I currently have two “zero interest” loans that I’m paying off. The first was for my LASIK procedure, the other for a new couch. Both basically involved getting a store / health credit card, and the cost was charged to it. The LASIK deal was “12 months no interest”. The sofa was “no payments for 12 months, no interest for 24”. I got both in March of last year.
I get a monthly statement for each card. The furniture card has “minimum payment: $0.00” (since I’m still in the “no payment” period), and the LASIK card has a minimum payment of around $50 (nowhere near enough to pay it off within 12 months). The statement also lists the “deferred” interest accrued. As long as I make the minimum payment, the interest is not added to the balance. I’m assuming that the deferred interest also includes the interest charges on the deferred interest. At the end of the special deal term , if the balance has not been paid off then all the retroactive interest is applied to the remaining balance, and interest then accrues each month until the charge is paid off. The interest also gets rolled into the balance if you don’t make the minimum payment or have a late payment.
The term expirations are handled on a per-charge basis. So if I went back to the furniture store and bought something with the same financing on my existing card, that balance is tracked with it’s own term, not the original item. I’m not sure how payments are applied to the individual charges in that situation, though. Ideally, you’d want payments to go to the older one, but applying payment to the newer charge may be one of the fine-print “gotchas” to get consumers to pay the interest.
There is no fee or penalty for paying off the balance prior to the interest free cutoff (I double checked this), and the LASIK charge definitely didn’t include any financing fees (the price was the same whether I financed through them or paid in full with check / credit). I can’t remember off-hand if there was a finance fee at the furniture store, I don’t have access to the paperwork from where I’m at to double check. I also don’t remember the exact interest rate (since I have absolutely no intention of paying any of it), but I think it was in the 20s%.
The catch is that you have to be dedicated to working the system. For a 12 month term, divide the price by 11 (just to keep some wiggle room), and make sure that you can afford that much each month. Get the payments in before the due date (online banking is really nice for this, since it’s generally faster and more reliable than mailing checks, and I can schedule to pay automatically so I don’t forget). And just because they claim you don’t have to make a payment doesn’t mean you shouldn’t send them money anyway.
The companies probably make their money in a couple of ways: first, there’s the fact that by making it easier for people to buy more high-end products, they sell more (and make more profit). Second, there’s the interest income from people who lapse in their payments. And then there are the financing fees (if included at all).