Direct Answer
A car loan amortization schedule shows how each auto loan payment splits between principal and interest over the life of the loan. On a $30,000 loan at 7% annual percentage rate (APR) over 60 months, the payment is $594/month, but only $419 goes to principal in month 1 while $175 goes to interest. By month 60, nearly the entire payment hits principal.
Use the Auto Loan Amortization Calculator to build a full payment table, chart, and schedule with your loan amount, rate, and term — plus optional extra payments.
Last verified on: June 28, 2026
Editorial note: This guide explains standard fixed-rate auto loan amortization. It does not include sales tax, registration, dealer fees, or variable-rate adjustments. Always confirm your lender’s prepayment terms before making extra payments.
Research method: Daily Calcs modeled a $30,000 auto loan at 7% APR over 60 months using the standard fixed-payment amortization formula. Extra payment scenarios apply additional monthly principal after the scheduled payment. Re-verified June 28, 2026.
Sample Car Loan Amortization Table: $30,000 at 7%
| Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $594 | $419 | $175 | $29,581 |
| 12 | $594 | $445 | $149 | $24,742 |
| 24 | $594 | $476 | $118 | $19,218 |
| 36 | $594 | $510 | $84 | $13,248 |
| 48 | $594 | $547 | $47 | $6,764 |
| 60 | $594 | $588 | $6 | $0 |
Total interest over 60 months: $5,642 on a $30,000 loan.
The pattern mirrors mortgage amortization: interest-heavy early payments, principal-heavy late payments. The difference is the shorter term — you reach the crossover point (where principal exceeds interest) much faster on a 5-year auto loan than a 30-year mortgage.
How Extra Payments Change the Schedule
| Strategy | Monthly Payment | Payoff Time | Total Interest | Interest Saved |
|---|---|---|---|---|
| Standard (no extra) | $594 | 60 months | $5,642 | $0 |
| + $50/month extra | $644 | 51 months | $4,912 | $730 |
| + $100/month extra | $694 | 46 months | $4,712 | $930 |
| + $200/month extra | $794 | 38 months | $4,198 | $1,444 |
Extra payments applied to principal only — never to future scheduled payments — produce the largest savings. Even $50/month cuts roughly 9 months and saves $730 in interest on this example.
Worked Example: Month-by-Month Payoff Path
Here is how the $30,000 at 7% over 60 months schedule actually behaves in the first year and at key crossover points — useful when reading your lender’s payment table or building one in Excel.
Setup: Monthly rate = 7% ÷ 12 = 0.5833%. Payment = $594.04. Month-1 interest = $30,000 × 0.005833 = $175.00. Month-1 principal = $594.04 − $175 = $419.04. New balance = $29,581.
Month 6: Balance has fallen to about $27,500. Interest = $27,500 × 0.005833 ≈ $160. Principal ≈ $434. You have paid roughly $1,050 in interest and $2,500 in principal in six months — about 70% of early payments still go to interest, but principal is climbing.
Month 12 (end of year 1): Balance $24,742. Cumulative interest paid ≈ $1,900; cumulative principal ≈ $5,258. You are 17% through the term but have only reduced the balance by 17.5% — typical for amortized loans.
Month 36 crossover: Interest portion drops below $85/month; principal exceeds $510. Extra payments made before this point save the most because they reduce interest on the highest balances.
Month 60: Final payment: $588 principal + $6 interest = $594. Total interest over life of loan: $5,642 (18.8% of amount borrowed).
To reproduce this in the Auto Loan Amortization Calculator, enter $30,000, 7%, 60 months, then scroll to months 1, 6, 12, 36, and 60 to verify each row matches the math above.
Car Loan vs Mortgage Amortization
| Auto Loan ($30k) | Mortgage ($300k) | |
|---|---|---|
| Typical term | 60 months | 360 months |
| Example rate | 7.0% | 6.5% |
| Monthly P&I | $594 | $1,896 |
| Total interest | $5,642 | $382,560 |
| Crossover (principal > interest) | Month 1 (short term) | ~Month 216 |
Auto loans feel expensive per month relative to the loan size because rates run higher and terms are shorter. But total interest on a car loan is a fraction of a mortgage because the balance and term are much smaller.
Calculator Methodology
The auto loan payment uses:
M = P * r(1 + r)^n / ((1 + r)^n - 1)- P = loan principal ($30,000)
- r = APR / 12 (7% → 0.005833)
- n = number of payments (60)
Each month’s interest = remaining balance * r. Principal = M - interest. Extra payments reduce balance before the next month’s interest calculation.
Assumptions and limitations: Fixed 7% APR, 60-month term, no sales tax or fees in the financed amount. Dealer add-ons and gap insurance are excluded. Variable-rate or balloon loans use different schedules. Confirm prepayment terms with your lender.
How to Read Your Amortization Chart
Most auto loan calculators display a principal vs interest chart over time. On this 60-month loan, interest drops below $100/month around month 36 and below $50/month around month 48. That is why extra payments in the first 24 months save the most interest — the balance is highest when the interest portion is largest.
Auto Loan Payoff Checklist
- Confirm extras apply to principal, not next month’s payment
- Compare dealer financing APR vs credit union quote
- Add sales tax and fees to total cost of ownership, not just the payment
- Model +$50 and +$100 extras in the Auto Loan Amortization Calculator
- Check for prepayment penalties (uncommon but possible on subprime loans)
Related Reading
- Amortization Formula — Payment Calculation Guide — the math behind every amortization schedule
- Extra Payments Amortization Schedule — how additional principal changes any loan schedule
- How to Read an Amortization Schedule — column-by-column guide for any loan type
Official and Supporting Sources
- Consumer Financial Protection Bureau (CFPB): What is a loan estimate?
- CFPB: How do I compare auto loan offers?
- Daily Calcs Auto Loan Amortization Calculator
Next Step
Enter your loan amount, APR, and term in the Auto Loan Amortization Calculator to generate your full payment table and see how extra payments change your payoff date.
Frequently Asked Questions
What is a car loan amortization schedule?
A car loan amortization schedule is a payment table showing each monthly installment split between principal and interest, plus the remaining loan balance after every payment. On a typical 60-month auto loan, early payments are mostly interest because the balance is highest. As the balance falls, more of each payment goes to principal. The schedule helps you see exactly how much the loan costs over time and how extra payments accelerate payoff.
How is an auto loan amortization schedule calculated?
Auto loans use the same fixed-payment amortization formula as mortgages: M = P * r(1+r)^n / ((1+r)^n - 1). For a $30,000 loan at 7% APR over 60 months, the monthly payment is $594.04. Each month, interest equals the remaining balance times the monthly rate (7%/12), and principal equals the payment minus that interest. The Auto Loan Amortization Calculator runs this math automatically and generates the full table.
Can I make extra payments on a car loan amortization schedule?
Yes. Extra principal payments reduce the remaining balance, which lowers future interest charges and can shorten the loan term. On a $30,000 loan at 7% over 60 months, adding $100/month in extra principal pays the loan off about 14 months early and saves roughly $900 in interest. Check your lender's prepayment policy — most auto loans allow extra principal without penalty, but confirm before paying ahead.
Car loan amortization vs mortgage amortization: What is different?
The math is identical — both use the standard amortization formula. The differences are practical: auto loans have shorter terms (36 to 84 months vs 360 for mortgages), higher rates on average, and no escrow for taxes or insurance. A $30,000 car loan at 7% costs $35,642 total over 60 months, while a $30,000 mortgage slice at 6.5% over 30 years costs far more in total interest because of the longer term.
What columns should a car loan amortization table include?
A useful auto loan amortization table includes payment number, payment date, total payment amount, principal portion, interest portion, and remaining balance. Some tables also show cumulative interest paid and cumulative principal paid. The Auto Loan Amortization Calculator generates all of these columns and lets you export the schedule for budgeting or comparison.
Does a car loan amortization calculator include taxes and fees?
The basic amortization schedule covers principal and interest only. Sales tax, registration fees, dealer documentation charges, and gap insurance are separate upfront or recurring costs not included in the standard payment table. When comparing dealer financing offers, add those fees to your total cost of ownership rather than relying on the monthly payment alone.
Related guides
- Amortization Schedule Example - Table Guide (2026) Read an amortization schedule step by step. See principal vs interest each month, build a payment table, and find how extra payments shorten your loan. Free.
- 30-Year Amortization Schedule - Example (2026) See a full 30-year amortization schedule example with principal vs interest splits. Compare 30- vs 15-year costs and how extra payments save interest. Free.
- Amortization Formula - Payment Calculation (2026) Calculate loan payments with the amortization formula. See how rate changes and extra payments save thousands on interest. Free step-by-step examples.
- Extra Payments Amortization Schedule (2026) See how extra principal payments change your amortization schedule. A small monthly addition can cut years off your loan and save thousands in interest. Free.
- What Is Amortization? - Loan Payment Guide (2026) Learn what amortization means on a loan and how each payment shifts from interest to principal. See how $100 extra per month saves $58k. Free guide.