Aggregate, not per claim
The minimum is the total the policy will pay across the whole policy year. One large claim can use most of it.

BOOKKEEPER AND BAS AGENT INSURANCE
The Tax Practitioners Board sets the minimum by your fee turnover: $250,000 for turnover up to $75,000, $500,000 for turnover from $75,001 to $500,000, and $1,000,000 above that. The minimum is the floor, not the answer. Here is the full TPB table, what the TPB recommends on top of it, and where our placements usually land.
Premiums and outcomes described are specific to this client and indicative only. Your own terms will depend on your circumstances and the insurer.
THE SHORT ANSWER
How much professional indemnity insurance does a registered BAS agent or tax agent need in Australia?
A registered BAS agent or tax agent must hold professional indemnity insurance with a minimum aggregate limit set by the Tax Practitioners Board: $250,000 if annual fee turnover (excluding GST) is up to $75,000, $500,000 for turnover of $75,001 to $500,000, and $1,000,000 for turnover over $500,000. Each figure is inclusive of legal and defence costs. The TPB also requires retroactive cover if you held a previous policy, and recommends automatic reinstatement, fidelity cover for practices with staff, and run-off cover when you cease practising.
On our placements, most sole practitioners have chosen $500,000 or $1,000,000 rather than the floor, because the premium difference has usually been small. Call us with your expected fee turnover and we can talk through which TPB tier applies and what the limit options look like.
| Tier | Annual turnover (fees received, excluding GST) | Minimum aggregate cover |
|---|---|---|
| Tier 1 | Up to $75,000 | $250,000 inclusive of legal and defence costs |
| Tier 2 | $75,001 to $500,000 | $500,000 inclusive of legal and defence costs |
| Tier 3 | Over $500,000 | $1,000,000 inclusive of legal and defence costs |
Three details in that table catch people out.
The minimum is the total the policy will pay across the whole policy year. One large claim can use most of it.
Lawyers' fees come out of the same limit unless the policy pays costs in addition. On a $250,000 limit, defence costs alone can be a large share, which is why a costs-in-addition wording or a higher limit is worth pricing.
If you have no prior-year figures because you are newly registered, the TPB expects a reasonable estimate of the coming year. See PI for a new BAS or tax agent registration.
| Feature | What the TPB says | Why it matters to you |
|---|---|---|
| Retroactive cover | Where you held an immediately previous policy, the guideline requires retroactive cover to the earlier of the retroactive date in your most recent policy or the start of your first policy | Work you did three years ago can be claimed on today. A new policy with a fresh retroactive date leaves that work uninsured. |
| Automatic reinstatement | The guideline recommends the benefit of at least one automatic reinstatement, if not multiple or unlimited | If a claim uses up the limit, the policy restores it for the rest of the year instead of leaving you bare. |
| Fidelity (innocent party fraud) | The guideline recommends innocent party fraud or dishonesty cover for the actions of employees, partners or directors, except for sole practitioners | Covers losses caused by a dishonest employee, partner or director. Relevant the moment you take on staff or an offshore contractor. |
| Run-off cover | The guideline recommends run-off cover if you propose to cease providing tax agent services during your registration period | Claims arrive after you stop practising. See run-off cover for BAS agents. |
| Excess you can pay | The guideline expects you to consider how you would fund the excess and any gap | A $2,500 excess on a $250,000 policy is a different proposition for a sole trader than for a practice with staff. |
One placement and one quoting exercise from our book, with figures rounded up and indicative only.
A newly registered tax agent trading through a company, with the licence held in the director's name, asked which limit made sense. Tier 1 meant $250,000. Across six insurers, every $250,000 quote returned on that submission came back higher than a $500,000 quote from a specialist market, which we placed at approximately $650 a year. See the case study.
On a quoting exercise for an accountant in metropolitan NSW who held $250,000 previously, a $500,000 quote came in at approximately $600, the $250,000 quote at approximately $1,100, and $1,000,000 options from approximately $900. The gap between the cheapest option on the table and a $1,000,000 limit was a few hundred dollars.
On our placements, sole practitioners under $75,000 have mostly taken $500,000 or $1,000,000 rather than the $250,000 floor, because the premium step has been small and some client engagement terms specify $1,000,000. Practices with staff or offshore support have generally gone to $1,000,000 or $2,000,000. Our bookkeeper PI cost guide has the premium bands behind those choices.
Two more situations change the answer: adding tax agent services to a BAS practice (see adding tax agent services), and a practice that also does HR or payroll consulting, which some insurers treat as a different occupation and price or refer separately.
Shows the insured name, the limit, the retroactive date and the policy period. Make sure the insured name matches your registration, whether that is you personally or your company.
So the professional services definition can be checked against the services you actually provide (BAS services, bookkeeping, payroll, tax agent services if registered).
Your own note of the figure you used to pick the tier. If turnover crosses into the next tier mid-year, tell us and the limit can be increased by endorsement rather than waiting for renewal.
One structural point: if you are individually registered but only work as an employee, or as a contractor whose work is covered under the principal's policy, and you do not personally charge a fee, the guideline contemplates that you may be covered under that policy. Check that the wording actually extends to your services, and tell the TPB how you meet the requirement.
FREQUENTLY ASKED QUESTIONS
RELATED GUIDES
QUOTE REQUEST
Tell us your expected fee turnover, whether you hold BAS or tax agent registration, and whether you have staff. We will confirm the TPB tier and come back with limit options.
Certificate of currency issued on placement, retroactive date checked against your previous policy, and limit options above the floor so you can see what the next tier actually costs.
Last updated: 05/09/2026