High-36 Military Retirement: How Promotions Affect Your Retirement Pay

The most expensive misunderstanding in military retirement math is also the most common: that your retired pay is a percentage of your final paycheck. It is not. For everyone who joined after September 7, 1980, retired pay is a percentage of an average — the average of your highest 36 months of basic pay, priced month by month at the grade and longevity step you actually held in each month. A promotion inside those 36 months helps, but only for the months after it happens. This article shows exactly how that works, with four worked examples priced from official pay tables.

Last factually verified: November 1, 2026. Pay tables: 2023–2026 basic pay tables as cited in Sources. If you spot an error, contact us and verified corrections will be published with a note.

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The short version

The whole calculation fits in two steps:

Step 1 — the base: add up the monthly basic pay for your highest 36 months, and divide by 36. The result, rounded to the nearest cent, is your retired pay base.

Step 2 — the pension: multiply the base by your retirement percentage, and round down to the next whole dollar. That is your gross monthly retired pay, before any VA waiver, taxes, SBP premium, or other deduction.

Under the legacy system the percentage is 2.5% per year of creditable service (50% at 20 years, 75% at 30 years). Under the Blended Retirement System (BRS) it is 2.0% per year (40% at 20 years, 60% at 30 years). The base is computed the same way under both systems; only the percentage differs. Everything else in this article is about getting Step 1 right, because that is where promotions, longevity steps, and pay-table changes actually bite.

What the High-36 base actually averages

The statute is 10 U.S.C. 1407. For regular service, the base is "the total amount of monthly basic pay to which the member was entitled for the 36 months (whether or not consecutive) out of all the months of active service of the member for which the monthly basic pay to which the member was entitled was the highest, divided by 36." The DoD Financial Management Regulation (FMR), Volume 7B, Chapter 3, paragraph 2.1.1.2.1, states the same rule as an instruction: start with the highest rate of pay, add monthly basic pay amounts until you reach 36 months, divide by 36, and round to the nearest cent. Only months during which the person was a member of a uniformed service may be used, and lost time is not included.

Four consequences follow, and each one matters for the examples:

• Basic pay only. Housing allowance (BAH), subsistence allowance (BAS), special and incentive pays, and bonuses are never in the base. A month with high total cash compensation but ordinary basic pay contributes only its basic pay.
• Highest 36, not necessarily final 36. The 36 months need not be consecutive. In practice, for a member whose pay rises steadily through promotions, longevity steps, and annual raises, the final 36 months are the highest 36 — and all four examples below are built that way, with that assumption stated. But if pay fell during the window (for example after a reduction in grade), the highest 36 could include earlier, higher-paid months. There is also a statutory exception for certain reductions in grade: under 10 U.S.C. 1407(f), some members reduced in grade have their base recomputed under the Final Pay rules instead of the ordinary High-36 average.
• Month by month, at the rate actually in effect. Each month is priced at the grade and longevity column in effect for that month, on that year's pay table. A promotion does not reprice earlier months, and a new year's pay table does not reprice earlier years.
• A mid-month change splits the month. FMR paragraph 2.1.1.2.3 provides that a full month counts as one month regardless of a mid-month pay change, but a calendar month with more than one basic-pay rate is computed by days paid at each rate on a 30-day-month basis, ignoring the 31st day. The FMR's own illustration: a longevity increase effective February 11 means the old rate applies for 10 days and the new rate for 20 days, leap year or not. A promotion or longevity step on the 15th of a month therefore prices that month as 14 days at the old rate and 16 days at the new rate. Examples A, B, and C below each contain such a split month, worked out in full.

Why your final rank's pay is not your base

Suppose you retire as an E-7. Your final month's basic pay might be $6,475.20 (the 2026 E-7 rate at over 22 years). It is tempting to compute 55% of $6,475.20 and call it your retired pay. That calculation uses one month's rate for all 36 months, and it overstates the base by every month you spent at a lower grade, a lower longevity step, or an older pay table. In Example A below, that shortcut overstates gross retired pay by $361 a month. In Example C, where the promotion comes six months before retirement, it overstates it by $764 a month.

There is a second distinction worth keeping separate, because confusing it causes real errors. Retired grade and retired pay base are two different determinations. For commissioned officers, retired grade is governed by 10 U.S.C. 1370: generally, the highest grade in which the officer served on active duty satisfactorily, as determined by the service secretary, for not less than six months (subsection (a)(1)). But subsection (a)(2) adds a service-in-grade requirement for voluntary retirement in a grade above major or lieutenant commander: the officer must have served on active duty in that grade for not less than three years, although the Secretary of Defense may authorize a reduction to not less than two years, and the President may waive the requirement in individual cases of extreme hardship or exceptional circumstances. An officer who does not meet the requirement is retired in the next lower grade served satisfactorily for not less than six months (subsection (b)). The examples in this article are enlisted members, not officers — but the distinction holds for them exactly the same way: the grade on the retirement order does not reprice the 36 months. The retired pay base is the 36-month average described above, whatever grade the member retires in. Conversely, an officer retired in a lower grade after an unsatisfactory-service determination can fall under the 1407(f) exception noted above, where the base is recomputed under Final Pay rules rather than the ordinary average. Do not assume the final grade is automatically the grade that prices the whole base — the base is arithmetic over months, not a grade label.

How longevity steps reprice your months

Basic pay tables are organized by grade and by cumulative years of service: columns labeled "Over 2," "Over 4," "Over 6," and so on up to "Over 40." As your years of service grow, you move to higher columns at the same grade, and each move raises your monthly basic pay — even with no promotion at all. A 36-month window almost always crosses at least one longevity threshold, so part of the window is priced at the old column and part at the new one.

Example A's April 2024 month shows the mechanics. The member completes 20 years on April 15, 2024, moving from the E-7 "Over 18" column to the "Over 20" column. On the 30-day-month convention, April prices as 14 days at the old 2024 rate and 16 days at the new one:

(14 × $5,694.90 + 16 × $5,757.90) ÷ 30 = $5,728.50 for April 2024.

Neither the old rate nor the new rate alone is the month's figure. The same split applies in April 2026, when the member completes 22 years: (14 × $6,245.70 + 16 × $6,475.20) ÷ 30 = $6,368.10. Any reconstruction that prices whole months at a single column — including this site's own estimator, discussed below — will differ from the DFAS figure by these split months.

How annual pay-table changes reprice your months

Basic pay tables change every January 1, when the annual military pay raise takes effect. The general raises across the examples' window were 4.6% in 2023, 5.2% in 2024, 4.5% in 2025, and 3.8% in 2026 (by statute, 37 U.S.C. 1009, the annual adjustment is linked to the Employment Cost Index unless the President or Congress sets a different figure). Each month in a High-36 window is therefore priced on its own year's table: a month in 2023 uses the 2023 table, a month in 2025 uses the 2025 table, and so on.

That is why a current-year estimate differs from a historical reconstruction. Taking today's rate and multiplying by 36 assumes every month was paid at today's table. It was not. It also assumes every past table can be recovered by deflating today's table by the general raise percentages. That is close for senior enlisted grades, but it is not exact: DFAS publishes each year's table as its own set of cells, and a deflated cell can differ from the published cell by cents — and, for junior enlisted grades in 2025, by much more, because of the targeted raise described next.

The April 2025 targeted raise, and why percentages mislead

On April 1, 2025, junior enlisted pay was restructured by the FY2025 National Defense Authorization Act (P.L. 118-159, §601). Section 601 does not state a percentage: it enacts the April 1, 2025 pay table itself, cell by cell, effective April 1, 2025. The January 1, 2025 general raise of 4.5% applied to everyone; the April table added a targeted increase on top of it for junior enlisted members only: E-1 through E-4, and E-5s with fewer than 10 years of service (whose table was restructured cell by cell, averaging roughly 7% more, not a flat 7% for every E-5 — §601's own table shows E-5 at Over 8 years at $4,142.40, while the Over 10 and higher columns sit flat at $4,259.70, confirming the restructure reached only the under-10-year columns). Members at E-6 and above, warrant officers, and commissioned officers received only the January general raise.

The April change was a pay-table amendment, not a percentage instruction — and that distinction matters for anyone reconstructing a 2025 window. A 36-month window spanning April 2025 for a junior enlisted member must use two different 2025 rates: the January table for January–March and the April table for April–December. For example, an E-4 at over 6 years was paid $3,341.40 a month on the January 2025 table and $3,675.60 on the April 2025 table. Secondary summaries variously describe that change as "an additional 10%," as a "10.5% total," and as "14.5%." None of those shorthands is exact: the January-to-April step for this cell is $334.20 on $3,341.40 (about 10.0%), and adding 4.5% and 10% gives 14.5% only as arithmetic shorthand, not as the compounded change over 2024 rates (1.045 × 1.10 ≈ 1.1495, about 15%). The table cells govern; the percentages are characterizations. The worked examples below use E-6 and E-7, which the April 2025 targeted change did not touch — that is stated here so nobody assumes otherwise — but any junior-enlisted reconstruction spanning April 2025 must split the year.

How the multiplier applies to the base

Once the base is fixed, the multiplier is straightforward — with three qualifications:

• Legacy: 2.5% per year. Under 10 U.S.C. 1409(b)(1), the percentage is 2.5 multiplied by years of creditable service. At 20 years that is 50%; at 30 years, 75%. For retirements after December 31, 2006, there is no 75% cap: each year past 30 adds another 2.5% (1409(b)(3)(B)).
• BRS: 2.0% per year. Under 1409(b)(4), a member who first joined on or after January 1, 2018, or who validly elected BRS, uses 2 instead of 2.5: 40% at 20 years, 60% at 30 years. The election was limited to members serving on December 31, 2017, with fewer than 12 years of service as of that date (1409(b)(4)(B)) — a limit that matters for Example D below. BRS became effective January 1, 2018 (FY2016 NDAA, P.L. 114-92, §§631–635, as amended). TSP savings under BRS are separate money on top of the annuity and are not part of this calculation.
• Partial years and rounding. For retirements on or after October 1, 1983, credit is given for each full month and partial months are disregarded, and the percentage is rounded to the nearest 1/100 of a percentage point (FMR paragraph 2.8.4; its illustration: 20 years 7 months = 20.58 years × 2.5% = 51.45%). Gross retired pay is then rounded down to the next whole dollar (FMR paragraph 2.9.1). Every example below follows that rounding chain: base to the nearest cent, percentage to the nearest hundredth of a point, gross down to the dollar.

Two systems this article does not model: REDUX / Career Status Bonus retirements (a reduced multiplier for members who accepted the bonus, restored at age 62) and Chapter 61 disability retirements (whose computation can exceed the longevity amount). If either applies to you, these examples are not your formula.

When Final Pay applies instead

Members who first became members of a uniformed service before September 8, 1980, are under Final Pay (10 U.S.C. 1406): the base is the monthly basic pay of the retired grade on the day before retirement (for regular retirements), not an average at all. For those members, a late promotion does reprice the whole base, because there is only one month's rate in it — which is precisely why the pre-1980 system rewarded "topping out" at a higher grade, and why the post-1980 High-36 system does not. Everyone who joined after September 7, 1980, is under High-36 (10 U.S.C. 1407), and the rest of this article is about them. With the last Final Pay retirements decades behind us, virtually every member retiring today is under High-36.

How Reserve and Guard retirement differs

For non-regular (Reserve/Guard) retirees, the base rule is the same average — but two things change, and confusing them is the most common Reserve error:

• The base uses full monthly basic pay, not drill pay. Under 10 U.S.C. 1407(d)(1), the non-regular base is the total monthly basic pay the member was entitled to during the high-36 months — or would have been entitled to if the member had served on active duty during the entire period — divided by 36. Drill weekends and annual training affect the multiplier through points, never the monthly base figure. A Reserve month counts at the full monthly rate for its grade and longevity column, exactly as an active-duty month would.
• The multiplier uses equivalent years, not calendar years. Under 10 U.S.C. 12733, equivalent years equal total retirement points divided by 360, carried to three decimals and rounded to two (FMR paragraph 2.5.2's illustration: 4,735 points ÷ 360 = 13.152, or 13.15 years). Twenty qualifying years under 10 U.S.C. 12732 (anniversary years at 50+ points each) decide eligibility; points ÷ 360 decide how much. And retired pay does not start at 20 years: it starts at the eligibility age, generally 60, reduced by 3 months per aggregate 90 days of qualifying active service after January 28, 2008, never below 50 (10 U.S.C. 12731(f)).

One further Reserve distinction, from FMR paragraph 2.5.1: the high-36 months are the 36 highest months before the member becomes entitled to retired pay, whether or not consecutive. A member who transfers to the Retired Reserve has the base priced on the months preceding receipt of pay; a member who instead elects discharge to civilian status while awaiting pay at the eligibility age has the base drawn only from months before that discharge. The two paths can therefore produce different bases for the same career, and the choice between them is worth understanding before it is made. Gross non-regular retired pay is likewise rounded down to the whole dollar (10 U.S.C. 12739(d)).

The worked examples: shared assumptions

All four examples use the same hypothetical member profile so the comparisons are clean: enlisted April 15, 2004, retires April 30, 2026, with 22 years of creditable service, no lost time, no reduction in grade, no Career Status Bonus, and no SBP premium in the gross figures. Because the member's pay rises through the whole window — longevity steps, annual raises, and (in Examples B and C) a promotion — the final 36 months are also the highest 36, so the window below is the High-36 window. Example D reuses Example A's pay history as an illustrative multiplier comparison only; the member entered in 2004 and could not have elected BRS (see Example D). Rates are published DFAS and executive-order cells: 2023 (E.O. 14090), 2024 (E.O. 14113), 2025 (E.O. 14132, and the April 1, 2025 table enacted in FY2025 NDAA §601), and 2026 (DFAS table, effective January 1, 2026). Split months use the FMR 30-day convention: 14 days at the old rate, 16 days at the new rate, for a change effective the 15th. Figures are gross monthly retired pay at retirement, before any VA waiver, tax, or deduction.

Example A — No promotion: longevity steps and pay-table changes alone

The member serves as an E-7 for the entire 36 months, May 2023 through April 2026. Even with no promotion, the base is far below the final month's rate, because 20 of the 36 months sit on older tables and lower longevity columns, and two months are split by longevity steps.

The naive shortcut — 36 months at the final rate of $6,475.20 — would give a base of $6,475.20 and gross retired pay of $3,561 a month. The correct reconstruction is $361 a month lower. The entire difference is time: months already lived at lower rates cannot be repriced at today's rate.

Example B — Promotion 24 months before retirement

Same member, same retirement date, but promoted from E-6 to E-7 effective May 1, 2024 — 24 months before retirement. The window is 12 months at E-6 and 24 months at E-7. (E-6 rates are flat from Over 18 onward, so the member's completion of 20 years in April 2024 changes nothing on the E-6 side.)

Two comparisons put the promotion in perspective. Had the member stayed E-6 for all 36 months, the base would be $4,921.57 and gross retired pay $2,706 a month — so the promotion, even arriving two years before retirement, is worth $345 a month for life. But had the member been E-7 for the whole window (Example A), gross retired pay would be $3,200 — so the 12 E-6 months cost $149 a month against the all-E-7 case. A promotion's value in retired pay is proportional to the months it covers, not to the grade itself.

Example C — Promotion 6 months before retirement

Same member again, but promoted from E-6 to E-7 effective November 1, 2025 — only 6 months before retirement. Thirty of the 36 months remain at E-6 rates.

This is the case the final-paycheck shortcut gets most wrong. Pricing all 36 months at the final E-7 rate would promise $3,561 a month; the actual figure is $2,797 — a $764-a-month overstatement. It is also the case that best answers the question "should I delay retirement to let a promotion season?" Moving the same promotion 18 months earlier (Example B) raises gross retired pay from $2,797 to $3,051, or $254 a month — a real, permanent difference that comes entirely from how many of the 36 months the new grade covers. Note also that a promotion this late still raises retired pay over staying E-6 ($2,797 vs $2,706): late is worth less, not worthless.

Example D — Legacy vs BRS on the same pay history (illustrative comparison)

Take Example A's pay history — base $5,819.30 — and price it under each multiplier. Read this example as an illustration, not as this member's two possible retirements. The member in Examples A–C entered in April 2004. BRS covers members who first joined on or after January 1, 2018, or who validly elected it, and the election was limited to members with fewer than 12 years of service on December 31, 2017. This member had more than 13 years of service by then, so he could not have elected BRS; his actual system is legacy. The BRS column below therefore shows what the same base would yield under the BRS multiplier for a BRS-covered member with an identical pay history — it is a multiplier comparison, not a claim that this member could choose either column. Nothing else changes between the columns: same 36 months, same base, same service. Only the percentage differs.

At 22 years, BRS pays $640 a month less in retired pay on the identical history — the price of the system's other half, which is TSP: automatic 1% agency contributions plus matching contributions, and a continuation-pay payment, none of which appear in the retired-pay figure. The gap scales with service: at 20 years on this base, legacy pays $2,909 against BRS $2,327 (a $582 gap); at 30 years, legacy pays $4,364 against BRS $3,491 (an $873 gap). Those 20- and 30-year figures are not three separate careers or three reconstructed histories: the $5,819.30 base is held constant and only the multiplier changes, solely to show how the two systems price the same base at different service lengths. A real 20-year retiree would have a different 36-month history from a real 30-year retiree, and neither would match Example A's history exactly. For a non-regular retiree the same comparison holds with equivalent years: points ÷ 360 × 2.5% (legacy, 10 U.S.C. 12739(a)) versus points ÷ 360 × 2.0% (BRS, 12739(f)(1)). A BRS-vs-legacy comparison that only looks at the monthly annuity, without the TSP balance it took years to build, is half a comparison — but the annuity half is exactly what this table shows, and it is the half DFAS pays every month for life.

Why a current-year estimate differs from a historical reconstruction: estimator limitations

This site's retirement calculator offers an optional rank estimator for members who do not yet have a DFAS High-36 figure. It is labeled an estimate everywhere it appears, and this article documents precisely where it differs from the reconstructions above, rather than leaving the difference to be discovered:

• Deflated tables instead of published cells. The estimator takes the 2026 DFAS table and deflates earlier years by the general raises (2026 3.8%, 2025 4.5%, 2024 5.2%). The examples above use each year's published cells. For the E-6/E-7 histories here the gap is small but real: the estimator gives $5,823.06 for Example A's profile against the reconstructed $5,819.30 (gross $3,202 vs $3,200); $5,551.00 against $5,548.07 for Example B (gross $3,053 vs $3,051); and $5,088.92 against $5,085.98 for Example C (gross $2,798 vs $2,797). The estimator reads a few dollars high in all three cases, because deflated cells run slightly above the published cells and because of the next point.
• Whole months instead of split months. The estimator prices each month at one grade and one longevity column (completed years, floored). It does not split a transition month by days at each rate, as FMR paragraph 2.1.1.2.3 requires. The two split months in Examples A–C are therefore priced slightly differently by the estimator than by DFAS.
• One promotion, and no targeted-raise modeling. The estimator models at most one promotion in the window and assumes the previous rank for the rest of it; more ranks, or a demotion, and it refuses rather than guessing. It does not model the April 2025 targeted raise month by month: the calculator page itself warns that months before April 1, 2025 at grades E-1–E-4 are overstated by about 10% in the estimate, and that the E-5 restructuring is likewise not modeled. For junior enlisted members, that warning is the largest single estimator gap, and it is why the manual-entry option exists.

None of this is a defect in the estimator — it is the disclosed cost of estimating without a member's actual pay history. But it is why the calculator page says a manual DFAS figure always wins over the estimate, and why this article's examples are reconstructions from published tables rather than estimator outputs. No calculator engine or rate table was changed to produce this article, and the estimator's method is unchanged.

What to do with this

If you are planning a retirement, the actionable version of this article is short. First, get your actual High-36 figure from DFAS or from your own pay records, month by month — do not accept a final-paycheck percentage as a plan. Second, if a promotion is in prospect, count the months it will cover inside your final 36: that count, multiplied by the monthly grade difference and divided by 36, is roughly what the promotion is worth in your base (Examples B and C show the exact arithmetic for E-6 to E-7). Third, if you are Guard or Reserve, separate your two numbers — qualifying years for eligibility, points ÷ 360 for the multiplier — and confirm whether your base will be priced at pay-start-era rates or frozen at discharge-era months before you choose a path. Fourth, if you are BRS, remember the annuity comparison is only half the system: the TSP balance is the other half, and it is not in any retired-pay figure on this site.

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Sources

• 10 U.S.C. 1407 (retired pay base: High-36 average; non-regular base at full monthly rates; reduction-in-grade exception at subsection (f)).
• 10 U.S.C. 1406 (Final Pay for members who first joined before September 8, 1980).
• 10 U.S.C. 1409 (multiplier: 2.5% legacy at (b)(1); 2.0% BRS at (b)(4); post-2006 uncapped accrual at (b)(3)(B)).
• 10 U.S.C. 1370 (retired grade for commissioned officers: highest grade served satisfactorily for not less than six months at (a)(1); three-year service-in-grade requirement above major/lieutenant commander at (a)(2), reducible to two years by the Secretary of Defense; lower-grade fallback at (b)).
• 10 U.S.C. 12731, 12732, 12733, 12739 (non-regular eligibility age and reduced-age rule; qualifying years; points ÷ 360; non-regular multiplier and rounding).
• DoD Financial Management Regulation, Volume 7B, Chapter 3 (October 2025): retired pay base at ¶2.1.1.2.1; mid-month splits at ¶2.1.1.2.3; multipliers at ¶2.1.2; non-regular computation at ¶2.5; percentage rounding at ¶2.8.4; gross rounding down at ¶2.9.1.
• DFAS 2026 basic pay table, effective January 1, 2026 (DoD FMR Vol. 7A, Ch. 1): DFAS — Basic Pay, Enlisted.
• Executive Order 14090, Schedule 8 (2023 table, effective January 1, 2023); Executive Order 14113, Schedule 8 (2024 table); Executive Order 14132, Schedule 8 (January 2025 table); Executive Order 14368, Schedule 8 (2026 table).
• DFAS April 1, 2025 active-duty pay table (targeted junior-enlisted change); FY2025 NDAA, P.L. 118-159, §601 (enacts the April 1, 2025 table itself, effective April 1, 2025; E-4 Over 6 $3,675.60; E-5 Over 8 $4,142.40, Over 10+ $4,259.70).
• Congressional Research Service, "Defense Primer: Military Pay Raise" (IF10260, updated January 26, 2026) — annual raise mechanism (37 U.S.C. 1009) and historical percentages; and "FY2025 NDAA: Military Basic Pay Reform Proposal" (IN12367, December 30, 2024).
• FY2016 NDAA, P.L. 114-92, §§631–635 (BRS authorization; effective January 1, 2018).

Frequently asked questions

What is High-36 retirement pay, and how is it calculated?
For members who first joined after September 7, 1980, the retired pay base is the average of the highest 36 months of basic pay received (10 U.S.C. 1407). Gross retired pay is that base multiplied by the retirement percentage — 2.5% per year under legacy, 2.0% under BRS — rounded down to the next whole dollar.

How does a promotion inside the last 36 months change my High-36 average?
Only the months served at the new grade count at the new grade's pay. A promotion 24 months before retirement reprices 24 of the 36 months; a promotion 6 months before retirement reprices only 6. The final grade's current pay is never applied to all 36 months.

Do BAH and BAS count toward High-36?
No. The base uses basic pay only — never housing allowance, subsistence allowance, special pays, or bonuses.

What is the difference between Final Pay and High-36?
Final Pay (pre-September 8, 1980 joiners, 10 U.S.C. 1406) uses the retired grade's basic pay on the day before retirement. High-36 (post-September 7, 1980 joiners, 10 U.S.C. 1407) averages the highest 36 months of basic pay.

How is the Blended Retirement System multiplier different from legacy High-36?
Legacy pays 2.5% per year (50% at 20 years, 75% at 30 years); BRS pays 2.0% per year (40% at 20 years, 60% at 30 years). BRS covers members who first joined on or after January 1, 2018, or who validly elected it; the election was limited to members with fewer than 12 years of service on December 31, 2017. The base is computed identically; only the multiplier differs, and BRS TSP savings are separate money on top of the annuity.

How does High-36 work for Guard and Reserve retirees?
The base is still the average of the highest 36 months of monthly basic pay at full monthly rates — not prorated drill pay. The multiplier uses equivalent years (points ÷ 360), and retired pay starts at the eligibility age, generally 60.

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