Delaying your claim past your FRA to age 70 is mathematically equivalent to buying a single-premium immediate annuity from the federal government. The cost of this annuity is the cash flow you forego between age 67 and 70. However, unlike commercial annuities that carry insurance-company credit risk, high fees, and flat nominal payments, the Social Security version is backed by the U.S. Treasury, has zero overhead, and adjusts annually for inflation. Delaying is the cheapest, cleanest longevity insurance you can buy.
Claiming Strategy for Married Couples For married couples, the claiming strategy is even clearer:
Since men statistically have shorter life expectancies than women, it is almost always optimal for the husband (if he is the higher earner) to delay to 70 to protect his spouse’s late-life survivor income. If your full FRA benefit is $1,000/month, claiming early at 64 cuts your payout to $800, and if you die, your surviving spouse gets only $800. Delaying to 70 pushes the payout to $1,240, securing that elevated level for your widow for life.
For deep-dive break-even analyses, see Mike Piper’s Social Security Made Simple 114 and Laurence Kotlikoff’s Get What’s Yours - The Secrets to Maxing Out Your Social Security .115
To run your specific numbers, ignore commercial calculators and use these free, high-fidelity engines: