Construction & Trades Bookkeeping in Washington

The question that decides Washington sales tax for construction and trades is how labor, materials, and installation are treated — states split on whether the contractor is the end consumer of materials or a reseller, and whether installation labor is taxable. No income tax, but the Business and Occupation tax applies to gross receipts by activity classification and is reported alongside sales tax. We code parts and labor separately on every job so the treatment is deliberate.

Contractor and trade licensing in Washington is administered separately from tax registration, and the entity itself is registered with the Washington Secretary of State. Licensing is not bookkeeping, but it touches the books — license and permit costs, bonding, and insurance all need consistent treatment, and lenders reviewing a construction and trades file will look for them. Where Washington bites hardest is the overlap: a licence renewal can be held up by a delinquent account with the Washington Department of Revenue, so a sales tax balance nobody reconciled becomes a licensing problem rather than just a tax one.

Employer registration in Washington runs through the Washington Employment Security Department, a different agency from the Washington Department of Revenue that handles your sales tax — a separate account number, a separate login, and separate deadlines. Standing with one says nothing about standing with the other, and for construction and trades the first sign of a gap is usually a notice rather than a reminder. Your unemployment insurance rate is set by the Washington Employment Security Department from your own claims history, which means it is a cost you can actually influence — and one that quietly changes each year while the payroll journal entry stays the way somebody set it up.

The Washington statewide base rate is 6.5%. That is among the highest state rates in the country before a single local rate is added, which makes a miscoded category expensive per transaction rather than merely untidy. Sourcing is where this is won or lost, and with economic nexus set at $100,000 in sales, it becomes your problem the moment that threshold is crossed.