2026 Federal Income Tax Estimator

Get a quick estimate of your 2026 federal income tax in about five minutes. This free calculator from SIM Financial Services works for Single, Married Filing Jointly, Married Filing Separately and Head of Household filers. Enter your wages and your self-employment, K-1, rental, investment, Social Security and retirement income. It applies the 2026 standard deduction and tax brackets plus the One Big Beautiful Bill Act senior deduction and charitable deduction for non-itemizers, and it figures self-employment tax, the QBI deduction and the Child Tax Credit.

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This tool is for planning only and is not tax advice. Nothing you enter is saved. For a complete picture, including your Arizona return, book a consult with our team.