Lump sum vs annuity — the math and the meta
On pure math, compute the present value of the annuity stream over your expected lifetime. If the offered lump sum is bigger, take it. If smaller, the annuity wins.
But the meta matters: an annuity is longevity insurance. If you live to 95, the annuity keeps paying. If you live to 70, the lump sum gives your heirs something. Match the choice to your situation, not just the math.
Survivor options — insurance, not loss
A 50% joint and survivor option reduces your monthly by 10–15%. A 100% option reduces it by 15–25%. That reduction is the premium you pay for lifetime income to your spouse if you die first.
If your spouse has their own pension or significant savings, single life can be the right choice. If they're depending on this income, the reduction is buying critical protection.
COLA is the silent compounder
A 3% annual COLA over 25 years more than doubles your pension. A 2% COLA increases it by 64%. A zero-COLA pension loses half its purchasing power over a long retirement.
If your plan has a COLA, it is one of the most valuable parts. Confirm whether it is automatic, ad-hoc, or capped, and budget accordingly.
Common pension mistakes
- Retiring just before a years-of-service milestone (28.9 instead of 29.0).
- Choosing single life without consulting a dependent spouse.
- Taking the lump sum and putting it in cash instead of investing it.
- Ignoring the WEP/GPO impact on Social Security if relevant.
- Forgetting that pension income is fully taxable as ordinary income.