{
  "slug": "csrs-pension-estimate",
  "title": "CSRS Pension Estimate Calculator",
  "heading": "CSRS Federal Pension Estimator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/csrs-pension-estimate",
  "summary": "Estimate your Civil Service Retirement System annuity for pre-1984 federal hires.",
  "description": "The Civil Service Retirement System (CSRS) is the older federal pension system, largely closed to new hires after 1983 when FERS was introduced, but it still covers many federal retirees today. CSRS uses a tiered multiplier applied to your high-3 average salary: 1.5% per year for the first 5 years, 1.75% per year for years 6 through 10, and 2% per year for every year beyond 10 — a much richer formula than FERS's flat 1%, which is why CSRS employees generally don't get Social Security credit for their CSRS-covered federal service and don't receive a TSP match. This calculator applies the tiered CSRS formula to your years of service and high-3 salary to estimate your annual and monthly annuity, capped at the statutory maximum of 80% of high-3 salary.",
  "formula": "Annuity = high-3 × (1.5% × first 5 yrs + 1.75% × next 5 yrs + 2% × remaining yrs), capped at 80% of high-3.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=csrs-pension-estimate",
  "inputs": [
    {
      "id": "high3",
      "label": "High-3 average salary",
      "kind": "number",
      "hint": null,
      "default": 90000,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "yearsService",
      "label": "Years of creditable service",
      "kind": "number",
      "hint": null,
      "default": 30,
      "unit": null,
      "min": 0,
      "max": 50
    }
  ],
  "outputs": [
    {
      "id": "annual",
      "label": "Estimated annual CSRS annuity",
      "format": "currency",
      "hint": null,
      "primary": true
    },
    {
      "id": "monthly",
      "label": "Estimated monthly CSRS annuity",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "pctUsed",
      "label": "Replacement percentage of high-3 (capped)",
      "format": "percent",
      "hint": null,
      "primary": false
    },
    {
      "id": "uncappedPct",
      "label": "Uncapped calculated percentage",
      "format": "percent",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "High-3 average salary: 90000 $",
      "Years of creditable service: 30"
    ],
    "outputs": [
      "Estimated annual CSRS annuity: $50,625",
      "Estimated monthly CSRS annuity: $4,219",
      "Replacement percentage of high-3 (capped): 56.3%",
      "Uncapped calculated percentage: 56.3%"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter high-3 average salary ($).",
      "Enter years of creditable service.",
      "Read your estimated annual csrs annuity 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": 54000,
        "yearsService": 18
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "high3": 90000,
        "yearsService": 30
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "high3": 144000,
        "yearsService": 48
      }
    }
  ],
  "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": "Can new federal employees still enroll in CSRS?",
      "a": "No, CSRS closed to new hires starting January 1, 1984 when FERS was created, so essentially all remaining CSRS annuitants were hired before that date. Some rare CSRS Offset employees exist as a transitional category, blending CSRS benefits with Social Security coverage."
    },
    {
      "q": "Why is the CSRS formula so much richer than FERS?",
      "a": "CSRS was designed as the primary and often sole retirement benefit for federal employees who don't earn Social Security credits on their CSRS-covered service, so the pension itself needed to replace a much larger share of pre-retirement income compared to FERS, which is just one leg of a three-part retirement system alongside Social Security and TSP."
    },
    {
      "q": "Do CSRS annuitants get full cost-of-living adjustments?",
      "a": "Yes, CSRS annuities receive the full CPI-based COLA every year with no reduction, unlike FERS annuities which use a diet COLA formula that caps increases below full CPI when inflation exceeds 2%, and unlike FERS, CSRS COLAs start immediately regardless of age."
    },
    {
      "q": "Is there a maximum CSRS annuity?",
      "a": "Yes, the annuity is capped at 80% of your high-3 average salary, which is reached at 41 years and 11 months of creditable service under the standard formula, though additional unused sick leave can still convert to extra service credit beyond that cap in certain circumstances."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/fers-pension-estimate",
    "https://www.revenuelab.fyi/toolbox/tsp-growth-calculator"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — CSRS Pension Estimate Calculator (https://www.revenuelab.fyi/toolbox/csrs-pension-estimate)"
}