TSERS Retirement Formula: How to Calculate Your NC Pension

The TSERS benefit formula looks simple on paper — three numbers multiplied together. But each of those numbers has rules that catch members off guard when their estimate comes back lower or higher than expected.

The Formula

Your annual Maximum Allowance is:

Average Final Compensation × 1.82% × Years of Creditable Service

Divide by 12 for the monthly amount. That monthly figure is the Maximum Allowance — the highest payment TSERS will pay under the single-life option. Options 2, 3, 6-2, and 6-3 reduce it; Option 4 instead pays an increased amount before age 62 and a reduced amount after age 62.

Average Final Compensation (AFC)

AFC is the average of your annual earnable compensation during the highest-paid 48 consecutive calendar months of creditable service. For most members, that's the last four years before retirement — but it doesn't have to be. If you had a higher-paid position earlier in your career, those months count if they produce a higher average.

What counts toward AFC:

• Regular gross salary
• Longevity pay
• Administrative stipends paid from public funds

What doesn't count:

• Expense reimbursements
• Lump-sum annual leave payouts above statutory caps
• Non-statutory bonuses

If your salary increased significantly in your final years — say you moved from a teacher position to an administrative role — those higher-paid months pull up your AFC. But because the window is 48 consecutive months, a single year at a higher salary surrounded by lower-paid years won't move the needle as much as you might expect.

Years of Creditable Service

This includes:

• Membership service — the years you've worked and contributed 6% of salary to TSERS
• Purchased service — military, withdrawn, or out-of-state public service you bought back
• Converted sick leave — 20 days of unused sick leave equals one month of creditable service

Sick leave conversion is powerful but misunderstood. A member with 240 unused sick days adds 12 months (one full year) to their service total. That year flows straight into the formula. But sick leave cannot satisfy the five-year vesting requirement — it only adds to your total after you're already vested.

Running the Numbers

Take a member with:

• AFC of $52,000
• 28 years of membership service
• 180 days of unused sick leave (9 months converted)

Total creditable service: 28 years + 0.75 years = 28.75 years

Annual Maximum Allowance: $52,000 × 0.0182 × 28.75 = $27,209

Monthly Maximum Allowance: $27,209 ÷ 12 = $2,267

Now compare that to a member who purchased two years of withdrawn service, bringing total service to 30.75 years:

Annual: $52,000 × 0.0182 × 30.75 = $29,102

Monthly: $29,102 ÷ 12 = $2,425

That service purchase added about $158 per month for life — and it crossed the 30-year threshold for unreduced retirement at any age.

The 1.82% Accrual Factor

This is the statutory accrual factor under N.C. Gen. Stat. § 135-5. The factor used in this calculation is 1.82%.

Why Your ORBIT Estimate Might Differ

When you pull a Custom Benefit Estimate in ORBIT, the system projects your AFC forward based on current salary. If you're planning to retire mid-year and your actual final salary differs from the projection, the real number will adjust during the post-retirement audit — roughly 50% of new retirees see a recalculation in their first 12 months.

The NC TSERS Retirement Guide includes a benefit estimate worksheet that walks through the AFC calculation step by step, so you can verify ORBIT's projections against your own pay stubs before you commit to a retirement date.

See more North Carolina guides →