What the duty is, and where it comes from
The best interests duty is not industry custom or a marketing promise — it is a statutory obligation in Part 3-5A of the National Consumer Credit Protection Act 2009. Parliament inserted it through the Financial Sector Reform (Hayne Royal Commission Response—Protecting Consumers (2019 Measures)) Act 2020, implementing Recommendation 1.2 of the Financial Services Royal Commission, along with the accompanying reforms to broker remuneration. Mortgage brokers have had to comply since 1 January 2021; ASIC had deferred the original 1 July 2020 start date by six months because of COVID-19.
The guide to Part 3-5A (s 158K) sets out the scheme in four sentences: mortgage brokers must act in the best interests of consumers when providing credit assistance; where there is a conflict of interest, they must give priority to consumers; brokers and mortgage intermediaries must not accept conflicted remuneration; and employers, credit providers and mortgage intermediaries must not give it.
| Provision | What it does |
|---|---|
| s 158LA (licensees) and s 158LE (credit representatives) | The licensee must act in the best interests of the consumer in relation to the credit assistance. Stated civil penalty: 5,000 penalty units. Under s 158LE(2) the licensee must also take reasonable steps to ensure its credit representatives comply. |
| s 158LB and s 158LF | The conflict priority rule. Where the broker knows, or reasonably ought to know, of a conflict between the consumer’s interests and those of the licensee, an associate, a representative or a representative’s associate, it must give priority to the consumer’s interests. Stated civil penalty: 5,000 penalty units. |
| s 158N and ss 158NB–158NF | Define conflicted remuneration and ban it — brokers, mortgage intermediaries and their credit representatives must not accept it; employers, credit providers and mortgage intermediaries must not give it, in the circumstances prescribed by the regulations. |
| s 158T | Anti-avoidance. Prohibits entering into or carrying out a scheme for the sole or a not-incidental purpose of avoiding any provision of Part 3-5A. |
| s 15B | Defines “mortgage broker” — the definition that determines who the duty attaches to in the first place. |
The duty is not limitless in scope. RG 273.5 confirms it applies only to credit products regulated under the National Credit Act — credit provided to consumers for personal, domestic or household purposes, or to purchase or improve residential investment property. Commercial lending sits outside it.
Where the words come from
The statutory text quoted throughout this resource is taken from the authorised compilation of the NCCP Act registered on the Federal Register of Legislation — Compilation No. 50, compilation date 10 June 2025, which was the latest registered compilation when this resource was verified on 12 July 2026. The conflicted remuneration conditions come from the NCCP Regulations 2010, authorised Compilation No. 56 (1 November 2025). ASIC’s administrative guidance is RG 273, published 24 June 2020.