A reader asked this question in the live chat just finished and I didn't give a very defintiive answer. Let me do so here.

Boeing does pay B&O sales tax on airplanes delivered out of Washington but at a reduced rate thanks to the 787 incentive package from 2003.

The regular B&O tax rate for manufacturing is 0.00484. The rate for aerospace manufacturing through 2024 is set at 0.002904. If manufactured in Washington, it is subject to this tax, even if it is sold and delivered elsewhere.

So I think that means for the early Dreamliners delivered, the state should get about $100 million (the approximate market value) x 0.002904, which is about $290,000. Of course, the first jets were so delayed and so reworked that Boeing had to compensate the airlines, so the earliest ones may have a sales tag lower than $100 milllion.

In addition, Boeing (and other aerospace manufacturers) get various tax credits from Washington state, including those for computer hardware and software, property taxes on new buildings, and pre-production development expenses on new jets.