TaxReliefCalculator.com

See how current penalties and interest work

A current-rate illustration, not a reconstruction of your IRS balance.

What this page does

This worksheet applies today's verified rates and rules from a return's due date through your chosen end date. It does not look up historical interest rates or subtract charges previously assessed. If you already have a notice showing assessed penalties, use the notice and your IRS account to review those actual charges. A difference from this illustration does not establish that the notice is wrong. The result is a subtotal of supported charges: late filing, late payment, interest on unpaid tax and interest on the late-filing penalty, when their required facts are known. It excludes unpaid tax and late-payment-penalty interest. Missing assessment dates are shown as unavailable, never supplied as a hypothetical date.

Your worksheet

Your figures stay in this page's memory. They are not sent to us or included in a shared link. Privacy.

Tax and dates

Enter the tax that was unpaid by the payment due date. Do not enter a total notice balance that includes penalties or interest. Different payment or assessment events may put the account outside this illustration.

Use the statutory date before any weekend or legal-holiday shift. This version does not calculate that calendar.

Supply the verified next-business-day deadline if it differs; otherwise enter the same statutory date. Leave blank if unknown: affected components remain unavailable.

Select yes only if an extension applied. It generally changes when the late-filing penalty starts, not when tax must be paid. Special relief and payment-extension rules require separate review.

The verified extension date before any weekend or legal-holiday adjustment. Required for the extension filing branch.

Enter the verified timely deadline, even when it equals the statutory extension date. Unknown blocks the affected branch.

Exactly 90% meets this test. Applies only to the narrow valid-extension presumption.

For this scenario, filing and full payment must share the illustration end date. Unknown is not assumed yes.

Enter the date the return was filed. If it has not been filed, select “Not filed.”

Enter the date the return was filed. If it has not been filed, select “Not filed.”

Select this when the unpaid tax remains outstanding through the chosen end date.

Enter the date the unpaid tax in this illustration was fully paid. Partial payments need an allocation history this version does not reconstruct.

Choose the last day to illustrate. This is a scenario date, not a prediction of when the IRS will act.

Other return types need different rules.

Yes means: ordinary individual return, unpaid tax unchanged through the illustration end date, no levy-rate increase, no unreported-tax assessment, no special payment deadline and no relief already deducted. If these facts are unknown, affected components remain blocked.

A pending request or an agreement for another tax does not establish the reduced rate.

Include a verified valid filing extension.

Use the effective date in the IRS record.

If it ended, supply the termination date.

Leave blank only when confirmed still active, or when no agreement applies.

Data version 2026.10. Official information last checked 2026-10-06.

Caps and relief explainer

Late-filing and late-payment penalties have separate limits. When both apply in one month, the late-filing charge is reduced by the late-payment charge. The ordinary combined monthly charge is five percent. Late filing can reach its limit while late payment continues toward its own limit. Returns more than 60 days late can also face a minimum late-filing charge, limited by unpaid tax. Interest is separate and compounds daily. First Time Abate can remove certain penalties after IRS review. Automatic Exemption from Penalty now covers some newer original returns with a timely compliance history. Neither this worksheet nor the checklist grants relief. Check your notice, tax year and IRS guidance before requesting a correction or assuming a penalty has already been removed.

Important limits

The more-than-60-day minimum can exceed the ordinary late-filing percentage cap. It can also make the usual combined-rate shorthand inapplicable. Do not cap the minimum back down to 25 percent or describe 47.5 percent as a universal lifetime ceiling. Current rules use the smaller of $525 and unpaid tax for the applicable 2026 original due-date period; this current-rule illustration holds today’s rule constant. IRS late-filing penalty

An approved agreement must cover the particular tax. Individual status, timely filing, agreement dates and termination status matter. A final levy notice can require a higher late-payment rate, and interest on penalties has separate start-date rules. If those facts are needed and unknown, the affected component stays unavailable and is excluded explicitly from the supported charges subtotal. IRS late-payment penalty · IRS interest

Relief checklist

  • Identify the tax year, return type and exact penalty on the notice.
  • Review the prior three years of the same return type; a joint return may require both spouses' histories.
  • Check whether required returns were timely filed or there was no filing obligation, and how any earlier penalties were resolved.
  • Check whether the original return falls within the current AEP program and its filing window. For applicable newer original returns, look for the IRS's AEP letter.
  • For older or transition returns not considered for AEP, ask the IRS about request-based FTA.
  • If automatic relief appears missing, contact the IRS using the notice. Reasonable-cause relief is a separate fact-specific question.
  • Do not reduce this worksheet's result for relief that the IRS has not confirmed.

See administrative relief and the July 2026 AEP explanation.

Low-income note

Income alone does not decide whether these penalties apply or whether administrative relief is available. If you need help with a collection dispute and cannot afford representation, check Low Income Taxpayer Clinics.

DIY and when to get help

You can identify a penalty on your notice and ask the IRS to explain it or review relief. Seek individualized help for multiple assessments, partial payments, disaster relief, a disputed filing date or a collection deadline. Those facts can change the calculation.

DIY links

Questions you may have

Why does the result differ from my notice?

The IRS uses actual account events and the applicable rates for each period. This tool applies current rates across your chosen span and does not reconstruct previous assessments, credits or payments.

Should I enter my total IRS balance?

No. Enter unpaid tax only. A total that already includes penalties and interest would give those charges the wrong starting treatment. The IRS penalty pages explain the separate categories.

Does a filing extension postpone payment?

Generally, it postpones filing, not the tax payment deadline. Special postponements and payment extensions require their own rules and are outside an ordinary extension flag. IRS failure-to-pay guidance

Does a payment plan always cut the late-payment rate?

No. The reduced rate depends on an installment agreement being in effect and the applicable timely-filing conditions. Unknown answers must not be treated as yes. IRS failure-to-pay guidance

Can the tool tell me whether a penalty will be removed?

No. It provides a checklist and official links. The IRS now uses AEP for certain newer original returns, while FTA remains relevant for older and transition cases. Reasonable cause may also need individual review. IRS administrative relief