Blended Retirement System Calculator

Estimate your total military retirement benefits under the Blended Retirement System (BRS). This calculator projects your monthly pension using the 2.0% multiplier, your Thrift Savings Plan (TSP) growth with government matching, and your one-time continuation pay bonus. See your total projected retirement income, year by year.

This tool is for active-duty service members covered by the BRS who want to understand their complete retirement package. If you are under the legacy High-3 system, use the military retirement pay calculator for a more accurate estimate. For a detailed look at government contributions, see the TSP match calculator.

The calculator provides a BRS Retirement Score, a breakdown of your monthly income from both the pension and TSP, and a projection of your TSP balance at retirement. You will see charts illustrating how your retirement income grows over time with cost-of-living adjustments (COLA) and how your total lifetime benefits accumulate.

Begin with your Military Service Details. Enter your current monthly base pay, the total years of service you plan to complete before retiring, your current age, and your planned retirement age. These inputs establish the foundation for your pension calculation and TSP growth timeline.

Next, fill in the Thrift Savings Plan (TSP) section. Provide your current TSP contribution as a percentage of your base pay, your current total TSP balance, and the expected annual return on your TSP investments. To receive the full government match, you must contribute at least 5% of your base pay. This is a critical input for maximizing your BRS benefits.

Then, move to the Continuation Pay and Life Expectancy fields. The continuation pay multiplier determines the size of a one-time bonus you are eligible for at 12 years of service. Life expectancy helps project the total lifetime value of your pension and TSP income streams.

For a more detailed projection, open the Advanced Settings. Here you can adjust assumptions for the annual pension COLA rate, general inflation, your TSP withdrawal rate in retirement (the 4% rule is a common starting point), and your expected annual pay growth from promotions and longevity.

Monthly Base Pay

This is your current monthly base pay before taxes or any special pays and allowances. This figure is the starting point for calculating your future pension, TSP contributions, and government matching. You can find your exact base pay on the official military pay charts for your rank and time in service.

Years of Service at Retirement

Enter the total number of active duty years you expect to have completed when you retire. To be eligible for the BRS pension, you must serve at least 20 years. A longer service history directly increases your pension multiplier and, therefore, your monthly pension amount.

Current Age & Retirement Age

Your current age and planned retirement age determine the number of years you have left to contribute to your TSP. A longer time horizon allows your contributions, government match, and investment returns more time to compound, leading to a significantly larger TSP balance.

TSP Contribution

This is the percentage of your base pay you contribute to your Thrift Savings Plan each month. This is one of the most important inputs you control. Contributing at least 5% is essential to capture the full 5% government contribution (1% automatic + 4% match). For context on saving, see our general retirement savings calculator.

Current TSP Balance

Enter the total amount of money you currently have in your TSP account. This is the starting principal that will grow with future contributions and investment returns. A higher starting balance can dramatically accelerate your wealth accumulation.

Expected TSP Return

This is the average annual rate of return you expect your TSP investments to generate. Your return will depend on your allocation across the G, F, C, S, I, and L funds. Historically, diversified, long-term stock-heavy portfolios have returned more than conservative ones, though with higher risk.

Continuation Pay Multiplier

At 12 years of service, BRS offers a one-time, mid-career cash bonus called Continuation Pay in exchange for an additional service commitment. The multiplier ranges from 2.5x to 13x your monthly base pay, depending on your service branch and specialty. The active duty minimum is 2.5x.

Life Expectancy

This is a planning assumption for how long you expect your retirement to last. A longer life expectancy increases the total lifetime value of your pension, as it will be paid out for more years with COLA adjustments.

Advanced: COLA, Inflation, Withdrawal & Pay Growth Rates

These advanced inputs fine-tune the projection.

• COLA Rate: The Cost-of-Living Adjustment applied to your pension payments annually to help them keep pace with inflation.
• Inflation Rate: The general rate of inflation, which can be used to understand the future purchasing power of your retirement income. Learn how inflation affects retirement savings.
• TSP Withdrawal Rate: The percentage of your TSP you plan to withdraw each year in retirement. This determines your monthly TSP income.
• Pay Growth Rate: The average annual increase you expect in your base pay due to promotions and longevity raises.

This calculator models the three core components of the Blended Retirement System to project your total retirement picture.

First, it calculates your defined benefit pension. It projects your base pay forward to your retirement date using the pay growth rate. It then applies the BRS formula: 2.0% multiplied by your years of service, applied to your high-3 average basic pay. This determines your initial annual pension.

Second, it projects your defined contribution savings in the Thrift Savings Plan. Starting with your current balance, it simulates year-by-year growth until retirement. Each year, it adds your personal contributions and the calculated government matching contributions (1% automatic plus up to a 4% match). This total amount then grows based on your expected TSP return.

Third, after you retire, the calculator combines these two income streams. It takes the annual pension and applies the COLA rate for each year of retirement. It calculates your annual TSP income by applying your chosen withdrawal rate to your projected TSP balance at retirement. The sum of these two provides your total annual retirement income, which is then broken down into a monthly figure. The projection continues until your specified life expectancy.

The calculator uses a year-by-year projection based on the following core formulas.

BRS Pension Formula

The pension is based on your projected final pay at retirement.

projected_annual_base_pay = (monthly_base_pay * 12) * (1 + pay_growth_rate) ^ years_to_retirement

pension_multiplier = 2.0% * years_of_service

annual_pension_at_retirement = projected_annual_base_pay * pension_multiplier

TSP Matching Formula

The government match is calculated based on your contribution rate.

automatic_contribution = 1.0%

matching_contribution = MIN(4.0%, your_contribution_rate_up_to_3% * 1.0 + your_contribution_rate_from_3_to_5% * 0.5)

total_government_contribution_pct = automatic_contribution + matching_contribution

TSP Projection Formula

The TSP balance is projected year-by-year until retirement.

annual_contribution = pay_this_year * (your_contribution_pct + total_government_contribution_pct)

ending_tsp_balance = (starting_tsp_balance + annual_contribution) * (1 + tsp_return_rate)

Retirement Income Formulas

In retirement, income comes from the pension and TSP withdrawals.

annual_pension_income = annual_pension_at_retirement * (1 + cola_rate) ^ years_since_retirement

annual_tsp_income = tsp_balance_at_retirement * tsp_withdrawal_rate

total_annual_retirement_income = annual_pension_income + annual_tsp_income

The Blended Retirement System is a major shift from the traditional "High-3" (also called High-36) legacy system. Understanding the differences is key to planning your financial future.

Pension Multiplier:

• High-3: 2.5% per year of service. A 20-year career yields a pension of 50% (2.5% x 20) of the average of your highest 36 months of base pay.
• BRS: 2.0% per year of service. A 20-year career yields a pension of 40% (2.0% x 20) of your high-3 average basic pay. This 20% reduction in the pension is the primary trade-off of the BRS.

Thrift Savings Plan (TSP):

• High-3: Service members could contribute to the TSP, but there was no government matching contribution. All growth was self-funded.
• BRS: The government provides an automatic 1% contribution to your TSP after 60 days of service and will match your contributions up to an additional 4%. This means the government can contribute up to 5% of your base pay to your TSP, which is the key benefit of BRS.

Portability:

• High-3: You receive no pension benefits if you leave before 20 years of service. It's an all-or-nothing system.
• BRS: The government's automatic 1% contribution and any associated earnings are yours after 2 years of service. You keep your own contributions and the government match immediately. This means even members who separate before 20 years leave with a retirement asset.

Continuation Pay:

• High-3: No such bonus exists.
• BRS: Offers a mid-career cash bonus at 12 years of service in exchange for an additional service commitment. This provides a retention incentive and an opportunity for a lump-sum investment.

The BRS system was designed to provide retirement benefits to a larger portion of the force (about 85%) compared to the High-3 system, which only benefited the roughly 19% who served 20 years or more. Use the military high-3 calculator to run a direct comparison.

Your Thrift Savings Plan is the most flexible and powerful component of your BRS package. Maximizing it is crucial for a secure retirement.

1. Contribute at Least 5%: This is the golden rule of BRS. By contributing 5% of your base pay, you capture the full 5% government contribution (1% automatic + 4% match). Anything less is leaving free money on the table. This is effectively an immediate 100% return on your investment.

2. Increase Contributions Over Time: While 5% is the minimum to get the full match, your goal should be to save 15% or more of your income for retirement. The 2026 TSP contribution limit is $23,500. As you get pay raises and promotions, increase your contribution percentage. Even a 1% increase each year can make a huge difference over a 20+ year career.

3. Choose an Appropriate Fund Allocation: The default TSP fund is an age-appropriate L Fund (Lifecycle Fund). These funds automatically become more conservative as you approach your target retirement date, which is a great option for many. However, you can also build your own portfolio using the individual G, F, C, S, and I funds to match your personal risk tolerance.

4. Consider Roth TSP: The TSP offers both Traditional (pre-tax) and Roth (after-tax) contribution options. Traditional contributions lower your taxable income today, but withdrawals are taxed in retirement. Roth contributions are made with after-tax dollars, but qualified withdrawals in retirement are tax-free. Many younger service members in lower tax brackets benefit from the Roth option. Compare the two with our Roth vs Traditional IRA guide, as the principles are similar.

BRS Retirement Score: This score gives you a quick snapshot of your plan's health. A high score suggests you are on a strong path by maximizing the TSP match and projecting a solid income stream. A lower score indicates areas for improvement, most often by increasing your TSP contribution rate.

Monthly Pension & TSP Income: This section breaks down your total retirement income into its two main sources. The pension is a guaranteed, inflation-adjusted annuity for life. The TSP income depends on your projected balance and withdrawal rate, offering more flexibility but also market risk.

Total Monthly Income: This is your projected "retirement paycheck," the sum of your pension and TSP income. This is the number you can use to build a retirement budget.

Continuation Pay: This shows the value of your one-time bonus at 12 years of service. Consider this a lump-sum that can be invested, used to pay down debt, or saved for another goal.

Government TSP Match: This highlights the "free money" you receive from the government. It's a clear indicator of whether you are taking full advantage of the BRS benefits.

BRS Retirement Income Over Time Chart: This visualizes how your income streams evolve. You'll see the BRS Pension line steadily increase due to COLA, while the TSP Withdrawals line provides a stable base of income.

If your projected retirement income is lower than you'd like, you have several levers to pull:

1. Increase Your TSP Contribution: This is the most effective way to boost your results. If you're not contributing at least 5%, start there immediately. If you are, try increasing your contribution by 1% each year.
2. Serve Longer: Each additional year of service increases your pension multiplier by 2.0%. Extending a career from 20 to 24 years increases the pension from 40% to 48% of your base pay—a 20% raise in your pension for life.
3. Review Your TSP Investments: A more aggressive allocation (more C, S, and I funds) early in your career can lead to higher long-term returns and a larger TSP balance, though it comes with more risk.
4. Invest Your Continuation Pay: Instead of spending the bonus, consider contributing it to a Roth IRA or a taxable brokerage account to further boost your retirement savings.
5. Plan Your Withdrawals: A more conservative withdrawal rate in retirement can make your TSP last longer. Test different scenarios with the nest egg withdrawal calculator.

1. Not Contributing 5% to TSP: This is the single biggest and most common mistake. Failing to contribute 5% means you are forfeiting part of the government match.
2. Forgetting to Increase Contributions: Many service members "set it and forget it" at 5%. As your pay increases, your contribution percentage should, too.
3. Being Too Conservative with TSP: Young service members with decades until retirement can often afford to take on more investment risk for the potential of higher returns. Sticking to the G Fund for 30 years can severely limit your growth potential.
4. Cashing Out the TSP When Separating: If you leave the military before 20 years, it's tempting to cash out your TSP. This is often a poor choice due to taxes and penalties, and it sacrifices decades of future tax-advantaged growth.
5. Ignoring the System Entirely: The BRS requires active participation to maximize its value. Unlike the old system where the pension was automatic, you must actively contribute to the TSP to get the full benefit.