Understanding o5 retirement pay starts with one surprising fact: a Lieutenant Colonel or Commander who serves 20 years can walk away with a lifetime pension worth well over a million dollars in cumulative payments — before counting healthcare, VA benefits, or Thrift Savings Plan balances.
Yet many service members at the O-5 grade misunderstand how their pension is actually calculated, which leads to costly decisions around retirement dates, survivor benefits, and the Blended Retirement System.
This guide breaks down the five facts that matter most: how the pension formula works, how High-3 and BRS differ, what factors push your payout up or down, how survivor benefits protect your family, and which tools help you run the numbers yourself.
How O-5 Retirement Pay Is Calculated
The core formula is straightforward: your pension equals your Years of Service multiplied by 2.5%, applied to your High-36 average. Your High-36 (also called High-3) is the average of your highest 36 months of base pay, which for most O-5s is the final three years before retirement. Getting o5 retirement pay right means understanding exactly how this average is computed.
Under the legacy High-3 system, an O-5 retiring at 20 years receives 50% of that average (20 × 2.5%). Serve 24 years and the multiplier climbs to 60%. There is no cap on years of service — the multiplier keeps growing.
Two things move this number significantly:
- Paygrade at retirement. Retiring as an O-5 versus an O-4 typically raises your High-36 average by a meaningful margin, because base pay for O-5 exceeds O-4 at every longevity step.
- Time in service (TIS). Base pay increases at each longevity step (over 12, over 14, over 16 years), so timing your final 36 months matters.
How to apply this: pull your projected final three years of base pay from the official Defense Finance and Accounting Service (DFAS) pay tables and average them — that gives you the High-36 figure every other calculation depends on.
High-3 vs. BRS: Which System Applies to You
Your o5 retirement pay depends heavily on which retirement system you fall under. Since January 1, 2018, new service members are automatically enrolled in the Blended Retirement System (BRS), while most who joined before 2018 stayed under High-3 unless they opted in during the 2018 window.
Under BRS, the pension multiplier drops from 2.5% to 2.0% per year of service. That means a 20-year O-5 receives 40% of High-36 instead of 50% — but the government contributes up to 5% matching into your Thrift Savings Plan account, which can offset much of the difference if you invest consistently.
Understanding which system governs your o5 retirement pay is essential before making any career decisions.
| Factor | High-3 (Legacy) | BRS |
|---|---|---|
| Pension multiplier | 2.5% per year | 2.0% per year |
| 20-year pension | 50% of High-36 | 40% of High-36 |
| Government TSP match | None | Up to 5% of basic pay |
| Lump-sum Continuation Pay | No | Yes (2.5x–4x monthly pay) |
| Portable at under 20 years? | No | Yes (vested TSP funds) |
| Best action | Check SBP math carefully | Max your TSP match yearly |
The DoD's official BRS comparison calculator lets you model both outcomes with your own numbers.
How to apply this: confirm which system you're in through your milConnect record before making any retirement-timing decision.
What Factors Raise or Lower Your Monthly Check
Three levers determine the actual dollars deposited each month, and all three are within your awareness (if not full control). Each lever directly affects the o5 retirement pay you'll receive for the rest of your life.
Longevity and rank timing. Base pay for an O-5 rises at each TIS step, so retiring just after a step increase raises your High-36. If you're months from a higher longevity band, it can be worth checking the dates.
Cost-of-living adjustments (COLA). Military retired pay receives annual COLAs tied to the Consumer Price Index. According to DFAS, retired pay COLAs are applied each year to preserve purchasing power — over a 30-year retirement, these adjustments compound dramatically.
Concurrent receipt rules. If you receive VA disability compensation, the rules on how it interacts with your retired pay matter. The VA explains that retirees rated 50% or higher disabled by the VA may receive both full VA compensation and full retired pay under Concurrent Retirement and Disability Pay (CRDP).
How to apply this: request your projected retired pay statement from DFAS and compare it against a self-calculated High-36 estimate — discrepancies are worth resolving before your retirement date, not after.
Survivor Benefit Plan: Protecting Your Family's Income
The Survivor Benefit Plan (SBP) is the most misunderstood decision on an O-5's retirement paperwork. If you die before your spouse, SBP continues 55% of your retired pay to your surviving spouse for life — and O-5 retirees carry large pensions, which makes the stakes higher.
Choosing SBP coverage directly shapes how much of your o5 retirement pay your family can retain after you're gone.
The premium is typically 6.5% of the covered base amount for spouse coverage, deducted from your retired pay each month. Declining SBP requires a written election, often with spousal notarization, precisely because the choice is so consequential.
Consider a common scenario: an O-5 retiring at 20 years with a substantial pension faces premiums near $600 per month but guarantees a lifelong survivor annuity with COLA protection. Commercial life insurance can cost less in premiums, but it runs out when the money is spent — SBP never does.
Alternatives worth reviewing before you sign:
- SBP at reduced coverage levels to lower premiums
- Term life insurance layered during high-expense years
- Paid-up coverage after 360 monthly payments and age 70
How to apply this: model SBP premiums against an equivalent life-insurance premium using DFAS's SBP calculator before your retirement briefing.
Taxes, VA Benefits, and State Residency Choices
Retired military pay is federal taxable income, but your effective tax bill varies enormously by state. Many states fully exempt military retired pay, others offer partial exemptions, and some tax it as ordinary income — which is why your state of residence at retirement is a real financial decision.
Your o5 retirement pay can stretch significantly further in a state that doesn't tax military pensions.
Two benefit interactions every retiring O-5 should understand:
- VA disability compensation is tax-free. Under CRDP (for 20+ year retirees rated 50%+), you can receive both, which effectively converts taxable retired pay into tax-free VA income dollar-for-dollar.
- Combat-Related Special Compensation (CRSC) restores retired pay offset for combat-related conditions, tax-free, regardless of disability rating percentage.
The DFAS retired pay account portal and your MyPay statement show exactly how these offsets appear on your monthly deposit. Checking the IRS guidance on military retirement income clarifies what is and isn't taxable at the federal level.
How to apply this: compare state tax treatment for military retired pay across the states you're considering, and file a VA claim early enough that your disability rating is settled near your retirement date.
Tools That Make the Math Easier
You don't need a financial advisor to model o5 retirement pay accurately — free official tools handle it. These resources let you project your o5 retirement pay under multiple scenarios without paying for professional advice.
- DFAS retirement calculators — project High-3, BRS, and SBP outcomes with your own pay history.
- Thrift Savings Plan (TSP) — check your account balance, contribution matching, and withdrawal options that supplement your pension.
- milConnect — verify which retirement system you're under and review your service history for the official record.
Run each tool with conservative assumptions, then compare against DFAS's official projections once you're within a year of retirement.
Frequently Asked Questions About o5 retirement pay
How does o5 retirement pay change if I retire with 24 years instead of 20?
Each additional year adds 2.5% (High-3) or 2.0% (BRS) to your multiplier, so the difference between 20 and 24 years is substantial. A 24-year High-3 retiree earns 60% of High-36 versus 50%. Add a higher longevity pay step, and o5 retirement pay can jump noticeably with just a few extra years.
Can I receive o5 retirement pay and VA disability at the same time?
Yes, under CRDP if you're a 20-year retiree rated 50% or higher by the VA. Below 50%, retired pay is normally offset dollar-for-dollar by tax-free VA compensation unless CRSC applies. File your VA claim during the Benefits Delivery at Discharge window to avoid gaps in income.
Yes, you can receive o5 retirement pay and VA disability together if CRDP or CRSC applies to your situation.
Is o5 retirement pay taxable in every state?
No — a large number of states fully exempt military retired pay, while others offer partial exemptions or tax it normally. Because state law changes regularly, verify current rules with the state revenue department before establishing residency for your o5 retirement pay deposit.
What happens to my o5 retirement pay if I'm promoted to O-6 before retiring?
Your High-36 average includes the higher O-6 base pay, which raises your pension for life. Some officers retire shortly after promotion to capture roughly one year of O-6 pay in the High-36 window. Review the pay tables to see whether the timing works in your case.
Your o5 retirement pay can actually increase if an O-6 promotion boosts your High-36 average before retirement.
Does o5 retirement pay continue for life, and does it ever stop?
Retired pay continues for your lifetime with annual COLAs. It stops only at death unless SBP coverage transfers a portion to your spouse. Dual-military couples and divorces involving a court-ordered division can split the payment, so update your DFAS pay account after any major life event.
Conclusion
Your pension is one of the most valuable financial assets you'll ever own — treat the decisions around it with the same care as a home purchase.
- Know your system. High-3 (2.5%/year) versus BRS (2.0%/year plus TSP match) changes everything downstream.
- Maximize High-36. Rank, longevity steps, and final-year timing all raise your baseline.
- Decide SBP deliberately. Model the 6.5% premium against real alternatives before you sign.
- Layer tax-free benefits. VA disability via CRDP can significantly shelter your o5 retirement pay from taxation.
Start today by logging into DFAS and running your official retirement projection — then use that number to make every remaining decision with confidence.
