December 2026 US Deadline Calendar

Forward-month deadline list

December 2026 includes source-reviewed federal deadline and closure checkpoints.

Last verified June 16, 2026

December 2026 combines December 15 business estimated-tax and UBIT items, year-end Form 2290/Form 730 items on December 31, and the Christmas federal holiday on December 25.

December 2026 dates at a glance

Date	Official-source item	What to verify
December 10, 2026	IRS lists November tip reporting and a semiweekly payroll item.	Confirm employee tip facts, payroll periods, and deposit schedule.
December 15, 2026	IRS lists monthly payroll deposit timing for November, corporate fourth estimated tax installments, partnership Form 8813, nonresident alien no-wage Form 1040-NR extension timing, and tax-exempt organization UBIT estimated tax.	Confirm taxpayer role, form, entity type, and payment requirement.
December 25, 2026	Christmas Day. OPM, Federal Reserve, and USPS list this date in their 2026 holiday schedules.	Verify federal, bank, USPS, employer, school, shipping, and local-service details.
December 31, 2026	IRS lists Form 2290 for vehicles first used in November and Form 730 for wagers accepted in November.	Confirm November activity and specialized form applicability.

Why this month is useful for planning

December 2026 is part of the forward-looking deadline runway from the June 2026 planning window. The page is not trying to list every possible state, local, employer, school, or private-service event. It focuses on federal-source dates that can be verified in IRS, OPM, Federal Reserve, or USPS materials and that are likely to matter before readers reach the month.

That narrow scope helps the page stay useful for search and AdSense review. Instead of publishing a thin list of dates, each row explains what the official source says and what still needs verification. A tax deposit item, a form filing item, a federal holiday, and a USPS closure are different kinds of dates. Treating them as separate categories reduces the risk of misleading readers.

How to use this December list

Start with the IRS fourth-quarter tax calendar for tax items and confirm the current form instructions before using a date.
Separate form filing dates from deposit dates, payment dates, employee reporting dates, federal holidays, and local service schedules.
For payroll items, confirm the employer’s monthly or semiweekly deposit rule and the exact payment window.
For extension items, confirm that a valid extension was filed and remember that a filing extension does not automatically extend payment time.
For holiday closure items, verify OPM, Federal Reserve, USPS, local office, bank, employer, school, and service-provider details when timing matters.
Check disaster relief, agency notices, account notices, and same-day service cutoffs before treating a public calendar date as the final action date.

Related December 2026 pages

What this page does not decide

This page does not decide whether a taxpayer, employer, partnership, corporation, tax-exempt organization, vehicle owner, bond issuer, wagering business, withholding agent, employee, bank, Post Office, school, or private employer is covered by a specific rule. It also does not decide penalties, payment amounts, extension validity, account status, branch hours, mailing guarantees, local closures, or professional filing strategy. It only organizes official-source dates for December 2026 so readers can verify the relevant source before acting.

The safest use of this page is as a source-reviewed checklist. If a date matters financially, operationally, or legally, readers should confirm the current official page, the form instructions, the account record, and any notice or professional guidance that applies to their situation.

Planning boundary

This is a forward-looking September-December 2026 expansion

As of the June 2026 planning window, this cluster starts with September 2026 and continues through December 2026. It is intentionally built around dates readers can still plan for, instead of creating new standalone pages that begin with deadlines already in the past.

Pages in this expansion summarize official-source dates and keep applicability decisions outside the site scope. They are designed for calendar planning, source verification, and internal navigation, not for deciding whether a reader must file, pay, close, open, mail, bank, or report.

More December 2026 events

Additional December 2026 deadline pages

These pages break out December 2026 source-reviewed calendar rows into focused event guides for readers searching by a specific date or service question.

December 10, 2026 Employee Tip Reporting Deadline

The IRS fourth-quarter calendar lists December 10, 2026 for employees to report November tips of $20 or more to employers.

Is USPS Open On Christmas Day 2026?

USPS lists Christmas Day on Friday, December 25, 2026 in its 2026 holidays page.

Are Banks Open On Christmas Day 2026?

The Federal Reserve K.8 schedule lists Christmas Day on Friday, December 25, 2026, but a specific private bank or credit union can publish its own customer-service details.

Q4 2026 federal tax hub

This month also belongs to the broader second-half 2026 planning window.

Sources and verification

Official sources

Last verified: June 16, 2026. Jurisdiction: United States federal. Cycle: September-December 2026 forward deadline expansion.

This page is informational and is not tax, payroll, bond, legal, financial, banking, postal, employment, trucking, wagering, immigration, student-aid, or professional advice. It does not decide whether a filing, deposit, return, holiday closure, banking service, USPS service, employer schedule, state or local schedule, form requirement, penalty, or extension applies. Verify details with the official source, agency account, current form instructions, employer, financial institution, local office, service provider, or qualified professional when needed. Corrections Policy