Understand your Shopify invoice
If you have a Shopify Basic, Shopify, or Shopify Advanced plan, then Shopify emails an invoice every 30 days to the account owner of your store. For accounting reasons, you are billed in US dollars even if your store is located outside of the United States.
If you run a store in Canada, then you need to pay Canadian taxes even though your bill is in US dollars.
You can view your account history in the Invoices and fees section of the Account page in your Shopify admin. Click View outstanding charges in the Invoices and fees section to view your current invoice.
If you pick a plan during your free trial, then you'll receive your first invoice on the day that your free trial finishes. If your free trial already expired, then you'll receive your first invoice on the day that you pick a Shopify plan. The payment is taken automatically, so there isn't anything else that you need to do after picking a plan.
In addition to monthly subscription billing, Shopify also issues bills as necessary throughout the month according to your plan-based billing thresholds. Billing thresholds are dollar values that trigger billing whenever the cost of your account activity exceeds your account's threshold amount.