Next deadline: Oct. 15

Federal tax deadlines

Oct. 15, 2026 Extended 2025 individual and calendar-year C corporation returns
Jan. 15, 2027 Last 2026 estimated tax payment

Full deadline calendar

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Latest update

Sept. 29, 2026Businesses

Year-end tax planning for business owners

Five things to settle before Dec. 31, while there is still time to act on them.

By Thomas ReinholtPartner, business tax · 1 min read

Thomas ReinholtPartnerAll updates by Thomas

6 updates, newest first. Showing 1 to 6.

Sept. 24, 2026

Nonprofits

Does your nonprofit need a single audit?

The threshold is $1,000,000 in federal awards spent in a fiscal year that began on or after Oct. 1, 2024.

By Andrea Lindgren
Sept. 16, 2026

Individuals

Filing on extension: what to send us before Oct. 15

Extended 2025 individual returns are due Oct. 15, 2026.

By Maria Delgado-Kunz
Sept. 9, 2026

Businesses

Review or audit: what your lender is asking for

An audit gives reasonable assurance; a review gives limited assurance. The loan agreement says which you need.

By Karen Szymanski
Sept. 2, 2026

Individuals

Answering an IRS notice: the first three steps

Find the notice number and the reply date, then send us a copy.

By Maria Delgado-Kunz
Aug. 26, 2026

Nonprofits

Form 990: which version your nonprofit files

Gross receipts and total assets decide between the 990-N, the 990-EZ and the full 990.

By Andrea Lindgren

General information, not tax, accounting or legal advice for your situation. Each item is dated when published.