The buy-versus-lease question is one of the most confusing in personal finance, and not by accident. Leasing is sold on the monthly payment, which is almost always lower than a loan payment on the same car, and that single number does a lot of work to make leasing feel like the smart, affordable choice. The trouble is that the monthly payment is the wrong thing to compare. Once you look at total cost over the same period, and account for what you actually own at the end, the picture often changes.
Here is how to compare them honestly, what the lease jargon really means, and the one cost that no monthly payment will ever show you.
Compare over the same time, and count what you own
The mistake almost every comparison makes is stopping at the monthly payment. A lease payment is lower because you are only paying for the part of the car you use up over a few years, not the whole car. So of course it is cheaper per month. That tells you nothing about which is the better deal.
The fair comparison is total cost over the same horizon, usually the lease term, with one crucial adjustment: when you buy, you own the car, so at the end you could sell it and recover its value minus any loan you still owe. That recovered equity is real money that offsets what you paid. A lease leaves you with nothing at the end except the option to start another lease.
So the rule is: add up everything each option costs over the same period, then credit the buy side for its resale equity. The buy vs lease calculator does exactly this.
Decode the lease: what a money factor really is
Leases hide their interest rate behind a term designed to be confusing: the money factor. It looks like 0.00208, a number small enough to seem irrelevant. It is not. To turn it into an APR you can actually compare to a loan, multiply by 2400.
Money factor x 2400 = APR
A money factor of 0.00208 is about a 5 percent APR. One of 0.00417 is about 10 percent. Dealers quote the money factor precisely because the small decimal looks harmless, so always convert it. If a dealer will not tell you the money factor, that itself is a warning sign.
The rest of the lease is two ideas. The residual value is what the leasing company predicts the car will be worth at the end, and you pay for the difference between the price and that residual, the depreciation. The money factor is then applied as the finance charge. A lease payment is just those two pieces: a depreciation fee plus a finance fee.
A worked comparison
Take a $35,000 car over 36 months. Buying: $3,000 down, a 6 percent loan over 60 months, and the car depreciates about 15 percent a year. Leasing: $2,000 down, a $21,000 residual, a 0.00125 money factor (about 3 percent APR), and a $350 disposition fee.
| Buy | Lease | |
|---|---|---|
| Monthly payment | about $619 | about $401 |
| Cash paid over 36 months | about $25,271 | about $14,780 |
| Value at the end | about $7,536 equity | nothing |
| Net cost | about $17,736 | about $16,780 |
Notice what happens. The lease has the lower payment by more than $200 a month, and far less cash out of pocket over the three years. But once you credit the buyer for the roughly $7,500 of equity in a car they now own outright debt aside, the net costs are close, with the lease ahead by under $1,000. Change the assumptions, a slower depreciation rate, a higher residual, a longer time owning the car, and the result flips to favor buying. This is why you have to run your own numbers rather than trust the payment.
The cost the comparison cannot show
Even a fair dollar-for-dollar comparison over one lease term misses the biggest long-run difference, because it only looks at one term.
Leasing is a permanent payment
When a lease ends, you have nothing, so you lease again, and the payment never stops. When a loan ends, you own the car and can drive it for years with no payment at all. Over a long horizon, those payment-free years after a loan is paid off are where buying pulls clearly ahead. A single 36-month comparison cannot capture that, but it is often the deciding factor.
This is the heart of it. Perpetual leasing means a perpetual car payment, by design. Someone who buys a reliable car and keeps it for ten years spends far less per year than someone who leases a new car every three years for the same decade, even when each individual lease looked competitive.
When leasing still makes sense
Leasing is not a trap for everyone. It can be a reasonable choice if you genuinely value driving a newer car that is always under warranty, you want the lower payment and predictable costs, you stay within the mileage limit, and you accept that you will always have a payment. It can also make sense for a business that deducts the expense.
What you should not do is choose a lease because the monthly payment is lower, without comparing total cost. And watch the extras a low payment hides: the acquisition fee to start, the disposition fee to return the car, charges for excess miles and wear, and steep penalties for ending early.
The honest bottom line
Compare total cost over the same period, convert the money factor to an APR so you can see the real rate, and credit buying for the equity you keep. Run your specific deal through the buy vs lease calculator, and if you are buying, the auto loan calculator shows the loan cost while the car affordability calculator checks it against your budget. For most people who keep their cars, buying wins over time, but the only way to know for your numbers is to compare them honestly, which is more than the monthly payment will ever tell you.