Tools

Late 1120-S penalty estimator

Estimates the federal late-filing penalty per shareholder per month, using the approved rule for the selected year.

Tax year

Months late

Number of shareholders

Tax owed (0 if none)

Estimated penalty

$1530.00

Breakdown

Verified rule1120-S 2026

Estimate only. Interest and other penalties are not included, and this is not advice.

This is an estimate, not advice or a filed position.

Only years whose amount is approved with an official source are offered. For other years the tool does not invent a number.