RateCity is one of Australia's largest financial comparison platforms, covering home loans, savings accounts, credit cards, and personal loans. It publishes rate tables, gold star awards, and product rankings that millions of Australians use as a starting point for financial decisions.
Centza is an AI-native financial analysis platform. It does not list products or publish rankings. It diagnoses whether you are overpaying on what you already have.
Understanding which tool is right for a given situation depends on where you are in the decision process.
RateCity is owned by the Australian Financial Review Group (Nine Entertainment). It earns revenue through referral fees and advertising. When you click through to a lender, bank, or financial provider from RateCity and apply for a product, RateCity receives a commission. Providers also pay for premium placement and "gold star award" sponsorships.
RateCity is an authorised credit representative and holds an Australian Financial Services Licence, which allows it to provide certain types of general financial product advice. Its rate comparison data is generally accurate, but the products shown most prominently are not purely ranked by best value — commercial placement arrangements influence the order and visibility of results.
This is disclosed in RateCity's financial services guide. It is the standard operating model for comparison sites in Australia. It is worth knowing before you treat a top-ranked result as a neutral recommendation.
Centza has no commercial relationships with lenders, banks, or insurers. The mortgage checker does not list lenders — it calculates how much you are likely overpaying right now, gives you a dollar figure, and tells you what rate you should be targeting based on current market pricing from the RBA and public lender data.
The savings checker does the same for term deposits and high-interest savings accounts — it compares your current rate against the best available market rate, names the gap, and explains what's available without referring you to a provider for a fee.
| Centza | RateCity | |
|---|---|---|
| Revenue model | Subscription / free tools | Referral commissions, advertising, sponsored placements |
| Referral fees from providers | No | Yes (disclosed) |
| Sponsored product rankings | None | Gold star awards include paid placements |
| Overpayment diagnosis | Yes — dollar figure, your situation | Rate tables only, no personalised gap |
| Mortgage loyalty tax calculation | Yes — what you pay vs what you should pay | Not directly |
| Savings rate comparison | Yes — current best vs your rate | Yes — full rate table |
| AI-personalised analysis | Yes — quiz inputs, your profile | Generic tables only |
| AFSL held | No (general information only) | Yes (authorised credit rep, general advice) |
| Requires sign-up | No — free, no account | No for basic browsing |
Australia's mortgage market has a well-documented "loyalty tax" — existing borrowers on standard variable rates pay significantly more than new borrowers who negotiate or refinance. The average outstanding mortgage rate in Australia is approximately 7.10% (RBA data, 2026). The lowest available variable rates from non-bank lenders are around 5.69–5.99%. For a $600,000 loan, that gap is roughly $6,000–$8,000 per year in excess interest.
RateCity shows you the lowest available rates — useful once you have decided to refinance. Centza answers the earlier question: are you in the group being overcharged, and by how much? That framing often motivates action where browsing a rate table does not.
Mortgage rate data sources: RBA Statistical Tables (current cash rate and average outstanding rates), major bank published standard variable rates, non-bank lender advertised rates from public pricing pages. Centza updates this data regularly.
RateCity has breadth. It covers hundreds of home loan products, most major banks and credit unions, and provides genuine rate comparison data that is generally up to date. For a borrower who has confirmed they need to refinance and wants to systematically compare specific lenders — interest rates, comparison rates, fees, features, offset options — RateCity is a useful tool for that specific step.
Its savings account comparison is also genuinely useful for finding the current best available HISA or term deposit rate across the market.
Use Centza first — before you start browsing products. Confirm whether you are overpaying, understand what a competitive rate looks like for your situation, and get a clear dollar figure. That context makes every subsequent step more productive.
Use RateCity (or Canstar, Finder, or any neutral comparison) when you are at the product selection stage — comparing specific lenders, checking comparison rates versus advertised rates, reviewing fees. For mortgage product selection, consider also checking with a fee-for-service mortgage broker who does not earn trailing commissions.
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