If one spouse has a significantly higher earnings history, the lower-earning spouse may be eligible for a “top-off” that increases their monthly benefit above what their own earnings record alone would pay.
The “Top-Off” Rule
Social Security always pays your own retirement benefit first. If your spousal benefit would be higher than your own, you receive a top-off to bridge the gap — these two amounts never stack, you simply receive whichever is higher.
- 50% cap: The spousal benefit is limited to 50% of the higher earner's Full Retirement Age benefit.
- Early filing reduces it: Claiming before Full Retirement Age (67) lowers this maximum percentage — this tool applies that same reduction automatically based on the claiming ages you selected.
- No delayed credit: Unlike your own benefit, the spousal amount does not keep growing if the lower earner waits past 67.
Example: if Spouse A's benefit is $4,000/month and Spouse B's own benefit is only $1,200/month, Spouse B can be topped off to as much as $2,000/month (50% of Spouse A's amount) once both have filed and Spouse B has reached age 67 — instead of their own $1,200.