TaxArith calculator catalog
Choose a 2026 federal tax calculator
Start with the question you need to answer. Each calculator has a defined federal scope, explains its assumptions, and shows the limits of its planning estimate.
Jump to a category
Complete directory
All federal tax calculators
Category 1
Income tax and refunds
Understand federal income tax, marginal brackets, and whether payments may result in a refund or amount owed.
- Tax Bracket CalculatorSee how your taxable income is distributed across the 2026 federal tax brackets.
- Federal Income Tax CalculatorEstimate your 2026 federal income tax from ordinary income, qualified dividends, long-term capital gains, deductions, and credits.
- Tax Refund CalculatorEstimate your 2026 federal tax refund or amount owed from income, deductions, credits, withholding, and tax payments.
Category 2
Self-employment and payments
Estimate self-employment tax and plan federal estimated payments throughout the year.
Category 3
Investments and capital gains
Model the federal tax effects of investment gains, crypto dispositions, losses, and harvesting decisions.
- Capital Gains Tax CalculatorEstimate the 2026 federal tax impact of capital gains, losses, carryovers, qualified-dividend stacking, and optional NIIT.
- Crypto Tax CalculatorEstimate the 2026 federal income-tax impact of taxable crypto dispositions, capital netting, loss carryovers, and long-term rate stacking.
- Tax-Loss Harvesting CalculatorCompare the 2026 federal tax effect of selected capital-loss sales after transaction costs, wash-sale adjustments, netting, deductions, and carryforward.
Category 4
Deductions and credits
Compare deduction approaches and estimate selected federal tax credits for dependents.
Which tool fits your question?
Broad tax estimate
Begin with the Federal Income Tax Calculator. Choose the Tax Refund Calculator when withholding and payments are central to the question.
Focused decision
Use a topic-specific tool for quarterly payments, self-employment tax, investment transactions, deductions, or child-related credits.