Consumers often conflate deferred interest promotions with the true 0% introductory APR offers common on mainstream travel cards. They are radically different mechanisms. True zero-percent APR cards forgive interest entirely during the promotional term; if you have a balance remaining when month twelve ends, interest applies only to that remaining sliver.
Big-box store credit card APR programs rarely work that way. Both Lowe's and Home Depot utilize deferred interest terms on promotional financing tiers. When a contract promises "No interest if paid in full within 6 months," interest continues to accrue in the background from the precise transaction date.
If you finance a $2,000 table saw setup and leave even $15 unpaid when the 180-day promotion ends, the lender calculates interest on the entire original $2,000 balance retroactively at a rate hovering near 31.99% APR. That minor oversight instantly adds several hundred dollars in finance charges to your statement. Anyone utilizing home improvement financing promotions must set aggressive automated payments to clear the balance at least two weeks before the final cutoff.
