When do I have to pay for Pay Later?
If you split a payment, the payment + interest is distributed evenly across the amount of months you have chosen to split across. If you have chosen to split the payment between 3 months, a third is paid the first day in the following 3 months.
You make a purchase of 900 kr. on 10. of October. Two days later you decide to split the payment between 3 months. So on 1. November you pay 300 kr. + interest, on 1. December you also pay 300 kr. + interest, and on 1. January you pay your final instalment of 300 kr. + interest and have repaid the full amount.