Who’s the higher earner?
Compare the estimates for you and your spouse, and pay special attention to the difference between your estimates. The higher earner is the spouse with the larger primary insurance amounts (PIA).
When you’re deciding who will collect first and who should wait, consider having the lower earner collect first and having the higher earner wait. Over time, the higher earner’s increases will be worth more than the lower earner’s increases.
And if one spouse’s estimates are more than twice as high as the other’s, it might make sense for both of you eventually to collect on the same spouse’s earnings record.
In that situation, the spouse with the lower benefits can claim first based on his or her own earnings record and apply for spousal benefits later when the spouse with the higher benefits starts to collect.
The longer the spouse with the higher benefit waits to start collecting, the higher benefits will be for both spouses. Delaying the higher earning spouse’s benefits could also eventually increase the other spouse’s survivors benefits.
Sources:
https://investor.vanguard.com/retirement/social-security/strategies-for-married-couples