Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why would a car company lend me money at a very low interest rate?
This is "incentive financing". Simply put, the car company isn't in the business of making money by buying government bonds. They're in the business of making money by selling cars. If you are "qualified" from a credit standpoint, and want to buy a $20k car on any given Sunday, you'll typically be offered a loan of between 6% and 9%. Let's say this loan is for three years and you can offer $4000 down payment and/or trade. The required monthly payment on the remaining $16k at the high end of 9% is $508.80, which over 3 years means you'll pay $2,316.64 in interest. Now, that may sound like a good chunk of change, and for the ordinary individual, it is, possibly enough that you decide not to buy today. Now, let's say, all other things being equal, that the company is offering 0.9% incentive financing. Same price, same down payment, same loan term. Your payments over 3 years decrease to $450.64, and over the same loan term you would only pay $222.97 in interest. You save over $2,093.67 in interest over three years, which for you is again a decent chunk of change. Theoretically, the car company's losing that same $2,093.67 in interest by offering this deal, and depending on how it's getting the money it lends you (most financial companies are middlemen, getting money from bond-buying investors who expect a rate of return), that could be a real loss and not just opportunity cost. But, that incentive got you to walk in their door, and not their competitor's. It helped convince you to buy the $20,000 car. The gross margin on that car (price minus direct costs) is typically 20% for the dealer, plus another 20% for the manufacturer, so by giving up the $2,000 on the financing side, the dealer and manufacturer just earned themselves 4 times that much. On top of that, by buying that car, you're committing to buy the parts for the car, a side business with even higher margins, of which the car company gets a pretty big chunk. You may even be required to use dealer service while the car's under warranty in order to keep the warranty valid, another cha-ching. When you get right down to it, the loss from the incentive financing is drowned in the gross profits they make from selling the car to you. Now, in reality, it's a fine balance. The percentages I mentioned are gross margins (EBITDASG&A - Earnings Before Interest, Taxes, Depreciation, Amortization, Sales, General and Administrative costs; basically, just revenue minus direct cost of goods sold). Add in all these side costs and you get a net margin of only about 3.5% of revenue, so your $20k car purchase may only make the car company's stakeholders $700 on the sale, plus slightly higher net margins on parts and service over the life of the car. Because incentive financing is typically only offered through the company's own financing subsidiary, the loss isn't in the form of a cost paid, but simply a revenue not realized, but it can still move a car company from net positive to net negative earnings if the program is too successful. This is why not everyone does it, and not all at the same time; if you're selling enough cars without it, why give away money?  Typically, these incentives are offered for two reasons; to clear out old cars or excess inventory, or to maintain ground against a competitor's stronger sales numbers. Keeping cars on a lot ready to sell is expensive, and so is not having your brand driving around on the street turning heads and imprinting their name on the minds of potential customers.