Tax deadlines 2027
Small business tax deadlines for 2027
One list of the federal dates owners miss most, in the order they arrive, with a page for each that says what to have ready. For a calendar tailored to your business type, use the free tax deadline calendar.
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Federal dates in order
These are for businesses and people on a calendar tax year, filing for 2026. If your tax year is different, your dates are different.
Dates checked October 26, 2026 against IRS Publication 509 (2027), early release draft. IRS early release draft of Publication 509 (2027). The final version can change a date. Confirm every date with the IRS and, for New Jersey, the NJ Division of Taxation before you rely on it.
What a missed date costs
The IRS adds penalties automatically, and they grow every month a return or payment is late:
- Filing late: usually 5% of the unpaid tax for each month or part of a month the return is late, up to 25%.
- Paying late: 0.5% of the unpaid tax each month, up to 25%, plus interest.
- Partnership and S corporation returns: a set penalty for every partner or shareholder, for each month the return is late, even when no tax is owed.
- 1099 and W-2 forms: a penalty for each form, which goes up the later the forms are filed.
- Estimated tax: paying too little each quarter costs an underpayment penalty, figured like interest on the shortfall.
Source: IRS Topic 653, penalties and interest. Books that are current make every one of these dates a routine job. Behind on your books? See catch-up bookkeeping or take the free books check.
Why these pages exist
Most missed deadlines are not a surprise. They are a pile of small jobs that were not started: a W-9 never collected, a bank account not reconciled, a payroll report that does not match the books. Each page below says which of those jobs sits behind a date, so the work can start months before the day.
- 1099-NEC and W-2 due date: contractor and employee forms, February 1, 2027.
- Partnership and S corporation return due date: March 15, 2027, and the extension.
- Estimated tax due dates: all four payments.
- Tax Day 2027: individual returns, Schedule C and the October extension, April 15, 2027.
- Payroll tax filing dates: Forms 940 and 941.
New Jersey
This page lists federal dates only. New Jersey has its own due dates for income tax, estimated payments, business returns and sales tax, set by the NJ Division of Taxation. New Jersey also applies its own test for who counts as an independent contractor: see our guide to the ABC test.
Questions
Do these dates apply to every business?
They apply to calendar-year filers and to the federal forms named. A business with a fiscal year, a different entity type or an approved extension has different dates. When in doubt, ask your CPA.
What happens when a due date falls on a weekend?
A due date that falls on a Saturday, Sunday or legal holiday moves to the next business day, which is why several 2027 dates are February 1 instead of January 31.
Why does the page say draft?
The IRS publishes next year's calendar in draft before the final version. IRS early release draft of Publication 509 (2027). The final version can change a date. We update this page when the final version is out.
Can you file my taxes?
MCC Solutions is not a CPA firm. Tax returns, elections and legal questions stay with your CPA, enrolled agent or attorney. Our part is getting the books accurate and organized so they can do that work faster.
MCC Solutions is not a CPA firm. Tax returns, elections and legal questions stay with your CPA, enrolled agent or attorney. Our part is getting the books accurate and organized so they can do that work faster.
Do it yourself
New Jersey Business Compliance Calendar 2027
One page that tells you what's due each month in 2027, with weekend dates already worked out.
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