2024 Social Security Tax Limit Irs. In 2024, the maximum amount of earnings on which you must pay social security tax is $168,600. The federal government sets a limit on how much of your income is subject to the social security tax.

The earnings used to calculate benefits in retirement are capped at the same level. For the tax year 2024, the top tax rate is 37% for individual single taxpayers with incomes greater than $609,350 ($731,200 for married couples filing jointly).