Debt consolidation
The real cost of paying only the minimum
A minimum repayment is designed to keep an account in good standing, not to clear it. The mechanism that makes the balance last so long is simple, and it is worth understanding before you decide what to do about it.
Edward Chan
Head of Compliance and Broker Support
· 8 min read

What a minimum repayment actually is
A minimum repayment is the smallest amount you can pay in a statement period without breaching the contract. It is generally calculated as a small percentage of the closing balance, or a fixed floor amount, whichever is greater. Your own card’s terms will state which.
It is worth being clear about what that number is for. It keeps the account in good standing and it keeps the repayment history on your credit file clean. It is not a repayment plan, and it was never designed to be one.
Meeting the minimum every month is therefore both a success and a trap. You are not in arrears, nothing is being reported adversely, and the balance is barely moving. Plenty of people spend years in exactly that position without anything going visibly wrong.
What a $300 minimum repayment is made of
- Interest for the month$190
- Principal$110
Almost two-thirds of the payment services the balance rather than reducing it. That ratio, rather than the size of the debt, is what makes the tail so long.
Illustrative projection only, on an assumed balance and rate. Not a quote and not an offer of credit.
View as a table
| Component | Amount | Share |
|---|---|---|
| Interest for the month | $190 | 63% |
| Principal | $110 | 37% |
| Total | $300 | 100% |
The mechanism that makes the tail so long
Here is the whole thing in one sentence. Because the minimum is a percentage of the balance, the required payment falls at almost the same rate the balance does.
Interest is charged on the balance each period and added to it. The minimum then covers that interest plus a thin slice of principal. Next month, the balance is slightly smaller, so the minimum is slightly smaller too, so the slice of principal is smaller again. The debt does not fall in a straight line. It curves and flattens.
That is why a fixed repayment behaves so differently. Freeze the payment at today’s minimum and refuse to let it drop, and every month the interest portion shrinks while the payment stays the same, so more of it goes to principal. The same dollars, applied with a different rule, produce a completely different timeline.
The same first payment, under two rules
Both lines start at $12,000 and both start with a $300 payment. The only difference is that one payment is allowed to fall with the balance and the other is not. Five years later that rule is worth about $5,700 of debt.
Illustrative projection only, on an assumed rate and minimum repayment formula. Not a quote and not an offer of credit.
View as a table
| Month | Minimum, allowed to fall | Payment held at $300 |
|---|---|---|
| 0 | $12,000 | $12,000 |
| 10 | $11,000 | $10,800 |
| 20 | $10,000 | $9,500 |
| 30 | $9,200 | $7,900 |
| 40 | $8,400 | $6,000 |
| 50 | $7,600 | $3,800 |
| 60 | $7,000 | $1,300 |
The number already printed on your statement
Australian credit card statements carry a minimum repayment warning. It tells you how long it would take to pay off the closing balance if you made only minimum repayments, and what you would end up paying in total. It uses your balance, your rate and your card’s minimum formula.
Most people find the timeframe longer than they expected. Take the total figure it quotes, sit with it for a moment, and then treat it as the baseline that every other option is measured against.
Interest-free days and the parts people miss
Interest-free days apply only when the closing balance is paid in full. Once you are carrying a balance, most cards charge interest on new purchases from the transaction date, and the interest-free period does not return until the balance is cleared in full again. This surprises people who assume each month resets.

Cash advances sit outside the interest-free arrangement entirely. They typically attract a fee, a higher rate than purchases, and interest from the day the cash is taken. Several transactions are treated as cash advances even though they do not feel like it, including gambling transactions, some digital wallet loads and certain bill payment services.
Buy-now-pay-later accounts are a separate matter again. They do not usually charge interest, but they do charge late fees, and they are now regulated as a form of credit in Australia with suitability obligations attached. Lenders treat them as credit commitments in a loan assessment regardless of how they are marketed.
- Closing balance
- The balance at the end of a statement period. Both the minimum repayment and the interest-free arrangement are worked out from it.
- Interest-free days
- A period on purchases that applies only while the closing balance is paid in full. Carry a balance and most cards charge interest on new purchases from the transaction date.
- Cash advance
- A transaction taken outside the purchase arrangement. It typically carries a fee, a higher rate, and interest from the day it is taken.
- Buy now pay later
- Usually no interest, but late fees apply and it is regulated as credit in Australia. Lenders count it as a commitment regardless of how it is marketed.
Where your extra dollar goes
If a card carries balances at different rates, for example a purchase balance and a cash advance balance, the allocation rule decides which one your payment reduces. This matters more than most people realise.
Under the credit card reforms that took effect in 2012, payments above the minimum on regulated credit card contracts are applied to the balance attracting the highest interest rate first. Before that change, the older practice worked the other way, which meant expensive balances could sit untouched for years while cheap ones were paid down.
Before the 2012 reforms
- Payments could be applied to the cheapest balance first.
- A cash advance balance could sit untouched while a purchase balance reduced.
- Paying extra did not necessarily reach the expensive part of the debt.
- Allocation followed the contract rather than a statutory rule.
On regulated contracts since
- Payments above the minimum go to the highest-rate balance first.
- The expensive balance reduces before the cheaper one.
- Every extra dollar attacks the costliest part of the account.
- Paying exactly the minimum gives the benefit up, because nothing sits above the minimum to allocate.
The practical consequence is a good one. Anything you pay beyond the minimum goes where it does the most work. It also means paying exactly the minimum forfeits that benefit entirely, because there is nothing above the minimum to allocate.
There is a related rule worth knowing. Credit providers must assess whether you could repay the full credit limit within a prescribed period before offering or increasing a limit. The current period is set by regulation, so check it at the source. It is the reason a limit increase can be declined even when your repayments have never been late.
Four ways out, compared honestly
| Approach | What it does | Where it falls down |
|---|---|---|
| Keep paying the minimum | Meets the contract and protects your repayment history. | The payment falls with the balance, so the tail runs for years. |
| Freeze the payment at today’s minimum | Turns a falling payment into a fixed one, so principal actually reduces. | Only works if the card stops being used at the same time. |
| Balance transfer | Moves the balance to a promotional period on a new account. | The promotion ends, new purchases usually sit outside it, and a fresh limit is a fresh temptation. |
| Consolidate into a secured loan | One repayment, a scheduled end date, and a mortgage-style structure. | The term is longer and the debt is now secured against property. |

There is also the order in which you attack multiple balances. Paying the highest rate first is arithmetically the cheapest. Paying the smallest balance first closes an account sooner and gives you a visible win, which for many people is what sustains the effort. Both work. The one you will actually stick to is the better one.
If the minimum itself is out of reach
This is a different situation and it deserves a different answer. If you cannot meet minimum repayments, refinancing may not be the right first move, and it may not be available at all.
You have a right to ask your credit provider for a hardship variation. A hardship notice can be given verbally or in writing, and the provider must respond within a timeframe set by the National Credit Code. A variation might reduce payments for a period, pause them, or extend the term. It is recorded on your credit file as financial hardship information for a set period, which is a real consequence and still usually better than mounting arrears and defaults.
WeL’nd will tell you when finance is not the answer. If the honest position is that the debt exceeds what any loan structure can carry, the right people to speak to are a financial counsellor, an accountant, or a registered insolvency practitioner. Saying so is part of the job.
What to do this week
- 01
Read the warning on every statement
Each card, each account. Write down the timeframe and the total each one quotes. That is your real starting position.
- 02
List every balance, limit and rate
Cards, store cards, personal loans, buy-now-pay-later. A complete list is the only thing any of the four approaches can be tested against.
- 03
Stop the payment from falling
Set a direct debit at today’s minimum figure rather than paying the amount shown each month. This one change costs nothing and starts working immediately.
- 04
Decide the order of attack
Highest rate first for the cheapest outcome, smallest balance first for momentum. Choose one and hold to it.
- 05
Test whether consolidation improves the position
Run the numbers with a broker who will show you the total cost as well as the monthly figure. Anything you see before assessment is indicative only, and it is not an offer of credit or a guarantee of approval.





