IRS Form 1120S is the official tax return for S corporations. It’s used to report the company’s income, deductions, and credits to the IRS each year.
S corporations are popular with small business owners because they combine liability protection with pass-through taxation. That means the company avoids corporate income tax, and profits or losses “pass through” to the shareholders’ personal tax returns.
Filing Form 1120S correctly is critical. Mistakes can cause penalties, revoke your S corporation status, or create problems for shareholders.
Who Needs to Use Form 1120S?
This form is required for any business that has elected S corporation status with the IRS.
To qualify, a business must:
- Be a domestic corporation.
- Have no more than 100 shareholders.
- Issue only one class of stock.
- Have shareholders who are U.S. citizens or residents (some estates and trusts also qualify).
If you filed Form 2553 to elect S corporation status and the IRS approved it, then Form 1120S becomes your annual responsibility.
Failing to file puts your business at risk of losing S corporation benefits.
Where to Get Form 1120S
Getting Form 1120S is simple. Here are your options:
- IRS website: Download the form and instructions for free.
- By phone or mail: Request a copy directly from the IRS.
- Local IRS office: Pick up a printed version.
- Tax software: Most professional and consumer tax software includes it.
- Tax professional: An accountant can prepare and file it for you.
Always make sure you’re using the correct year’s form. The IRS updates instructions and details annually.
How to Use Form 1120S
When completing Form 1120S, you’ll report the corporation’s financial details for the year. Required information includes:
- Total income earned.
- Business expenses and deductions.
- Tax credits claimed.
- Shareholder details, such as names, Social Security numbers, and ownership percentages.
The form also requires you to attach Schedule K-1 for each shareholder. This ensures each owner gets a breakdown of their share of the business’s profits or losses.
Once completed, the return must be filed either electronically or by mailing it to the IRS.
Common Questions About Form 1120S
When Is Form 1120S Due?
The deadline is the 15th day of the third month after the end of your tax year. For most businesses using the calendar year, this means March 15.
What Happens If I Don’t File on Time?
The IRS charges penalties and interest for late filing. If you fail to file for three consecutive years, your S corporation election may be revoked.
How Often Do I File Form 1120S?
It’s an annual requirement, filed once per year.
Can I Get an Extension?
Yes. You can request an extension by filing Form 7004. This gives you an extra six months to file. Remember, it only extends the filing deadline, not the time to pay taxes owed.
Step-by-Step Checklist for Filing Form 1120S
- Gather Records: Collect financial statements, receipts, shareholder details, and prior-year tax returns.
- Download the Form: Get the latest Form 1120S and instructions from the IRS website.
- Complete the Income Section: Enter all income, sales, and revenue earned during the tax year.
- Add Deductions and Credits: Record eligible expenses like wages, rent, utilities, and business credits.
- Prepare Schedule K-1s: Complete one for each shareholder to show their share of profits or losses.
- Review for Accuracy: Double-check figures, Social Security numbers, and shareholder percentages.
- File with the IRS: Submit electronically or by mail before the deadline.
- Distribute Schedule K-1s: Send copies to shareholders so they can include the information on their personal tax returns.
Following these steps helps avoid errors that can lead to IRS inquiries.
Why Filing Form 1120S Matters
Form 1120S is more than just a tax filing requirement. It protects your business’s S corporation status, ensures transparency, and keeps shareholders compliant with their personal filings.
The form also provides the IRS with clear documentation of how business income is allocated. Any mistakes can affect both the company and shareholders, so accuracy is critical.
Consult a Professional with Questions
Filing Form 1120S can be intimidating, especially if you’re new to S corporations. Errors can trigger penalties or affect shareholder tax returns.
At Tax Law Advocates, we specialize in helping business owners with IRS compliance. Our experts can:
- Review your records and ensure Form 1120S is prepared accurately.
- File on time to prevent penalties.
- Advise you on tax strategies to reduce your overall liability.
- Assist with IRS disputes if issues arise.
If your IRS debt exceeds $10,000, or if you’re struggling to manage filings on your own, professional help is highly recommended. Call Tax Law Advocates at 855-612-7777 to schedule a consultation and protect your business’s future.
