Car Loan Calculator

Car Loan Calculator: Payments, Total Cost and Refinancing

Use this vehicle loan calculator to determine a realistic budget before you shop, not just a payment number to respond to at the dealership. That’s why so many car loan calculator programs only ever give you one number and then leave you to fend for yourself when the negotiation actually begins. This vehicle car loan calculator page discusses the 3 points where the numbers really determine what you pay: choosing your budget before you walk into a dealership, defending that budget when you are in the finance office, and later deciding whether refinancing an existing loan is worth it. At each step we will walk through one genuine example so you can understand how each decision plays into total cost and not just the monthly number.

Stage 1: Before You Shop, Setting a Real Budget

To calculate a car loan, use a car loan calculator. You use the typical calculation for an amortizing loan:

M = P x r(1 + r)m [(1 + r)m – 1]

If P is the amount borrowed (car price, less your down payment and any trade-in equity), r is the monthly interest rate, and m is the number of monthly installments.

We’ll use a single example for the entire page: a $32,000 automobile, with $4,000 down, financing the remaining $28,000 over 60 months at 7.5%.

Monthly rate = 7.5% / 12 = 0.00625

M = $28,000 * [0.00625 * (1.00625)60] / [(1.00625)60 – 1] ≈ $561 per month

Total paid over 60 months: $33,660 Total interest paid: $5,660

Before you ever step foot on a dealer lot, here’s some advice to follow: 1. Get preapproved for a car loan at your own bank or credit union. If you go in with a rate you’ve already locked in, you’re comparing the dealer’s offer to a hard number, and you may walk away if theirs isn’t as good, instead of a car payment calculator taking whatever rate they provide as your only option.

The Term-Length Trade-Off

The length of the loan is the most important factor in both your monthly payment and the total cost. Let’s look at the same $28,000 loan with four different terms:

At $429 a month, an 84-month term seems like the best deal. The interest on the same loan is also $3,580 more than on the 48-month term. Another, less obvious cost is that cars lose value while you’re paying them off, and if you have a longer loan term, you’ll be owing more than the car is worth for more months. There is no such thing as a cheaper loan that is spread out over a longer period of time.

Stage 2: At the Dealer, Why ‘What Monthly Payment Do You Want? ‘Costs You Money

People who are looking to buy a car often make the costly mistake of negotiating based on their desired monthly payment instead of the car loan calculator.

Here is a clear explanation of the process. There are several ways for a finance manager to reach your goal of $480 a month, and not all of them will cost you the same amount. The price can go down. The term can be shortened, the price can go up, or new products can be added, but your monthly payment will stay the same on a car loan calculator refinance.

Here’s an example using our vehicle as an example. It costs almost the same each month to pay for both of these deals:

Deal A (talks about price): $28,000 borrowed, paid back over 72 months at 7.5% APR, or $484 a month, for a total of $34,855.

Offer B (dealer-structured): $30,000 financed (extra items added), 84 months, 8.9% APR (a higher rate set by the owner) = $481 per month, or $40,412 paid back in total

When you sign, both deals seem the same because the monthly payment is pretty much the same. Deal B will cost you $5,557 more over time. If you only look at the monthly number, you can’t see that gap.

The simple fix is to talk about the out-the-door price first, as a separate conversation, before you talk about financing. Once the price is agreed upon, talk about financing on its own terms, preferably at the rate you already got approved for in Stage 1.

Add-Ons Rolled Into the Loan

Products such as GAP insurance, extended warranties, paint protection, etc., are often “sold” in the finance office and are usually added to the loan amount instead of being paid for individually. Which means they don’t simply cost their sticker price; they rack up interest throughout the life of the rest of the loan, just like the car.

Now, add $2,500 of these items to our example loan, raising the financed amount to $30,500 from $28,000, still at 7.5% over 60 months.

New monthly payment: $561, going up to $611 New total paid off: $36,672 (was $33,660)

Note that the $2,500 in add-ons actually adds up to $3,006 after financing is included, which is almost $500 more than the sticker price of the devices itself. That’s not to say that these items are never worth your time; some of them are actually valuable depending on your scenario. But the real cost is the funded cost, not the sticker price, and that’s the number that dealer calculators rarely display.

Stage 3: Car Loan Refinance Calculator

There are a few particular scenarios where refinancing your existing car loan calculator might be a good idea: if your credit score has actually improved since you got the loan, if market interest rates have gone down or if you originally took out the loan through the dealership at a marked-up rate you didn’t shop around to undercut.

Let’s take our example loan being refinanced and walk through it. After 18 months of payments on the original $28,000 loan at 7.5%, the amount is about $20,668, and there are 42 months remaining on the original period.

Let’s say you refinance that remaining loan at a lower 5.9% rate but preserve the same 42-month payoff timetable instead of stretching it out.

New monthly payment: $546 from $561, a monthly saving of $15. Original loan remaining amount: $561 x 42 = $23,562; $546 x 42 = $22,932 Total remaining on refinanced loan Pre-Fee Raw Savings: $630

If the refinance costs a $300 fee, your break-even point is the fee divided by the monthly savings: $300 ÷ $15 ≈ 20 months. The loan is still 42 months away from being paid off, so refinancing clears its break-even point and has time left over, netting about $330 in savings over the balance of the term.

One big warning: If a refinance offer pushes your term back out, instead of preserving your original payoff schedule, the monthly payment can fall while the overall price increases, the very same trap outlined in Stage 2. When comparing always look at the new total cost against the remaining total of your loan, and not just the new monthly payment against the old. Watch if the lower payment is coming from a better rate or just a longer term.

Car Loan Calculator UK: PCP and Hire Purchase

If you are in the UK then a typical auto loan calculator that uses the US type of amortization will not give an accurate model for most vehicle finance arrangements, as most UK car finance is not set up like this.

The most popular type of auto finance in the UK is a personal contract purchase (PCP). Because PCP monthly payments are based on the estimated depreciation of the car over the term of the agreement, rather than the entire purchase price, PCP monthly payments are generally lower than an equivalent loan. At the end of the agreement, you are offered an optional final payment known as a balloon payment to truly buy the automobile, or you hand it back.

Hire Purchase (HP) is similar to a regular loan as your payments go towards the full purchase price of the vehicle, which is paid off throughout the period, and ownership passes to you automatically after the final payment is made.

A typical amortization formula does not accurately represent PCP because it is not financing the whole car price; it is financing the depreciation gap. When comparing PCP deals, don’t bother with a monthly payment amortization calculation and only focus on three numbers: the total amount payable during the entire agreement, the size of the optional final payment, and the mileage limitations, as exceeding these usually costs more. APR is a legislated disclosure requirement on UK vehicle finance agreements; thus, it always has to be stated, which makes it a really handy figure when you’re comparing offers side by side.

Car Loan Calculator Australia: Comparison Rate and Balloons

Australian vehicle finance has two aspects that don’t directly translate to a US-style calculator.

First, Australian lenders have to show a comparative rate alongside the main interest rate. The comparison rate takes most of the fees and charges and rolls them into one annualised number, so it’s a much more useful number to use when you’re comparing two different loan offers than the headline rate on its own. That’s because a lower headline rate with high fees could actually end up costing you more than a higher headline rate with few fees.

Secondly, auto finance in Australia sometimes comes with a balloon payment. It’s similar to a PCP balloon. Over here in the UK, you’ll pay lower monthly payments during the length of the loan, but you’ll repay a hefty lump sum at the end. It can make a vehicle feel more reasonable on a month-to-month basis, but it implies a major percentage of the vehicle’s cost is deferred rather than paid off, which is worth thinking about carefully before committing to that plan.

Leasing and Classic Cars: Different Calculations

Two related cases employ math truly different from all above.

Financing a car is not the same calculation as leasing a car on car lease calculator. The lease payment is based on the estimated depreciation of the car throughout the lease term, plus a finance fee. Not the amortization formula used elsewhere on this page. The statistics above don’t simply translate to a lease vs purchase comparison, but a car leasing calculator developed for that structure will show you the real comparison.

Classic and collectable cars are a different story. Usually, these are funded by speciality lenders, not your regular auto lender. The appraisal requirements, term structures and sometimes even the underwriting are different. A classic car loan calculator can hold its value, or even appreciate, instead of depreciating like a typical vehicle. Expect the conditions and qualification process to be considerably different than what’s detailed in this site if you are looking for a historic vehicle loan calculator.

You might also be offered manufacturer-branded credit deals, such as promotional rates through a car brand’s own finance arm. In fact, sometimes these may really outperform the rates of banks or credit unions, especially on new cars during promotional periods, so it’s worth evaluating them side by side against your preapproved rate, rather than assuming one is inevitably better than the other.

Conclusion

Every car loan calculator will show you the monthly payment, but that’s rarely what decides what you actually spend throughout the life of a car loan. Term length, rate, add-ons, and how financing is handled all change the overall cost independently of the payment amount, frequently in ways that stay concealed up until you’re looking at the payoff statement years later. Set your budget on the overall cost before you shop. Negotiate price and financing separately. Run the figures again before thinking a refinance offer is automatically a good deal, as the monthly savings alone rarely tell the whole picture.

FAQs

Q1. How do I calculate my car payment?

The formula used is M = P × [r(1+r)ᵐ] ÷ [(1+r)ᵐ − 1], where P is the amount funded, r is the monthly interest rate and m the number of months. For $28,000 borrowed at 7.5% over 60 months, that’s around $561 a month.

Q2. Is a 72 or 84-month car loan a bad idea?

Not automatically, but it costs extra. Our research shows that an 84-month term costs $3,580 more in interest than a 48-month term on the same loan and prolongs the period when you probably owe more on the automobile than it’s worth. When you think about a longer term, consider the true costs versus the lower payment.

Q3. Should I negotiate the price or the monthly payment?

The cost. In our two-deal example, the monthly payments were virtually comparable, but the total cost was $5,557 different because the term and rate were modified behind the scenes to reach the target monthly payment. Arrange the out-the-door pricing in a different conversation, and then arrange financing in a separate conversation.

Q4. When is refinancing a car loan worth it?

When your new rate is actually lower and you’re not extending the original pay-off time. In our example, the net savings after fees by refinancing after 18 months are around $330 over the remaining mortgage period, with a break-even of about 20 months against 42 months remaining. Don’t only look at the new monthly payment but also the new total cost.

Q5. How is UK car finance different from a US car loan?

The vast majority of automobile finance in the UK is either PCP, where you make payments that cover the depreciation and then have the option of paying a final lump sum to own the car, or hire purchase, where you make payments that cover the whole price and then automatically become the owner at the end. Also, neither functions as a US amortizing loan.

Q6. What is a comparison rate in Australia?

It is a rate disclosure that incorporates most fees and charges into one annualized amount that Australian lenders must present alongside the headline rate. However, it is more beneficial than the headline rate alone for making a fair comparison of two different loan offers.