Simple Interest Loan
What Is Simple Interest?
Simple interest is interest calculated only on the original principal — not on previously earned or accrued interest.
Unlike compounding, simple interest does not earn interest on interest.
It grows in a straight line.
How Simple Interest Works
Let’s say you borrow $10,000 at 5% simple interest for one year.
Interest = $10,000 × 5%
You pay $500 in interest for the year.
If the loan lasts two years, you pay:
$500 per year × 2 years = $1,000 total interest.
The interest is always based on the original $10,000 — not a growing balance.
Where Simple Interest Is Used
Simple interest is commonly used for:
- Some personal loans
- Auto loans (in many cases)
- Short-term loans
- Certain private lending arrangements
Most traditional installment loans use simple interest with amortization.
Credit cards, however, typically use compound interest instead.
Simple Interest vs. Compound Interest
- Simple Interest → Calculated only on principal.
- Compound Interest → Calculated on principal plus accumulated interest.
For borrowers, simple interest is generally less expensive than compound interest — assuming payments are made on time.
Why Simple Interest Matters
Understanding simple interest helps you:
- Estimate total borrowing cost
- Compare loan offers
- Avoid surprises
When evaluating loans, always look at the Annual Percentage Rate (APR), which provides a fuller picture of borrowing cost.
FAQs About Simple Interest
Is simple interest better than compound interest?
For borrowers, usually yes. For savers, compound interest is more powerful.
Do mortgages use simple interest?
Most fixed-rate mortgages follow amortization schedules, which include interest calculated on the remaining balance.
Does simple interest affect my credit score?
No. Your credit score depends on payment behavior and debt levels, not interest calculation method.
Can I reduce simple interest costs?
Yes. Paying down principal early reduces future interest charges.
Related Terms
