Tabby will notify you via email or SMS about your payment due date after it receives your payment request and approval. 

Tabby - Pay later
 The due date is 14 days after order delivery or 30 days after your purchase, whichever comes earlier.

Tabby - Pay in installments 
 Your first payment, which is 25% of your order value, will be deducted immediately. Your other payments will occur in 3 monthly installments. 

You can also log in to your Tabby account and see all your due payments.