Trust tax return extended due dates vary by country, trust type, and fiscal year-end. For U.S. calendar-year trusts filing Form 1041, the initial deadline is April 15, with an automatic 5-month extension to September 30 upon filing Form 7004.

U.S. Deadlines (Form 1041)

Calendar-year estates and trusts (ending December 31) have these key dates for the 2025 tax year:

Filing TypeInitial Due DateExtended Due DateExtension Form
Calendar-Year TrustsApril 15, 2026September 30, 20267004
Fiscal-Year Trusts15th day of 4th month after year-end30th day of 5th month after year- end7004
[7][4] Extensions require timely filing of Form 7004 by the original deadline, but they only extend filing—not payment, which avoids penalties if paid by April 15. Trustees should confirm eligibility, as certain trusts (like Qualified Disability Trusts) may differ.

Canadian Context (T3 Returns)

In Canada, most trusts end December 31, with T3 returns due by March 31 (90 days post-year-end). No standard 6-month extension exists like in the U.S.; special relief has applied in past crises (e.g., 2020 extensions to September 1). Recent 2026 updates emphasize strict March 31, 2026, compliance for 2025 year-ends to avoid penalties.

Bottom TL;DR: U.S. calendar-year trusts extend to September 30, 2026 (from April 15); Canada sticks to March 31, 2026 without routine extensions. Always verify with IRS/CRA for your specifics.

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