Farfetch includes duty charges to the US on their invoice when you check out. That is all you should pay.
The information can be found on the Farfetch website.
DUTIES & TAXES
We include the cost of taxes and duties in your order, so you won’t need to pay any additional fees if you are located in any of the locations below:
European Union, Canada, Brazil, China, Australia, New Zealand, Puerto Rico, Switzerland, Singapore, Republic of Korea, Kuwait, Qatar, Israel, India, Norway, Saudi Arabia, Taiwan, Thailand, U.A.E, Japan, Isle of Man, Guernsey, Jersey, San Marino, and Mexico.
If you are ordering from within your own customs zone or country, import duties will not be applicable however you may need to pay VAT or local sales taxes. For the UK and the USA, these are included at the final stage of checkout.
If a DAP (Delivery At Place) destination is selected (i.e. customers outside of the countries listed above), the price you pay to Farfetch will exclude all relevant import duties and sales taxes. As the recipient of the order, you must instead pay these duties and taxes directly to our carrier to release your order from customs. As we are unable to advise the exact amount, we recommend contacting your local customs office or tax authority before placing a DAP order.
SHIPPING TO USA
Items being shipped to the USA will have tax added at the final stage of checkout.