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How to Calculate Provisional Income

By Motley Fool Staff – Updated Apr 29, 2025 at 11:22PM

Key Points

  • Social Security income is taxed based on provisional income calculations.
  • To find provisional income, add gross income, tax-free interest, and half your Social Security.
  • Tax rates for Social Security range from 0% to 85% depending on filing status and income level.

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