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Installment & Personal Loan Calculator: Monthly Payment and Total Cost

Before you sign any loan, check what it really costs. Enter the amount, APR and number of months to see your monthly payment and how much interest you will pay in total.

Key takeaways
  • The total interest matters more than the monthly payment.
  • A longer term lowers the payment but usually raises the total cost.
  • For single-payment payday loans, use our payday loan calculator instead.

Loan payment calculator

From your loan offer or disclosure
Monthly payment$100
Total interest$206
Total repaid$1,206

Estimate for a fixed-rate loan with equal monthly payments. Fees not included in the APR, late fees and insurance products are not included. Your lender’s Truth in Lending disclosure shows the exact figures.

How APR and term change the cost of $1,000

Borrowing $1,000
APR6 months12 months24 months
18% (credit union / good credit)$53 interest$100 interest$198 interest
28% (credit union PAL cap)$83$158$317
36% (common state cap)$108$206$417
99%$308$613$1,327
160% (bad-credit installment)$515$1,058$2,367

At high APRs, stretching the term can make the interest larger than the amount borrowed. If you take a high-APR loan, paying it off early (with no prepayment penalty) saves the most.

Need $100–$1,000 before payday?

  • One free request, many lenders
  • Bad credit and benefit income considered by many lenders
  • See the APR and total cost before you sign
Start your request Takes about 5 minutes

PaydayEase is not a lender. Requests go to lenders in our network; approval, rates and terms are set by the lender. Rates & fees

How to use the calculator well

  • Use the APR, not the interest rate. APR includes most fees and is required on every loan disclosure under the Truth in Lending Act.
  • Compare the same amount and term across offers.
  • Check affordability. Make sure the monthly payment fits alongside rent, food and utilities, not just this month but every month of the term.

Which calculator fits your loan?

Loan typeUse
Installment, personal, debt consolidation, PALThis calculator
Payday loan (one payment)Payday loan APR calculator
Cash advance appTreat fees as a payday-style cost: fee ÷ amount × 365 ÷ days

Need cash before payday?Send one free request to our lender network. We are not a lender; offers and rates come from lenders.

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Frequently asked questions

How is a monthly loan payment calculated?

For a fixed-rate installment loan, the payment is set so equal monthly payments repay the principal plus interest over the term. The calculator uses the standard amortization formula.

Does a longer loan term save money?

It lowers the monthly payment but usually increases the total interest you pay, especially at high APRs.

What APR should I enter?

The APR shown on your loan offer or Truth in Lending disclosure. It includes most fees, so it reflects the true cost better than the interest rate alone.

Sources

  1. CFPB — What is a payday loan?
  2. CDFI Fund — NCUA payday alternative loans summary
  3. CFPB — What do I need to know about consolidating my credit card debt?
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