Social Security decision: Should my 67-year-old sister wait until 70?

A reader asked whether her sister, who is turning 67 and reports a family history of long lifespans, should delay claiming Social Security benefits until age 70; the question was raised in a syndicated personal-finance column.

Under U.S. Social Security rules, full retirement age (FRA) depends on birth year (for those born in 1960 or later FRA is 67). Claiming after FRA but before age 70 earns delayed retirement credits that increase monthly benefits by roughly 2/3 of 1% per month — about 8% per year — up to age 70, at which point credits stop accruing. The Social Security Administration publishes the tables and calculators to model these increases.

Choosing when to claim is a trade-off between larger lifetime monthly checks (by delaying) and receiving more years of payments (by claiming earlier). For someone in good health with other income sources to cover the interim, waiting to 70 acts as longevity insurance and usually raises lifetime guaranteed income, especially for single claimants or the higher-earning spouse. Conversely, those with health issues or immediate cash needs may benefit from starting at FRA or earlier. Consumer guides recommend personalized scenario analysis rather than a one-size-fits-all rule.

The decision has limited direct market impact but aggregated claiming behavior influences household consumption and public-program projections. Analysts and planners point to survivor-benefit interactions, tax consequences and Medicare enrollment timing as additional elements that can tilt the optimal claiming age for couples versus singles. Public agencies and reputable advisory firms encourage use of SSA calculators and consultation with a CFP for tailored advice.

In practice, many advisers say that for a 67-year-old in reasonably good health who can bridge income for a few years, delaying to 70 can be financially advantageous; but if liquidity, health or caregiving needs press, starting at full retirement age often offers a prudent middle ground. The recommended next step is to run SSA’s calculators with the sister’s earnings record and model survivor scenarios to see which claiming age maximizes household lifetime income.