How do you pay the annual fee for Pokemon Bank? - Answers

When your trial period or active pass has 14 days remaining, you will be prompted to purchase a new 365-day pass before your active pass is set to expire, which will be added to your existing days. To buy a new pass, you will need credit stored in your eShop account. Once the pass has expired, you will have a limited amount of time to use Pokémon Bank to withdraw or store your Pokémon. Once this timeframe expires, any stored Pokémon will be permanently lost. Additionally, you will be prompted to redeem a new pass.