The Three Compounding Costs of Leaving Early
Leaving a pension job 5 years before your optimal date triggers three simultaneous costs: Cost 1: You lose 5 years of service credit (5 × multiplier × salary in annual benefit permanently foregone). Cost 2: Your final average salary is lower — if those 5 years would have been your highest-earning years, your entire benefit formula is reduced. Cost 3: If leaving triggers early retirement penalties, the reduced benefit applies to an already-smaller base amount.
Cost of leaving 5 years early vs. staying to key pension threshold
| Scenario | Stay 5 More Years | Leave Now | Lifetime Difference |
|---|---|---|---|
| Age 57 leave vs. 62 (no early reduction after 62) | $4,375/mo at 62 | $2,813/mo at 57 (25% reduction) | $472,500 over 25 yrs |
| Before/after Rule of 80 threshold | $3,900/mo (no reduction) | $2,730/mo (30% reduction) | $342,000 over 25 yrs |
| Miss 5-yr cliff vesting entirely | $2,500/mo eventual benefit | $0 (no vested benefit) | $750,000 over 25 yrs |
| Salary years 55–60 high earners | Final avg $92K → $4,600/mo | Final avg $80K → $4,000/mo | $216,000 over 30 yrs |
Retiring at 57 instead of 62 with a $75,000 salary and 30+ years of service can cost $472,500 over a 25-year retirement — the equivalent of 13+ years of retirement income permanently eliminated. This is a one-decision outcome worth modeling carefully.
What the Alternative Offers: The Comparison Test
Before leaving 5 years early, model both scenarios: (1) Stay 5 years and retire at the optimal date. (2) Leave now and either work elsewhere or retire early. Calculate the lifetime pension income difference. Then determine what your alternative scenario needs to provide to compensate: higher salary × 5 years × savings rate, invested at 7%, needs to equal the foregone pension lifetime value. For most mid-career government workers, this requires the alternative to pay $20,000–$40,000 more annually just to break even.
Required salary premium to offset early pension departure via private-sector investment
| Lifetime Pension Foregone | Required Annual Salary Premium | Years to Break Even at 10% Savings Rate |
|---|---|---|
| $150,000 | $10,000+/yr more | Never fully recoverable (too small a margin) |
| $300,000 | $20,000+/yr more | Possible if invested aggressively at 15%+ |
| $472,500 | $30,000+/yr more | Very difficult to fully recover |
| $750,000 (missed vesting) | $50,000+/yr more | Near impossible in 5–10 year window |
Calculate the Cost of Leaving 5 Years Early
Enter your current years, salary, and multiplier — then see your benefit now versus at your optimal retirement date.