IRS Tax Calculators & Resources

    Use our modern, easy-to-use tools to estimate your federal income taxes, self-employment tax, potential refunds, and prepare your documents.

    2026 Tax Deadlines

    Key dates you need to remember for the tax year

    Q4 2025 Estimated Tax

    January 15, 2026

    Due date for fourth quarter estimated tax payments for the previous year.

    W-2s and 1099s

    January 31, 2026

    Deadline to distribute W-2s to employees and 1099s to independent contractors.

    Partnerships & S-Corps

    March 16, 2026

    Form 1065 and 1120-S returns due, or deadline to file for an extension.

    Individual & C-Corps

    April 15, 2026

    Tax Day! Form 1040 and 1120 returns due. Q1 2026 estimated tax also due.

    Q2 2026 Estimated Tax

    June 15, 2026

    Due date for second quarter estimated tax payments.

    Q3 Estimated Tax & Extensions

    September 15, 2026

    Q3 estimated tax due. Extended deadline for Partnerships and S-Corps.

    Extended Deadline

    October 15, 2026

    Final deadline for Individual and C-Corp returns on extension.

    Tax Preparation Checklist

    Keep track of the documents you need to file

    2026 Federal Income Tax

    Estimate your federal tax liability

    Self-Employment Tax

    Calculate your self-employment tax obligations

    2026 Tax Refund Estimator

    Find out if you'll get a refund or owe taxes

    Business Entity Tax Comparator

    Compare estimated taxes across different business structures based on a simplified model.