Bottom line
For a standard Defined Benefit retirement under current STRS Ohio rules, the core estimate is 2.2% of final average salary for each year of service, with FAS based on the five highest years of Ohio public earnings.Key facts
- 2.2% is the basic multiplier applied to each year of service under the current standard formula.
- 5 highest years of Ohio public earnings are used for current final average salary calculations.
- 32 years of service would produce a 70.4% formula level before any applicable reduction or payment-option adjustment.
Build the estimate from service credit, five-year FAS and the 2.2% multiplier
STRS Ohio describes its current Defined Benefit calculation as a salary-related formula using age at retirement, total service credit and final average salary. The basic unreduced formula multiplies all years of service by 2.2% and then applies that percentage to FAS. For example, 32 years multiplied by 2.2% produces a 70.4% formula level. That percentage is then multiplied by the member’s FAS to estimate an annual Single Life Annuity before considering any early-retirement reduction or alternate payment option.
Final average salary is not simply the last contract salary. STRS Ohio currently describes FAS as the average of the five highest years of Ohio public earnings, which do not have to be the final five consecutive years. A late-career salary dip therefore does not automatically replace an earlier higher year. Members should compare the five earnings years STRS Ohio actually uses with payroll records, especially after job changes, part-time service, or unusual compensation near retirement.
The percentage is only the starting formula, not a guaranteed take-home amount
A formula such as 70.4% of FAS is useful for orientation, but it is not a promise that every member with 32 years receives exactly that share in cash. Reduced retirement can apply an actuarial factor, and choosing a joint-and-survivor or other payment plan can change the monthly amount compared with the Single Life Annuity. Taxes, insurance premiums, and other deductions are separate from the gross benefit calculation. The official estimate is therefore the appropriate number for an actual filing decision.
The Defined Contribution and Combined plans also require different math. The Defined Contribution Plan depends on account contributions, investment performance, and annuity rates rather than the DB salary formula. The Combined Plan has both defined benefit and defined contribution components. A teacher who selected something other than the Defined Benefit Plan should not paste the 2.2% formula onto the entire retirement account and treat the result as an STRS Ohio estimate.
Ohio law constrains what compensation can enter final average salary
Ohio Revised Code §3307.501 contains anti-spiking rules for final average salary. Certain unusually large percentage increases in compensation during high-earning years can be excluded when they exceed the statutory comparison tests, unless they are part of a generally applicable increase. That means a last-minute raise, supplemental duty, or unusual payout should not automatically be assumed to lift FAS dollar for dollar. STRS Ohio determines what compensation is includable under the statute and system rules.
For planning, the cleanest process is to separate three questions: which years are the five highest includable earnings years, how much service credit will exist on the retirement date, and whether the retirement is reduced. Once those inputs are verified, the 2.2% formula becomes transparent. If an online estimate differs from a hand calculation, the difference often comes from one of those inputs rather than a hidden multiplier.
Calculate the core percentage before inserting salary
The cleanest hand calculation begins with service. Multiply total years of service by 2.2% to get the formula percentage. Thirty years produces 66%; 32 years produces 70.4%; 35 years produces 77%. Only after that step should the percentage be multiplied by FAS. This order makes it easier to spot a service-credit error and keeps the salary average from obscuring the underlying pension formula.
Fractions of service can matter, so the official record is more precise than rounding to whole school years. Purchased or restored credit can increase both the formula percentage and, in some cases, retirement eligibility. A member evaluating a purchase should compare the cost with the difference in the official retirement estimate rather than simply multiplying the purchased year by 2.2%, because a threshold effect can be larger than the formula increment alone.
| Service | 2.2% formula level |
|---|---|
| 25 years | 55.0% of FAS |
| 30 years | 66.0% of FAS |
| 32 years | 70.4% of FAS |
| 35 years | 77.0% of FAS |
Audit the five earnings years that make up FAS
STRS Ohio currently describes final average salary as the average of the five highest years of Ohio public earnings. A teacher should list the five years shown in the official estimate and compare each amount with the annual statement or employer payroll history. If a partial year, supplemental contract or late-career assignment appears unusual, ask how it was treated before assuming the online estimate is wrong.
Ohio law also limits certain compensation increases for FAS purposes. Section 3307.501 can exclude amounts resulting from unusually large percentage increases in high-compensation years when the statutory tests are met, while generally applicable increases receive different treatment. This anti-spiking rule is one reason the highest W-2 amounts are not necessarily identical to the earnings STRS Ohio will use in the pension calculation.
| Question | Record to compare |
|---|---|
| Which five years were selected? | STRS Ohio estimate |
| Were earnings posted correctly? | Annual statement/payroll |
| Was an unusual raise limited? | §3307.501 treatment |
| Is a partial year involved? | STRS Ohio calculation record |
Apply early-retirement and payment-option adjustments only after the base formula
The 2.2% calculation describes the base DB formula. If the retirement is under a reduced eligibility path, STRS Ohio applies an actuarial reduction. After that, the chosen payment plan can further alter the monthly amount if survivor protection is provided. Mixing these steps together creates confusing percentages. Keep a worksheet with separate lines for formula benefit, early-retirement adjustment and payment-option adjustment so each difference has an identifiable source.
The same separation helps couples compare options. A joint-and-survivor form may produce a lower member payment but provide continuation after death; a Single Life Annuity generally focuses on the member’s lifetime payment. Those are payment-structure decisions, not changes to service credit or FAS. The official retirement estimate should be run under the exact payment option being considered so the comparison is apples to apples.
| Step | Input |
|---|---|
| 1 | Service × 2.2% |
| 2 | Multiply by five-year FAS |
| 3 | Apply early-retirement factor if needed |
| 4 | Apply payment-option structure |
Before you make a decision
- Confirm your STRS Ohio plan type.
- List the official service-credit total.
- Verify the five FAS earnings years.
- Calculate service × 2.2% before reductions.
- Run the same retirement date in the official calculator.
Frequently asked questions
What is the current STRS Ohio Defined Benefit multiplier?
STRS Ohio currently describes the standard salary-related formula as 2.2% of final average salary for each year of service. The base formula is then subject to any early-retirement reduction and the retirement payment option selected. Members with older grandfathered rights may have special calculations, so use the official estimate.
How many years are used for STRS Ohio final average salary?
STRS Ohio currently uses the five highest years of Ohio public earnings for FAS. They do not have to be the last five years. Ohio Revised Code §3307.501 also contains rules that can limit unusual compensation increases when determining FAS, so raw salary history and includable FAS compensation may differ.
What percentage of FAS is 32 years under the 2.2% formula?
Thirty-two years multiplied by 2.2% equals a 70.4% formula level. Multiplying 70.4% by the member’s FAS gives a basic annual benefit estimate before an early-retirement factor or payment-option adjustment. The STRS Ohio calculator should be used to confirm the actual benefit for a specific date.
Does STRS Ohio use the 2.2% formula for the Defined Contribution Plan?
No. The Defined Contribution Plan bases retirement income on account contributions, investment performance and annuity rates. The 2.2% salary-related formula is a Defined Benefit concept. The Combined Plan has a defined benefit portion and a defined contribution portion, so both types of math may apply to that member.
Can a large final-year raise automatically increase STRS Ohio FAS?
Not necessarily. Ohio Revised Code §3307.501 includes limits on certain percentage increases in compensation used for FAS, while generally applicable increases are treated differently. Members with unusual late-career compensation should compare the official STRS Ohio FAS calculation with payroll records rather than assuming every dollar is includable.
Official sources
Sources were reviewed on September 2, 2026. Rules and member records maintained by the retirement system control.
STRS Ohio — 2026 Retirement Eligibility ExtensionOfficial source ↗STRS Ohio — Plan OptionsOfficial source ↗Ohio Revised Code §3307.501Official source ↗This article provides general educational information. It is not a benefit determination or financial, tax, or legal advice. Confirm account-specific information with the retirement system.