Indiana · TRF · Buying service credit

Buying Indiana TRF service: airtime and more

Each year you buy adds 1.1% of your final average to your pension. The cost depends on your age, service and pay.

Indiana specificsShort answer: each year you buy adds 1.1% of your final average to your pension for life: $550 a year on $50,000. Once vested, you can buy up to 1 year of "airtime" for every 5 years you've earned. Bought years raise your pension but don't count toward the 10 years you need to vest (see leaving teaching). Compare with working one more year, or add years to the handbook example in the calculator.

Airtime

Once vested, buy up to 1 year of 'airtime' for every 5 years of earned service, in 1/12-year steps; lump sum or annual payments over 5 years with interest. Cost depends on age, service and salary. Hybrid Handbook p. 22, Purchase 'Airtime' Service Credit (Examples)

Hybrid Handbook p. 22, Purchase 'Airtime' Service Credit (Examples)

Other service you can buy

You must be in a covered position with at least 10 years to purchase; 1 year for each 5 years of covered employment; IRC 415 limits apply. Purchased service counts in the formula but not for vesting. Out-of-state, private school (accredited Indiana), substitute and military (up to 2 years) service may be bought at actuarial cost. Cost quotes are valid 30 days. Refunded with interest if you leave before you can retire and withdraw your DC. Hybrid Handbook pp. 19-22, §4.7

Members before July 1, 1981 with out-of-state service before then may add up to 8 years at no cost after 10 years of Indiana teaching. Hybrid Handbook p. 15, Out of State Service Credit

What a year adds

$550 a year ($45.83 a month) on a $50,000 final average. INPRS gives the cost; its quote is good for 30 days. Hybrid Handbook p. 29, §7 Pension Benefits; p. 30, §7.4 Table 1 Pension Benefit Calculation Worksheet Example; Hybrid Handbook pp. 19-22, §4.7

From the sources

Questions

How much airtime can I buy?

Up to 1 year for every 5 years you've earned, once you have 10 years. With 15 years, that's 3.

Does purchased service help me vest?

No. It raises your pension but doesn't count toward the 10 years.

What does a year add?

1.1% of your final average salary a year: $550 on a $50,000 average.

Source: Teachers' Retirement Fund Hybrid Plan Member Handbook, Effective 07/01/2025, pp. 15, 19-22, 22, 29, 30. Last reviewed .