As 2026 begins, it’s time to mark your calendar with important federal and state tax deadlines. Knowing these dates in advance helps you avoid penalties, reduce stress, and stay compliant with IRS and state tax laws.
For small business owners and self-employed individuals, timely filing is essential to managing cash flow, maintaining compliance, and taking advantage of strategic tax planning opportunities. With accurate and timely bookkeeping, you can plan ahead, lower your tax bill, and keep your business financially healthy.
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When Is Tax Day in 2026?
For the 2025 tax year (filed in 2026), the federal Tax Day falls on Wednesday, April 15, 2026. This is the deadline to file your federal income tax return and pay any taxes owed.
If you can’t file by April 15, you can request a six-month extension using IRS Form 4868. The extension allows you to file by October 15, 2026, but it does not extend your payment deadline. You must still pay any taxes owed by April 15 to avoid penalties and interest.
Federal Tax Deadlines for 2026
Here are the key federal filing deadlines for the 2025 tax year:
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C Corporations: April 15, 2026 (Form 1120)
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S Corporations: March 17, 2026 (Form 1120-S)
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Partnerships: March 17, 2026 (Form 1065)
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Sole Proprietors & Single-Member LLCs: April 15, 2026 (Form 1040 + Schedule C)
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Tax Extension Deadline: October 15, 2026
Quarterly Estimated Tax Payment Deadlines
If you are self-employed or run a small business, you must make estimated tax payments throughout the year. These cover your income tax and self-employment tax. The estimated tax payment due dates for 2026 are:
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1st Quarter: April 15, 2026
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2nd Quarter: June 15, 2026
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3rd Quarter: September 15, 2026
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4th Quarter: January 15, 2027
Making quarterly payments on time helps avoid penalties and keeps your cash flow steady.
State Tax Deadlines for VA, DC, and MD
State deadlines may differ slightly from federal ones. Here’s what to know if your business operates in Virginia, Washington D.C., or Maryland:
Tax Deadlines for Virginia (VA)
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Individual and business income tax deadline: May 1, 2026
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Extended filing deadline (if requested): November 1, 2026
Virginia gives taxpayers an automatic 6-month filing extension. However, any Virginia taxes owed are still due by May 1 to avoid penalties.
Tax Deadlines for Washington, D.C. (DC)
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Individual and business income tax deadline: April 15, 2026
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Extension deadline: October 15, 2026
D.C. follows the federal filing schedule, but businesses with franchise or unincorporated tax obligations should confirm filing dates with the D.C. Office of Tax and Revenue.
Tax Deadlines Maryland (MD)
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Individual and business income tax deadline for Maryland: April 15, 2026
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Extended filing deadline: October 15, 2026
Maryland automatically follows the federal deadline unless adjusted for holidays or weekends.
Business Structure and Filing Deadlines
Your filing deadline depends on your business type.
Sole Proprietorships & Single-Member LLCs: File with your personal return by April 15. Use Form 1040 with Schedule C to report business income and expenses.
Partnerships & Multi-Member LLCs: File Form 1065 by March 17. Each partner receives a Schedule K-1 showing their share of the business income or loss.
S Corporations: File Form 1120-S by March 17. Shareholders also receive a Schedule K-1 for their personal tax filings.
C Corporations: File Form 1120 by April 15. If needed, request an extension using Form 7004 to move your deadline to October 15.
When You Can Start Filing Taxes
The IRS typically begins accepting returns in late January 2026. Filing early helps you receive refunds faster, fix issues before deadlines, and protect against tax fraud. Early filing also allows your accountant to identify last-minute tax-saving opportunities.
What If You Can’t File or Pay on Time?
If you miss the deadline to file, the failure-to-file penalty is usually 5% of your unpaid taxes for each month late, up to 25%. The failure-to-pay penalty is 0.5% per month, up to 25% of the amount owed.
To avoid larger penalties:
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File on time, even if you can’t pay in full.
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Make a partial payment to reduce penalties.
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Contact the IRS to set up a payment plan if needed.
How Long Does It Take to Get a Tax Refund?
If you e-file your return and use direct deposit, the IRS usually issues refunds within 21 days. Paper-filed returns or mailed checks can take longer. You can track your refund status using the IRS’s “Where’s My Refund?” tool online.
Why Timely Bookkeeping Matters for Tax Planning
Accurate and up-to-date bookkeeping is the foundation for stress-free tax filing. When your financial records are current, you can identify deductions, manage estimated tax payments, and plan strategically to reduce your taxes before year-end.
Timely bookkeeping also ensures you have accurate financial statements ready for tax season—making it easier for your accountant to create a tax-saving plan tailored to your business.
Partner with Experts for Year-Round Tax Support
At NumberSquad, we specialize in helping small business owners, freelancers, and self-employed professionals in Virginia, D.C., and Maryland stay compliant and save money through smart tax planning.
Our team provides automated bookkeeping, accurate financial reports, and year-round tax strategy support to ensure you meet every deadline confidently and minimize your tax burden.
Contact NumberSquad today to simplify your taxes and keep your business financially strong in 2026 and beyond.
