Deferred interest is interest that is postponed during a promotional period but will be added retroactively if the balance is not paid in full by the deadline.
It is common in:
During the promotional period, interest accrues in the background — but is not charged unless conditions are not met.
Deferred interest can be expensive if misunderstood.
Example:
All accrued interest from day one may be added to your balance at once.
This differs from true 0% APR offers, where interest is not retroactively applied.
The difference can cost hundreds of dollars.
Does interest accrue during the promo period?
Usually yes.
What happens if I miss the deadline?
Accrued interest is typically added to your balance.
Is deferred interest common?
Yes, especially in retail financing.