TSP Calculator

Important Data Sources

Estimate How Your TSP Could Grow Over Time

The TSP Calculator from Federal Employee Advisor Network helps federal employees estimate how their Thrift Savings Plan balance may change over time based on the information and assumptions they enter.

Use the calculator to model different contribution amounts, time horizons, and assumed rates of return. Results are estimates and are intended for educational and planning purposes only.

Who Is This TSP Calculator For?

This calculator may be useful for federal employees who want to:

• Estimate a potential future TSP balance
• See how contribution changes may affect long-term savings
• Compare different retirement timelines
• Understand the potential effect of investment-growth assumptions
• Review how applicable agency contributions may affect projections

Whether you are early in your federal career or approaching retirement, the calculator can help illustrate how different assumptions may change your projected TSP balance.

Why Use a TSP Growth Calculator?

A TSP growth calculator can help turn your current account information and savings assumptions into a long-term projection.

By entering details such as your current balance, expected contributions, years until retirement, and assumed annual return, you can model questions such as:

• How much could my TSP balance be by retirement?
• What happens if I increase or decrease my contributions?
• How does a longer or shorter investment period affect the projection?
• How might applicable agency contributions affect future savings?
• How sensitive is the estimate to different rates of return?

These projections can be useful for comparing scenarios, but they do not predict future investment performance.

How to Use the TSP Calculator

• Enter Your Current TSP Balance: Enter your current account balance as the starting point for the calculation.
  
  If you are just beginning to contribute, you may enter $0.
• Enter an Assumed  Rate of Return: Enter an annual rate of return to use for the projection.
  
  The rate you choose is an assumption only. Actual TSP investment returns vary depending on fund performance, market conditions, your investment allocation, and other factors.
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  Past performance does not guarantee future results.
  
• Enter the Number of Years Until Retirement: Enter the number of years you expect to continue saving before your planned retirement date.
  
  A longer investment period generally gives contributions more time to compound, but actual results will depend on contributions and investment performance.
  
• Enter Your Expected Contributions: Enter the amount you expect to contribute to your TSP.
  
  Where applicable, you may also account for agency automatic and matching contributions when estimating total annual additions.
  
  Agency contributions depend on your retirement system, employment status, contribution level, and TSP eligibility.

Example TSP Growth Calculation

Assume the following hypothetical values:

• Current TSP balance: $50,000
• Assumed annual return: 5%
• Years until retirement: 20
• Annual contributions and applicable agency contributions: $10,000

Plugging these values into the formula

Using these assumptions, the calculator can estimate the potential future value of the account.

This example is for illustration only. Actual TSP results may be higher or lower because investment returns, contributions, employment circumstances, and other factors can change over time.

Plugging these values into the formula

Benefits of Using a TSP Calculator

• Compare Contribution Scenarios: See how different contribution amounts could change your projected account balance.
• Understand the Effect of Time: Model how the number of years remaining until retirement may affect long-term TSP growth.
• Test Different Return Assumptions: Compare projections using different hypothetical rates of return rather than relying on a single forecast.
• Review Potential Retirement Savings: Use the projection as one piece of a broader retirement-planning review that may also include FERS or CSRS benefits, Social Security, other savings, expenses, and income needs.

TSP Contribution Limits for 2026

For 2026, the general employee elective deferral limit applicable to the Thrift Savings Plan is:

• Standard elective deferral limit: $24,500
• General catch-up limit for eligible participants age 50 or older: $8,000
• Higher catch-up limit for eligible participants ages 60–63: $11,250

That means an eligible participant using the general age-50 catch-up may be able to contribute up to $32,500, while an eligible participant qualifying for the higher age-60-to-63 catch-up may be able to contribute up to $35,750, subject to applicable rules.

Traditional and Roth employee contributions generally share the same overall elective deferral limit.

Contribution rules can vary based on age, compensation, payroll circumstances, and applicable tax rules. Review current IRS and TSP guidance before making contribution decisions.

Planning Your TSP Contributions

When reviewing your contribution strategy, consider factors such as:

• Your current contribution percentage
• Applicable agency automatic and matching contributions
• Annual IRS contribution limits
• The number of pay periods remaining in the year
• Your current cash-flow needs
• Your expected retirement date
  Your overall retirement income strategy

For employees eligible for agency matching contributions, spreading contributions appropriately across the year may help avoid situations where reaching the annual employee contribution limit too early affects the opportunity to receive matching contributions in later pay periods.

Your individual circumstances may differ, so review your payroll and TSP information before making changes.

TSP Investment Considerations

The TSP offers several investment options with different objectives and levels of risk.

A calculator cannot determine which TSP fund or allocation is appropriate for you. It can only estimate potential outcomes based on the return assumptions you enter.

When evaluating an investment allocation, consider factors such as:

• Time until retirement
• Risk tolerance
• Other retirement assets
• Income needs
• Diversification
• Your overall financial circumstances

Understanding TSP Lifecycle Funds

TSP Lifecycle, or L Funds, are diversified portfolios that automatically adjust their investment mix over time based on a target date.

As the target date approaches, the allocation generally becomes more conservative.

Whether an L Fund or another TSP allocation is appropriate depends on your individual circumstances, retirement timeline, risk tolerance, and broader financial plan.

A TSP Calculator should not be used to determine which fund is “best” or to predict future fund performance.

Use Your TSP Estimate as Part of a Broader Retirement Review

Your TSP is only one part of federal retirement planning.

Depending on your situation, your retirement income may also involve:

• FERS or CSRS retirement benefits
• Social Security
• Other retirement accounts
• Insurance and healthcare considerations
• Taxes
• Retirement expenses
• Other savings and investments

Reviewing these components together can provide a more complete picture than relying on a TSP projection alone.

Why Choose Federal Employee Advisor Network

Federal Employee Advisor Network provides educational resources and retirement-planning support for federal employees navigating TSP, FERS, CSRS, Social Security, and other retirement considerations.

If you would like to discuss how your TSP fits into your broader retirement picture, you can schedule a consultation with an advisor.

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