What does one more year add to a TFFR pension?
Each year of service adds 2% of your final average monthly salary to your benefit, for life: $100 a month on a $60,000 final average salary. If you'd retire before your unreduced date, the year also cuts the early reduction, because working adds a year to both your age and your service.
Your unreduced date is age 65 or earlier, depending on your tier: the Rule of 85 for Tier 1 Grandfathered, or the Rule of 90 from age 60 for the others (see early retirement). Buying service can add years without working them, and service is earned by hours worked: 700 hours in a fiscal year makes one year.
Our example
A Tier 2 teacher, age 59 with 28 years and a $60,000 final average salary. Age plus service is 87, short of the Rule of 90, and the teacher is under 60. Handbook p. 17, Eligibility For Benefit; p. 4, Dual Membership; NDCC 15-39.1-10(1); Valuation (2026) p. 36, Normal Retirement; Handbook p. 18, Early Retirement; NDCC 15-39.1-12; NDAC 82-05-04-01; Valuation (2026) p. 37, Early Retirement
| Retire at | Keep working | Stop and wait |
|---|---|---|
| 59 (now) | $2,127.97 cut 24.0012% | $2,127.97 cut 24.0012% |
| 60 | $2,667.99 cut 8.0004% | $2,351.98 cut 16.0008% |
| 61 | $3,000.00 cut 0% | $2,575.99 cut 8.0004% |
| 62 | $3,100.00 cut 0% | $2,800.00 cut 0% |
Keep working: one more year of service for each year, with the same final average salary (raises would add more). Stop and wait: service stays at 28. Single life amounts, our arithmetic from the TFFR rules.
Working 2 more years takes this teacher to age 61 with 30 years: no cut, and $3,000.00 a month instead of $2,127.97 now.
From the sources
- Each extra year of service adds 2% of your final average salary to the formula, and may move you closer to (or past) the Rule of 85 or 90, which removes the early reduction. Once you qualify for an unreduced benefit and have stopped working, waiting does not raise it.Handbook pp. 17-18; NDCC 15-39.1-10, -12
Questions
What does one more year of TFFR service add?
Another 2% of your final average monthly salary, every month for life. If you'd retire early, it also shrinks the early cut.
What if I stop working and just wait?
Your service stays the same, so the formula doesn't grow. But the early cut gets smaller each month you wait, until you reach your unreduced date. After that, waiting adds nothing.
Why does working longer help so much near the Rule of 90?
Each year you work adds a year to your age and a year to your service, so age plus service goes up by two. Waiting without working adds only one.
Source: Teachers' Fund for Retirement Member Handbook, 5/7/2026, pp. 4, 17-18, 18-19. Also: Retirement Guide (2023); Valuation (2026); NDCC 15-39.1-10, 15-39.1-12; NDAC 82-05-04-01. Last reviewed .