Military Retirement & TSP Guide 2026

Military Retirement Systems Overview

The military retirement system has changed significantly over the last decade, and which system you're in determines your entire retirement planning framework.

High-3 (Legacy System): Applies to service members who entered before January 1, 2018 and had 12 or more years of service as of December 31, 2017. Those who opted out of BRS during the 2018 opt-in window also remain on High-3. The pension is defined benefit only — no TSP matching.

Blended Retirement System (BRS): Applies to everyone who entered service on or after January 1, 2018, plus legacy members who opted in during the 2018 window. BRS combines a slightly smaller pension with mandatory government TSP contributions.

REDUX (rare): A third option that some legacy-era service members accepted, trading a higher career retirement COLA adjustment for a $30,000 Career Status Bonus at the 15-year mark. REDUX significantly reduces the real value of the pension over time and is rarely the right choice in hindsight.

If you're unsure which system you're on, your LES will show TSP matching contributions if you're on BRS. You can also verify through your MyPay account.

How Your Pension Is Calculated

High-3

The High-3 pension formula is straightforward:

Monthly pension = Multiplier × Average highest 36 months of base pay

• At exactly 20 years: 50% (2.5% × 20 years)
• At 22 years: 55%
• At 30 years: 75% (maximum — additional years don't increase the pension)

The "highest 36 months" means the three consecutive years of highest base pay — almost always your final 36 months, since pay generally increases with time. At retirement, you lock in that average and receive it for life.

Annual COLA adjustments: High-3 retirees receive annual cost-of-living adjustments equal to the full CPI-W inflation rate. This is critical for long-term retirement planning — a $3,000/month pension in 2026 maintains its real purchasing power indefinitely.

Example: O-5 retiring with exactly 20 years of service

• Final base pay: approximately $9,660/month (2026 O-5 at 20 years)
• Highest 36 months average: approximately $9,200/month
• Pension: 50% × $9,200 = $4,600/month ($55,200/year)
• This continues for life, with annual COLA adjustments

BRS

BRS uses the same 2.5% per year formula, but starts at 40% (not 50%) at 20 years. The pension reduction is partially offset by TSP matching.

Monthly pension = Multiplier × Average highest 36 months of base pay

• At 20 years: 40%
• At 22 years: 45%
• At 30 years: 70%

BRS also includes Continuation Pay — a one-time lump-sum bonus paid between 8 and 12 years of service (the exact timing varies by branch and career field), in exchange for a commitment to serve an additional 3–4 years of active duty. The multiplier ranges from 2.5× to 13× monthly base pay depending on branch and specialties, giving a wide range of actual dollar amounts. Continuation Pay is taxable income in the year received.

For a detailed comparison of the two systems' long-term value, see BRS vs. High-3: Which Military Retirement System Wins?

The Thrift Savings Plan (TSP)

The TSP is the federal government's equivalent of a 401(k). It is available to all service members — both active duty and Guard/Reserve — and offers the same investment options and contribution limits. The key difference from most civilian 401(k) plans: the expense ratio.

TSP expense ratio: 0.055% — meaning you pay $0.55 per year for every $1,000 invested. The average actively managed mutual fund charges 10–20× more. This seemingly small difference compounds dramatically over a 20-30 year career.

2026 contribution limits:

• Annual elective deferral limit: $24,500
• Catch-up contributions (age 50–59 and 64+): additional $8,000 (total $32,500)
• Enhanced catch-up (ages 60–63, SECURE 2.0): additional $11,250 (total $35,750)
• Combat zone contributions: no annual limit on combat zone special pay contributions

TSP fund options:

• G Fund: Government securities, essentially a zero-volatility savings account that currently yields around 4-5% annually
• F Fund: Fixed income (bond) index fund
• C Fund: S&P 500 index fund (large-cap U.S. equities)
• S Fund: Small/mid-cap U.S. equity index
• I Fund: International equities index
• L Funds: Lifecycle funds that automatically adjust allocation by target retirement date (L 2030, L 2040, L 2050, etc.)

Default fund: New TSP participants are automatically enrolled in the age-appropriate Lifecycle (L) fund based on their expected retirement date — not the G Fund (the old G Fund default was changed in 2015). If you haven't made an active fund election, check your current allocation. The L funds automatically adjust to a more conservative mix as you approach retirement, which is appropriate for most members who prefer a hands-off approach.

For most service members in their 20s and early 30s, an aggressive growth allocation (heavy C and S fund weighting) is appropriate given the long time horizon. The L funds provide a simple "set it and forget it" approach.

Roth vs. Traditional TSP

This is one of the most common questions in military personal finance — and the answer depends on your tax bracket, expected future income, and assignment location.

Traditional TSP: Contributions are pre-tax (lower taxable income now), but withdrawals in retirement are fully taxable.

Roth TSP: Contributions are after-tax (no tax break now), but qualified withdrawals in retirement are completely tax-free, including all growth.

Factors that often favor Roth for junior and mid-grade service members:

1. Lower current tax brackets: An E-5 or O-2 is likely in the 12–22% federal bracket. Roth contributions are taxed at those low rates now, and all future growth is tax-free. If retirement income (pension + Social Security + TSP withdrawals) pushes you into the 22–24% bracket, you've locked in the low rate.

2. Combat zone Roth opportunity: Contributions made from combat zone tax-excluded pay can go into Roth TSP completely tax-free — you're contributing untaxed money that will never be taxed again on withdrawal. This is one of the most favorable tax plays available to service members.

3. Pension backstop: Military retirees already have a guaranteed taxable income stream (the pension) in retirement. That pension reduces the need for additional taxable income from a traditional TSP — making tax-free Roth withdrawals more valuable.

For detailed analysis, see The Roth TSP Advantage for Junior Enlisted.

BRS Matching — Free Money You Might Be Leaving Behind

If you're on BRS, the government matching structure is:

• 1% automatic contribution: The government deposits 1% of your base pay into your TSP regardless of whether you contribute anything. This begins after 60 days of service and vests at 2 years — if you separate before 2 years, you forfeit the 1% auto contributions.
• Dollar-for-dollar match on first 3%: Contribute 3% of base pay → government adds another 3%. This matching vests immediately.
• 50 cents on the dollar for next 2%: Contribute 4% → government adds 0.5%; contribute 5% → government adds another 0.5%.
• Total maximum government contribution: 5% of base pay (1% auto + up to 4% match), reached when you contribute at least 5%.

The total structure at maximum: you contribute 5%, the government contributes 5%, for a total of 10% of your base pay going into TSP every pay period. This is the minimum contribution to capture full matching.

The cost of under-contributing: If you contribute 3% of base pay instead of 5%, you're forfeiting 1% of base pay — approximately $37–$97/month depending on grade — in matching contributions. On a $3,717/month E-5 salary, leaving the final 2% unmatched costs roughly $74/month or $888/year. Over a 20-year career with compounding, that difference is substantial.

The pension reduction under BRS (40% vs. 50% at 20 years) is approximately 10% of your highest 36-month average pay — for the O-5 example above, that's roughly $920/month in pension. The TSP matching partially offsets this, but the offset depends entirely on how much you contribute and how your investments grow. Running the numbers for your specific situation is exactly what the Retirement Calculator is designed for.

Should You Stay to 20?

The 20-year mark is the financial cliff in military retirement — retire at 19 years and 11 months and you receive exactly $0 in pension. Retire at 20 years and you receive a defined benefit for life.

This creates a powerful incentive to stay — but it also means the military has some degree of leverage over service members approaching the 20-year mark. Understanding the real financial framework helps you make the decision on your terms.

What the pension is actually worth:

The lifetime value of a military pension depends on your age at retirement (which determines how many years you'll collect), the monthly amount, and COLA adjustments. An E-7 retiring at age 38 with a $2,500/month pension who lives to 82 will collect that pension for 44 years — with COLA adjustments, the lifetime nominal value can easily exceed $2 million.

Healthcare: Military retirees and their families qualify for TRICARE coverage — one of the most comprehensive and affordable health insurance options available anywhere. For a family, the difference between TRICARE and civilian employer coverage can exceed $10,000-$15,000/year. This benefit is often underweighted in retirement calculations.

The civilian salary you'd need: To match the financial value of military retirement (pension + healthcare + commissary/exchange access), a civilian job would need to offer significantly higher compensation than your final military base pay. See What Civilian Salary Do You Need to Match Military Pay?

For the full framework on the stay-to-20 decision, see Should I Stay to 20 Years?

VA Disability and Retirement Pay

Veterans who retire from military service with at least 20 years and have a VA disability rating face a potentially complex interaction between the two income streams.

The old rule (pre-2004): Retirement pay was reduced dollar-for-dollar by VA compensation. You couldn't receive both in full.

Concurrent Retirement and Disability Pay (CRDP): Since 2004, retirees with a VA disability rating of 50% or higher receive full retirement pay plus full VA compensation — no offset. CRDP phases in for ratings below 50% (10% reductions for each tier below 50%).

Combat-Related Special Compensation (CRSC): An alternative to CRDP available to retirees whose disability is specifically combat-related. CRSC has the advantage of being non-taxable, unlike retirement pay. For retirees with combat-related disabilities below 50%, CRSC may produce higher after-tax income than CRDP.

You can only receive CRDP or CRSC — not both — and you must apply for CRSC through your branch's finance center.

Related Guides

• Military Pay & Compensation Guide — How base pay feeds into your pension calculation and what your total compensation looks like today
• VA Disability Benefits Guide — Detailed guide to VA disability ratings, including CRDP and CRSC