{
  "slug": "fers-pension-estimate",
  "title": "FERS Pension Estimate Calculator",
  "heading": "FERS Federal Pension Estimator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/fers-pension-estimate",
  "summary": "Estimate your Federal Employees Retirement System annuity.",
  "description": "FERS provides a defined-benefit pension calculated from your high-3 average salary (the highest average basic pay over any 3 consecutive years) multiplied by a benefit multiplier and your years of creditable service. The standard multiplier is 1% per year of service, but bumps to 1.1% per year if you retire at age 62 or later with at least 20 years of service — a meaningful difference worth timing around if you're close to that threshold. FERS is only one leg of federal retirement; the other two are Social Security (earned through FERS-covered work, which is Social Security-covered unlike old CSRS) and the Thrift Savings Plan. This calculator computes your estimated annual and monthly FERS annuity from your inputs, and separately flags whether you qualify for the higher 1.1% multiplier, so you can see the financial impact of retiring a few months earlier or later relative to that age-62 threshold.",
  "formula": "Annual pension = high-3 salary × years of service × multiplier (1% standard, 1.1% if age 62+ with 20+ years).",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=fers-pension-estimate",
  "inputs": [
    {
      "id": "high3",
      "label": "High-3 average salary",
      "kind": "number",
      "hint": null,
      "default": 95000,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "yearsService",
      "label": "Years of creditable service",
      "kind": "number",
      "hint": null,
      "default": 25,
      "unit": null,
      "min": 0,
      "max": 50
    },
    {
      "id": "retireAge",
      "label": "Age at retirement",
      "kind": "number",
      "hint": null,
      "default": 60,
      "unit": null,
      "min": 40,
      "max": 75
    }
  ],
  "outputs": [
    {
      "id": "annual",
      "label": "Estimated annual FERS pension",
      "format": "currency",
      "hint": null,
      "primary": true
    },
    {
      "id": "monthly",
      "label": "Estimated monthly FERS pension",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "multiplierPct",
      "label": "Multiplier used",
      "format": "percent",
      "hint": null,
      "primary": false
    },
    {
      "id": "bonus",
      "label": "Extra annual amount from 1.1% multiplier vs 1%",
      "format": "currency",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "High-3 average salary: 95000 $",
      "Years of creditable service: 25",
      "Age at retirement: 60"
    ],
    "outputs": [
      "Estimated annual FERS pension: $23,750",
      "Estimated monthly FERS pension: $1,979",
      "Multiplier used: 1.00%",
      "Extra annual amount from 1.1% multiplier vs 1%: $0"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter high-3 average salary ($).",
      "Enter years of creditable service.",
      "Enter age at retirement.",
      "Read your estimated annual fers pension on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "high3": 57000,
        "yearsService": 15,
        "retireAge": 40
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "high3": 95000,
        "yearsService": 25,
        "retireAge": 60
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "high3": 152000,
        "yearsService": 40,
        "retireAge": 75
      }
    }
  ],
  "limitations": [
    "Results are estimates before tax, fees, and inflation unless an input explicitly covers them.",
    "Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.",
    "This is educational maths, not financial advice. Check anything contractual with the lender or your accountant."
  ],
  "faq": [
    {
      "q": "What exactly is 'high-3' salary?",
      "a": "It's the average of your highest 36 consecutive months of basic pay, not necessarily your final three years — for most people whose pay steadily increased, this ends up being their last three years, but it can differ if you took a lower-paying role, went part-time, or had a pay-affecting change near retirement."
    },
    {
      "q": "Is FERS enough to retire on by itself?",
      "a": "No, FERS is deliberately designed as one of three pillars alongside Social Security and the Thrift Savings Plan (TSP), typically replacing only 30-40% of pre-retirement income on its own for a full career employee. Financial planning for federal retirement needs to account for all three sources together."
    },
    {
      "q": "Does an early retirement (like MRA+10) reduce my pension?",
      "a": "Yes, retiring under the Minimum Retirement Age plus 10 years of service provision but before meeting full unreduced retirement eligibility triggers a 5% per year reduction for every year you're under age 62, unless you meet an exception like MRA with 30 years or age 60 with 20 years, which allow immediate unreduced benefits."
    },
    {
      "q": "How does a FERS annuity get inflation adjustments?",
      "a": "FERS COLAs are smaller than CSRS or Social Security COLAs and only start at age 62 for most retirees (special provision retirees like law enforcement get them immediately), and they're calculated using a diet formula that caps the increase below the full CPI increase when inflation exceeds 2%."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/tsp-growth-calculator",
    "https://www.revenuelab.fyi/toolbox/military-bah-bas-takehome"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — FERS Pension Estimate Calculator (https://www.revenuelab.fyi/toolbox/fers-pension-estimate)"
}