Enter Your Retirement Income

Your annual FERS annuity payment (Form 1099-R Box 1)
Total after-tax contributions you made to FERS (shown on OPM statements)
Amount you plan to withdraw from Thrift Savings Plan annually
Roth withdrawals are tax-free if qualified
Your annual Social Security benefit amount
Part-time work, investment income, rental income, etc.
Some states exempt federal pension income from state taxes
Affects standard deduction and potential penalties

Understanding FERS Pension Taxation

FERS pensions are partially taxable depending on whether you made after-tax contributions to the retirement system. Here's how it works:

The General Rule

  • FERS employees hired after 1983: All contributions were pre-tax, so 100% of your pension is taxable
  • Employees with CSRS service: If you had CSRS service before 1987, part of your pension may be tax-free
  • Military buyback: Payments for military service credit are after-tax, creating a small tax-free portion

Social Security Taxation

Up to 85% of your Social Security benefits may be taxable depending on your "combined income":

  • Combined Income = Adjusted Gross Income + Nontaxable Interest + 50% of Social Security
  • Single filers: 0% taxable if under $25,000; 50% taxable if $25,000-$34,000; 85% taxable if over $34,000
  • Joint filers: 0% taxable if under $32,000; 50% taxable if $32,000-$44,000; 85% taxable if over $44,000

Educational use only: Results are estimates. For official benefit determinations, use your agency HR/OPM retirement services—not this page alone.

Retirement tax planning for federal pensions

Use the sections below to align this calculator with your real planning questions—each block matches a common search intent.

Pension taxation

Most FERS pensions are fully taxable federally; after-tax contributions create a tax-free portion.

TSP and SSA

Traditional TSP withdrawals are generally taxable; Social Security may be 0–85% taxable.

State residency

Some states exempt federal pensions—verify domicile rules.

Not tax advice

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Authority & primary sources

Official rules change periodically. Cross-check estimates with Retirement Services at OPM.gov and your agency’s human resources office.

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