GST on Legal Fees in Australia: What Lawyers and Clients Need to Know

GST on legal fees sounds straightforward — add 10% to your invoice and move on. In practice, it's anything but. Between GST-inclusive and GST-exclusive quoting, disbursements that sometimes attract GST and sometimes don't, Tax Invoice requirements that trip up even experienced practitioners, and practice management systems that each handle GST differently, there's plenty of room for errors that cost real money.

This guide covers the GST rules that matter most for Australian lawyers and their clients — clearly, practically, and without the jargon that makes tax law harder than it needs to be.

When Do Lawyers Charge GST?

The short answer: if your law firm is registered for GST, you must charge GST on your professional fees. Under the A New Tax System (Goods and Services Tax) Act 1999, legal services are a taxable supply.

GST registration is compulsory for any business with an annual turnover of $75,000 or more. The vast majority of law firms — from national firms to suburban two-partner practices — exceed this threshold and are GST-registered. This means virtually every invoice a client receives from a law firm will include a GST component.

The exceptions are rare but worth noting:

• Sole practitioners or barristers under the threshold: A barrister with annual fees below $75,000 is not required to register for GST and will not charge it. This is uncommon for practising barristers but does occur, particularly for those in the early stages of practice or working part-time.
• Voluntary registration: Some practitioners below the threshold voluntarily register for GST to claim input tax credits on their own expenses. If they're registered, they charge GST regardless of their turnover.

Clients can verify whether their lawyer is GST-registered by searching the ABN on the Australian Business Register. If the ABN shows "GST: Yes", expect GST on the bill.

GST-Inclusive vs GST-Exclusive: Why It Matters

This is where confusion starts — and where clients sometimes feel misled.

GST-exclusive means the quoted fee does not include GST. A fee quote of $5,000 GST-exclusive will become $5,500 on the invoice once the 10% GST is added.

GST-inclusive means the quoted fee already includes GST. A fee quote of $5,500 GST-inclusive means $5,000 goes to the firm and $500 is the GST component.

Most Australian law firms quote fees on a GST-exclusive basis in their costs agreements, then show the GST as a separate line item on invoices. This is standard industry practice, but it can catch clients off guard if they assumed the quoted figure was the total they'd pay.

Australian Consumer Law requires that prices displayed to consumers must be GST-inclusive. However, in the business-to-business context where most legal services operate — and especially in costs agreements where both parties are commercially sophisticated — GST-exclusive quoting is common and generally accepted.

Best practice: Always state clearly in your costs agreement and fee estimates whether amounts are GST-inclusive or GST-exclusive. A single sentence — "All fees quoted in this agreement are exclusive of GST" — prevents disputes and builds trust.

GST on Disbursements: The Complicated Part

Disbursements are where GST gets genuinely tricky. Not all disbursements attract GST, and the rules depend on the nature of the expense and whether the supplier is GST-registered.

Disbursements That Are Typically GST-Free

• Court filing fees — government fees are generally GST-free
• ASIC search fees — a government charge, no GST
• Land Registry and title search fees — state government charges, GST-free
• Stamp duty — a state tax, not subject to GST
• Barrister fees (if the barrister is not GST-registered) — no GST applies

Disbursements That Typically Include GST

• Courier and postage fees (from GST-registered providers)
• Expert witness fees (if the expert is GST-registered)
• Process server charges
• Photocopying and printing charges (if outsourced to a GST-registered provider)
• Barrister fees (if the barrister is GST-registered — which most are)

The distinction matters because it affects how you treat the disbursement on your Tax Invoice. If you pay a GST-inclusive disbursement on behalf of a client, you can claim an input tax credit for the GST component and must then charge GST when you pass the cost through to the client. For GST-free disbursements passed through at cost, no GST is added.

Getting this wrong creates real problems. Overcharging GST on a GST-free disbursement means collecting tax you shouldn't, which creates an ATO liability. Failing to charge GST on a taxable disbursement means absorbing the cost yourself.

Tax Invoice Requirements

Every GST-registered law firm must issue a valid Tax Invoice for their services. Without one, business clients cannot claim input tax credits — which means your invoice is costing them more than it should.

A valid Tax Invoice must include:

• The words "Tax Invoice" (prominently displayed)
• The law firm's identity — name (or trading name) and ABN
• The date of issue
• A description of the legal services supplied
• The GST amount for each line item, or a statement that the total price includes GST
• The total amount payable

For invoices totalling more than $1,000 (which is most legal invoices), you must also include the client's identity — their name or ABN.

Common mistake: Issuing an invoice that says "Invoice" instead of "Tax Invoice." This small omission means the document is not a valid Tax Invoice under the GST Act, and the client's accountant may reject it for input tax credit purposes.

ABN and GST Registration: The Basics

Every law firm operating as a business in Australia needs an Australian Business Number (ABN). The ABN is separate from GST registration — you can have an ABN without being registered for GST, but you cannot be GST-registered without an ABN.

The GST registration threshold is $75,000 in annual turnover. Once your firm's turnover reaches this level, you must register within 21 days. For most law firms, this happens well before the end of their first year of practice.

If a lawyer does not have an ABN or is not GST-registered, the paying entity may be required to withhold 47% from payments under the "no ABN withholding" rules. This is most relevant for barristers and contract lawyers who invoice firms directly.

Displaying GST in Billing Entries

How you display GST in your time entries and invoices depends partly on your firm's practice and partly on your practice management system. There are two common approaches:

Approach 1: GST-exclusive rates with GST calculated at invoice level. Each time entry shows the fee exclusive of GST (e.g., 1.0 hours at $400/hr = $400.00). The GST is then calculated as a total at the bottom of the invoice. This is the most common approach and the one used by most practice management systems by default.

Approach 2: GST shown per line item. Each entry shows the GST-exclusive amount and the GST component separately. This is more transparent but creates longer, more complex invoices. Some government and corporate clients require this format.

Whichever approach you use, the total GST on the invoice must be clearly stated, and the invoice must meet the Tax Invoice requirements described above.

How Different Practice Management Systems Handle GST

If you've ever migrated between practice management systems — or tried to import billing data between them — you'll know that GST handling is one of the areas where they diverge most. Here's how the four main Australian systems differ:

Actionstep

Actionstep uses standard GST terminology. Time entries are recorded at GST-exclusive rates, and you can configure matter-level GST settings. Invoices show GST as a separate line at the bottom. Actionstep handles both taxable and GST-free supplies and lets you set the GST status per disbursement type.

LEAP

LEAP has a notable quirk: it uses the term "GST Exclusive" where other systems use "GST Free." This catches out lawyers who move from other platforms. In LEAP, marking a disbursement as "GST Exclusive" means no GST will be charged on it — it's LEAP's way of saying the item is GST-free. The terminology is counterintuitive, and it's one of the most common sources of GST errors when importing data into or out of LEAP.

Clio

Clio, being a global platform, handles GST through its tax configuration settings. You can set up Australian GST as a tax rate and apply it to activities and expenses. Clio allows per-line-item tax settings, which gives flexibility but requires careful setup to ensure disbursements are taxed correctly. The system supports both tax-inclusive and tax-exclusive display modes.

Smokeball

Smokeball is deeply integrated with Australian tax requirements. It applies GST automatically based on the activity type and allows you to configure GST treatment at the matter template level. Smokeball's invoicing engine generates Tax Invoices that meet ATO requirements out of the box, including the correct display of GST on professional fees and disbursements.

Migration tip: When moving billing data between systems, always verify the GST treatment of every disbursement type. What's coded as "GST Free" in one system may need to be mapped to "GST Exclusive" in another — and getting this wrong means incorrect invoices.

Frequently Asked Questions

Do all lawyers charge GST?

Not all lawyers charge GST. Only lawyers or law firms registered for GST are required to add GST to their fees. Under Australian tax law, businesses with an annual turnover of $75,000 or more must register for GST. Most established law firms exceed this threshold. However, some sole practitioners or barristers with turnover below $75,000 may not be registered and will not charge GST. You can verify a lawyer's GST registration status by checking their ABN on the Australian Business Register.

Is GST charged on disbursements?

It depends on the type of disbursement. Disbursements that are themselves subject to GST — such as courier fees, expert witness fees from GST-registered providers, or process server charges — will include GST. However, many common legal disbursements are GST-free, including court filing fees, ASIC search fees, Land Registry fees, and stamp duty. The key is to check whether the supplier of the disbursement is GST-registered and whether the supply itself is taxable.

What's the difference between GST-inclusive and GST-exclusive billing?

GST-inclusive billing means the quoted fee already includes the 10% GST component — a fee of $550 GST-inclusive is $500 plus $50 GST. GST-exclusive billing means GST will be added on top — a fee of $500 GST-exclusive becomes $550 after GST. Most Australian law firms quote on a GST-exclusive basis and show GST separately on invoices. The critical thing is to state clearly in your costs agreement which basis you're using, so clients know what to expect on the final bill.

What must a Tax Invoice include for legal services?

A valid Tax Invoice must include: the words "Tax Invoice", the law firm's name and ABN, the date of issue, a description of the legal services provided, the total amount payable, and the GST amount. For invoices over $1,000, it must also include the client's name or ABN. Without a valid Tax Invoice, business clients cannot claim input tax credits for the GST paid on your fees.