Utah Business Tax Extension — LLC & Partnership, S Corp, C Corp, Fiduciary

Utah generally grants a six-month filing extension when the required tax is timely paid. No separate extension form is normally required solely to obtain the filing extension.
The rules below cover 2025 calendar-year returns filed in 2026. Fiscal-year filers should apply the state’s month-based rules to their own tax-year end.

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Utah rules depend on entity type. Confirm the entity’s classification, file the required extension or retain federal proof when applicable, and pay required tax by the original deadline.

LLC / Partnership → Sept. 15, 2026 S Corp → Oct. 15, 2026 C Corp → Oct. 15, 2026 Fiduciary → Oct. 15, 2026

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Entity-Specific Extension

Utah Business Tax Extension — LLC & Partnership

A calendar-year partnership or LLC taxed as a partnership generally files Form TC-65 when a Utah filing obligation applies. For the 2025 calendar-year return, the extended filing deadline is September 15, 2026.

Extension checklist

Extended deadline	September 15, 2026
Utah return	Form TC-65
Extension method	Automatic six-month extension; use TC-559 or online services for payment
Payment	Pay required PTE and withholding tax by March 16

The extension applies to filing time only. Pay required Utah tax by the original deadline to limit penalties and interest.

Entity-Specific Extension

Utah Business Tax Extension — S Corp

A calendar-year S Corp generally files Form TC-20S when it has a Utah filing obligation. For the 2025 calendar-year return, the extended filing deadline is October 15, 2026.

Extension checklist

Extended deadline	October 15, 2026
Utah return	Form TC-20S
Extension method	Automatic six-month extension when the payment requirement is met
Payment	Pay at least 90% of current-year tax or 100% of prior-year tax

The extension applies to filing time only. Pay required Utah tax by the original deadline to limit penalties and interest.

Entity-Specific Extension

Utah Business Tax Extension — C Corp

A calendar-year C Corp generally files Form TC-20 and must follow Utah corporate-income-tax extension rules. For the 2025 calendar-year return, the extended filing deadline is October 15, 2026.

Extension checklist

Extended deadline	October 15, 2026
Utah return	Form TC-20
Extension method	Automatic six-month extension when the payment requirement is met
Payment	Pay at least 90% of current-year tax or 100% of prior-year tax

The extension applies to filing time only. Pay required Utah tax by the original deadline to limit penalties and interest.

Entity-Specific Extension

Utah Business Tax Extension — Fiduciary / Estate / Trust

A calendar-year estate or trust generally files Form TC-41 when it has a Utah fiduciary filing obligation. For the 2025 calendar-year return, the extended filing deadline is October 15, 2026.

Extension checklist

Extended deadline	October 15, 2026
Utah return	Form TC-41
Extension method	Automatic six-month extension; make any extension payment online or with the applicable voucher
Payment	Pay fiduciary tax by April 15

The extension applies to filing time only. Pay required Utah tax by the original deadline to limit penalties and interest.

Utah Business Tax Extension — Quick Reference

State agency	Utah Department of Revenue
Entity returns	Form TC-65, Form TC-20S, Form TC-20, Form TC-41
Extension rule	Utah generally grants a six-month filing extension when the required tax is timely paid. No separate extension form is normally required solely to obtain the filing extension.
Payment	An extension of time to file generally does not extend the time to pay.

Utah Business Tax Extension FAQs

Does Utah grant a business filing extension?

Yes, when the applicable entity-specific requirements listed above are satisfied.

Does the extension extend payment time?

Generally no. Pay required tax by the original deadline and confirm the current state payment rules.

Do all entity types use the same deadline?

No. Partnerships, S Corps, C Corps, and fiduciaries can use different original dates, extension periods, or forms.

Where can I verify the current rules?

Review the Utah Department of Revenue guidance for the entity’s return.