Your OMERS pension is not calculated from the balance of your contributions. OMERS uses a defined benefit formula, which makes your earnings history and pension service more important than the dollar amount deducted from your pay over your career. Your OMERS lifetime pension is calculated using your credited service, your average earnings during your highest-paid 60 consecutive months and the Average Year’s Maximum Pensionable Earnings (AYMPE). If you start your pension before age 65, a separate bridge benefit may also apply. Your retirement age can affect whether an early-retirement reduction applies.
- The OMERS Lifetime Pension Formula
- What Counts as Your Best-Five Earnings?
- Credited Service Determines How Many Years Enter the Formula
- How the OMERS Bridge Benefit Changes Payments Before 65
- Starting Your OMERS Pension Early Can Change the Calculation
- Part-Time OMERS Pensions Need an Extra Calculation
- Your Contributions Do Not Directly Determine Your Pension Amount
- How to Get an Estimate of Your Own OMERS Pension
- Other Questions About OMERS Pension Calculations
The OMERS Lifetime Pension Formula
The annual lifetime pension is calculated as:
2% × credited service × best-five earnings
minus
0.675% × credited service × the lesser of your best-five earnings or AYMPE
The result is your annual lifetime pension before any applicable early-retirement reduction. It is the portion designed to continue for the rest of your life after retirement.
The AYMPE in this calculation means the average of the Year’s Maximum Pensionable Earnings (YMPE) over the five-year period determined when the benefit is calculated. OMERS uses the lesser of your AYMPE or best-five earnings in the second part of the formula. OMERS lifetime pension formula
This formula also helps explain why an OMERS pension should not be confused with an investment account. The pension is based on predetermined benefit rules. The broader structure is covered in how OMERS works.
What Counts as Your Best-Five Earnings?
Your best-five earnings are the annual average of your highest 60 consecutive months of contributory earnings. They do not have to be the final five calendar years before you retire. OMERS looks for the highest consecutive 60-month period available in your pension record.
Only contributory earnings count. Regular and recurring earnings are generally included, but overtime and most one-time or lump-sum payments are excluded. That means a year with unusually high overtime does not automatically increase the earnings figure used in your pension formula. OMERS rules for contributory earnings
If you have less than five years of credited service, OMERS uses your actual credited service to determine your average earnings rather than requiring a full five-year history.
Credited Service Determines How Many Years Enter the Formula
Credited service is the amount of pension service that enters directly into the calculation. It generally includes the time you worked for an OMERS employer and contributed to the plan, plus eligible service that you purchased or transferred into OMERS. how credited service affects your OMERS pension
Because credited service is multiplied by the other components of the formula, adding pensionable service can increase the benefit. This is also why a qualifying OMERS service buyback can matter to the eventual calculation.
Credited service should not be confused with eligible service. Eligible service can help determine when you qualify for an unreduced early-retirement pension, but it does not itself enter the pension formula in the same way as credited service.
How the OMERS Bridge Benefit Changes Payments Before 65
Starting an OMERS pension before age 65 can add a temporary bridge benefit to the lifetime amount. The bridge has its own calculation:
0.675% × credited service × the lesser of best-five earnings or AYMPE
When the bridge applies, adding it back to the lifetime formula means the combined amount before age 65 can equal 2% × credited service × best-five earnings, before any applicable early-retirement reduction. The bridge then ends at age 65, leaving the lifetime portion.
The bridge is an OMERS benefit, not an advance payment of your Canada Pension Plan pension. Your CPP amount is calculated independently. OMERS bridge benefit rules The separate interaction between the two pensions is covered in OMERS and CPP, while the temporary payment itself is explained in the OMERS bridge benefit.
Bridge eligibility can differ for some service depending on whether it was earned before 2013 and whether the member has an NRA of 60 or 65. Rather than applying the basic formula blindly to an entire career, use the service recorded by OMERS when estimating the actual benefit.
Starting Your OMERS Pension Early Can Change the Calculation
An OMERS member does not necessarily receive the unreduced formula amount simply because they have reached the earliest retirement age. Most members have a normal retirement age (NRA) of 65, while eligible police officers, firefighters and paramedics can have an NRA of 60. An early pension can start up to 10 years before the applicable NRA.
An unreduced pension is available at normal retirement age. Depending on which OMERS benefit provisions apply to your service, you may also qualify earlier through 30 years of service, the 90 Factor for an NRA 65 member or the 85 Factor for an NRA 60 member. The factor adds your age to eligible plus credited service. The 2013 OMERS benefit changes mean those early-retirement tests do not apply identically to all service. OMERS early-retirement calculation rules
When a member who is eligible for the older early-retirement provisions does not meet an unreduced-pension test, the reduction is generally 5% per year multiplied by the least of the applicable age, factor or service shortfall. Your retirement date can therefore change the pension even when your best-five earnings and credited service stay the same.
Part-Time OMERS Pensions Need an Extra Calculation
For a non-full-time member, OMERS annualizes contributory earnings to determine best-five earnings. Credited service is then adjusted to reflect the portion of a full-time schedule actually worked. OMERS rules for non-full-time members
For example, someone working 50% of a full-time schedule does not simply have their lower part-time salary inserted into the standard formula alongside a full year of credited service. OMERS annualizes the earnings to a full-time equivalent and recognizes the corresponding proportion of credited service.
That treatment prevents the formula from understating the member’s earnings rate while still recognizing that fewer hours produced less pension service.
Your Contributions Do Not Directly Determine Your Pension Amount
OMERS members and employers contribute to fund the plan, but the pension formula does not add those contributions together and convert the resulting balance into retirement payments.
For 2026, an NRA 65 member contributes 9.0% of contributory earnings up to the $74,600 YMPE and 14.6% above it. An NRA 60 member contributes 9.2% up to the 2026 YMPE and 15.8% above it, with the employer making an equal contribution. Those percentages explain what comes off your pay, not the formula used to calculate the benefit.
The payroll calculation belongs in the separate explanation of OMERS contribution rates. For pension estimating, credited service and best-five earnings deserve more attention than trying to total every contribution you have made.
How to Get an Estimate of Your Own OMERS Pension
A hand calculation is useful for understanding the formula, but an actual retirement estimate can contain details that a simplified calculation misses. The Retirement Planner in myOMERS can project pension income and lets members compare different retirement dates. OMERS Retirement Planner and pension estimates
That becomes especially useful if your record contains pre-2013 and post-2012 service, part-time employment, transferred or purchased service, or a potential early-retirement reduction. Once payments eventually begin, the pension may also receive applicable inflation adjustments under rules that are separate from the initial calculation. Those later changes are covered in OMERS pension increases and indexing.
For planning purposes, we would use the formula to understand what drives the pension, then use your OMERS record for the actual estimate. That avoids treating a simplified calculation as though it captured every provision applying to your service.
Other Questions About OMERS Pension Calculations
Can service transferred from another pension plan increase your OMERS pension?
Transferred service can become credited service under OMERS when a qualifying transfer is completed. The value of the transfer is determined using factors that include credited service, your salary with the OMERS employer and applicable plan provisions, so a transfer from another plan does not necessarily purchase an identical number of years. OMERS pension transfer calculations
What happens if your employer later corrects your earnings?
A reported correction can change your best-five earnings when the affected contributory earnings fall within the highest 60 consecutive months used for the calculation. If the correction changes a benefit already paid, OMERS adjusts the pension record accordingly.
Does the OMERS pension formula include inflation increases?
Inflation protection is applied to qualifying pensions after the underlying pension has been determined rather than being one of the best-five earnings or credited-service inputs in the basic lifetime formula. For 2026, the OMERS inflation adjustment is 2.00%. 2026 OMERS inflation adjustment
Can an OMERS pension exceed the registered pension tax limit?
Benefits above the maximum permitted for a registered pension plan under the Income Tax Act can be paid through the OMERS Retirement Compensation Arrangement (RCA), a separate arrangement established for that purpose. OMERS Retirement Compensation Arrangement and plan texts
