Last Updated: September 9, 2026 Reading Time: 8 min

The FERS 1.1% multiplier is the only rule in the federal retirement formula that pays a flat 10% more pension for life, and it hinges on a single day. Retire at 62 with 20 years and every year of service is worth 1.1% of your High-3 instead of 1.0%. Retire the day before, and none of them are. We computed what that is worth at four salary levels, and how long it takes the extra year to pay for itself.

The Rule, Exactly as OPM Applies It

Under 5 U.S.C. 8415, the standard FERS annuity is 1% of your High-3 average salary for each year of creditable service. Subsection (i) raises that to 1.1% for an employee who separates at age 62 or older with at least 20 years of service. OPM's computation page states it the same way: "Age 62 or Older at Separation With 20 or More Years of Service."

Three details in that sentence decide who qualifies.

"At separation." The test is your age and service on your last day, not when the annuity starts. This is what separates an immediate retirement at 62 from a deferred one that begins at 62.

"20 or more years." Not 20 years under FERS specifically. Creditable service counts, including military time you bought back, and, for the computation only, unused sick leave.

"1.1 percent" applies to every year. The higher rate does not kick in only for years past 20 or past 62. A 30-year career at 62 computes at 1.1% on all 30 years. That is why the gain is a clean 10%, every time, for everyone who qualifies.

The all-or-nothing edge is what costs people money. An employee who separates at 61 years and 11 months with 30 years gets 1.0% on all 30 years. There is no rule that awards 1.1% on the years after some cutoff. The 1.1% multiplier does not care how close you were.

What the 1.1% Multiplier Is Worth in Dollars

The percentage is fixed. The dollar amount depends on your High-3 and your years. We ran the formula (multiplier × High-3 × years) across four salaries and four service lengths.

High-3 Years Pension at 1.0% Pension at 1.1% Gain per year
$80,000 20 $16,000 $17,600 $1,600
$80,000 25 $20,000 $22,000 $2,000
$80,000 30 $24,000 $26,400 $2,400
$80,000 35 $28,000 $30,800 $2,800
$100,000 20 $20,000 $22,000 $2,000
$100,000 25 $25,000 $27,500 $2,500
$100,000 30 $30,000 $33,000 $3,000
$100,000 35 $35,000 $38,500 $3,500
$120,000 20 $24,000 $26,400 $2,400
$120,000 25 $30,000 $33,000 $3,000
$120,000 30 $36,000 $39,600 $3,600
$120,000 35 $42,000 $46,200 $4,200
$150,000 20 $30,000 $33,000 $3,000
$150,000 25 $37,500 $41,250 $3,750
$150,000 30 $45,000 $49,500 $4,500
$150,000 35 $52,500 $57,750 $5,250

The table shows two things. First, a GS-13 finishing around a $120,000 High-3 with 30 years is looking at $3,600 a year, $300 a month, for the rest of their life, and COLAs compound on top of it. Second, the gain is the same 10% whether you have 20 years or 35, so the rule matters just as much to someone who came in at 42 as to a 35-year lifer.

The Break-Even: What Waiting From 61 to 62 Costs and Pays

The table above is the easy part. The real question for most people is different: they are 61, already eligible for an unreduced annuity, and deciding whether one more year is worth it.

Waiting costs two things. You give up one year of the pension you could have been collecting. You also give up one year of the FERS Special Retirement Supplement, because the supplement stops at 62 no matter when you retired. Retiring at 61 captures that year; retiring at 62 forfeits it permanently.

Waiting pays two things. The 1.1% rate on every year, plus one more year of service in the formula.

We modeled a 30-year employee at 61 choosing between retiring now and retiring at 62 with 31 years. The supplement figures use illustrative age-62 Social Security estimates for each salary tier ($1,867 to $2,267 a month), times 30/40. Your own Social Security statement will differ, so treat the supplement column as representative, not personal.

High-3 Pension at 61 (1.0% × 30) One year of supplement Cost of waiting Pension at 62 (1.1% × 31) Gain per year Break-even
$80,000 $24,000 $16,800 $40,800 $27,280 $3,280 12.4 years
$100,000 $30,000 $18,000 $48,000 $34,100 $4,100 11.7 years
$120,000 $36,000 $19,200 $55,200 $40,920 $4,920 11.2 years
$150,000 $45,000 $20,400 $65,400 $51,150 $6,150 10.6 years

Break-even is the cost of waiting divided by the annual gain. At every salary, the extra year pays for itself after roughly 11 to 12 years of collecting the bigger pension. Past that point, every additional year is pure upside from having waited. A 62-year-old with normal life expectancy clears it comfortably. Someone with health reasons to doubt a 12-year horizon is making a closer call than the usual "always wait for 62" advice suggests.

Three things the model leaves out, all of which tilt toward waiting: COLAs start immediately at 62 and compound on the larger base, one more year of TSP contributions and match, and one more year of a paycheck that is larger than the pension it replaces. One thing it leaves out that tilts the other way: the 61-year-old retiree could invest or spend a year of income sooner. Our one-more-year real-pay analysis prices that hour-by-hour.

The Deferred Retirement Trap

Most explainers skip this edge case, and it can catch someone who plans a break in service.

A deferred retirement means you leave federal service before you are eligible for an immediate annuity, then apply for the pension later, at 62 with 5 years or at your MRA with 10. OPM's types of retirement page says a deferred annuity is based on the length of service and High-3 "in effect when you separated from Federal service."

Put that next to the 1.1% rule and the problem shows up. The multiplier requires age 62 at separation. A deferred retiree was, by definition, not eligible for an immediate annuity when they left, so they were not 62 with 20 years on that day. Starting the payments at 62 does not change the day you separated. The annuity computes at 1.0%.

OPM does not publish this as a single explicit sentence, and it is a reading of two OPM pages plus the statute. Treat it as a strong warning rather than a guarantee, and get a written annuity estimate from your HR office before you separate at 55 with 22 years planning to "collect the 1.1% at 62." Our deferred versus postponed guide covers the rest of that decision, including the FEHB consequences that matter more than the multiplier.

Sick Leave Counts, But Only for the Math

Unused sick leave converts to service credit at 174 hours per month and is added to your total for the computation. OPM confirmed in Benefits Administration Letter 18-103 that this includes the 20-year test for the 1.1% rate. An employee at 62 with 19 years and 6 months of actual service and 1,044 hours of sick leave (six months) clears 20 years and computes at 1.1%.

The same letter draws the line that trips people up. Sick leave can never establish eligibility to retire. You must be eligible on actual creditable service alone first. Only then is the sick leave added, and only then does it help with the multiplier. The Sick Leave Conversion Calculator turns your balance into months and days so you can see whether it closes a gap.

Who the Rule Does Not Help

Special-provision employees. Law enforcement officers, firefighters, and air traffic controllers compute their first 20 years at 1.7% and years beyond that at 1.0%. The 1.1% rate can modify only that second block, and only for someone who is 62 with 20 or more total years at separation. Mandatory retirement at 56 or 57 makes that combination rare.

Disability retirees. FERS disability annuities use a separate formula (60% of High-3 in year one, 40% afterward, offset by Social Security disability, recomputed at 62). The 1.1% rate never enters it.

Anyone counting on the supplement past 62. The FERS supplement is not payable to anyone retiring at 62 or later, because Social Security eligibility begins at 62. Waiting for the 1.1% rate and giving up a year of the supplement are one decision, not two. Our supplement-to-Social-Security timing guide covers the handoff, and the earnings-limit guide covers the $24,480 test that applies if you work after retiring before 62.

Model Your Own 61-vs-62 Decision

Use our free FERS Retirement Date Optimizer to run retire-now against wait-until-62 with your real High-3, service, and sick leave, side by side. Compare your dates →

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