File Your State Sales Tax Returns Faster and Easier with Autofill Forms

Overview

It’s important to know the due dates associated with the filing frequency assigned by the Washington Department of Revenue. This way you’ll be prepared and can plan accordingly. Failure to complete filing by the assigned date can lead to fines.

When is Washington sales tax due?

The Washington Department of Revenue requires all sales tax filing to be completed on or before the 20th day of the month following the completion of the filing period. Below, we’ve grouped Washington sales tax due dates by filing frequency (monthly, quarterly, or annual filing) for your convenience.

Monthly Filing Due Dates

For sellers who have been assigned to the monthly filing frequency, the Washington Department of Revenue has set the following filing deadlines for 2015 sales and use tax returns:

2016 Collection Period Filing Deadline
January February 20, 2016
February March 20, 2016
March April 20, 2016
April May 20, 2016
May June 20, 2016
June July 20, 2016
July August 20, 2016
August September 20, 2016
September October 20, 2016
October November 20, 2016
November December 20, 2016
December January 20, 2017

Quarterly Filing Due Dates

For sellers who have been assigned to the quarterly filing frequency, the Washington Department of Revenue has set the following filing deadlines for 2015 sales and use tax returns:

2016 Collection Period Filing Deadline
Q1 (Jan – Mar) April 30, 2015
Q2 (Apr – June) July 31, 2015
Q3 (July – Sept) October 31, 2015
Q4 (Oct – Dec) January 31, 2016

Annual Filing Due Dates

For sellers who have been assigned to the annual filing frequency, the Washington Department of Revenue has set the following filing deadlines for 2015 sales and use tax returns:

2016 Collection Period Filing Deadline
January – December January 31, 2016

What if a filing date is on a weekend or holiday?

In a case where a filing deadline falls on a weekend or holiday, the deadline is moved to the next business day. This is typically the Monday following a weekend or the day after the holiday.

What happens if I’m prevented from filing on time due to something out of my control?

In the event of a missed Washington sales tax filing deadline due to circumstances beyond your control (weather, accident, act of God), the Washington Department of Revenue will grant you an extension. However, you may be asked to provide evidence supporting your claim.