Equifax vs Experian: What Each Bureau Actually Holds

If you have ever assumed there is one central credit database in Australia, you are not alone. In reality, there were three separate consumer credit bureaus for many years. After the illion merger with Experian, there are now two: Equifax and Experian. Each holds different slices of your financial life, and which one a lender uses can affect how your application is assessed.

How Credit Reporting Bodies Work

Credit reporting bodies are private companies licensed to collect, store and supply credit information on individuals. They do not approve or decline applications. Their role is to gather data from credit providers who choose to report to them and then provide that data back to other lenders when they check your file.

Both Equifax and Experian operate under the Privacy Act and the Privacy Credit Reporting Code 2025, which regulate how they handle your personal information. They also operate under comprehensive credit reporting rules, so your file can show account opening and closing dates, credit limits and up to 24 months of repayment history, in addition to adverse events like defaults.

What Equifax Usually Sees

Equifax is the dominant bureau for formal bank lending in Australia. It is the primary bureau for most major banks and many mortgage lenders. If you hold a home loan, personal loan, car finance or credit card with a major bank, there is a good chance that data is being sent to Equifax. Many non bank lenders and credit unions also report there.

Because of that coverage, Equifax often has the broadest view of your mainstream borrowing history. It uses a 0 to 1,200 score range with bands that move from below average through average, good and very good up to excellent. A lender checking Equifax will see your repayment behaviour, credit limits, enquiries and negative listings as they are reported to that bureau.

What Experian Now Sees After Absorbing Illion

Experian’s position changed when it absorbed illion’s consumer credit reporting operations. The combined Experian bureau now incorporates what used to be two separate datasets, including illion’s strong telco, utility and non bank coverage. That means Experian can see not only bank lending but also a wide range of telecommunications, energy and smaller lender accounts where those providers report.

Experian’s scores generally run from 0 to 1,000. Its labels range from low to excellent, with bands for fair, good and very good in between. Because the score now draws on a larger, merged dataset, your Experian score may have changed after the merger even if nothing substantial changed in your day to day credit behaviour.

Which Bureau Different Applications Tend To Use

Lenders do not publish their bureau usage, but industry practice shows patterns. Home loan and mortgage lenders are more likely to rely on Equifax as their primary source, and some will pull from both bureaus for larger or more complex applications. Personal loan and car finance providers may use Equifax, Experian or a mix of both.

Telco and utility providers have historically been more heavily associated with illion, and that data is now part of Experian’s file. That means an unpaid phone bill or energy debt is more likely to show up when a lender or another telco checks Experian. Fintech and online lenders may favour Experian or use multiple bureaus, especially as buy now pay later providers began reporting under the new low cost credit rules from mid 2025.

Why Scores Differ Between The Two

Your Equifax score and your Experian score are not designed to match. Each bureau holds a slightly different set of accounts and enquiries, uses different algorithms, and receives updates on a different timetable. A late payment on a telco account might show on Experian but not on Equifax if that provider only reports to Experian. A bank loan might appear only on Equifax if the lender does not send data to Experian.

Because of this, a lender might see a risk pattern on one bureau that does not appear the same way on the other. That is why two different scores can both be accurate in their own context and still show different numbers.

Why You Should Look At Both Reports

Checking both your Equifax and Experian reports is the only way to see what any given lender might be seeing behind the scenes. A default that appears only on one bureau can still cause a decline if the lender checks that particular report. Similarly, a strong repayment history on an account that appears only on one bureau may not help you if the lender uses the other.

You are entitled to access your own reports without harming your score. Once you have both in front of you, it becomes much easier to spot errors, missing updates or negative entries that need attention. For a step by step guide through the differences between the two bureaus, what changed when illion merged into Experian and how to use that knowledge before applying, read Equifax vs Experian in Australia: After the Illion Merger.