2026 due dates, filing frequencies, form RI-STR, and official filing resources.
Monthly Rhode Island sales tax returns are due the 20th of the month following the period (Form RI-STR). Quarterly returns are due the last day of the month following the period (last day of Jul / Oct / Jan / Apr). 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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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.
Rule: 20th of the month following the period (Form RI-STR).
| Period | Period ends | Return due |
|---|---|---|
| January 2026 | Jan 31, 2026 | Feb 20, 2026 |
| February 2026 | Feb 28, 2026 | Mar 20, 2026 |
| March 2026 | Mar 31, 2026 | Apr 20, 2026 |
| April 2026 | Apr 30, 2026 | May 20, 2026 |
| May 2026 | May 31, 2026 | Jun 22, 2026 (moved: 2026-06-20 falls on a Saturday) |
| June 2026 | Jun 30, 2026 | Jul 20, 2026 |
| July 2026 | Jul 31, 2026 | Aug 20, 2026 |
| August 2026 | Aug 31, 2026 | Sep 21, 2026 (moved: 2026-09-20 falls on a Sunday) |
| September 2026 | Sep 30, 2026 | Oct 20, 2026 |
| October 2026 | Oct 31, 2026 | Nov 20, 2026 |
| November 2026 | Nov 30, 2026 | Dec 21, 2026 (moved: 2026-12-20 falls on a Sunday) |
| December 2026 | Dec 31, 2026 | Jan 20, 2027 |
Rule: Last day of the month following the period (last day of Jul / Oct / Jan / Apr).
| Period | Period ends | Return due |
|---|---|---|
| Q1 2026 | Mar 31, 2026 | Apr 30, 2026 |
| Q2 2026 | Jun 30, 2026 | Jul 31, 2026 |
| Q3 2026 | Sep 30, 2026 | Nov 2, 2026 (moved: 2026-10-31 falls on a Saturday) |
| Q4 2026 | Dec 31, 2026 | Feb 1, 2027 (moved: 2027-01-31 falls on a Sunday) |
The principal repository-tracked return is RI-STR. A paper channel exists, but the current form version and account eligibility still require confirmation.
Tracked form version: Form RI-STR (NEW 10/2022; for periods starting January 2023)
Paper filing posture: accepted
Prophit.ai tracks every Rhode Island 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.
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.
Monthly Rhode Island sales tax returns are due the 20th of the month following the period (Form RI-STR). Quarterly returns are due the last day of the month following the period (last day of Jul / Oct / Jan / Apr). 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.
Rhode Island assigns a filing frequency to each account. The published cadences are monthly and quarterly filing; the state assigns the frequency based on tax volume and notifies the account, so confirm the assigned basis before relying on a calendar.
The Rhode Island return tracked here is RI-STR. The principal repository-tracked return is RI-STR. A paper channel exists, but the current form version and account eligibility still require confirmation.
The due date moves to the next business day. In 2026, 5 of the Rhode Island due dates listed on this page are adjusted for a weekend or federal holiday; each adjusted date is marked in the calendar.
Paper filing posture tracked for Rhode Island: accepted. The principal repository-tracked return is RI-STR. A paper channel exists, but the current form version and account eligibility still require confirmation.
Reviewed and current as of October 26, 2026. Read the full Rhode Island sales tax guide for rates, sourcing, products, exemptions, and marketplace rules.
