Business License
The City of Montesano does not collect a business tax, such as a B & O tax. There is an annual business license fee of $50, regardless of the size of the business.

Sales Tax
One tenth of one percent of the overall state sales tax that businesses in the city limits of Montesano collect is returned to the City of Montesano. Currently the sales tax in Montesano is 8.4%.
 
Sales tax is charged at point of sale and the percentage varies from city to city and county to county. See the Washington State Department of Revenue's Sales and Use Tax Rates page to find what the tax rate is in a particular locality in the state.