Car Interest Cost
See how much interest a car loan really costs before it's paid off.
About Car Interest Cost
A standard amortizing loan payment is computed from the principal and rate, and interest is what is left after repaying principal. Financing terms shift the total by thousands, so comparing interest cost across lenders reveals the true price of convenience.
Formula
Car Interest Cost
Payment = P x r / (1 - (1 + r)^-n); interest = payment x n - P
- P
- Principal loan amount
- r
- Monthly interest rate
Worked example
With the default values below, Car Interest Cost returns Monthly Payment of $471.78. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Loan amountminimum 0
- 25,000
- Interest rateaccepts 0–25 %
- 5 %
- Loan termminimum 1
- 60
Results
- Monthly Payment
- $471.78
- Total Interest
- $3,307
- Total Paid
- $28,307
Step by step
- 1Values used
- 2Car Interest Cost
- 3Monthly Payment= 471.78
- 4Total Interest= 3,307
- 5Total Paid= 28,307
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Car Interest Cost calculated?
Payment = P x r / (1 - (1 + r)^-n); interest = payment x n - P A standard amortizing loan payment is computed from the principal and rate, and interest is what is left after repaying principal.
Why does Car Interest Cost matter?
Financing terms shift the total by thousands, so comparing interest cost across lenders reveals the true price of convenience.
What values do I need to enter?
This calculator takes 3 inputs: Loan amount, Interest rate, Loan term. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.