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Car finance calculator

Monthly payments, the total cost and the APR of a car loan or hire purchase agreement.

Car finance calculator

The cash price on the order form.

£

What you pay up front, part-exchange included. Leave blank if none.

£

For example 48 for 4 years, up to 120.

Rate on the quote

The APR includes compulsory fees. A nominal rate counts interest only. A flat rate charges interest on the whole amount for the whole term.

As a percentage, for example 9.9.

%

Monthly payment

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Enter the price, the term and the rate to see the monthly payment.

Amount borrowed
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Number of monthly payments
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Interest
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Fees
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Total charge for credit
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APR
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Nominal rate (monthly rate × 12)
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Total amount payable, deposit included
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Recent calculations

Nothing yet: copy, export or save a calculation to find it here.

How it works

Enter the price of the car, your deposit, the term and the rate on the quote. You get the monthly payment, the total charge for credit, the total amount payable and the APR, with every step of the working. For hire purchase it also shows half the total amount payable: the point at which the law lets you hand the car back.

Start from the price and the deposit

The amount borrowed is the price of the car less your deposit, part-exchange included. With a personal loan the car is yours from the start. With hire purchase (HP) the car is hired to you, and it only becomes yours once you have kept to the agreement, usually by paying the final payment or an option-to-purchase fee.

Choose the rate on the quote

The APR (annual percentage rate) counts the interest and the compulsory fees: it is the figure to compare between quotes. With an APR, the calculator assumes the whole cost is in the monthly payments, with no separate fee: if there are fees, the real payments are a little lower. A nominal rate counts interest only, so add any arrangement, documentation or option-to-purchase fee and the calculator works out the APR, counting the fees as paid at the start. A quote may also give a flat rate, with interest charged on the whole amount for the whole term; the calculator shows the APR that comes to.

Hire purchase: the half-way point

Under the Consumer Credit Act 1974 you can end a hire purchase or conditional sale agreement at any time before the final payment falls due. You then owe whatever brings your payments up to half the total amount payable, deposit and fees included, unless the agreement asks for less, plus the cost of any damage beyond reasonable care. This rule applies across the UK. It does not apply to a personal loan.

Rounding

Monthly payments are rounded to the nearest penny, with halves rounded up. The final payment clears the loan exactly, so it can differ from the others by a few pence. Copy the result, export it as a CSV file or save it to Priostack.

Amount borrowed: C = price − deposit.

With a nominal rate N, the monthly rate is i = N ÷ 12; with an APR A, i = (1 + A)^(1/12) − 1.

Monthly payment = C × i ÷ (1 − (1 + i)^−n), where n is the number of payments.

With a flat rate F: interest = C × F × n ÷ 12, and the monthly payment = (C + interest) ÷ n.

APR: the yearly rate X at which C − fees equals the sum of the payments, each multiplied by (1 + X)^(−k/12) for month k.

Example: £10,000 over four years at a 4.9% flat rate

A dealer quotes hire purchase on £10,000 at 4.9% flat over 48 months. The interest is £10,000.00 × 4.9% × 4 = £1,960.00, so you repay £11,960.00: 47 payments of £249.17 and a final one of £249.01. That is an APR of 9.45%, nearly twice the flat rate. Half the total amount payable is £5,980.00.

Frequently asked questions

What is the difference between an APR and a flat rate?

A flat rate charges interest on the whole amount borrowed for the whole term, even though you repay some of it every month. The APR measures the cost on what you still owe, fees included, so the same deal always shows a higher APR than flat rate: 4.9% flat over four years is an APR of 9.45%. Compare quotes on the APR.

Can I hand the car back before the end of a hire purchase agreement?

Yes. Under sections 99 and 100 of the Consumer Credit Act 1974 you can end a regulated hire purchase or conditional sale agreement at any time before the final payment falls due. If you have paid less than half the total amount payable, you owe the difference, unless the agreement asks for less; if you have not taken reasonable care of the car, you can owe more.

Can I cancel car finance after signing?

If the credit is £60,260 or less, you can withdraw from a regulated consumer credit agreement without giving a reason within 14 days, counted from the day after the agreement is made or, if later, the day you receive your copy (section 66A of the Consumer Credit Act 1974). You then repay the credit, with the interest for the days you had it, within 30 days; under hire purchase the car then becomes yours.

Does this work for PCP?

Not in full. A PCP deal ends with a large optional final payment, which this calculator does not model. When a PCP agreement is written as hire purchase, the half-way rule still applies, and the total amount payable then includes that final payment, because the law counts any sum paid to exercise an option to purchase.

Why is my payment a few pence different from the quote?

The calculator rounds the monthly payment to the nearest penny and adjusts the final payment so that the loan is cleared exactly. A lender that rounds differently, for example each month's interest, can end up a few pence apart. The figures in your credit agreement are the ones that count.

Sources

  1. legislation.gov.uk: Consumer Credit Act 1974, section 99 (right to terminate hire purchase) (30 September 2026)
  2. legislation.gov.uk: Consumer Credit Act 1974, section 100 (liability on termination: one-half of the total price) (30 September 2026)
  3. legislation.gov.uk: Consumer Credit Act 1974, section 66A (withdrawal within 14 days) (30 September 2026)
  4. legislation.gov.uk: Consumer Credit Act 1974, section 189 (hire-purchase agreement, total price) (30 September 2026)
  5. legislation.gov.uk: Directive 2008/48/EC, Annex I (APR formula) (31 December 2020)
  6. legislation.gov.uk: Consumer Credit (Total Charge for Credit) Regulations 2010, Schedule (APR equation, 12 equal months, at least one decimal place); the FCA Handbook, CONC App 1.2, now holds these rules (28 March 2010)

This calculator gives general information, not legal, tax, financial or accounting advice. The figures in the lender's quote and credit agreement are the ones that count: check the payment, the APR and the fees they state.

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