Pay first-half property tax by April 30. Washington first-half property taxes are due April 30 (the whole bill if it is under $50), and paying late starts interest on the full year's tax, at 9% a year for residential parcels of four or fewer units and 12% a year plus penalties for larger or nonresidential parcels.
Pay second-half property tax by October 31. Washington second-half property taxes are due October 31, and a late payment adds interest on the unpaid half, at 9% a year for residential parcels of four or fewer units and 12% a year plus an 8% penalty on December 1 for larger or nonresidential parcels.
The Washington rules
Each rule shows its schedule, its primary sources, and the date it was last verified.
Pay second-half property tax by October 31
Related rules in Washington
The Washington guide lists every compliance obligation, the seasonal maintenance calendar, and baseline upkeep.
Open the Washington landlord guide · Property tax deadlines in every state
What Landautomate does with this page
This guide is the reading version of the Landautomate Washington rule base. In the app, the same rules become dated tasks on each Washington property, timed to its purchase date, lease dates, age, and climate, with an email before each one is due. The free preview shows a sample of that schedule for Washington in under a minute, no account needed.
See this calendar built for your own property
The free preview takes a state and a few property facts and shows the schedule Landautomate would run, no account needed. Every new account starts with a 30-day free Pro trial, no card required.