Your repayments depend on a few key numbers: how much you borrow, the interest rate, and how long you take to pay it back.

Key things you need

To get an actual repayment figure, you (or a calculator) will need:

  • Loan amount (how much you’re borrowing).
  • Interest rate (APR, fixed or variable).
  • Term (how many years/months you’ll repay over).
  • Payment frequency (monthly is most common).

Without those, any “what will my repayments be” answer is only a rough illustration, not a precise quote.

The standard repayment formula

Most personal, car and home loans use an amortising structure, where you pay the same amount each period and the mix of interest and principal changes over time.

The standard formula for a fixed-rate monthly repayment is:

M=P×r(1+r)n(1+r)n−1M=P\times \frac{r(1+r)^n}{(1+r)^n-1}M=P×(1+r)n−1r(1+r)n​

Where:

  • MMM = monthly repayment
  • PPP = amount borrowed
  • rrr = monthly interest rate (APR ÷ 12)
  • nnn = total number of monthly payments

Online loan or mortgage calculators use this same formula behind the scenes.

Quick example (illustration only)

Say you borrow 10,000 at 6% APR over 5 years (60 months).

  • APR 6% → monthly rate r=0.06/12=0.005r=0.06/12=0.005r=0.06/12=0.005.
  • Term 5 years → n=5×12=60n=5\times 12=60n=5×12=60.

Plugging into the formula, the monthly repayment comes out to roughly 193–194 in the same currency as the loan.

Over the full term you’d pay around 11,600 in total, so about 1,600 of that is interest.

How to get your exact figure

Because each lender can use slightly different assumptions (fees, compounding, day-count conventions), the most accurate way to see “what will my repayments be” is to:

  1. Use a reputable online loan / repayment / mortgage calculator and enter:
    • Loan amount
    • Interest rate (APR)
    • Term
    • Payment frequency
  2. Or ask your lender/broker for a formal quote , which should show:
    • Regular repayment amount
    • Total interest over the life of the loan
    • Any fees added on top.

If you share your loan amount, interest rate, and term, a step‑by‑step walkthrough can be given using that exact scenario.

Information gathered from public forums or data available on the internet and portrayed here.