Credit card sign-up bonuses: how to churn cards without tanking your credit score

Sign-up bonuses are the most lucrative corner of the Australian points world, and you buy every one of them with an application.

Nobody prices that part of the deal. The points land in your account, and the application lands on your credit file, where it sits for years after the flight is flown.

Most of what the internet says about protecting your score while churning was written for the American system and doesn't survive the trip across the Pacific. So we went to the primary sources, the OAIC, CreditSmart, MoneySmart and the bureaus themselves, and built the Australian answer.

What is credit card churning?

Churning means opening a card primarily for its sign-up bonus, meeting the minimum spend inside the qualifying window, banking the points, then downgrading or cancelling before the next annual fee lands, and moving on to the next card.

Done coldly, it converts card issuers' customer-acquisition budgets into travel.

The strategy runs on applications, and every application is recorded. So the churner's real constraint is the credit file the strategy writes as it goes.

What does a card application do to your credit report?

It adds an enquiry. Equifax puts it plainly: every time you apply for credit and a credit provider obtains a copy of your report, an enquiry is added to your credit report.

MoneySmart says the same about cards specifically: when you apply for a new credit card or a balance transfer, it's added to your credit report.

The OAIC's retention rules keep credit enquiries on your file for 5 years, which is longer than most churners keep any individual card. A lender pulling your file in 2031 will still see the run of applications you made this year.

Does checking your own file hurt your score?

No. CreditSmart's FAQ explains that accessing your own report is a soft enquiry, which will not be shown on credit reports provided to credit providers and will not affect your credit score, and Equifax confirms that ordering your own Equifax report doesn't hurt your Equifax score.

You're entitled to a free copy of your credit report, so a churner can, and should, read their own file as often as they like.

Does churning tank your Australian credit score?

A run of applications can lower your score, and the sources agree in almost identical words.

MoneySmart: if you apply several times in a short period of time, it can harm your credit score. Equifax: shopping around for credit and applying to a number of different credit providers within a short space of time may negatively impact your Equifax Credit Score.

Experian: multiple enquiries in a short timeframe may raise a red flag to lenders. Three primary sources, one message, and all of them turn on the words short space of time.

CreditSmart, the credit industry's own consumer education site, supplies the honest counterweight: multiple hard enquiries within a short period can temporarily lower your credit score, but the impact of enquiries is typically small and diminishes over time. So churning at a steady pace doesn't wreck a score, while unpaced churning erodes one.

There's also no single number to guard. CreditSmart notes that each credit reporting body, and any credit provider that prefers to, calculates its own score with its own formula, so you have several scores, and they all read the same underlying file your applications write to.

How is Australian credit scoring different from the US?

Australia has no FICO score, no single national number, and no scoring system built around "credit utilisation".

Credit reporting bodies hold your file, and each scores it independently. Equifax's score runs from 0 to 1,200, Experian's from 0 to 1,200, and MoneySmart's summary is that your score will sit between zero and either 1,000 or 1,200 depending on the agency.

The Australian sources name four factors: repayment history, the frequency and type of credit you've applied for, the amount of credit you hold, and adverse events like defaults. Engineering a percentage of your limit each month is an American habit, and the Australian sources never name it.

What is comprehensive credit reporting?

Comprehensive credit reporting is the distinctly Australian piece. Since CCR, your file carries positive data as well as negative, and your repayment history is updated as your accounts are updated each month.

CreditSmart's plain-language summary is that if you have been paying off your credit card and loans on time, this positive history will count towards your credit worthiness. Every part of the record has an expiry date, set out in the OAIC's guidance:

What happens when you open and close cards?

Opening and closing both leave marks, which is inconvenient for a strategy built on doing each every few months.

On the opening side, CreditSmart cautions against opening a lot of new accounts too rapidly: new accounts lower your average account age, and rapid account buildup can look risky.

On the closing side, CreditSmart is equally direct. A closed account will still show up on your credit report and may be considered in the calculation of a score, and under the OAIC's rules the account information stays on file for 2 years from the end of the credit.

So cancelling a card the day after the bonus posts tidies your wallet without tidying your file.

Do credit limits matter too?

Limits are part of the record. Your report lists the credit limit of each product you've held in the last two years, and Equifax notes that both the type of credit and the size of the loan or credit limit you have applied for can have an impact on your score.

There's a structural reason limits get attention. MoneySmart explains that when a provider sets your card limit, the maximum is based on your ability to pay it back within three years.

Every open limit is credit you could draw tomorrow, and that's how the next assessor will read it. CreditSmart's list of what providers want to see includes, verbatim, not too much credit, and it counts credit you've simply applied for, not just credit you've taken out.

What should you do when a home loan is coming?

Go quiet early, because a mortgage assessor reads everything the churn wrote. The enquiries from your last five years of applications sit on the file they pull, and your open cards and their limits are listed alongside.

A lender sizing you up wants to see, in CreditSmart's words, not too much credit.

So stop applying well before the loan, and close or reduce the limits you're not using, knowing the closed accounts stay visible for two years. Let time work for you as well, since CreditSmart notes the effect of enquiries diminishes and older credit problems count for less.

Each lender weighs all of this with its own formula, and lenders don't publish those. If the mortgage is real, put your file in front of a broker before you put another application on it.

What routine protects your score while you churn?

• Space the applications. Experian's advice is to space out credit applications rather than cluster them. Apply for one card at a time, settle it and understand it, then send the next application in.
• Pay in full, on time, every month. Repayment history reaches your file as your accounts update each month, CreditSmart notes payments 14 or more days late can show in your 24-month repayment history, and interest at card rates outruns any points haul regardless.
• Never spend extra to hit a minimum. A bonus funded by spending you wouldn't otherwise have done costs you more than it pays.
• Read your own file. A free credit report is your right, and requesting it is a soft enquiry that costs your score nothing. Check it before the churn starts and before any big application.
• Diarise the deadlines on approval day. The minimum-spend window and the fee anniversary both arrive quietly, and both are easy to forget.

How do you track the spending side across four banks?

Sloppy bookkeeping costs real money. Minimum spends tracked by feel get missed, and a missed minimum turns an annual fee into a pure loss.

Kleev fits the churner's workflow here, and it never links to your banks to do it. Export each card's statement as a CSV and drop it in.

Every card becomes its own account in one combined view, repayments from your transaction account are detected as transfers so they don't double-count as spending, and checking a minimum spend becomes a ten-second filter. The Amex export flow, a churning staple, is covered step by step in our Amex CSV guide.

The same combined view helps you close cards cleanly. Kleev's recurring view surfaces each card's annual fee when it posts, alongside the forgotten subscriptions still quietly billing to a card you're about to close.

Sweep that list before you cancel, and nothing bounces after the account shuts.

Boring records are what make this strategy pay: a list of live cards, their deadlines and limits, and one record that tells the truth about the spending. Kleev supplies the record, and you supply the discipline. Keep every card in one place with Kleev →

Common questions

Does credit card churning hurt your credit score in Australia?

It can, mainly through enquiries. Every card application is recorded on your credit report as an enquiry and stays there for 5 years, and Equifax warns that shopping around for credit with a number of providers within a short space of time may negatively impact your score. CreditSmart notes the impact of enquiries is typically small and diminishes over time, so a paced churn reads very differently on file from a burst of applications.

How long do credit card applications stay on my credit report?

Five years. The OAIC's credit reporting guidance lists credit enquiries as staying on your report for 5 years. Repayment history on your accounts is held for 2 years, and information about an account itself remains for 2 years from the end of the credit, so an application outlasts the card it opened in most churns.

Does closing a credit card remove it from my credit report?

No. CreditSmart is blunt about it: a closed account still shows up on your credit report and may be considered in the calculation of a score. Under the OAIC's retention rules, consumer credit account information stays on your report for 2 years from the end of the credit, so the card you cancel today keeps describing you for another two years.

Is there one official credit score in Australia?

No. Australia has no FICO score. Your credit file is held by credit reporting bodies (Equifax, Experian and illion), each calculates its own score with its own formula, and a lender can use a bureau's score or calculate its own. Equifax scores run from 0 to 1,200, and MoneySmart notes scores run to either 1,000 or 1,200 depending on the agency.

Does checking my own credit score affect it?

No. Accessing your own credit report is a soft enquiry: CreditSmart states it will not be shown on credit reports provided to credit providers and will not affect your credit score, and Equifax confirms that getting your own Equifax report will not negatively impact your Equifax score. You can request a free copy of your credit report, so checking your file during a churn costs you nothing.