Estimate IRS late-filing and late-payment penalties plus interest on a balance due under current federal tax law.
A simplified IRS-penalty estimate under current federal tax law: failure-to-file accrues about 5% of the balance per month (capped at 25%), late payment about 0.5% per month (capped at 25%), plus interest on the overdue balance. Rates and rules change, so confirm with the IRS before relying on the number.
Penalty
Penalty = balance × (5%/mo filing, cap 25%) + balance × (0.5%/mo payment, cap 25%) + interest
Approximate estimate — not official IRS figures.
Yes — first-time penalty abatement or reasonable-cause abatement can be requested with the IRS.
Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.