Finance calculators

CBA Loan Repayment Calculator

Updated Sep 10, 2026 By Infinity Calculator
Loan A details
Rate type

$1,000$100,000
Slider moves in $500 steps; type any amount from $1,000 to $100,000.
years
1 year7 years
1–7 years (12–84 months). Switching units converts your value.
0.01%30.00%
Type to 0.01% precision; the slider steps in 0.25%.
Typical rate Indicative range only — the rate you are offered depends on your credit assessment.
Repayment frequency
Loan A results
Your repayment
Total amount repaid
Total interest paid
Total fees
Cost of credit (interest + fees)
Comparison rate The comparison rate folds the upfront and ongoing fees you entered back into a single annual rate, so loans with different fee structures can be compared fairly. With no fees entered it matches your interest rate.
Number of repayments
Where your money goes — Loan A
    Loan A cost breakdown
    ComponentAmount
    Remaining balance over time
    Step-by-Step Solution

    Introduction

    This CBA Loan Repayment Calculator shows what a loan will really cost you. Type in your loan amount, term, and interest rate. The calculator shows your weekly, fortnightly, or monthly repayment right away.

    It works for personal loans, car loans, and home improvement loans. You can pick a fixed or variable rate. You can also add fees, like an upfront fee or a monthly account fee, to see how much they add to your cost.

    You get more than one number. The tool shows your total interest, total fees, comparison rate, and how many repayments you will make. Charts show where each dollar goes and how your balance drops to zero. A full repayment schedule lists every payment, and a step-by-step section shows the math behind the answer.

    Want to test two options? Turn on compare mode and check two loans side by side. The calculator tells you which one costs less and by how much. Use it before you apply, so you know what fits your budget.

    How to use our CBA Loan Repayment Calculator

    Enter your loan amount, term, interest rate and how often you pay. The calculator shows your repayment, total interest, total fees, cost of credit, comparison rate and a full repayment schedule.

    Loan purpose: Pick Personal Loan, Car Loan or Home Improvement Loan. This sets the typical rate range shown under the rate box.

    Rate type: Choose Fixed if your rate stays the same, or Variable if it can change. Variable adds a note that your real repayments may move.

    Loan amount: Type how much you want to borrow, or drag the slider. You can enter $1,000 up to $100,000.

    Loan term: Choose Years or Months, then type the number or use the slider. The range is 1 to 7 years (12 to 84 months).

    Annual interest rate (p.a.): Type your rate, like 6.99%. You can type any rate from 0.01% to 30.00%, and the slider moves in 0.25% steps.

    Repayment frequency: Pick Weekly, Fortnightly or Monthly. This changes the size and number of your repayments.

    Include fees (optional): Click this to add an establishment (upfront) fee and a monthly account-keeping fee. Fees are added to your total cost and lift your comparison rate.

    Compare a second loan: Turn this on to fill in Loan B and see both loans side by side, with the dollar difference and which one is cheaper.

    Calculate, Reset and Print: Results update as you type, but you can click Calculate to refresh. Reset puts the default values back, and Print Summary prints your results and schedule.

    Loan Repayments Explained

    A loan repayment is the set amount you pay back to the bank each week, fortnight, or month. Every repayment is split into two parts: principal (the money you borrowed) and interest (what the bank charges you for lending it). Early on, most of your payment goes to interest. Near the end, most of it goes to principal. This slow shift is called amortisation.

    What Changes Your Repayment

    • Loan amount: Borrow more and you pay more each time.
    • Loan term: A longer term lowers each repayment but raises the total interest you pay. A shorter term costs more each month but less overall.
    • Interest rate: Even a small rate drop can save you hundreds or thousands of dollars.
    • Repayment frequency: Weekly and fortnightly payments chip away at the balance a little faster than monthly ones.
    • Fees: An upfront (establishment) fee and a monthly account-keeping fee both add to your real cost.

    Fixed vs Variable Rates

    A fixed rate stays the same for the whole term, so your repayment never changes. A variable rate can go up or down, which means your repayment can change too. Fixed rates are easier to budget for. Variable rates can save money if rates fall, but they cost more if rates rise.

    Why the Comparison Rate Matters

    The interest rate alone does not show the full cost of a loan. The comparison rate rolls the interest rate and the fees into one number.1 Two loans can both advertise 6.99% p.a., but the one with big fees will have a higher comparison rate. Always compare loans using this number, not just the headline rate.

    Personal, Car, and Home Improvement Loans

    Car loans usually have the lowest rates because the car acts as security. The lender can take it back if you stop paying. Unsecured personal loans have no security, so rates are higher. Home improvement loans sit in between. Your credit history, income, and the loan size all affect the rate you are actually offered.

    Ways to Pay Less Interest

    • Pick the shortest term you can comfortably afford.
    • Make extra payments when you can, since they come straight off the principal.
    • Switch to weekly or fortnightly repayments if your lender allows it.
    • Check for early repayment (break) fees before you pay a loan off ahead of time.
    • If you hold several debts, rolling them together may cut your rate.

    These figures are estimates to help you plan. Your real repayment will be confirmed by your lender after a credit check.


    Formulas used

    Periodic interest rate
    r = \frac{R\%}{p} \div 100
    Total number of repayments
    n = \frac{T_{\text{months}}}{12} \times p
    Base repayment (amortisation formula)
    M = P \times \frac{r(1+r)^{n}}{(1+r)^{n} - 1}
    Fee per repayment period and total repayment
    F_{\text{period}} = F_{\text{monthly}} \times \frac{12}{p}, \qquad \text{Repayment} = M + F_{\text{period}}
    Interest and principal for each period
    I_k = B_{k-1} \times r, \qquad P_k = M - I_k, \qquad B_k = B_{k-1} - P_k
    Total fees, total repaid and total interest
    \text{Fees} = F_{\text{period}} \times n + F_{\text{upfront}}, \qquad \text{Total} = P + \sum I_k + \text{Fees}
    Comparison rate (solve for i, then annualise)
    P - F_{\text{upfront}} = (M + F_{\text{period}}) \times \frac{1 - (1+i)^{-n}}{i}, \qquad \text{Comparison rate} = i \times p \times 100\%

    Frequently asked questions

    Why is my bank quote different from this result?

    Small gaps are normal. Lenders may:

    • Count days in each month instead of even periods
    • Add fees this tool does not know about, like insurance or a broker fee
    • Set your first payment date weeks after settlement
    • Offer you a different rate after a credit check

    The result here is a close estimate, not a formal offer.

    What does cost of credit mean?

    Cost of credit is the extra money you pay on top of what you borrowed. It is your total interest plus all fees. If you borrow $25,000 and repay $29,500, your cost of credit is $4,500.

    Does paying weekly really save money?

    A little, yes. Weekly means 52 payments a year and fortnightly means 26. Interest is charged on a smaller balance more often, so you pay slightly less interest than monthly. Switch the frequency buttons and watch the total interest line change.

    Why is my comparison rate the same as my interest rate?

    Because you have not entered any fees. With zero fees, there is nothing extra to fold into the rate. Click Include fees and add an upfront or monthly fee, and the comparison rate will rise above your interest rate.

    What is an establishment fee?

    It is a one-off fee the lender charges to set up your loan. It is often $150 to $600. Type it into the upfront fee box. The tool adds it to your total cost and to your comparison rate, but it does not add it to the amount you borrow.

    Why is the loan term capped at 7 years?

    Most Australian personal, car and home improvement loans run for 1 to 7 years (12 to 84 months). That is the range lenders offer, so the tool sticks to it.

    The typical rate range under the rate box: will I get that rate?

    Not always. That range is a guide based on your loan type, loan size and term. Your real rate depends on your credit score, income and history. Enter the rate you were quoted for the most accurate answer.

    Can I compare a weekly loan against a monthly one?

    Yes. Turn on Compare a second loan and set a different frequency for Loan B. The difference table lines up the yearly cost, total interest and total repaid, then tells you which loan is cheaper.

    Why is my last repayment a bit different in the schedule?

    Rounding. Each payment is rounded to cents, so a few cents can be left over. The final row clears whatever is left so your balance lands exactly on $0.00.

    How does the monthly account fee work if I pay weekly?

    The tool spreads it evenly. A monthly fee is multiplied by 12 and divided by the number of payments per year. So a $10 monthly fee is about $2.31 a week or $4.62 a fortnight. It is added on top of your principal and interest payment.

    Should I pick the shortest term I can?

    Pick the shortest term you can comfortably afford. A shorter term means a bigger repayment but far less interest overall. Test a few terms here, then check the payment against your income with a Budget Calculator.

    What does number of repayments mean?

    It is how many payments you will make in total. A 5 year loan paid monthly is 60 repayments. The same loan paid fortnightly is 130, and weekly is 260. Each payment is smaller, but there are more of them.


    Sources

    1. Comparison rate (glossary definition). Moneysmart, Australian Securities and Investments Commission. Accessed September 10, 2026.