How to Calculate Car Payments (Made Simple!)

🚗 Thinking about buying a car? Whether it’s brand new or gently used, knowing your monthly car payment is key to staying on budget. Luckily, calculating it is easier than you think — and we’re here to help! 😊

Let’s walk through it step-by-step.

💡 What Goes Into a Car Payment?

Your monthly car payment depends on a few key things:

  • Loan amount (principal) – the price of the car minus your down payment and trade-in
  • Loan term – how many months you’ll take to repay it
  • Interest rate – how much extra you pay to borrow the money
  • Sales tax and fees – sometimes included in the loan total

🧮 Car Payment Formula

Here’s the standard formula for calculating car payments:

Car Payment = [P × r × (1 + r)ⁿ] ÷ [(1 + r)ⁿ – 1]

Where:

  • P = Loan amount
  • r = Monthly interest rate (annual rate ÷ 12 ÷ 100)
  • n = Loan term in months

Don’t worry — we’ll break this down with an example!

✅ Example

Let’s say:

  • Car price: $25,000
  • Down payment: $5,000
  • Loan amount: $20,000
  • Interest rate: 6% annually
  • Loan term: 60 months (5 years)

Step 1: Convert the interest rate to monthly

6% ÷ 12 ÷ 100 = 0.005 (monthly rate)

Step 2: Plug into the formula

Payment = [20000 × 0.005 × (1 + 0.005)⁶⁰] ÷ [(1 + 0.005)⁶⁰ – 1]

That comes out to about $387 per month

⚙️ Car Loan Payments Calculator

Enter

  • Loan amount (principal)
  • Loan term
  • Interest rate
  • Sales tax and fees

The tool will calculate monthly car payments

🚨 Don’t Forget These!

  • Sales tax may be added to your loan
  • Car insurance is not included in this payment
  • Fees or add-ons like warranties can raise your loan total

💰 Bonus Tip: Lower Your Payment

Want to reduce your monthly payment? You can:

  • Make a bigger down payment
  • Get a lower interest rate
  • Choose a longer loan term (but you’ll pay more in interest!)