Social Security Taxable Income Limit 2021. For every dollar between $12,000 and $24,000, an additional 50 cents becomes taxable. The social security wage base is the maximum amount of income that will be taxed for social security purposes.
Social security colas and wage base limits will never go lower, only remain the same or increase. If their income exceeds $44,000, up to 85 percent of the social security benefit is subject to income tax.