The useful question is not simply which spouse should claim first. It is how each claiming combination changes lifetime household cash flow, portfolio withdrawals, taxes, and survivor income.
Know the three age markers
Social Security retirement benefits may generally begin at 62. Claiming before full retirement age reduces the monthly benefit. Delaying after full retirement age can increase the benefit through delayed retirement credits, and the increase stops at 70.
Each spouse should obtain an individual estimate from Social Security rather than relying on a percentage of current salary or a calculator default.
Model the bridge before choosing the date
Delaying a benefit means another source must fund the intervening years. That source may be earnings, cash, taxable investments, retirement-account withdrawals, or the other spouse's income.
A larger future benefit is not free if the bridge requires uncomfortable investment sales or forces the household to abandon a valuable tax strategy. Put the bridge years directly into the comparison.
Give survivor income its own column
After the first spouse dies, the household usually loses one Social Security payment while many expenses remain. The higher earner's claiming decision can therefore influence the income available to the surviving spouse.
Compare the plan after either spouse dies first. A strategy that looks fine for a couple may expose the survivor to a much larger income gap.
Compare at least three household timelines
Start with a small set of understandable alternatives rather than dozens of combinations. For example: both claim early; each claims near full retirement age; or the higher earner delays while the lower earner claims earlier.
For each timeline, record monthly benefits, investment withdrawals during the bridge, taxes to investigate, the survivor benefit, and the age at which cumulative payments cross over. Then judge the tradeoff in the context of health, longevity, work, and risk tolerance.
Recheck the decision before filing
Benefits, earnings histories, marital circumstances, and laws can change. Revisit the comparison annually and again before either spouse applies.
A calculator can organize the choices, but individual filing advice may require Social Security, tax, or financial-planning expertise.
Primary sources
Rules and limits change. Use these official sources to verify details for the year in which you act.
See what your current numbers imply.
Start with a transparent estimate, then use this guide to decide which assumption deserves a deeper look.
Use the retirement calculator →