As Benjamin Franklin once said: "...nothing can be said to be certain, except death and taxes"
We are a UK based company, so we charge VAT on goods to UK customers; this is included in the price you see.
For the EU, we charge VAT at your country's rate under €150 at checkout. Above this VAT is paid on delivery.
For the USA, tariffs are set at 10% of your order value, which is included in your pricing, and you should not be charged additional fees once the item arrives.
Rest of World, this depends on your locations de minimis rules; each country has differing rules about how much you are allowed to import VAT and tariff-free. If it is over your country's allowance, you will be charged upon delivery.