One of the most misunderstood areas of practice management for bookkeepers is the legal framework that governs who can lodge a BAS and under what authority. The short answer is: either the registered entity itself, a registered tax agent, a registered BAS agent, or — in specific circumstances — a GST nominee or joint venture operator. Getting this wrong is not a minor administrative issue; it can expose both the bookkeeper and the client to penalties, and it can breach the Tax Agent Services Act 2009 (TASA) in ways that put your registration at risk.
The Regulatory Landscape: TASA and the TPB
The Tax Practitioners Board (TPB) administers TASA, which governs the provision of BAS services and tax agent services in Australia. Since 2010, it has been unlawful to provide BAS services for a fee or reward unless you are registered with the TPB as either a registered BAS agent or a registered tax agent.
BAS services are defined in section 90-10 of the Tax Agent Services Act and include:
- Ascertaining or advising about a client's liabilities, obligations, or entitlements under a BAS provision (GST, PAYG withholding, PAYG instalments, FBT instalments, luxury car tax, wine equalisation tax, fuel tax credits).
- Representing a client in dealings with the ATO about a BAS provision.
- Lodging a BAS on behalf of a client.
If you are charging a client for any of these services, you must be registered. Providing BAS services without registration can result in civil penalties of up to $13,750 per contravention for an individual.
BAS Agent vs Tax Agent: What Each Can Do
The distinction between a BAS agent and a tax agent matters because their scopes differ significantly.
Registered BAS agents can:
- Prepare and lodge BAS.
- Provide advice on GST, PAYG withholding, PAYG instalments, FBT instalments, LCT, WET, and fuel tax credits.
- Represent clients in ATO disputes involving BAS provisions.
Registered BAS agents cannot:
- Prepare income tax returns.
- Provide advice on income tax deductibility.
- Advise on superannuation guarantee obligations beyond the PAYG withholding context.
Registered tax agents can do everything a BAS agent can, plus income tax, superannuation, and the full range of ATO dealings. Many practices employ both — senior staff hold tax agent registration, while bookkeeping staff hold BAS agent registration.
The practical implication: If your client asks you, as a BAS agent, whether their legal fees are deductible for income tax purposes, you cannot answer that question for a fee. You can refer them to a tax agent. Crossing the boundary between BAS services and tax advice — even informally — creates TASA exposure.
Nominee Arrangements Under the GST Act
The GST Act (A New Tax System (Goods and Services Tax) Act 1999) provides for nominee arrangements in specific circumstances. A GST nominee is an entity that can lodge GST returns and make GST payments on behalf of another entity, without that entity needing to be independently registered for GST.
The two main scenarios where nominees are used:
Incapacitated entities (section 58-10): If a registered entity becomes incapacitated — through bankruptcy, insolvency, or the appointment of a liquidator or receiver — the incapacity representative (liquidator, trustee in bankruptcy, receiver) becomes the entity's GST nominee for the duration of the incapacity. The representative lodges BAS and accounts for GST on supplies made in the course of winding up the entity.
Resident agents acting for non-residents (section 57-5): A non-resident entity that makes taxable supplies in Australia may appoint a resident agent as its GST nominee. The resident agent registers for GST, accounts for GST on the non-resident's Australian supplies, and lodges BAS in its own name on the non-resident's behalf. This arrangement is common for foreign businesses that make occasional Australian sales — software subscriptions, professional services — without having a permanent establishment.
Joint Venture Operators
Under subdivision 51-A of the GST Act, the operator of a GST joint venture is responsible for lodging the joint venture's BAS and accounting for GST on all supplies and acquisitions made through the joint venture. Joint venture participants do not individually register or lodge for the joint venture — the operator handles all of it.
If your client is the operator of a joint venture, they need a separate GST registration for the JV and must maintain separate books for JV transactions. If your client is a participant (not the operator), they receive distributions from the joint venture that are treated as supplies from the operator to the participant, and they claim GST credits on those supplies in their own BAS.
Agent Obligations vs Client Obligations
A fundamental principle of the BAS agent regime is that the client remains ultimately responsible for the accuracy and payment of their tax obligations. A BAS agent who lodges a BAS on a client's behalf is acting as the client's agent — the legal obligation to report accurately and pay on time sits with the client.
However, TASA imposes its own obligations on BAS agents that are independent of the client relationship:
- Due diligence: A BAS agent must take reasonable care in ascertaining a client's state of affairs.
- Reasonable reliance: An agent may rely on information provided by a client without independent verification, provided the agent does not have reason to believe the information is false or misleading.
- Notification of errors: If an agent becomes aware of an error in a previously lodged BAS, they must advise the client promptly and take reasonable steps to have the error corrected.
- Compliance with ATO requirements: An agent cannot lodge a BAS that they know, or reasonably should know, to be false or misleading.
Professional Indemnity and Liability
BAS agents are required to hold professional indemnity insurance meeting the TPB's minimum requirements: currently at least $250,000 coverage for practitioners with a low-risk client base (no more than 100 clients, no complex matters). Larger practices should carry $1 million or more.
Critically, the PI policy must cover the agent's own negligence — not the client's errors. If the client provides incorrect data and the resulting BAS is wrong, the agent's PI policy will not respond to a claim arising from the client's own error. This is why the data accuracy disclaimer in your client service agreement is so important — it documents clearly that the accuracy of source information is the client's responsibility.
If you are considering nominee arrangements for non-resident clients or incapacity representations for insolvency matters, consult your PI insurer before taking on these engagements. They represent a different risk profile than standard BAS lodgement, and your policy may require notification or endorsement.