After exactly 20 years of qualifying active service, standard High-36 retirement pays 50% of your highest-36-month average basic pay. Under the Blended Retirement System (BRS), the pension pays 40% of that average. These are gross amounts, before deductions. Neither percentage applies to your entire military compensation package.
For an illustrative $5,000 monthly retirement pay base, the calculation produces $2,500 a month under High-36 or $2,000 under BRS. Your actual result depends on your retirement system, creditable service and pay history.
This guide covers regular active-duty longevity retirement. It does not calculate Reserve or National Guard non-regular retirement, disability retirement, Final Pay or CSB/REDUX. All examples assume no BRS lump-sum election and are explanations of the formula, not personalized benefit estimates. Official retirement-plan overview.
How to calculate military retirement pay after 20 years
The standard monthly calculation is:
Gross monthly retired pay = retirement pay base × years of creditable service × annual multiplier.
For the two systems compared here, the retirement pay base is the average of your highest 36 months of basic pay. High-36 uses a 2.5% annual multiplier; BRS uses 2%. Military OneSource explains the High-36 calculation, and FINRED confirms the BRS defined-benefit formula.
| Calculation at exactly 20 years | High-36 | BRS pension |
|---|---|---|
| Annual multiplier | 2.5% | 2% |
| Service multiplier | 20 × 2.5% = 50% | 20 × 2% = 40% |
| Illustrative monthly retirement pay base | $5,000 | $5,000 |
| Gross monthly pension | $2,500 | $2,000 |
| Gross annual pension, monthly amount × 12 | $30,000 | $24,000 |
Author-calculated illustration using official formulas. Dollar amounts are hypothetical; they are not an average military pension or an official quote. Annual totals assume 12 payments at the displayed rate.
The $500 monthly difference in this example compares pensions only. It does not compare the entire value of the two retirement systems: BRS also has a separate savings component.
Before calculating, confirm the plan on your service record. If your record says Final Pay or CSB/REDUX, use that system's rules rather than substituting the High-36 or BRS formula above.
Does “50% of pay” include housing and food allowances?
The formula uses basic pay, not the full amount you receive while serving. Do not put your total monthly compensation or bank deposit into the retirement pay base.
Housing allowance (BAH), subsistence allowance (BAS), bonuses and other compensation are not interchangeable with basic pay. Identify the basic-pay line in your pay records and use that amount when reconstructing the average. The Military OneSource military-pay guide distinguishes basic pay from allowances and other payments.
This matters for your budget. A pension worth half of average basic pay can replace substantially less than half of the compensation you were using to cover household expenses. Compare the pension with your actual retirement spending, rather than assuming “50%” describes your total income replacement.
Why your current pay grade does not give the complete answer
A current military pay table shows a rate for a particular grade and length of service. It does not establish your historical 36-month average.
Your pay may have changed during the period because of promotions, additional service or annual pay-table changes. Use the relevant monthly amounts rather than multiplying today's rate by 50% or 40% and treating the result as exact.
Here is a simplified example of a highest-36-month period:
| Hypothetical period | Months | Monthly basic pay | Sum for that period |
|---|---|---|---|
| First block | 12 | $4,000 | $48,000 |
| Second block | 12 | $5,000 | $60,000 |
| Third block | 12 | $6,000 | $72,000 |
| Total | 36 | — | $180,000 |
Average = $180,000 ÷ 36 = $5,000 per month.
These blocks illustrate the averaging process. They are not historical military pay rates, a promotion forecast or a claim that every member's highest months form these three equal blocks.
Use the official military retirement calculators for a projection that fits your service record. The USAGov military-pay page links to official pay charts if you need to check a basic-pay rate.
Monthly pension examples at 20 years
The following table lets you see the formula at different hypothetical average basic-pay amounts. It intentionally does not label the amounts E-7, O-5 or another rank: a grade alone cannot establish the required average.
| Highest-36-month average basic pay | High-36: monthly / annual | BRS pension: monthly / annual |
|---|---|---|
| $4,000 | $2,000 / $24,000 | $1,600 / $19,200 |
| $5,000 | $2,500 / $30,000 | $2,000 / $24,000 |
| $6,000 | $3,000 / $36,000 | $2,400 / $28,800 |
Calculated examples at exactly 20 creditable years, before deductions, with no BRS lump-sum election. Annual figures equal monthly figures multiplied by 12; no future increase is assumed.
These figures answer “what does this formula produce?” They do not establish what a typical retiree receives or guarantee what your service will approve.
What changes if you serve longer than 20 years?
The service multiplier increases with additional creditable service. Holding the illustrative monthly pay base at $5,000 shows that effect separately:
| Creditable service | High-36 multiplier | High-36 monthly pension | BRS multiplier | BRS monthly pension |
|---|---|---|---|---|
| 20 years | 50% | $2,500 | 40% | $2,000 |
| 22 years | 55% | $2,750 | 44% | $2,200 |
| 25 years | 62.5% | $3,125 | 50% | $2,500 |
These are whole-year examples. The pay base is deliberately held constant; an actual longer career may change both service credit and the pay base. Verify the credited years and months with your service.
Do not read this as a recommendation to remain in service for a particular number of years. It isolates one calculation input so you can understand an official estimate.
How does the BRS Thrift Savings Plan fit in?
The BRS pension and the Thrift Savings Plan are different components. The pension formula does not turn your TSP balance into additional monthly retired pay automatically.
Keep two separate entries in your retirement plan: the pension estimate and your savings-account balance. Any projected TSP withdrawals require their own assumptions and applicable withdrawal rules. This article does not assume investment returns or convert a hypothetical account balance into guaranteed income. See the official BRS overview and TSP overview.
Is the gross pension the amount deposited in your account?
No. Gross retired pay and spendable income are different numbers.
Military retirement pay based on age or length of service is taxable pension income for federal purposes, according to IRS Publication 554. A flat percentage cannot establish your after-tax income: your tax return and withholding depend on your circumstances. Retirees living in Texas can review our guide to Texas and federal taxes on military retirement pay.
Survivor coverage also needs a separate decision. The Survivor Benefit Plan provides eligible beneficiaries an annuity and has a cost. DFAS explains how SBP premiums are paid.
Do not use these tables as a net-deposit quote, particularly if disability benefits or other adjustments apply. Our guide to military retirement and VA disability explains the VA waiver, CRDP and CRSC interaction. Compare your official estimate and elections with your expected deductions before building a spending plan.
Does every person with 20 years get this pension?
Twenty years is not a universal formula for every type of military retirement. USAGov's retirement overview distinguishes regular active-duty retirement from non-regular Reserve retirement and disability retirement.
Reserve and National Guard retirement uses qualifying years and a points-based pay formula; payment generally begins at age 60, with exceptions that can permit an earlier start. Our Reserve and National Guard retirement guide explains qualifying years, how points affect pay and when payments can begin. Twenty qualifying Reserve years are not the same calculation as 20 creditable active-duty years in the examples above.
Eligibility also is not the same as an approved retirement. Confirm your retirement pathway, service credit and application requirements with your service before relying on a payment date.
Finally, VA Pension is a separate benefit with its own eligibility requirements. It is not another name for the military longevity pension calculated here.
What should you do with your estimate?
Start by comparing expected net pension income with a realistic household budget. Include housing, healthcare, debt and other recurring costs rather than comparing gross pension with your current gross salary.
For example, a hypothetical $2,500 gross pension against $3,500 monthly spending leaves at least a $1,000 gap before pension deductions. That subtraction is a budget illustration, not an estimate of your benefit or a recommended spending level.
Our guide to how much money you need to retire explains the broader spending-and-savings question. For the timing question, see when you can retire. These general guides do not replace an official military pension calculation.
If you later work in a Texas TRS-covered civilian position, Texas TRS military service credit concerns a separate civilian pension system. It does not calculate your military retired pay.
Before making a retirement decision:
- Confirm your retirement system and credited service with your service.
- Gather basic-pay history and compare your inputs with the official calculator.
- Review gross pay, deductions and survivor elections separately.
- Compare expected spendable income with your household budget.
- Ask your installation's finance office or a Military OneSource financial counselor about inputs you cannot verify.
Frequently asked questions
How much is military retirement pay after 20 years?
For standard active-duty High-36 retirement, it is 50% of your highest-36-month average basic pay; BRS uses 40%. A hypothetical $5,000 monthly average therefore produces $2,500 or $2,000 gross per month, respectively. Your actual pay base and credited service must be confirmed.
Does military retirement pay include BAH?
The formulas here use basic pay. Do not include housing allowance in that average or multiply your total compensation by the pension percentage.
Can I calculate an E-7 retirement pension from today's pay chart?
Today's chart alone does not give your actual highest-36-month average. You need the relevant pay history, creditable service and retirement system. A chart-based shortcut is not an official benefit quote.
Is BRS retirement 40% plus my TSP balance?
At exactly 20 years, the standard BRS pension multiplier is 40%. TSP savings remain a separate account; its balance is not automatically added to monthly pension pay.
Is military retirement pay tax-free?
Regular military retirement pay based on age or length of service is taxable for federal purposes. Different rules can apply to certain disability-related payments. Do not treat every military or veterans benefit as having the same tax treatment.
Is 20 years in the Reserve the same as 20 years of active duty?
No. Non-regular Reserve retirement has different service-credit and payment-start rules. Do not apply these active-duty tables to a Reserve points record.
Official sources
All financial rules in this guide are based on official government resources. Tables are author-calculated illustrations, not government-issued benefit quotes.
- Military retirement pay plans — militarypay.defense.gov
- Military retirement calculators — Military OneSource
- BRS Defined Benefit Fact Sheet — FINRED
- Military pay — Military OneSource
- Official retirement calculators — militarypay.defense.gov
- Military pay and pay-chart links — USAGov
- Blended Retirement System — Military OneSource
- Federal Thrift Savings Plan — Military OneSource
- Publication 554 — IRS
- Survivor Benefit Plan — Military OneSource
- SBP premium payments — DFAS
- Military and veteran retirement benefits — USAGov
- VA Pension eligibility — VA
Reviewed October 9, 2026. Educational information; your service's determination and applicable rules govern your benefits. See our methodology.
