Washington: Sales Tax Handbook
Calendar of Washington Sales Tax Filing Dates
Depending on the volume of sales taxes you collect and the status of your sales tax account with Washington, you may be required to file sales tax returns on a monthly, semi-monthly, quarterly, semi-annual, or annual basis.
On this page we have compiled a calendar of all sales tax due dates for Washington, broken down by filing frequency. The next upcoming due date for each filing schedule is marked in green.
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QUARTERLY FILING
| Filing Period | Due Date | Extended Due Date |
|---|---|---|
| Q1 (Jan - Mar) | April 30 | April 30 |
| Q2 (Apr - Jun) | July 31 | July 31 |
| Q3 (Jul - Sep) | October 31 | October 31 | Q4 (Oct - Dec) | January 31 | January 31 |
MONTHLY FILING
| Filing Period | Due Date | Extended Due Date | January | February 25 | February 25 | February | March 25 | March 25 |
|---|---|---|
| March | April 25 | April 27 1 |
| April | May 25 | May 26 |
| May | June 25 | June 25 |
| June | July 25 | July 27 |
| July | August 25 | August 25 |
| August | September 25 | September 25 |
| September | October 25 | October 26 |
| October | November 25 | November 25 |
| November | December 25 | December 28 | December | January 25 | January 25 |
ANNUAL FILING
| Filing Period | Due Date | Extended Due Date | 2015 | January 25 | January 25 |
|---|
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