Buy tires and keep car for 12-36 months, or replace car now?
If the car is in otherwise good shape, it's always less expensive to keep it longer. Think of it this way: you have to buy new tires no matter what. It's just a question of whether or not those new tires are attached to a new car or your current car. I don't see how anyone could give you a hard-and-fast formula, unless they know where to get some applicable statistics. Because several factors here are not a straight calculation. If you don't replace the tires but keeping driving the car, what is the increased probability that you will get into an accident because of the bald tires? How much will bald tires vs new tires affect the selling price of the car? Presumably the longer you drive the car after getting new tires, the less increase this will give to the market value of the car. What's the formula for that? If you keep the car, what's the probability that it will have other maintenance problems? Etc. That said, it's almost always cheaper to keep your current car than to buy a new one. Even if you have maintenance problems, it would have to be a huge problem to cost more than buying a new car. Suppose you buy a $25,000 car with ... what's a typical new car loan these days? maybe 5 years at 5%? So your payments would be about $470 per month. If you compare spending $1000 for new tires versus paying $470 per month on a new car loan, the tires are cheaper within 3 months. The principle is the same if you buy with cash. To justify buying a new car you have to factor in the value of the pleasure you get from a new car, the peace of mind from having something more reliable, etc, mostly intangibles. I tend to agree with Rocky's answer.  However it sounds like you want to look at this from the numbers side of things.  So let's consider some numbers: I'm assuming you have the money to buy the new car available as cash in hand, and that if you don't buy the car, you'll invest it reasonably.  So if you buy the new car today, you're $17K out of pocket.  Let's look at some scenarios and compare.  Assuming: If you buy the new car today, then after 1 year you'll have: If you keep the old car, after 1 year you get: After 2 years, you have: And after 3 years, you're at: Or in other words, nothing depletes the value of your assets faster than buying the new car. After 1 year, you've essentially lost $5K to depreciation.    However, over the short term the immediate cost of the tires combined with the continued depreciation of the old car do reduce your purchasing power somewhat (you won't be able to muster $25K towards a new car without chipping in a bit of extra cash), and inflation will tend to drive the cost of the new car up as time goes on.  So the relative gap between the value of your assets and the cost of the new car tends to increase, though it stays well below the $5k that you lose to depreciation if you buy the new car immediately.  Which is something that you could potentially spin to support whichever side you prefer, I suppose. Though note that I've made some fairly pessimistic assumptions.  In particular, the current U.S. inflation rate is under 1%, and a new car may depreciate by as much as 25% in the first year while older cars may depreciate by less than the 8% assumed.  And I selected the cheapest new car price cited, and didn't credit the tires with adding any value to your old car.  Each of those aspects tends to make continuing to drive the older car a better option than buying the new one. 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... Would you buy this used car, in its current condition but with new tires, for the price of the tires? If so, buy the tires. New tires will increase the resale value of the car; while not by the full cost of the tires, it will not be entirely a sunk cost. You'd need to factor that in and find out how much the new tires increase the resale value of the car to determine how much they would truly cost you.  However, I suspect they would cost you less than a $25,000 car a year early would.  That new car would cost some amount over time - it sounds like you buy a new car every 8 years or so? So it would cost you $25/8 = $3.3k/year.  That would, then, be the overall cost of the new car a year early - $3.3k (as it would mean one less year out of your old car, so assuming it was also $25k/8 year or similar, that year becomes lost and thus a cost). There are a few factors I like to consider when I'm reasoning financially over my households cars. How many KMs will the car travel each year because I like to factor in how often tires will need to be changed, how much tires for my models cost as well as how gas efficient they are. Knowing how much the car is driven and in what environmental/road conditions is also important factors to know because that will help guestimate possible repairs cost. Also possible taxes should be taken in to consideration. For example a few years ago I had a diesel Citroen C5 that had yearly taxes of roughly 500$. The replacement costs only 150$ a year in taxes. So switching cars 3 years early would have saved me 1050$ in taxes. So some information on possible taxes, how far you drive each year, what environmental conditions, type of driving (daily long rides or just short etc..) as well as the fuel efficiency of both cars would help to better calculate your costs for say three scenarios. Car change in 12, 24 and 32 months respectively. If You use the car regulary, I don't think that driving on the bald tires for 3 years is a reasonable option. Have You considered buying used tires? Those will be cheaper and will last till You get to replace the car.
"A lease is a rental plain and simple.  You borrow money to finance the expected depreciation over the course of the lease term.  This arrangement will almost always cost more over time of your ""ownership.""  That does not mean that a lease is always a worse ""deal.""   Cars are almost always a losing proposition; save for the oddball Porsche or Ferrari that is too scarce relative to demand.  You accept ownership of a car and it starts to lose value.  New cars lose value faster than used cars.  Typically, if you were to purchase the car, then sell it after 3 years, the total cost over those three years will work out to less total money than the equivalent 36 month lease.  But, you will have to come up with a lot more money down, or a higher monthly payment, and/or sell the car after 36 months (assuming the pretty standard 36 month lease).  With this in mind, some cars lease better than others because the projected depreciation is more favorable than other brands or models.   Personally, I bought a slightly used car certified pre-owned with a agreeable factory warranty extension.  My next car I may lease.  Late model cars are getting so unbelievably expensive to maintain that more and more I feel like a long term rental has merit. Just understand that for the convenience, for the freeing up of your cash flow, for the unlikelihood of maintenance, to not bother with resale or trading the car in, a lease will cost a premium over a purchase over the same time frame." "Short answer: Absolutely not, unless you're comfortable with putting years of your labor into a depreciating asset that will incur hefty maintenance costs over its remaining life. i.e. consider your 10K gone forever once you buy the car, and then some. Some comments on your reasons: ""Keeping up with spoiled brats"" is a losing proposition, and is a mindset counterproductive to financial independence. I'd encourage you to find a way to not care about how the spoiled brats live their lives. It won't be easier when you're older and you see your peers driving fancy cars and living fantasy lifestyles that you are tempted to emulate. Break the impulse to ""keep up"" and you'll be in a much better place. A used BMW may not be a piece of junk at first, but once you hit 100K miles, everything will suddenly fall apart and need repair. Been there myself. Still have the car after 7 years, only because very few people want to buy a high-mileage German sport sedan with recurring maintenance issues. See #2. It will be a good drive for a while, then it will own you. This is not so bad when you have a decent amount of savings, but when you have nothing, it's very hard to truly enjoy the car while knowing that any problems not covered by warranty will be financially devastating. Are you prepared to ride the bus for 4 weeks while saving enough income from work to replace a bad clutch? I had to do this, and it's not something I brag about." You are really showing some wisdom here, and congratulations on finishing college.   Its a lot about likelihoods.  If you buy a new car, there is something like a 99.5% chance you will get a car that will not need repairs.  If you buy a car for $1200 there is probably a 20% chance that the car will only need minimal repairs.  So the answer is there is no real guarantee that spending any amount of money you will end up with a car with no repairs. You also can't assume that with buying a car it will immediately need repairs.  Its possible, that you could spend 1200 on a car and it will need an oil change.  In three months it might need brakes and in 6 months tires.  If that is the case, you could save up the money for repairs. Have you looked for a car?  It will take some work, but you might be able to find something in good condition for your budget.   If you shop for a loan, go with a good credit union or local bank.  Mostly you are looking for a low rate.  However, I would advise against it.  You worked so hard on getting out of school without debt, why start now?   Be weird and buy a car for cash.  Heck someone may be able to loan you a car for a short time while you save some money. Apparently, if you keep your tires' air filled to the recommended level, your car will burn less gas.   I loved this article at WikiHow, which confirmed what I had heard about air in tires, and had others to suggest, such as removing unnecessary items from inside and on your car (such as bike racks, trailer balls) as they can add to your car's overall weight, causing more drag and using more gas. Car clubs are designed for your use case.  They (are supposed to) feature (some or all of) local 24 hour availability; hourly rates for things like big shopping trips; whole-weekend use; insurance isn't your problem. If one is available in your area it's well worth a look.  You may find that for longer trips a conventional hire is cheaper, but membership fees can be low (another variable between schemes is the tradeoff between the membership fee and the per-use fees). "A lease is a rental plain and simple.  You borrow money to finance the expected depreciation over the course of the lease term.  This arrangement will almost always cost more over time of your ""ownership.""  That does not mean that a lease is always a worse ""deal.""   Cars are almost always a losing proposition; save for the oddball Porsche or Ferrari that is too scarce relative to demand.  You accept ownership of a car and it starts to lose value.  New cars lose value faster than used cars.  Typically, if you were to purchase the car, then sell it after 3 years, the total cost over those three years will work out to less total money than the equivalent 36 month lease.  But, you will have to come up with a lot more money down, or a higher monthly payment, and/or sell the car after 36 months (assuming the pretty standard 36 month lease).  With this in mind, some cars lease better than others because the projected depreciation is more favorable than other brands or models.   Personally, I bought a slightly used car certified pre-owned with a agreeable factory warranty extension.  My next car I may lease.  Late model cars are getting so unbelievably expensive to maintain that more and more I feel like a long term rental has merit. Just understand that for the convenience, for the freeing up of your cash flow, for the unlikelihood of maintenance, to not bother with resale or trading the car in, a lease will cost a premium over a purchase over the same time frame." "You are co-signer on his car loan. You have no ownership (unless the car is titled in both names).  One option (not the best, see below) is to buy the car from him.  Arrange your own financing (take over his loan or get a loan of your own to pay him for the car).  The bank(s) will help you take care of getting the title into your name.  And the bank holding the note will hold the title as well. Best advice is to get with him, sell the car. Take any money left after paying off the loan and use it to buy (cash purchase, not finance) a reliable, efficient, used car -- if you truly need a car at all. If you can get to work by walking, bicycling or public transit, you can save thousands per year, and perhaps use that money to start you down the road to ""financial independence"".  Take a couple of hours and research this.  In the US, we tend to view cars as necessary, but this is not always true.  (Actually, it's true less than half the time.) Even if you cannot, or choose not to, live within bicycle distance of work, you can still reduce your commuting cost by not financing, and by driving a fuel efficient vehicle.  Ask yourself, ""Would you give up your expensive vehicle if it meant retiring years earlier?""  Maybe as many as ten years earlier." "Now, to buy in full (and essentially have zero savings), buy in part (£10000 deposit, followed by a loan of £4000) or PCP/HP more of the value? So, you are assessing if the car is worth having with either none or only 4,000 in savings. This is the most critical information you have provided.   My outright opinion is to always buy a mildly used car as I hate the idea of loans and interest. With the amount of money that you currently possess, I believe the ""Buy-in-part"" option is best as it reduces your interest liability; but, I don't believe you should do it currently. 4,000 is a rather small cash fund for if something were to go boom in the night.   As for your question of interest: This is completely dependent on the amount you are able to pay per period and the total interest you are willing to spend, rows four and seven respectively. This is your money, and no one can tell you what's best to do with it than yourself. Keep looking for good leasing deals or if you think you can survive financial strife with 4,000 then follow your heart. ""Depreciation"" fluctuates to the buyer, so never assume what the car may lose in the next 2-3 years. Hope it all goes well my friend."