When Are Business Taxes Due 2025? Important Dates You Must Know

As 2025 approaches, small business owners, freelancers, and corporations alike must ask the critical question: when are business taxes due 2025? Staying ahead of tax deadlines is essential to avoid penalties, late fees, and unnecessary stress. This article breaks down everything you need to know about business tax deadlines in 2025, whether you’re a sole proprietor, LLC, partnership, or corporation.

Key Tax Deadlines in 2025

So, when are business taxes due 2025 for various entity types? Here’s a simple breakdown:

1. Sole Proprietorships and Single-Member LLCs

If you’re a sole proprietor or operate a single-member LLC, your business income is reported on Form 1040, Schedule C. This means your business tax filing deadline is April 15, 2025.

2. Partnerships and Multi-Member LLCs

If your business is a partnership or multi-member LLC, you must file Form 1065. The due date for these is March 17, 2025, since March 15 falls on a Saturday in 2025.

3. S Corporations

S Corporations also use Form 1120-S, and like partnerships, the deadline is March 17, 2025.

4. C Corporations

C Corporations file Form 1120, and the due date is April 15, 2025, for calendar-year corporations.

So, again—when are business taxes due 2025? It depends on your business structure, but knowing the above deadlines is crucial for compliance.

What About Estimated Quarterly Taxes?

If your business pays estimated taxes, you’ll also need to know the quarterly due dates for 2025:

• Q1: April 15, 2025
• Q2: June 16, 2025
• Q3: September 15, 2025
• Q4: January 15, 2026

Missing these can lead to IRS penalties. So if you’re wondering when are business taxes due 2025, don’t forget your quarterly obligations.

Extension Deadlines

If you can’t meet the initial deadlines, filing for an extension gives you extra time. Here’s what to know:

• Partnerships & S Corps: Extended deadline is September 15, 2025
• C Corporations & Sole Proprietors: Extended deadline is October 15, 2025

Remember, filing an extension does NOT mean deferring payment. You still need to pay estimated taxes by the original due date. The IRS charges penalties and interest on unpaid amounts.

Filing Tips for Business Owners

To meet the when are business taxes due 2025 deadlines, follow these best practices:

• Organize your records early – Don’t wait until March or April.
• Work with a tax professional – Especially if your situation is complex.
• Use accounting software – This reduces manual errors and speeds up preparation.
• File electronically – Faster and more accurate than paper filing.

Why Meeting Tax Deadlines Matters

Failing to meet tax deadlines can result in:

• Late filing penalties
• Late payment penalties
• Interest charges
• Potential audits

So asking when are business taxes due 2025 isn’t just about planning — it’s about saving your business money and staying compliant.

FAQs About When Are Business Taxes Due 2025

1. When are business taxes due 2025 for LLCs?

For single-member LLCs, it’s April 15, 2025. For multi-member LLCs, it’s March 17, 2025.

2. What if I miss the 2025 tax deadline?

You may face late filing and payment penalties. File as soon as possible and pay what you can to minimize penalties.

3. When are business taxes due 2025 for corporations?

S Corporations must file by March 17, 2025. C Corporations have until April 15, 2025.

4. Can I file for an extension?

Yes, but you must submit the extension request by the original due date. Payment is still required on time.

5. When are business taxes due 2025 if I’m self-employed?

You’ll file with your personal return, due April 15, 2025. You may also owe estimated quarterly taxes.

6. How do estimated taxes work in 2025?

They’re due on a quarterly basis: April 15, June 16, September 15 (2025), and January 15 (2026).

7. When are business taxes due 2025 if I use a fiscal year?

Fiscal-year businesses file by the 15th day of the fourth month after the end of their fiscal year.

8. What forms are needed for business taxes in 2025?

Common forms include 1040 Schedule C, 1065, 1120-S, and 1120, depending on your business type.

9. Do I still need to file if my business made no income in 2025?

Yes. You may still need to file a return even if you had no earnings to report.

10. Are business tax deadlines the same every year?

Not always. Holidays and weekends can shift the date. That’s why it’s important to confirm when are business taxes due 2025 specifically for this year.

Final Thoughts

So, when are business taxes due 2025? The short answer: March 17 or April 15 for most businesses, depending on your entity type. Planning early and staying organized ensures you won’t miss the deadline. Don’t let procrastination cost you — know your dates and file on time.