USA Tax Calendar & Authorities

USA Tax Calendar & Authorities
US

Plan federal deadlines and reach the right state tax authority

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Federal core dates

IRS planning anchors

  • Mid-April: common anchor for individual returns, first estimated payment, and extensions.
  • Mid-June: common anchor for second estimated payment.
  • Mid-September: common anchor for third estimated payment.
  • Mid-October: common anchor for many extended individual returns.
  • Mid-January: common anchor for fourth estimated payment.
Open IRS Publication 509 Open IRS filing guide
Authority directory

Official state lookup

State deadlines vary by tax type, filing method, entity type, and local rules. Use the Federation of Tax Administrators directory and state forms index to confirm the live agency and current forms.

Open FTA tax agencies Open state tax forms

Monthly planning calendar

One month per row. Federal anchors are broad planning reminders, while state due dates should always be confirmed with the state authority.

January

January tax planning

Federal estimated tax payment for Q4 is commonly due around mid-January for many taxpayers. Review wage withholding, 1099 reporting prep, and state annual filing calendars.

February

February tax planning

Business information returns and payroll tasks often continue. Check state agency portals for annual reconciliations, withholding returns, and sales tax schedules.

March

March tax planning

Partnerships and S corporations often face key federal filing dates in March. Confirm state entity deadlines and extension rules with your state authority.

April

April tax planning

Individual federal returns, many C corporation filings, first-quarter estimated taxes, and extension requests are typically centered around mid-April.

May

May tax planning

Use May as a follow-up month: refund tracking, notices, account corrections, and any post-filing state obligations. Businesses should review monthly sales or payroll cycles.

June

June tax planning

Second-quarter estimated taxes are typically due in mid-June. Multi-state businesses should confirm nexus, sales tax registrations, and seasonal filing needs.

July

July tax planning

Mid-year check: payroll, withholding accuracy, sales tax registrations, and business entity compliance. Some states issue annual report or renewal reminders in this period.

August

August tax planning

Back-to-school sales tax holiday seasons may apply in some states. Monitor state revenue announcements and local filing requirements.

September

September tax planning

Third-quarter estimated tax payments are typically due in mid-September. Businesses should review extension status and upcoming year-end compliance needs.

October

October tax planning

Extended individual federal returns are commonly due in mid-October. State deadlines may follow federal timing or differ by jurisdiction.

November

November tax planning

Year-end tax planning month. Review withholding, bonus payroll effects, entity payments, and any state notice or reconciliation requirements.

December

December tax planning

Prepare for year-end reporting, W-2 and 1099 workflows, payroll cutoff timing, and next-year estimated tax planning. State annual deadlines can appear early in the new year.

State authorities

All 50 states plus D.C. One card per row. Use these cards as the clean directory layer, then open the official directory/forms pages for the current live contacts and filings.

5

California

California Franchise Tax Board / California Department of Tax and Fee Administration

FTA directory State forms
Important: this plugin is a planning calendar and authority directory, not a legal guarantee of each deadline. Federal dates are based on IRS calendar guidance, and state deadlines vary by return type and jurisdiction.