In this article
  1. The parts of a loan
  2. How is the payment calculated?
  3. Example: 100,000 at 6% per year
  4. What else raises the cost?
  5. Rules before you sign
  6. Financing alternatives
  7. Bottom line

When borrowing, most people focus on one question: “What’s the monthly payment?” The more important question is: “How much will I pay in total?” A low payment over a long term can cost far more than you expect.

The parts of a loan

How is the payment calculated?

With fixed-payment loans, the payment is set so that principal and interest are repaid together over the term. Early payments go mostly to interest; over time, more of each payment reduces the principal. You don’t need to memorize the formula — the Loan Calculator gives you the payment and the full amortization schedule.

Example: 100,000 at 6% per year

TermMonthly paymentTotal interest
3 years≈ 3,042≈ 9,519
5 years≈ 1,933≈ 15,997
7 years≈ 1,461≈ 22,712

Notice: stretching the term from 3 to 7 years roughly halves the payment but more than doubles the interest.

What else raises the cost?

Rules before you sign

  1. Keep total monthly repayments affordable; many advisers suggest staying under roughly a third of net income.
  2. Compare offers by total cost, not by payment alone.
  3. Build an emergency fund before committing to a long loan.
  4. If possible, make a larger down payment to reduce the principal.

Financing alternatives

In several countries, Islamic financing such as murabaha is available, where the bank’s profit is built into the sale price instead of interest. The comparison principle is the same: know the total amount you’ll pay and over how long.

If you’re considering saving instead of borrowing for a purchase, try the Savings Calculator.

Bottom line

The monthly payment is only part of the picture. Calculate the total cost, compare terms, and read the fee and early-repayment conditions before signing. This article is for general information, not financial advice.