New Jersey PERS Retirement Calculator: How to Use It
New Jersey PERS has five tiers with two formulas, two FAS windows and three retirement ages. The COLA has been suspended since 2011. Your tier sets almost everything about your benefit.
What this calculator does
It estimates your PERS maximum allowance (the single-life option, before any survivor option) using the rules in the Division of Pensions and Benefits' PERS Member Guidebook. It applies your tier's formula (years / 55 for Tiers 1-3, years / 60 for Tiers 4-5), caps Tier 2-5 salary at the Social Security wage base, and works out whether leaving at your chosen age is a Service, Early or Deferred Retirement, or no pension at all.
The COLA has been suspended since June 28, 2011, so the number you see is the number you'd keep getting. Veteran Retirement, disability retirement and survivor options aren't modeled. Your official estimate comes from NJDPB through MBOS.
What each input means
Membership tier
Your tier depends on the date you were eligible to enroll. Tier 1: before July 1, 2007. Tier 2: July 1, 2007 through November 1, 2008. Tier 3: November 2, 2008 through May 21, 2010. Tier 4: May 22, 2010 through June 27, 2011. Tier 5: June 28, 2011 or later. Your member statement shows it.
Current age and years of PERS service so far
The calculator adds the years between now and your planned retirement age to the service you have today. Enter purchased service you've already bought. Partial years count, since the formula credits every month.
Final Average Salary
Tiers 1-3: your last 36 months of pensionable salary, or your three highest fiscal years if those are higher. Tiers 4-5: your last 60 months, or your five highest fiscal years. Overtime and pay given in anticipation of retirement don't count. If you're in Tier 2-5 and earn more than $184,500 (the 2026 Social Security wage base), the calculator caps your FAS there. Earlier years had lower caps, so the true figure may be a bit lower.
Planned retirement age
The age you'd leave and start your pension. If it's at or past your tier's Service Retirement age (60, 62 or 65), the pension is unreduced no matter how much service you have. Below that age you need 25 years (Tiers 1-4) or 30 years (Tier 5) to retire early with a reduction. With 10 to 24 years you can leave and file for a Deferred Retirement that starts at your Service Retirement age. With less than 10 years, PERS refunds your contributions instead.
Understanding the outputs
For Tiers 1-3 the math is years / 55 x FAS. A Tier 2 member with 28 years and a $75,000 FAS gets 28/55 x $75,000 = $38,182 a year. A Tier 4 or Tier 5 member with the same numbers gets 28/60 x $75,000 = $35,000, about $3,200 a year less.
Early retirement reductions are permanent and counted by the month. Tier 1 has none from 55 to 60 and 3% a year below 55, so a Tier 1 member with 25 years leaving at 52 loses 9%. Tier 2 loses 1% a year from 60 down to 55, Tiers 3 and 4 lose 1% a year from 62 down to 55, and both add 3% a year below 55. A Tier 4 member leaving at 57 loses 5%. Tier 5 loses 3% a year below 65, so 30 years at 60 means a 15% cut.
The no-COLA column is current law. The 2% column is a what-if, since the law sets no rate for a reactivated COLA. CPI-U rose about 48% from August 2011 to August 2026, which is why a frozen pension buys roughly a third less than it did when the suspension began.
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Frequently asked questions
What is the difference between New Jersey PERS Tier 1, 2, 3, 4, and 5?
Tiers 1-3 use years of service / 55 (about 1.82% a year) with a 3-year FAS. Tiers 4 and 5 use years / 60 (about 1.67% a year) with a 5-year FAS. Unreduced Service Retirement starts at 60 for Tiers 1-2, 62 for Tiers 3-4 and 65 for Tier 5. Tiers 2-5 also have pensionable pay capped at the Social Security wage base.
When can I retire under New Jersey PERS?
At your tier's Service Retirement age (60, 62 or 65) with any amount of service. Earlier, at any age, with 25 years (Tiers 1-4) or 30 years (Tier 5), with a reduction: Tier 1 none from 55 up and 3% a year below 55; Tier 2 1% a year from 60 to 55; Tiers 3-4 1% a year from 62 to 55; plus 3% a year below 55 for Tiers 2-4; Tier 5 3% a year below 65. With 10+ years but not enough for early retirement, you can take a Deferred Retirement that starts at your tier's Service Retirement age.
How is the Final Average Salary calculated for New Jersey PERS?
Tiers 1-3: the average of your last 36 months, or your three highest fiscal years (July to June) if those are higher. Tiers 4-5: your last 60 months or five highest fiscal years. Overtime, retirement incentive pay and allowances for housing, clothing or uniforms don't count. For Tiers 2-5, salary above the Social Security wage base ($184,500 in 2026) doesn't count either.
Why is the New Jersey PERS COLA suspended?
Chapter 78, P.L. 2011 suspended COLAs for all current and future retirees as of June 28, 2011. A pension committee may consider reactivating them once a system reaches its target funded ratio. That target is 80%, measured on the actuarial value of assets plus the special asset value. On that basis the State portion of PERS was 45.8% funded in the July 1, 2025 valuation, far below the target. Plan on a pension that stays flat in dollars.
Does New Jersey PERS coordinate with Social Security?
PERS positions are covered by Social Security, so you pay into it and collect it alongside the pension. There's no offset between the two. With the PERS COLA suspended, Social Security is the part of your retirement income that adjusts for inflation, which makes your claiming age worth planning.