Here's how it works:
Tabby - Pay later
Just log into your Tabby account before the due date of your payment, which will be 14 days after delivery or 30 days after your purchase, whichever comes earlier. You can use your Credit or Debit card to pay securely on Tabby. Rest assured, all your payment information is safe and processed securely by Tabby. 

Tabby - Pay in installments 
If you select this option, 25% of your cost will be deducted right away. The rest will be automatically deducted as installments from your card each month, for the 3 months of the installment period.