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New Jersey · TPAF · Methods & sources

How we estimate TPAF pensions

Every number on the New Jersey pages comes from the NJDPB's own publications or the statute. Here's what the calculator does, where each rule comes from, and what it leaves out.

Each step has a plain-English guide: tiers, the formula, early retirement and payment options. To try them with your own numbers, open the calculator.

  1. 1

    Find your tier

    You enter the date you were first eligible to enroll, or pick your tier. The date decides the tier: before July 1, 2007 is Tier 1, and so on to Tier 5 from June 28, 2011.

    Guidebook p. 7, TPAF Membership Tiers
  2. 2

    Project your service

    We add the time from today to your retirement date to the service you enter, one year per year. If you tell us you've already left, your service stays the same.

    Our assumption (see below)
  3. 3

    Check the retirement rules

    On your retirement date we test your age against your tier's service retirement age, then your service against the Early Retirement minimum (25 years; 30 in Tier 5). If you've left with 10+ years, we show a Deferred Retirement.

    Guidebook p. 25, Service Retirement; N.J.S.A. 18A:66-43(a)
  4. 4

    Apply the formula

    Years of service ÷ 55 (Tiers 1-3) or ÷ 60 (Tiers 4-5) × final average salary = your yearly Maximum Option. For Tiers 2-5 we cap the salary at the Social Security wage limit for your retirement year.

    Guidebook p. 25, Service Retirement
  5. 5

    Apply the early cut

    For each full month you're short of the reduction age, we cut by the tier's monthly rate: 1/12 of 1% or 1/4 of 1%. Tiers 2-4 have two steps that add up.

    Guidebook p. 25, Early Retirement
  6. 6

    Show options, COLA and health

    Option factors aren't published, so we show the Maximum in dollars and each option's survivor share in percent. COLAs are suspended, so the check stays flat. We point you to retiree health rules based on your service.

    Guidebook pp. 29-31; Planning Guide p. 7

What the calculator doesn't cover

Assumptions you should know

The "work longer" comparison keeps your final average salary the same. TPAF retirements start on the first of a month, so use a first-of-month date. Ages are in years and whole months on that date. Service grows one year per year from today unless you've left.

How we check the math

The calculator runs on a small engine that reads every rule from one data file, with a cite for each rule. Automated tests check it against the NJDPB's printed examples every time the site is built.

How we check the math (New Jersey TPAF)
NJDPB examplePrintedOur enginePage
Mary Jones, Maximum Option, a year$31,554.55$31,554.55pp. 7-8 Match
Mary Jones, Maximum Option, a month$2,629.55$2,629.55pp. 7-8 Match
Option A (100% pop-up), beneficiary's share$2,248.26$2,248.26p. 7 Match
Option B (75% pop-up), beneficiary's share$1,765.08$1,765.08p. 7 Match
Option C (50% pop-up), beneficiary's share$1,235.89$1,235.89p. 7 Match
Option D (25% pop-up), beneficiary's share$638.32$638.32p. 7 Match
Option 2 (100% joint and survivor), beneficiary's share$2,274.56$2,274.56p. 7 Match
Option 3 (50% joint and survivor), beneficiary's share$1,242.46$1,242.46p. 7 Match
Purchase example (age 45, 1.5 years)$4,388.49$4,388.49Guidebook p. 16 Match
Purchase example, full cost$8,776.98$8,776.98Guidebook p. 16 Match
Tier 1 early at 54, % kept97%97%Planning Guide p. 6 Match
Tier 2 early at 54, % kept92%92%Planning Guide p. 6 Match
Tier 2 early at 57, % kept97%97%Planning Guide p. 6 Match
Tier 3 or 4 early at 54, % kept92%90%Planning Guide p. 6 Check with NJDPB
Tier 3 or 4 early at 57, % kept95%95%Planning Guide p. 6 Match
Tier 5 early at 57, % kept76%76%Planning Guide p. 6 Match
Tier 5 early at 63, % kept94%94%Planning Guide p. 6 Match

The one row that differs is the planning guide's Tier 3/4 example at age 54. Its printed 92% doesn't fit the guidebook's own rule, which gives 90%. We use the rule.

Things to check with the NJDPB

The NJDPB's publications don't settle these points. Each is labeled "Check with NJDPB" where it shows up on the site. Here's what we do about each one.

Check with NJDPB

New Jersey doesn't publish the reduction for each payment option. The one published example (a 59-year-old with a 60-year-old spouse) keeps about 85.5% of the Maximum under Option A and 94% under Option C.

We show the Maximum amount and the survivor share of each option, and the published example. We don't estimate option amounts for other ages.

Guidebook pp. 29-30; Planning Guide p. 7
Check with NJDPB

The early-retirement cut is figured per month short of the age. If your birthday falls mid-month, the sources don't say whether that part month counts.

Whole months only (a part month isn't counted), so the estimate could be up to one month's reduction (0.08% or 0.25%) too high.

Guidebook p. 25; N.J.S.A. 18A:66-37
Check with NJDPB

Tier 3 has a minimum salary to join that changes each year. We don't have this year's figure.

Not used by the calculator.

N.J.S.A. 18A:66-4(b)(3); Guidebook p. 7
Check with NJDPB

Tier 1 salary is capped only by a high federal limit ($360,000 in 2026).

We warn when a Tier 1 FAS is over $360,000.

Fact Sheet #79 p. 1; Guidebook p. 10
Check with NJDPB

If your salary is above the Social Security wage limit, each year counts only up to that year's limit, and the limit changes in January. How NJ applies it to a July-June year isn't spelled out.

The FAS helper caps each year at the limit of the calendar year you assign to it; the estimate caps FAS at the limit for the retirement year (or the latest known year).

Fact Sheet #79 p. 1; Guidebook p. 25
Check with NJDPB

Teachers who had fewer than 20 years on June 28, 2011 pay part of their retiree health premium, based on pension size and coverage level, at least 1.5% of the monthly pension.

The percentage-of-premium chart with a 1.5% of allowance minimum, labeled as an estimate; you supply the full premium.

Health Benefits SPD pp. 10-12; Fact Sheet #11 pp. 3-4
Check with NJDPB

The NJDPB says your pension isn't reduced by Social Security. Its materials suggest teachers pay Social Security tax, but don't say so directly.

We state only that the TPAF pension isn't reduced by Social Security.

Guidebook p. 34; Planning Guide pp. 3-4
Check with NJDPB

A deferred pension starts the first of the month after you reach the age.

The first of the month after the birthday month for deferred; the birthday itself if it is the 1st for service retirement.

Guidebook p. 26, p. 31

Where the sources disagree

Sources

Guidebook page numbers are printed page numbers. Statute sections are from the New Jersey Legislature's official statutes text download. Last reviewed Nov. 12, 2026.

Found a mistake?Email hello@teacherpensioncalculator.com with the page, what you entered, and what the NJDPB told you. We fix confirmed errors and note the change.
The official numbersOnly the NJDPB can tell you your actual benefit. Use MBOS (Member Benefits Online System) or call the NJDPB at 609-292-7524.

Source: TPAF Member Guidebook, July 2026 (SP-0733-0726), pp. 7, 10, 16, 25-27, 29-31, 34. Also: Retirement Planning Member Guidebook (March 2025), pp. 3-4, 7-8, 27. Also: NJDPB Fact Sheet #79 (Feb. 2026), p. 1. Also: SHBP/SEHBP Summary Program Description (Oct. 2026), pp. 10-12. Also: NJDPB Fact Sheet #11 (Oct. 2026), pp. 3-4. Statute: N.J.S.A. 18A:66-37, 18A:66-4, 18A:66-43. Last reviewed .