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Your Federal Pension May Replace Less Income Than You Think

FFEBA Contributor

June 22, 2026

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Many federal employees spend their careers assuming that their federal pension, Social Security, and Thrift Savings Plan will combine to provide a comfortable retirement. In reality, the way those three pieces work together often looks different from what employees expect.

The first surprise is often the pension itself.

Under FERS, your annuity is generally calculated using a simple formula: your High-3 average salary multiplied by your years of creditable service and a 1% multiplier. Employees who retire at age 62 or later with at least 20 years of service receive a slightly enhanced 1.1% multiplier.

For a federal employee earning $100,000 per year with 30 years of service, that calculation produces an annual federal pension of approximately $30,000. In other words, the pension replaces about 30% of pre-retirement income.

For employees who have spent decades hearing that federal pensions are among the best retirement benefits available, that figure can come as a surprise.

Social Security helps fill part of the gap, but it was never intended to replace a full paycheck. While replacement rates vary based on earnings history, higher-income workers often find that Social Security replaces a smaller percentage of their pre-retirement income than they expected.

Even after combining a FERS pension with Social Security benefits, many retirees discover they still need another source of income to help maintain their desired lifestyle.

That is where the Thrift Savings Plan becomes critical.

For employees who contributed consistently, increased their savings over time, and maintained an appropriate investment strategy, the TSP can play a significant role in closing the gap between guaranteed income and retirement spending needs. For others, years of low contribution rates, limited participation beyond the agency match, or little attention to investment allocation can leave the account carrying more responsibility than it is prepared to handle.

Retirement timing can also have a meaningful impact. In some cases, working an additional year or two increases your federal pension, boosts future Social Security benefits, and provides more time for TSP assets to grow before withdrawals begin.

The three components of federal retirement income—your pension, Social Security, and the TSP—are designed to work together. The challenge is that many employees focus on each piece individually without evaluating how the pieces interact. A pension estimate, a TSP balance, and a projected Social Security benefit are useful numbers, but the more important question is whether they add up to the retirement lifestyle you want.

Understanding where your retirement picture may have gaps, and what options exist to address them, is exactly the type of planning that tends to be most valuable when it starts well before retirement arrives.

A Federal Retirement Consultant (FRC®) can help you evaluate your complete retirement income picture and understand how your pension, TSP, and Social Security benefits may work together to support your long-term goals. Schedule your complimentary benefits review today.

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