Southeast · KY
How to file Kentucky sales tax
2026 due dates, filing frequencies, form 51A102, and official filing resources.
- State return: 51A102
- Monthly returns due: 20th of the month following the period
- Filing frequencies: Monthly, Quarterly, Annual
When is Kentucky sales tax due?
Monthly Kentucky sales tax returns are due the 20th of the month following the period. Quarterly returns are due the 20th of the month following the period (calendar quarters). 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.
Kentucky 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 Kentucky sales tax due dates
Rule: 20th of the month following the period.
| 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 |
Quarterly Kentucky sales tax due dates
Rule: 20th of the month following the period (calendar quarters). This cadence is flagged for manual review against the state source before relying on it.
| Period | Period ends | Return due |
|---|---|---|
| Q1 2026 | Mar 31, 2026 | Apr 20, 2026 |
| Q2 2026 | Jun 30, 2026 | Jul 20, 2026 |
| Q3 2026 | Sep 30, 2026 | Oct 20, 2026 |
| Q4 2026 | Dec 31, 2026 | Jan 20, 2027 |
- Kentucky's non-monthly due dates follow DOR practice (20th after the period) but were not verified on an official page.
Annual Kentucky sales tax due dates
Rule: January 20 following the calendar year. This cadence is flagged for manual review against the state source before relying on it.
| Period | Period ends | Return due |
|---|---|---|
| Calendar year 2026 | Dec 31, 2026 | Jan 20, 2027 |
- Kentucky's non-monthly due dates follow DOR practice (20th after the period) but were not verified on an official page.
Kentucky filing notes
- Filers averaging over $50,000/month must remit by the 25th for the 16th–15th accelerated period (103 KAR 25:131) (info only).
Return and form
The principal repository-tracked return is 51A102. Paper eligibility is taxpayer-specific; electronic filing or a waiver may control.
Paper filing posture: taxpayer specific
Official Kentucky filing resources
File Kentucky sales tax from reviewed data, not spreadsheets
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Workflow support does not by itself establish registration, filing authority, credentials, agency acceptance, or tax advice. Confirm your assigned filing frequency with the state.
Kentucky sales tax filing questions
When is Kentucky sales tax due?
Monthly Kentucky sales tax returns are due the 20th of the month following the period. Quarterly returns are due the 20th of the month following the period (calendar quarters). 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.
How often do you file sales tax in Kentucky?
Kentucky 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.
What form is used to file Kentucky sales tax?
The Kentucky return tracked here is 51A102. The principal repository-tracked return is 51A102. Paper eligibility is taxpayer-specific; electronic filing or a waiver may control.
What happens if a Kentucky due date falls on a weekend or holiday?
The due date moves to the next business day. In 2026, 3 of the Kentucky due dates listed on this page are adjusted for a weekend or federal holiday; each adjusted date is marked in the calendar.
Can Kentucky sales tax be filed on paper?
Paper filing posture tracked for Kentucky: taxpayer specific. The principal repository-tracked return is 51A102. Paper eligibility is taxpayer-specific; electronic filing or a waiver may control.