Sales tax (if any) is set by the states, so it varies. For me, it would be: $582.99 (Amazon price with free shipping) + $34.98 (6% sales tax) = $617.97 I'd only pay $582.99 on the purchase now though, as Amazon doesn't collect Pennsylvania sales tax. When I pay my state income tax at the end of the year, there's an accompanying form upon which I can report all the online purchases I've made so I can calculate and pay sales tax on them. Ahem.