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Car Affordability Calculator

Car Affordability Calculator turns a monthly vehicle budget and running costs into a result you can check against the figures from your car, route or workshop note.

Calculate your result

Enter your figures below. Values stay in your browser.

How to use Car Affordability Calculator

  1. Enter your figures in the units shown beside each field. Keep monetary inputs in the same currency; money results are currently displayed in USD.
  2. Select the unit standard where the form offers a choice, then choose Calculate.
  3. Read the breakdown and compare the worked example below. Change one assumption to see its effect.

Formula used

Affordable principal = payment × (1 − (1+r)^(-months)) ÷ r. At zero interest use payment × months. Estimated price = (principal + down payment) ÷ (1 + tax/100).

Worked example

At 0% interest, 400 per month for 36 months supports 14,400 of principal. With a 3,000 deposit and no tax, the estimated vehicle price is 17,400.

What the result means

The monthly input is the amount available for the loan after running costs. Fees and insurance are not included in this price estimate.

Check your result

Results retain calculation precision internally and round for display. Keep the input values with the result so you can reproduce it. Use Reset to restore the example inputs, or Copy result to copy the displayed answer.

If the result does not agree with your own calculation, report the page, inputs and expected answer. See our methodology and reference sources for the standards used.

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Formula, worked example and limitations updated September 10, 2026.

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