Military High-3 Calculator

Begin by entering your current military compensation in the Base Pay Details section. Input your current monthly basic pay, found on your Leave and Earnings Statement (LES). Then, add your best estimate for the average annual pay raise you expect to receive until retirement. This should account for both congressionally approved raises and any promotions or time-in-service pay increases.

Next, provide your service details. Enter the number of years from now until you plan to retire from the military and the total number of creditable years you will have served at that time. The minimum for a full retirement is 20 years. Also, enter your current age, which helps project lifetime income.

For a more detailed projection, open the Advanced Settings. Here you can adjust the annual Cost-of-Living Adjustment (COLA) rate applied to your pension after you retire. You can also change your life expectancy, which affects the total lifetime income calculation. Once your inputs are set, click "Calculate" to see your full retired pay breakdown.

Current Monthly Base Pay

This is your current monthly basic pay before any allowances (like BAH or BAS) or special pays. Your High-3 pension is calculated using only your basic pay, so it's critical to use the correct starting number. You can find this amount on your latest LES.

Expected Annual Pay Raise

This is the average percentage your base pay will increase each year until you retire. This is a key factor in determining your future High-3 average. A good estimate might be between 3% and 4%, which reflects historical military pay raises. If you anticipate a promotion, you might use a slightly higher number for the years leading up to it.

Years Until Retirement

This is the number of years remaining in your military career. This input, combined with your annual pay raise, determines the trajectory of your base pay and what your salary will be during your final three years of service.

Years of Service at Retirement

Enter the total number of years you will have served when you retire. Under the High-3 system, your pension multiplier is calculated as 2.5% for each year of service. For example, 20 years of service equals a 50% multiplier (20 x 2.5%). This is capped at 30 years, for a maximum multiplier of 75%.

Current Age

Your current age is used with your years until retirement to determine your age at retirement. This, along with your life expectancy, helps the calculator estimate your total lifetime pension income.

COLA Rate

The Cost-of-Living Adjustment (COLA) is an annual increase to your retired pay to help it keep pace with inflation. High-3 retirees are eligible for the full COLA, which is tied to the Consumer Price Index (CPI). Using a long-term average, like 2.5%, provides a reasonable estimate. For more on this, see how Social Security COLA is explained.

Life Expectancy

This input defines the end point for the lifetime income projection. It is a planning assumption, not a prediction. Many financial planners recommend using an age like 90 or 95 to reduce the risk of outliving your financial plan.

This calculator simulates your military career's final years to estimate your High-3 pension. The methodology follows the official Department of Defense rules for the High-3 system.

First, the calculator projects your monthly base pay for each year from now until your planned retirement date. It starts with your current base pay and increases it annually by your expected pay raise percentage.

Next, it identifies your highest 36 months of basic pay. In a typical career with steady pay raises, these will be your final 36 months (3 years) of service. The calculator averages the monthly base pay from these 36 months to determine your "High-3 Average."

Then, it calculates your service multiplier by multiplying your total years of service at retirement by 2.5%. This percentage is capped at 75% (achieved at 30 years of service).

Finally, it calculates your gross monthly retired pay by multiplying your High-3 Average by your service multiplier percentage. The calculator also projects the total lifetime value of your pension by applying the COLA rate over the number of years between your retirement age and your life expectancy.

The calculations are performed in a sequence to arrive at your final retired pay estimate.

Future Base Pay Projection

The calculator projects your base pay for each year until retirement.

future monthly base pay (year Y) = current base pay * (1 + annual pay raise %)^Y

High-3 Average

The calculator averages your highest 36 months of basic pay. For this projection, it uses the average of your final three years of projected monthly pay.

year 1 pay = monthly pay in final year of service
year 2 pay = monthly pay in second-to-last year of service
year 3 pay = monthly pay in third-to-last year of service

high-3 average = (year 1 pay + year 2 pay + year 3 pay) / 3

Service Multiplier

Your years of service are converted into a percentage multiplier.

service multiplier % = min(75, years of service at retirement * 2.5)

Monthly Retired Pay

Your final monthly pension is calculated by applying the multiplier to your High-3 average.

monthly retired pay = high-3 average * (service multiplier % / 100)

Lifetime Pension Income

This formula estimates the total income from your pension over your lifetime, accounting for COLA.

retirement years = life expectancy - (current age + years until retirement)

lifetime income = sum of (annual retired pay * (1 + COLA %)^year) for each year in retirement

The High-3, or "High-36," retirement system is a defined-benefit pension plan for the U.S. military. It applies to service members who first entered a uniformed service after September 7, 1980, and before January 1, 2018.

The core of the system is the formula: Years of Service x 2.5% x High-3 Average Basic Pay.

To be eligible for an unreduced, immediate pension, a service member must complete at least 20 years of active service. The "High-3 Average" refers to the average of the highest 36 months of basic pay earned during a service member's career. For most members, this will be their last three years of service, when their pay is highest due to promotions and longevity raises.

This system provides a reliable, lifelong income stream that is adjusted annually for inflation (COLA). It differs from the newer Blended Retirement System (BRS), which has a smaller pension component (2.0% multiplier instead of 2.5%) but adds a government-matching contribution to the member's Thrift Savings Plan (TSP).

Understanding the difference between the High-3 system and the BRS is crucial for military financial planning.

The main trade-off is a smaller pension under BRS in exchange for a portable, government-matched defined-contribution plan (TSP). High-3 offers a larger pension for those who complete a full 20-year career but no benefit for those who separate earlier. If you are in the High-3 system, it's vital to contribute to your TSP independently, as you do not receive any government matching funds. Use a 401(k) calculator to see how your TSP can grow.

Monthly Retired Pay: This is your estimated gross monthly pension payment before taxes and other deductions (like SBP premiums). This is the core result of the calculator.

High-3 Average: This is the foundation of your pension calculation. It represents the monthly average of your 36 highest-paid months of basic pay. A higher average directly results in a larger pension.

Multiplier: This percentage reflects your years of service. At 20 years, it's 50%. At 30 years, it's capped at the maximum of 75%. The progress bar shows how close you are to this cap.

Lifetime Income: This is a projection of the total pension payments you could receive over your lifetime, adjusted for COLA. It highlights the immense value of a military pension as a long-term financial asset.

Base Pay Projection Chart: This visualizes how your monthly basic pay is expected to grow from now until retirement. The highlighted bars show the final three years, which are used to calculate your High-3 average.

Retirement Score: This is a summary metric that reflects the strength of your pension. It's based on your service multiplier and High-3 average, rewarding those who serve longer and achieve higher pay grades.

The two primary ways to increase your High-3 pension are to serve longer and to get promoted.

Serve Longer: Each additional year of service past 20 adds another 2.5% to your multiplier, up to the 75% cap at 30 years. The jump from a 50% multiplier at 20 years to a 62.5% multiplier at 25 years is a significant increase in lifetime income.

Get Promoted: Promotions and time-in-grade pay increases directly boost your basic pay. Since your pension is based on your highest 36 months, earning a promotion in your final years of service can have a substantial positive impact on your High-3 average.

Supplement with TSP: Your pension is just one part of your retirement. Actively contributing to your TSP, even without a match, is essential. Use the retirement savings calculator to see how your TSP balance can grow alongside your pension.

Plan for a Second Career: Many military retirees start a second career. The income from this new job, combined with your military pension, can create a very strong financial position and allow you to save aggressively for full retirement.

1. Including Allowances: A frequent error is to think that allowances like Basic Allowance for Housing (BAH) or Basic Allowance for Subsistence (BAS) are included in the High-3 calculation. They are not. The pension is based only on your basic pay.

2. Misunderstanding the Multiplier: Some believe the multiplier continues to grow past 30 years of service. It is hard-capped at 75%. While your High-3 average can still increase with pay raises after 30 years, the 75% multiplier will not change.

3. Forgetting About Taxes: Military retired pay is considered taxable income at the federal level. State tax rules vary; some states do not tax military retirement pay at all. Check the rules for the best states to retire for taxes.

4. Neglecting the Survivor Benefit Plan (SBP): Your pension ends when you die. The SBP is an insurance program that allows you to provide a portion of your retired pay as a lifetime annuity to a surviving spouse or eligible children, at the cost of a monthly premium. This is a critical decision to make at retirement.