Free 2026 IRS Penalty Payment Plan Calculator

1. Enter the federal balance due.
2. Enter whole or partial months late for filing and payment.
3. Adjust the annual interest rate after checking current IRS quarterly interest-rate guidance.

Better inputs create better estimates. The calculator is designed to accept common formatting such as commas, dollar signs, decimals, and blank optional fields without breaking the result.

Apply simplified monthly failure-to-file and failure-to-pay penalty assumptions to the unpaid balance, add simple interest for the period entered, then divide the estimated total by the selected payment-plan months.

A $5,000 balance filed two months late and paid six months late can be estimated with separate filing, payment, and interest components before selecting a repayment period.

Year scope: Use the year selector or year note on the calculator itself when comparing thresholds, rates, deductions, or credit limits.

This page is most useful when the user needs a planning estimate before using official forms, payroll systems, filing software, or professional guidance.

• Freelancers / 1099 workers
• Small business owners
• Employees

Estimate only. IRS penalties can be affected by reasonable cause, installment agreements, minimum penalties, rate changes, notices, and account-specific facts.

The estimate may differ from a filed return or payroll result when exact worksheets, timing, local taxes, special credits, phaseouts, account-specific IRS notices, or state rules apply.

This calculator is maintained against official IRS, SSA, state-agency, or other authoritative references where applicable. Review the sources page and editorial methodology page to verify update practices.

• https://www.irs.gov/payments/failure-to-file-penalty
• https://www.irs.gov/payments/failure-to-pay-penalty
• https://www.irs.gov/payments/quarterly-interest-rates
• https://www.irs.gov/payments/payment-plans-installment-agreements

Estimate a simplified federal tax penalty and payment-plan scenario using tax balance, late months, annual interest rate, and repayment period.

Estimate only. IRS penalties can be affected by reasonable cause, installment agreements, minimum penalties, rate changes, notices, and account-specific facts.