- Railroad company statement of private rail car miles due (RCW 84.16.030)
- Personal property listing forms are due to the county assessor (RCW 84.40.020, 040, 060 and 130)
- First half taxes are due. If taxes are less than $50, full payment is due. Second half payment is due October 31 (RCW 84.56.020)
- (Prior to May 1) PUD Privilege Tax billings are issued (RCW 54.28.040).
*IF A DUE DATE FALLS ON A SATURDAY, SUNDAY, OR LEGAL HOLIDAY, THE DUE DATE CHANGES TO THE NEXT BUSINESS DAY (RCW 1.12.070)