an officer are usually the transition year and the short gap before a second career, plus any later window between second-career retirement and age 73. See our related discussion of how much to convert to Roth.
A fill-the-bracket Roth conversion strategy for military retirees
Rather than one large lump-sum conversion, a fill-the-bracket approach converts only the amount that fits inside a chosen bracket. For an officer, that means measuring the room above your pension and other taxable income; the headroom up to a target bracket ceiling is what a conversion can fill. Spreading conversions across several low-income years can keep more of the balance in lower brackets than a single large conversion.
Here is an illustrative single-year stack for a married-filing-jointly retired officer. Figures other than the standard deduction are examples only.
| Line | Amount | Notes |
|---|---|---|
| Military retired pay (taxable) | $78,000 | Ordinary income (illustrative) |
| VA disability compensation | $24,000 | Excluded from gross income; does not count |
| Standard deduction, 2026 | minus $32,200 | Source: IRS Rev. Proc. 2025-32 |
| Taxable income before conversion | $45,800 | Pension minus deduction |
| Illustrative conversion sized to a target bracket | $40,000 | Added to ordinary income |
| Taxable income after conversion | $85,800 | Result (illustrative) |
The $24,000 of VA disability funds living costs without adding to taxable income, which leaves more bracket room for the conversion. Conversions must be completed by December 31 for that tax year and are irreversible; recharacterization of a conversion was eliminated after the 2017 Tax Cuts and Jobs Act (Source: IRS, Roth conversion rules).
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Roth conversion during deployment and combat-zone years
Deployment years can be unusually low-tax because combat-zone pay may be excluded from taxable income, leaving more bracket room for a conversion. For commissioned officers that exclusion is capped at the maximum enlisted pay rate plus any hostile-fire or imminent-danger pay, so only a portion of an officer’s pay is excluded. Conversions have no income limit, so a deployment year is one window worth modeling (Source: IRS Publication 3, Armed Forces’ Tax Guide, 2026).
The trade-off is liquidity. Because a TSP in-plan conversion has no withholding and cannot be paid from converted dollars, you need outside cash to cover the tax, which can be harder to arrange mid-deployment. In a deployment year, the conversion amount and the cash available for estimated taxes are sized together.
Combat-zone tax-exempt (CZTE) TSP conversion and the basis question
If you made combat-zone tax-exempt contributions, part of your traditional TSP is already after-tax basis. As a general principle, converting basis to Roth is not taxed again; only the associated earnings would be taxable on conversion. Important caveat: the TSP has not fully clarified how CZTE basis is handled in the new in-plan Roth conversions, so this is a point to confirm with a tax advisor before converting (Source: tsp.gov, 2026).
This is a distinctly military-specific lever. An officer with a meaningful CZTE balance may be able to convert that basis at little or no tax cost, but only if the plan tracks and applies the basis correctly. Documentation of your tax-exempt contributions matters here.
Does VA disability count toward Roth conversion income?
No. VA disability compensation is excluded from gross income under 26 U.S.C. section 104(a)(4); it is not taxed federally, not reported on your return, and generates no 1099 (Source: IRS, Veterans tax information and services, 2026). Because it is not taxable, it does not raise your taxable income or your MAGI. An officer who funds part of living costs with VA disability therefore keeps more taxable-bracket headroom available for conversions.
This exclusion applies regardless of your disability rating percentage (Source: IRS veterans page, 2026). It is one reason a retired officer’s usable conversion room can be larger than their gross cash flow suggests: a chunk of household income never touches the tax return.
State tax on a military pension Roth conversion
A Roth conversion is taxable at the state level in most states that tax income, and the converted amount is generally taxed by your state of residence in the conversion year. State treatment of military retired pay and conversions varies widely; some states fully exempt military pensions, others tax them, and rules change with a permanent change of station. Converting while domiciled in a lower-tax state can change the after-tax result.
Because per-state rules differ and can be age-gated, the applicable rules are those of the officer’s state of residence, as published by that state’s revenue department, in the conversion year. If a PCS or post-retirement move to or from a no-income-tax state is on the horizon, the timing of a conversion relative to that move can matter as much as the federal math.
Will a Roth conversion raise IRMAA for a military retiree?
It can, once you are near Medicare age. Converted amounts add to MAGI, and Medicare uses a two-year MAGI lookback to set income-related monthly adjustment amounts (IRMAA) on Part B and Part D premiums. A large conversion at age 63 or later can therefore raise premiums two years afterward. VA disability does not count toward that MAGI, which gives military retirees some hidden headroom civilians lack.
For officers converting in their early-to-mid 40s, IRMAA is years away and rarely the binding constraint. It becomes the ceiling only as you approach 65. For the current-year thresholds and how the lookback works, see our guide to the 2026 Medicare IRMAA brackets and premiums.
Backdoor Roth for military officers over the income limit
An officer whose pension plus second-career salary exceeds the Roth IRA contribution phase-out ($242,000 to $252,000 MFJ in 2026, per IRS Notice 2025-67) can still fund a Roth through the backdoor: contribute to a nondeductible traditional IRA, then convert it. The catch is the pro-rata rule, which aggregates all your pre-tax IRA balances when calculating the taxable portion of the conversion.
This is where a common officer move backfires. If you rolled your traditional TSP into a traditional IRA at retirement, that pre-tax balance makes a backdoor Roth largely taxable under aggregation. Keeping pre-tax dollars inside the TSP, or converting them fully, avoids that. See our detailed explanation of the pro-rata rule in Roth conversions.
Mega backdoor Roth, the TSP, and your second-career 401(k)
The mega backdoor Roth relies on after-tax (non-Roth) contributions up to the 415(c) total additions limit of $72,000 in 2026 (Source: IRS Notice 2025-67), then converting them. The TSP does not currently offer a separate after-tax non-Roth contribution bucket, so this generally runs through a civilian employer 401(k), which many officers gain in a second career, rather than through the TSP itself.
For a still-serving or dual-income officer, also note SECURE 2.0 section 603: starting in 2026, catch-up contributions for higher earners (prior-year FICA wages above roughly $145,000, a base figure that is indexed) must be made as Roth (Source: IRS, SECURE 2.0 Act). The exact 2026 indexed threshold, rather than a fixed number, is the figure that applies.
The survivor angle: SBP and the widow’s tax trap
The Survivor Benefit Plan is not a convertible account, but it interacts with Roth strategy. SBP premiums are withheld from retired pay before tax, which slightly lowers current taxable retired pay and marginally increases conversion room (Source: DFAS; U.S. Army Soldier for Life, SBP and Taxes). The SBP annuity paid to a survivor is taxable ordinary income reported on Form 1099-R (Source: DFAS, 2026).
The planning implication: a surviving spouse who later files single faces narrower brackets on both the taxable SBP annuity and any inherited traditional TSP or IRA RMDs. Converting to Roth during the couple’s joint-filing years can reduce that later burden. We cover this dynamic in our article on the widow’s penalty.
How Rothology plans Roth conversions for retired military officers
Rothology Premier Roth Conversion is a flat-fee, fiduciary planning service from Q3 Advisors. For a retired officer, the work centers on mapping your conversion runway, modeling CZTE basis, VA disability headroom, and state residency, and building a multi-year conversion plan with tax projections and annual reviews. Q3 Advisors is a fiduciary and sells no products. Typical clients hold $750,000 or more in pre-tax assets.
The engagement begins with an educational conversation, not a sales pitch. Planning is coordinated with your tax preparer, and any conversion figures are modeled to your actual pension, second-career timeline, and residency. You can review the broader framework on our Roth conversion service page.
Frequently asked questions
Can I convert my traditional TSP to Roth without separating from the military?
Yes. Starting in late January 2026, the TSP offers Roth in-plan conversions, so you can move traditional TSP to Roth TSP through My Account on tsp.gov without separating, rolling to an IRA, or leaving service (Source: tsp.gov, 2026). The converted amount is taxed as ordinary income that year, there is no withholding, and the tax is paid from outside funds.
Should I do a Roth conversion in the year I retire from the military?
The transition year is often one of the lower-income windows, because you may have only partial-year pension and no second-career salary yet, which can leave more bracket room. Whether converting then fits depends on your full-year income, cash available for the tax, and any planned second career. Modeling the specific year with a tax advisor is generally worthwhile before converting.
Can I still get money into a Roth if my pension puts me over the income limit?
Yes. The income phase-out ($242,000 to $252,000 MFJ in 2026, per IRS Notice 2025-67) limits Roth IRA contributions only, not conversions. You can convert traditional balances at any income level, and you may also use a backdoor Roth by making a nondeductible traditional IRA contribution and converting it, subject to the pro-rata rule if you hold other pre-tax IRA money.
How much of my traditional TSP should I convert each year?
There is no single figure. A fill-the-bracket approach converts only the amount that fits within a target tax bracket after accounting for your pension and other taxable income, and repeats that across your low-income years. The right annual amount depends on your bracket, cash for the tax, IRMAA proximity, and how many low-bracket years remain before a second career or RMDs. Modeling with an advisor is prudent.
Is it better to do an in-plan TSP Roth conversion or roll the TSP into a Roth IRA?
Both are taxable conversions with the same income treatment. The in-plan route keeps money inside the TSP with its low costs and protections; a Roth IRA offers wider investment choice (Source: tsp.gov, 2026). Neither is universally preferable. Rolling to a traditional IRA first can complicate a later backdoor Roth via the pro-rata rule, which is a factor worth weighing.
Will a Roth conversion push up my IRMAA Medicare premiums as a military retiree?
It can once you are within about two years of Medicare age, because converted amounts raise MAGI and IRMAA uses a two-year lookback to set Part B and Part D premiums. VA disability does not count toward that MAGI. For officers converting in their 40s, IRMAA is usually years away and not the binding limit, becoming relevant nearer age 65.
Sources
- IRS Notice 2025-67 (2026 contribution, deduction, and phase-out figures); SSA
- tsp.gov, Roth in-plan conversions, and TSP Bulletin (2026)
- IRS Publication 3, Armed Forces’ Tax Guide (2026)
- IRS, Veterans tax information and services; 26 U.S.C. section 104(a)(4)
- myArmyBenefits, U.S. Army Official Benefits (2026)
- DFAS and U.S. Army Soldier for Life, SBP and Taxes
- IRS, SECURE 2.0 Act (RMD ages, Roth catch-up rule, Roth 401(k)/TSP lifetime RMD elimination)