The debit for the monthly subscriptions start the 26:th every month provided that the 26:th happens on a week day. Should the 26:th be a weekend the debit will start the next week day following the 26:th. Three more attempts will then be made the following week days if the first one fails.
The debits for the insurance fee and PT-payments work the same way, but these are debited from the 1:th every month instead.