Risks of Using an Unregistered Bookkeeper

Let me be direct: if your bookkeeper or BAS agent isn't registered, you're at risk. Not maybe — absolutely. The question isn't whether something will go wrong, it's when, and how much it will cost you.

What does "registered" mean?

A registered BAS agent or bookkeeper is someone who has met specific qualifications and ongoing professional development requirements set by the ATO. They have:

• Completed formal training and education in bookkeeping, tax compliance, and BAS management
• Passed accreditation exams
• Agreed to follow a Code of Professional Conduct
• Committed to ongoing continuing professional education (CPE)
• Professional indemnity insurance
• Accountability to the ATO if they breach standards

An unregistered bookkeeper or BAS agent? They might know how to open Xero and enter transactions. That's not the same thing.

Why the training matters

Bookkeeping and BAS compliance aren't simple data entry. They require knowledge of:

• Tax law — what's deductible, what's not, how to structure claims correctly
• GST rules — registration thresholds, input tax credits, exempt supplies
• PAYG withholding — requirements, calculations, penalties for getting it wrong
• Record-keeping requirements — what you need to keep, for how long, in what format
• ATO compliance — how the ATO interprets the rules, what triggers audits

All of this is constantly changing. Registered bookkeepers have to do ongoing training to stay current. Someone who just learned Xero three years ago? They don't automatically know the updates that happened since.

The real risks

1. BAS and GST claims done incorrectly

This is the most common issue I see. An unregistered bookkeeper might claim GST on things that aren't claimable, or miss legitimate claims entirely. They might not understand the nuances of input tax credits or mixed-use expenses.

Result: You either overpay or you face an ATO audit where they pick you apart, reassess your BAS, and charge you back taxes plus penalties and interest.

2. Deductions that won't survive an audit

I've seen unregistered bookkeepers help clients claim things that are clearly personal, disguise personal expenses as business ones, or just not understand which expenses are actually deductible in their industry.

The ATO is increasingly sophisticated with data matching. They know typical deduction patterns by industry. If yours are wildly wrong, you'll get picked for audit. And an audit costs thousands in professional fees to fix, regardless of whether you actually owe anything.

3. Record-keeping that isn't compliant

The ATO has specific requirements for how you must keep records. Documentation, timing, format — it all matters. An unregistered person might keep records in a way that seems fine to them but isn't actually compliant with ATO requirements.

If you get audited and your records don't meet the standard, the ATO can disallow entire deductions or rebuild your return based on their estimates (which are rarely in your favour).

4. PAYG withholding mistakes

If you have employees or contractors, PAYG withholding is critical. Miss it or get the calculations wrong, and you're personally liable as a director or business owner. This isn't something that's okay to get a bit wrong.

An unregistered bookkeeper might not understand varying withholding rules, tax-free thresholds, or how to handle special situations. The ATO won't care that you didn't know better — they'll chase you for the debt.

5. Liability when things go wrong

If a registered bookkeeper or BAS agent makes a mistake, they have professional indemnity insurance. They can be held accountable by the ATO. You have recourse.

With an unregistered person? If they make a mistake and disappear, or if they just refuse responsibility, you're stuck. You still have to fix it with the ATO, but you have no claim against the person who caused the problem.

But what if they're really good?

Here's the thing: maybe they are really good. Maybe they know heaps about bookkeeping and get everything right. But you still have no way to verify that they're compliant with ATO requirements, no professional indemnity insurance to fall back on if they're wrong, and no ability to hold them accountable.

It's like having an unlicensed electrician. They might do brilliant work. But if something goes wrong and there's a fire, you're liable, and they have no insurance. Is saving money upfront worth that risk?

How to check if someone is registered

It's easy. Ask for their registration details. A registered BAS agent should be able to give you:

• Their registration number with the relevant body (usually through a professional accounting body)
• Details of their professional indemnity insurance
• Evidence of their CPE commitment

If they can't or won't provide this, that's your answer. And you should find someone else.

The long view

I know unregistered bookkeepers often charge less. The upfront saving might be 20-30% cheaper than a registered professional. But when you add up the risks — audit costs, back taxes, penalties, interest, and the stress of knowing you might be non-compliant — the "saving" evaporates immediately.

It's much cheaper to get it right the first time than to fix it after the ATO asks questions.

Common questions