IRS Interest & Penalty Calculator
Calculate IRS failure-to-pay, failure-to-file penalties, and interest on late tax payments.
Tax Details
Penalty Calculation
Tax Amount Owed$$10000.00
Days Late90 days
Months Late3 months
IRS Interest Rate (2026)8.0%
Interest Accrued$$197.26
Failure-to-Pay (0.5%/month)$$150.00
Total Penalties$$150.00
Total Amount Due
Original Tax
$$10000.00
Interest
$$197.26
Penalties
$$150.00
Total Due
$$10347.26
Penalty Rates Summary
Interest
8.0% annually
Adjusted quarterly
Compounded daily
Failure-to-Pay
0.5%/month
Max 25%
Applies from deadline
Failure-to-File
5%/month
Max 25%
Much larger - file extension!
Penalty Abatement Options
Reasonable cause
Documented circumstances beyond control
First-time abatement
Clean compliance history (3 years)
Statutory exception
Disaster area, military service, casualty
Request abatement with IRS. First-time abatement often approved for clean 3-year history. Reasonable cause: illness, disaster, death in family. Document circumstances. Call IRS or write letter explaining situation.
Key Advice
Even if can't pay, FILE tax return or extension by deadline to avoid larger FTF penalty. Pay as much as possible to reduce penalties. Payment plans available - apply via Form 9465 or online. Interest continues even with payment plan. File Form 2210 for estimated tax penalty calculation. Penalty relief for reasonable cause - document circumstances.
Payment Options
Full payment: Stops interest/penalty growth. Short-term extension: Up to 180 days, $89 fee. Installment agreement: Monthly payments, $31-225 setup fee. Offer in Compromise: Settle for less if can't pay full. Currently not collectible: Temporary suspension. Apply online at IRS.gov or call.