High Three: FERS Calculator

Federal retirement estimator

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

See your FERS or CSRS pension worked out by OPM's own rules, every line of math shown. Sick leave, MRA+10, supplement, survivor, COLA and TSP, side by side. High Three estimates your federal retirement annuity the way OPM computes it, and shows every line of the math. THE NUMBER, WITH ITS MATH Enter your birth date, service computation date, high-3 and sick leave balance. High Three shows your monthly annuity for any retirement date, and under it every step: creditable service with sick leave converted by OPM's 2,087-hour chart, the 1.0% or 1.1% multiplier, the special-provision 1.7% formula, CSRS tiers and the 80% cap, the MRA+10 age reduction counted in full months, the survivor election. Each row names the OPM rule behind it. KNOW WHEN YOU CAN GO See your Minimum Retirement Age, your earliest unreduced date, and what an MRA+10, VERA, postponed or deferred retirement does to the number. SCENARIOS SIDE BY SIDE Retire at 57, 60 or 62. Postpone. Take the early-out. Save every version and compare them in one table. THE WHOLE PLAN TO AGE 95 FERS annuity supplement with the earnings test, survivor benefit, COLA under the FERS rule, TSP growth and withdrawals, Social Security at the age you choose, other income, your deductions. A year-by-year table and chart, exportable as PDF or CSV. FERS, CSRS AND CSRS OFFSET Regular employees, law enforcement, firefighters, CBP officers, nuclear couriers and air traffic controllers. Part-time service proration. Lump-sum annual leave. YOURS, OFFLINE, ONE PRICE No account. No ads. Nothing uploaded. iPhone and iPad with one purchase. The free version shows your eligibility and gross annuity for one scenario; one purchase of $6.99 unlocks everything, for good. No subscription. High Three is an estimator, not advice, and is not affiliated with OPM or any federal agency. Your agency and OPM compute your actual annuity.

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Fresh screenshots and a new preview. Small fixes and polish.

Version 1.0.1

The developer, Benjamin Jacobs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Information

    Seller
    Benjamin Jacobs
    Size
    2.3 MB
    Category
    Finance
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Swell & Stack Co. LLC
  • Developer Website
  • Privacy Policy

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