Tax Deadlines for Small Businesses in 2025: What You Can’t Afford to Miss

Apr 4

Introduction

Missing tax deadlines can cost your business penalties, interest, and unnecessary stress. Whether you're a sole proprietor, LLC, or S-Corp, knowing what’s due — and when — is essential to staying compliant and financially healthy in 2025.

Why Staying on Top of Deadlines Matters

Late filings can lead to fines, cash flow issues, and even IRS audits. Staying organized with a tax calendar not only protects your business but also helps you avoid last-minute scrambles and keeps your books clean year-round.

Key Federal Tax Dates for 2025

January 15: Final estimated tax payment for Q4 2024
March 17: S-Corp and partnership tax returns due (Form 1120-S & 1065)
April 15: Personal and sole proprietor tax returns due (Form 1040 and Schedule C)
October 15: Extended filing deadline for personal returns (if filed Form 4868)

Quarterly Estimated Tax Deadlines

If you expect to owe $1,000 or more in tax, you’ll likely need to pay quarterly estimated taxes:

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

W-2 and 1099 Filing Deadlines

If you hire employees or contractors, you must file:

W-2s: Deliver to employees and file with SSA by January 31, 2025
1099-NECs: Deliver to contractors and file with IRS by January 31, 2025

State-Specific Deadlines to Watch

Many states follow the IRS schedule, but some have different corporate deadlines, estimated tax due dates, and filing requirements. Check with your local state department of revenue.

What Happens If You Miss a Deadline?

Failure-to-file penalty: Up to 5% per month of the unpaid tax
Failure-to-pay penalty: 0.5% per month of balance due
Interest: Accrues daily on unpaid taxes

Tools & Tips to Stay Organized

Use a digital tax calendar (Google Calendar, Notion)
Set recurring reminders
Automate savings for quarterly payments

Working with a Tax Pro vs. DIY

While DIY works for some, a tax professional helps you stay ahead of deadlines, avoid penalties, and focus on what matters — running your business.

How Wood Tax Advisory Keeps You on Track

Personalized tax calendars
Quarterly check-ins and deadline reminders
Hands-off filing and reporting

Conclusion & Call to Action

2025 is a big year for small business growth — don’t let a missed tax deadline hold you back. Contact Wood Tax Advisory and stay one step ahead all year long.

Matthew Wood