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April 2026 Business & Trust Tax Deadlines

Spring brings a fresh wave of critical tax and compliance deadlines for businesses, employers, and fiduciaries. Whether you are managing cash flow for a growing company, closing escrow on a new property investment, or overseeing a family trust, staying ahead of these due dates is non-negotiable. Here are the primary April 2026 tax deadlines to keep your operations compliant.

Key April 15 Tax Deadlines

C-Corporations

Calendar-year C-Corps must file their 2025 income tax return (Form 1120) and pay any remaining tax due. If your business needs more time, you can request an automatic six-month extension by filing Form 7004. Keep in mind that an extension to file is not an extension to pay. You must estimate and deposit your expected tax liability to prevent late payment penalties. Additionally, your first installment for 2026 estimated corporate taxes is due on this date.

Fiduciary Returns

For those managing an estate or a trust, April 15 is the final day to timely file a 2025 calendar-year fiduciary return (Form 1041) or request an extension. We understand the importance of keeping trust tax preparation costs fair and transparent, so providing your documentation early ensures a smooth, cost-effective process.

Monthly Payroll & Non-Payroll Withholding

Employers subject to the monthly deposit rule must remit Social Security, Medicare, and withheld income taxes for payments made throughout March.

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April 30: Quarterly Filings & Unemployment

Form 941 & Federal Unemployment Tax (FUTA)

Employers must file Form 941 for the first quarter of 2026 and pay any undeposited taxes. If your tax liability is under $2,500, it can be paid in full with a timely filed return. Businesses that have already deposited their quarterly tax liability in full and on time are granted an extended filing deadline of May 11. Furthermore, any FUTA tax owed through March must be deposited if the balance exceeds $500.

Holidays and Disaster Extensions

If any federal due date falls on a weekend or a legal holiday, your deadline automatically shifts to the next business day. Additionally, businesses located in federally designated disaster areas—a frequent reality for our Texas clients during severe weather—may qualify for extended deadlines. You can verify active filing extensions by visiting FEMA and the IRS disaster relief portal.

Need proactive tax planning or assistance with your corporate and trust returns? Contact our office today to schedule your consultation.

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