Disclaimer

TaxPenalty.app provides estimates only and is not tax, legal, or accounting advice. Results are approximations based on published IRS rules and rates and may not match an IRS assessment. Consult a qualified tax professional before making filing, payment, or abatement decisions. We are not affiliated with the Internal Revenue Service.

No professional relationship

Using TaxPenalty.app does not create an attorney-client, CPA-client, or enrolled agent relationship. We do not file returns, represent you before the IRS, or provide personalized tax advice.

Estimates can differ from IRS assessments

Penalty and interest computations depend on facts, notice dates, abatements, partial payments, and rate updates. Always verify against IRS notices and professional guidance.