Short answer
On a $20,000 loan at 7.5%, a 36-month term costs $622.12 a month and $2,396 in interest, while an 84-month term costs $306.77 a month but $5,768 in interest. Each extra year lowers the payment but raises the total cost.
1. Term comparison, $20,000 at 7.5%
| Term | Monthly payment | Total interest |
|---|---|---|
| 24 months | $899.99 | $1,600 |
| 36 months | $622.12 | $2,396 |
| 48 months | $483.58 | $3,212 |
| 60 months | $400.76 | $4,046 |
| 72 months | $345.80 | $4,898 |
| 84 months | $306.77 | $5,768 |
2. Rate matters too
| Rate ($20,000, 60 months) | Monthly payment | Total interest |
|---|---|---|
| 6% | $386.66 | $3,199 |
| 7.5% | $400.76 | $4,046 |
| 9% | $415.17 | $4,910 |
| 12% | $444.89 | $6,693 |
3. How to choose
- Pick the shortest term whose payment fits comfortably in your budget.
- A longer term gives flexibility if you can pay extra when you can and the lender allows it. See what extra payments save.
- Lenders may price terms differently. Compare actual offers, not just this table.
Test your own amount, rate and term in the Loan Calculator.
4. Frequently asked questions
Is a shorter loan term better?expand_more
It costs less in total interest but has a higher monthly payment. On $20,000 at 7.5%, 36 months costs $2,396 in interest versus $4,046 for 60 months.
How much interest does a longer loan term add?expand_more
On $20,000 at 7.5%, going from 36 to 84 months lowers the payment from $622.12 to $306.77 but raises total interest from $2,396 to $5,768.
How much does the interest rate change the payment?expand_more
On $20,000 over 60 months, 6% is $386.66 a month and 12% is $444.89, a difference of about $58 a month and $3,494 in total interest.
Can I shorten a long loan later?expand_more
Often yes, by paying extra toward principal, if your lender does not charge a prepayment penalty.