For a car, what scams can be plotted with 0% financing vs rebate?
The car deal makes money 3 ways. If you pay in one lump payment. If the payment is greater than what they paid for the car, plus their expenses, they make a profit. They loan you the money. You make payments over months or years, if the total amount you pay is greater than what they paid for the car, plus their expenses, plus their finance expenses they make money. Of course the money takes years to come in, or they sell your loan to another business to get the money faster but in a smaller amount. You trade in a car and they sell it at a profit. Of course that new transaction could be a lump sum or a loan on the used car... They or course make money if you bring the car back for maintenance, or you buy lots of expensive dealer options. Some dealers wave two deals in front of you: get a 0% interest loan. These tend to be shorter 12 months vs 36,48,60 or even 72 months. The shorter length makes it harder for many to afford. If you can't swing the 12 large payments they offer you at x% loan for y years that keeps the payments in your budget. pay cash and get a rebate. If you take the rebate you can't get the 0% loan. If you take the 0% loan you can't get the rebate. The price you negotiate minus the rebate is enough to make a profit. The key is not letting them know which offer you are interested in. Don't even mention a trade in until the price of the new car has been finalized. Otherwise they will adjust the price, rebate, interest rate, length of loan,  and trade-in value to maximize their profit. The suggestion of running the numbers through a spreadsheet is a good one. If you get a loan for 2% from your bank/credit union for 3 years and the rebate from the dealer, it will cost less in total than the 0% loan from the dealer. The key is to get the loan approved by the bank/credit union before meeting with the dealer. The money from the bank looks like cash to the dealer. "Here's a number-crunching example of how the ""Zero interest rate"" offer is misleading. Suppose the offer is that a car ""costs $24,000.00 with zero percent financing over 24 months""  or as an alternative, ""$3,000.00 off for cash"". Ignore the hype:  the quoted prices and the quoted interest rates.  Look at what really happens to two people who take advantage of the two offers, One person hands over $21,000.00 cash, and leaves with the new car. The second promises to make 24 payments of $1000.00, one a month, starting in one month's time, and also leaves with the same make and model new car. The two people have received exactly the same benefit, so the two payment schemes must have the same value. A mortgage program will tell you that paying off a $21,000.00 loan by making 24 monthly payments of $1000.00 requires an interest rate of 1.10% a month, or an effective annual rate of 14.03%."
It depends how detailed you want to get in your calculation, but fundamentally, 1K < 25K.   On a very basic level, divide the cost (less what you sell it for) by the time you'll have the car for.  If you junk it, $1K/12 month = $83/month to buy tires to have a car for a year. If you sell it for $1K, then it become $0/month.  (Plus other maintenance, etc..., obviously). If you pay 25K and keep the new car for ten years and sell it for nothing, it becomes roughly $208/month (plus maintenance). If you want to get more accurate, there are a lot of variables you can take into account--time cost of money, financing, maintenance costs of different vehicle types, etc... Its not a scam.  The car dealership does not care how you pay for the car, just that you pay.  If you come to them for a loan they will try and service you.  If you come with cash, they will sell you a car and not try to talk you into financing.  If you come with a check from another bank, they will happily accept it. I would try to work with Equifax or a local credit union to figure out what is going on.  Somehow she probably had her credit frozen. Here are some really good things to mitigate this situation: Oh and make sure you do #1 and forget about financing cars ever again.  I mean if you want to build wealth. Never buy a new car if cost is an issue. A big chunk of the price will disappear to depreciation as you drive it off the lot. If you want a shiny new car with the latest equipment (and if you can afford it!), buy a lightly-used car. Normally I would recommend a 1-3 year old car. 95% of the value, with a big cost savings. But this depends on your financial situation. Given that you just need a commuter car for mostly highway driving, in a place where the weather is easier on cars, you could be fine with a 5-6 year old import. Camry's, Accords, Civics, etc are all well-built, reliable, and affordable due to their numbers. As for financing, shop around. Don't blindly use dealer financing. Check with banks and especially local credit unions and see what rate they can offer you. Then, when you are ready to go, get pre-approved (this is when they pull your credit) and get the car. "I started a business a few years ago.  At one point it wasn't going so well and my father ""loaned"" me an amount not too dissimilar to what you've done. From a personal perspective, the moment I took that loan there was a strain the relationship.  Especially when I was sometimes late on the interest payments...  Unfortunately thoughts like ""he doesn't need this right now, but if I don't pay the car loan then that is taken away"" came up a few times and paying the interest fell to the bottom of the monthly bill payment stack. At some point my wife and I finally took a hard look at my finances and goals.  We got rid of things that simply weren't necessary (car payment, cable tv, etc) and focused on the things we needed to.  Doing the same with the business helped out as well, as it helped focus me to to turn things around.  Things are now going great. That said, two of my siblings ran into their own financial trouble that our parents helped them on.  When this happened my father called us together and basically forgave everyone's debt by an equal amount which covered everything plus wrote a check to the one that was doing fine.  This ""cleared the air"" with regards to future inheritance, questions about how much one sibling was being helped vs another, etc.  Honestly, it made family gatherings more enjoyable as all that underlying tension was now gone. I've since helped one of my children.  Although I went about it an entirely different way.   Rather than loan them money, I gave it to them.  We also had a few discussions on how I think they ought to manage their finances and a set of goals to work towards which we co-developed.  Bearing in mind that they are an individual and sometimes you can lead a horse...  Given the current state of things I consider it money well ""spent""." If a shop offers 0% interest for purchase, someone is paying for it. e.g., If you buy a $X item at 0% interest for 12 months, you should be able to negotiate a lower cash price for that purchase. If the store is paying 3% to the lender, then techincally, you should be able to bring the price down by at least 2% to 3% if you pay cash upfront. I'm not sure how it works in other countries or other purchases, but I negotiated my car purchase for the dealer's low interest rate deal, and then re-negotiated with my preapproved loan. Saved a good chunk on that final price! I too was very confused when I tried to be tricky and paid down my balance BEFORE the bill date. I thought this would be a great thing because it would show my utilization near zero percent. The opposite happen, it dropped my credit score from 762 to 708. Here is the best example I can come up with when it comes to utilization. Lets pretend you are an insurance company and you trying to figure out who are the best risk drivers. The people that drive 10% of the day are a better risk than the people that drive 50% of the day. The people that drive 50% of the day are a better risk than the people that drive 90% of the day. Here is the rub when people drive 0%. When you look at the people at 0% they appear to be walking, busing or flying. What they are NOT doing is driving. Since they are not driving (using Credit) they are viewed as POOR drivers since they are not keeping up on their driving skills. (Paying bills, watching how they spend, and managing their debt). So, now before the billing date I pay down my balance to something between 5 to 10% of my utilization. After the bill is issued, I pay it off in FULL. ( I am not going to PAY these crazy interest rates). What shows up on my credit report is a person that is driving his credit between 5 and 10% utilization. It shows I know I how to manage my revolving accounts. I know it's dumb, you would think they reward people that have zero debt, I don't hate banks I hate the game. ( I do love me some reward points =)) "Here's the issue as I see it. The fact that one has high interest debt says a lot about the potential borrower. Odds are very good that person will not pay the zero card off before the rate expires, and will likely charge more along the way.  I'd love to be able to say ""great idea, borrowing at a low rate to pay off a high rate card will be the first step to getting you all paid off"" but chances are in a year's time you will not be better off.  You said you know a lot of people that have done this. Have they all been successful? It's possible, but I'd heed the warnings of those here and first think how you got into the credit card debt." "In addition to all the points made in other answers, in some jurisdictions (including the UK where I live) the consumer credit laws require the lender to allow the borrower to pay off the loan at any time. If the lender charges interest and the borrower pays off the loan early then the lender loses the interest that would have been paid during the rest of the loan period. However if the actual interest is baked into the sale price of an item and the loan to pay for it is nominally ""0%"" then the borrower still pays all the interest even if they pay off the loan immediately. If you think this game is being played then you can ask for a ""cash discount"" (or similar wording: I once had problems with a car salesman who thought I meant a suitcase full of used £20s), meaning you want to avoid paying the interest as you are not taking a loan."