I retired in 2020 at 59. Worked for 41 yrs.
1.5 mil in retirement Accts. Married, no kids and low debt.
Question: if I’m no longer paying into SS will my benefit start to reduce each year until I reach 67?

Hi. No. Social Security retirement benefits are calculated based on an average of a person's highest 35 years of Social Security covered wage-indexed earnings. And, stopping work would neither lower your future benefit rate or raise it. It would just mean that you wouldn't be able to increase your rate by replacing earlier years of lower earnings with future years of higher earnings.

How much if any of a negative effect stopping work would have on your benefit rate depends on how much you earned in your previous 35 highest wage-indexed earnings years, and how much you would have been earning had you not stopped working. Regardless, though, if you wait until your full retirement age (FRA) to start drawing your benefits then no age reduction will be applied to your benefit rate and you'll be paid 100% of your primary insurance amount (PIA).

You may want to strongly consider using our software (https://maximizemysocialsecurity.com/purchase) to do your Social Security planning. The software allows you enter projected future year earnings, which would enable you to determine what difference, if any, returning to work would have on your future benefit rate.

Best, Jerry