You can register for the access to the customs database over this link to look up worldwide customs tariffs. This access is free for Swiss companies ; in case you receive an error message, please send an e-mail to firstname.lastname@example.org and your account will be activated.
The EU import duties can also be looked up in the TARIC database.
The Swiss import duties are published in the Swiss Working Tariff Tares.
The customs tariff number is necessary for all queries.