I am thinking of switching to a job that is state supported, and they do not put into social security. Instead they have a 401A. I am trying to find out what this would do to my social security withdrawl amount when I retire. I am 57, so full benefits in 10 years from SS would be $2587 a month according to the SS website. But they are assuming I will keep making 85K a year until I retire. I don't see any calculators that show what my SS would be if I stopped contributing now and waited 10 years to start my benefits. Any insight to 401A vs continued contribution to SS are welcome. (Switching jobs vs not switching jobs)
If you are 57 and have been contributing to SS since you started work, you probably have 30+ years of contributions. So, continuing to work will just replace a lower earning year with a higher earning year (SS looks at you highest 30 earning years). Those earnings are weighted for inflation (so $40K 20 years ago would be worth much more than $40K today in the calculations). Also, SS has two bend points where earning additional money has a smaller percentage impact on your benefits. You are almost certainly above the point where the benefit switches from 90% of earnings to 32% and could possibly be above the 15% bend point.
https://www.ssa.gov/OACT/COLA/piaformula.html SS is really only a good deal until you contribute enough to reach the first bend point. Beyond that, it's are terrible investment. TLDR: if you have over 30 years of contributing to SS, stopping the contributions now will probably have minimal effect and the 401A is probably more beneficial.
I'm not very familiar with the windfall elimination provision. I don't think the 401A would impact this but a government pension likely would. You should check into that more because it could have a much more negative impact. If the WEP isn't a concern, I would guess you are much better off with additional money in a 401A than you would be with more years contributing to SS.