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How to file Missouri sales tax

2026 due dates, filing frequencies, form 53-1, and official filing resources.

State return53-1
Monthly returns dueLast day of the month following the period
Filing frequenciesMonthly, Quarterly, Annual
Rules verifiedJuly 2, 2026

When is Missouri sales tax due?

Monthly Missouri sales tax returns are due the last day of the month following the period. Quarterly returns are due the last day of the month following the period (Apr 30 / Jul 31 / Oct 31 / Jan 31). When a due date lands on a weekend or federal holiday it moves to the next business day; the 2026 calendar on this page already applies that adjustment.

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Missouri sales tax due dates for 2026

Every date below comes from the state's published deadline rule (dataset 2026.07.0) and is already moved to the next business day when it lands on a weekend or federal holiday. Your account's assigned filing frequency decides which table applies.

Monthly Missouri sales tax due dates

Rule: Last day of the month following the period.

PeriodPeriod endsReturn due
January 2026Jan 31, 2026Mar 2, 2026 (moved: 2026-02-28 falls on a Saturday)
February 2026Feb 28, 2026Mar 31, 2026
March 2026Mar 31, 2026Apr 30, 2026
April 2026Apr 30, 2026Jun 1, 2026 (moved: 2026-05-31 falls on a Sunday)
May 2026May 31, 2026Jun 30, 2026
June 2026Jun 30, 2026Jul 31, 2026
July 2026Jul 31, 2026Aug 31, 2026
August 2026Aug 31, 2026Sep 30, 2026
September 2026Sep 30, 2026Nov 2, 2026 (moved: 2026-10-31 falls on a Saturday)
October 2026Oct 31, 2026Nov 30, 2026
November 2026Nov 30, 2026Dec 31, 2026
December 2026Dec 31, 2026Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday)

Quarterly Missouri sales tax due dates

Rule: Last day of the month following the period (Apr 30 / Jul 31 / Oct 31 / Jan 31).

PeriodPeriod endsReturn due
Q1 2026Mar 31, 2026Apr 30, 2026
Q2 2026Jun 30, 2026Jul 31, 2026
Q3 2026Sep 30, 2026Nov 2, 2026 (moved: 2026-10-31 falls on a Saturday)
Q4 2026Dec 31, 2026Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday)

Annual Missouri sales tax due dates

Rule: January 31 following the calendar year.

PeriodPeriod endsReturn due
Calendar year 2026Dec 31, 2026Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday)
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Missouri filing notes

  • Filers averaging $15,000+/month state sales tax owe quarter-monthly payments within 3 banking days of each quarter-month (info only).

Return and form

The principal repository-tracked return is 53-1. A paper channel exists, but the current form version and account eligibility still require confirmation.

Tracked form version: Revised 08-2024 (forms index rev date 8/7/2024)

Paper filing posture: accepted

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File Missouri sales tax from reviewed data, not spreadsheets

Prophit.ai tracks every Missouri due date above inside the return workspace, builds the period from your transaction data, and produces worksheet for portal entry that a reviewer approves before anything is submitted.

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Need every state at once? Download the 2026 sales tax filing calendar (CSV + ICS, all states, weekend/holiday-adjusted).

Workflow support does not by itself establish registration, filing authority, credentials, agency acceptance, or tax advice. Confirm your assigned filing frequency with the state.

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Missouri sales tax filing questions

01When is Missouri sales tax due?

Monthly Missouri sales tax returns are due the last day of the month following the period. Quarterly returns are due the last day of the month following the period (Apr 30 / Jul 31 / Oct 31 / Jan 31). When a due date lands on a weekend or federal holiday it moves to the next business day; the 2026 calendar on this page already applies that adjustment.

02How often do you file sales tax in Missouri?

Missouri assigns a filing frequency to each account. The published cadences are monthly, quarterly and annual filing; the state assigns the frequency based on tax volume and notifies the account, so confirm the assigned basis before relying on a calendar.

03What form is used to file Missouri sales tax?

The Missouri return tracked here is 53-1. The principal repository-tracked return is 53-1. A paper channel exists, but the current form version and account eligibility still require confirmation.

04What happens if a Missouri due date falls on a weekend or holiday?

The due date moves to the next business day. In 2026, 7 of the Missouri due dates listed on this page are adjusted for a weekend or federal holiday; each adjusted date is marked in the calendar.

05Can Missouri sales tax be filed on paper?

Paper filing posture tracked for Missouri: accepted. The principal repository-tracked return is 53-1. A paper channel exists, but the current form version and account eligibility still require confirmation.

Reviewed and current as of August 22, 2026. Read the full Missouri sales tax guide for rates, sourcing, products, exemptions, and marketplace rules.