how is social security determined?

[louisag]

Once you are no longer earning social security points and are retired, why is there a limit on how much money you can earn without paying taxes? I think the limit is $50k. 

[Opus 17]

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@louisag wrote:

Once you are no longer earning social security points and are retired, why is there a limit on how much money you can earn without paying taxes? I think the limit is $50k. 

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Because the government says so (various Congresses over the decades).

If your only income is social security, it is not taxable.  If you have other taxable income from any source (like a pension, investments, IRA withdrawals, gambling prizes, etc.) then you pay tax on that income and you may also pay tax on part of your social security benefits.  Read more here.

https://www.irs.gov/newsroom/dont-forget-social-security-benefits-may-be-taxable

The practical dollar limit depends on your filing status and the amount of your benefit and your other income.  

[louisag]

Thank you. I didn't know social security income was taxable based on additional income.