If you buy during the 14-day free trial, you will pay at the end of the free trial period.
When the free trial ends and you purchase through your Smoobu profile the Professional version, you will receive your first invoice the next day at 00:00 hs. Your invoice must be paid within 10 days of invoice reception.
Your invoices will be sent by email and will be made available directly in your Smoobu profile, here.
If you have chosen to pay by bank transfer, you can find Smoobu's bank details within your invoice.
If you chose credit card or direct debit, your card will be charged you on the day after the end of the free trial period.
More information can be found here: Where do I find the invoices for my Smoobu subscription?