Getting started quickly
We recommend that you always run the latest stable version, currently 5.42.0. If you're running a version older than 5.8.3, you may find that the latest version of CPAN modules will not work.
Calculating your income tax involves a multi-step process that transforms your total earnings into a final amount owed or a refund. For the 2026 tax year, recent legislation like the One, Big, Beautiful Bill (OBBB) has permanently set tax rates while adjusting brackets and deductions for inflation. 🏗️ Step 1: Calculate Your Gross Income
: Contributions made with after-tax dollars. calculate your income tax
Start by adding up every dollar you earned throughout the year. This is your "raw" income before any reductions. Calculating your income tax involves a multi-step process
You can reduce your gross income by taking "above-the-line" deductions. These are available even if you don't itemize. Start by adding up every dollar you earned
: Wages, salaries, tips, and bonuses from your job.
: Unreimbursed costs exceeding 7.5% of your AGI. Charitable Gifts : Donations to qualified non-profits. Step 4: Calculate Your Tax Liability 2026 Tax Brackets and Federal Income Tax Rates