An installment loan is any loan you repay in fixed, scheduled payments — which makes it the broadest category in consumer lending. Mortgages, auto loans, and personal loans are all installment loans. This guide covers the kind most people mean when they search the term: unsecured personal installment loans of $500 to $50,000, repaid over 3 to 60 months.
How installment loans work
You receive a lump sum, then repay it in equal payments (usually monthly) that each cover interest plus principal. Three numbers define the deal:
- Principal — what you borrow
- APR — interest plus mandatory fees, annualized
- Term — how long you repay
Because the payment is fixed and the end date is set, installment loans are predictable in a way credit cards and payday loans are not. You always know exactly when you’ll be done.
Installment loans vs. payday loans: the difference that matters
| Installment loan | Payday loan | |
|---|---|---|
| Repayment | Fixed monthly payments over months/years | Lump sum in ~2 weeks |
| Typical APR | 6%–36% (mainstream) | 300%–600%+ |
| Builds credit | Usually yes | Almost never |
| Rollover trap | No | Core of the business model |
A short-term installment loan — even one at the top of the mainstream APR range — is structurally safer than a payday loan because each payment retires principal. Payday loans are designed to roll over.
What installment loans cost in 2026
| Credit tier | APR range | Typical amounts | Typical terms |
|---|---|---|---|
| Excellent (720+) | 6%–12% | $5K–$50K | 24–60 mo |
| Good (660–719) | 11%–18% | $2K–$40K | 24–60 mo |
| Fair (600–659) | 17%–30% | $1K–$20K | 12–48 mo |
| Poor (below 600) | 28%–36%+ | $500–$10K | 6–36 mo |
Add origination fees of 0–10% depending on lender and credit tier. Always compare APR, which folds those fees in.
Choosing the right term length
Shorter term (6–24 months): higher payment, lower APR, far less total interest. Right when the loan covers a one-time gap and your budget can absorb the payment.
Longer term (36–60 months): lower payment, higher total cost. Right when payment size is the binding constraint — but check that you’re not paying double the interest for breathing room you don’t need.
Rule of thumb: pick the shortest term whose payment stays under 10–15% of your monthly take-home pay. If no term fits that test, borrow less.
Where to get an installment loan, ranked
- Credit unions — lowest rates for fair/poor credit (18% federal APR cap on most loans), human underwriting.
- Online lenders — fastest (same-day to 3 days), widest credit acceptance, easy prequalification. The default choice for most borrowers.
- Banks — competitive for existing customers with good credit; slower and stricter otherwise.
- Point-of-sale lenders — fine for specific purchases; rates vary wildly, read terms.
Storefront installment lenders are often state-licensed but priced near payday levels. Check the APR against online options before signing anything in a strip mall.