Single filers have one Social Security decision: when to claim. Couples have several decisions, all interacting with each other, and the difference between a good strategy and a default one is often hundreds of thousands of dollars in lifetime benefits.
The mechanics, briefly
Your Primary Insurance Amount (PIA) is what you'd receive if you claimed at full retirement age (currently 67 for most people). Claim earlier — as early as 62 — and your benefit is reduced. Wait until 70 and your benefit grows by 8% per year in delayed retirement credits. The difference between claiming at 62 and 70 can exceed 76% in monthly benefit.
What changes for couples
Two things make couples' decisions more interesting than singles':
- Spousal benefits. A lower-earning spouse can claim up to 50% of the higher earner's PIA — but only after the higher earner has filed.
- Survivor benefits. When one spouse dies, the survivor steps up to the larger of the two benefits. That means the higher earner's claiming decision affects both spouses' lifetime income.
The pattern that usually wins
For most dual-earner couples with at least one spouse expected to live into their 80s, the optimal strategy is:
- Lower earner claims earlier (often at full retirement age or even 62) for cash flow
- Higher earner waits until 70 to maximize their benefit — and, by extension, the survivor benefit
This pattern exploits two facts: the higher earner's delayed credits compound on a larger base, and the survivor benefit means those credits keep paying after the higher earner is gone.
When the pattern doesn't apply
Strategies break down when:
- Both spouses have meaningful health issues that cap longevity
- The household needs Social Security cash flow earlier than 70
- There's a large age gap (the older, higher-earning spouse may need to claim earlier than 70)
- One spouse never earned enough to qualify on their own record (claiming strategies for spousal-only benefits differ)
What to do
- Pull both Social Security earnings statements at ssa.gov
- Get realistic longevity estimates for each spouse from a current physician
- Model at least three claiming scenarios (both at 62, both at 67, lower-at-FRA / higher-at-70) with your advisor
- Stress-test against the survivor's solo years — that's where the math is most sensitive
Social Security is one of the few financial decisions where waiting is a guaranteed inflation-adjusted return. But "wait" is only the right answer for the right person, in the right household, with the right cash flow alternatives.
Talk to an IronBridge planner about modeling your household's claiming strategy with both spouses' real numbers.