Form 1120-S (2025): U.S. Income Tax Return for an S Corporation
S corporations file Form 1120-S to report income, deductions and credits that pass through to shareholders, who receive a Schedule K-1.
Form Details
- Tax Year
- 2025
- Revision
- 2025
- Pages
- 5
- File Size
- 267 KB (PDF)
- Due Date
- March 16, 2026 — extended: September 15, 2026
- Category
- Business — S Corporations
Due dates are for calendar-year filers, as published by the IRS for the 2025 tax year; a weekend or legal holiday moves a due date to the next business day.
Who Uses Form 1120-S
S corporations and their shareholders.
Schedules for Form 1120-S
- Schedule B-1 (Form 1120-S) — Information on Certain Shareholders of an S Corporation
- Schedule D (Form 1120-S) — Capital Gains and Losses and Built-In Gains
- Schedule K-1 (Form 1120-S) — Shareholder's Share of Income, Deductions, Credits, etc.
- Schedule K-2 (Form 1120-S) — Shareholders' Pro Rata Share Items — International
- Schedule K-3 (Form 1120-S) — Shareholder's Share of Income, Deductions, Credits, etc. — International
- Schedule M-3 (Form 1120-S) — Net Income (Loss) Reconciliation for S Corporations With Total Assets of $10 Million or More
Related Forms
- Extension:Form 7004 — Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns
- E-File Authorization:Form 8879-S — IRS e-file Signature Authorization for Form 1120-S
Zentavos can prepare and e-file this for you
A tax professional prepares and reviews your federal return — with Form 1120-S when your return needs it — and files it electronically with the IRS.
See Tax PrepFrequently Asked Questions
Download the blank Form 1120-S PDF from this page. It is the official IRS file, delivered from IRS.gov — Zentavos does not change it. You can also find it on the IRS's page for Form 1120-S.
Yes. This is the 2025 revision of Form 1120-S, the version for tax year 2025.
Yes. Zentavos prepares and e-files federal tax returns for individuals and businesses, including the forms and schedules each return needs. If Form 1120-S is part of your filing, our team can prepare it with your return — see Tax Prep to get started.
Source: IRS.gov — Form 1120-S