Many thanks
If you open a seller account in the USA, Amazon only charges the initial $40, and after that they deduct the fee only once you start selling.
If your account remains inactive with no activity for an entire year, Amazon does not charge any additional fees.
What business model do you want to start?
Yes, if you open a professional seller account on Amazon US, Amazon charges a monthly subscription fee of 39.99 USD, and it starts immediately once the account is upgraded to a professional plan, not when you launch your first product.
The fee is charged regardless of whether you have active listings, sales, or inventory, and it continues every month until you downgrade to an individual plan or close the account. If you choose the individual plan instead, there is no monthly fee, but Amazon charges a per-item selling fee and limits access to certain tools and categories.
Most sellers switch to the professional plan as soon as they are ready to list seriously, because many categories, advertising features, and bulk listing tools are not available on the individual plan, and the subscription fee is not deferred or waived during setup or inactivity.