Legal retainers in Australia, how they work and what to check before you sign

If your business has needed a lawyer twice in the same quarter, you have probably heard the word "retainer". It gets used for everything from a monthly subscription to legal advice, to an upfront deposit the firm holds against future work, to a package that covers a specific project and the follow-up advice afterwards. The word is doing a lot of work, and the arrangement behind it matters more than the label.

A retainer is, at bottom, the engagement between your business and a law firm, and in Australia that engagement sits inside a regulatory framework designed to protect you as the client. This article walks through how that framework actually works: who owes what to whom, how your money moves through the firm's trust account, what the firm is legally required to tell you about costs, what a costs agreement can and cannot do, the retainer models you will be offered, and how you get out of the arrangement if it stops suiting you.

What a retainer actually is

In Australian practice, a retainer is the contract under which a lawyer agrees to act for a client. The term appears in the legislation itself: when a costs dispute is assessed, one of the factors in deciding whether fees are "fair and reasonable" is the retainer and the instructions given in the matter (s 172(2)(f) of the Legal Profession Uniform Law (NSW), the Uniform Law).

In the commercial world, though, the word is used for three different structures:

Ongoing service plan: a recurring fee, usually monthly, for access to advice and a defined amount of work.
Trust deposit: money paid upfront, held by the firm, drawn down against invoices as work is completed.
Scope package: a set fee covering a defined piece of work, sometimes with an ongoing support component afterwards.

The legal mechanics underneath all three are the same, and that is what the rest of this article covers.

Who does what in a retainer arrangement

Four parties have a hand in how a retainer runs:

Your business (the client): gives instructions, pays the bills, and holds statutory rights, including the right to costs disclosure, the right to a negotiated costs agreement, the right to an itemised bill, and the right to challenge costs.
The law practice: must make disclosure, must hold your money in a trust account until it is earned, must charge no more than fair and reasonable costs, and must not inflate costs unnecessarily.
The regulator: under the Uniform Law, the designated local regulatory authority handles costs disputes and complaints. In New South Wales that role is split between the Law Society Council, the Bar Council and the NSW Commissioner for Uniform Legal Services Regulation.
Costs assessors and courts: an assessor reviews whether a disputed bill is fair and reasonable, and courts enforce costs agreements and resolve disputes that arise when a retainer ends.

The rulebook differs slightly depending on where the firm sits. The Uniform Law took effect in New South Wales and Victoria on 1 July 2015 and has since been adopted in Western Australia and other states and territories. Queensland runs its own regime under the Legal Profession Act 2007 (Qld), which imposes parallel disclosure and billing obligations. If you deal with firms across state lines, the practical duties are similar everywhere, but the precise provisions differ.

How the money moves: trust accounts and drawdown

The single most important mechanical detail is that advance payments are not the firm's money.

Under s 129 of the Uniform Law, "trust money" includes money received by a law practice on account of legal costs in advance of providing the services. That money must be deposited into the firm's general trust account as soon as practicable after it is received (s 137), and while it sits there the firm must hold it exclusively for you and may only disburse it in accordance with your direction (s 138).

The drawdown happens when work is billed. Money stops being trust money once legal services have been provided and a bill has been given (s 129(2)(a)). The firm can then withdraw it from the trust account to its own account, but only in accordance with the procedures in the Uniform Rules (s 144), which in practice means by reference to the bill and the terms of the costs agreement.

What this means for your business:

An upfront retainer is protected money: The firm cannot touch it until it has done the work and billed you for it.
Invoices should show the drawdown: Your statement should let you see the running balance of what has been used.
The leftover should come back to you: When the retainer ends, any unused balance is refundable unless the agreement says otherwise, so the refund mechanism is worth confirming in writing before you pay.

What your lawyer must tell you before you commit

Costs disclosure is a statutory obligation, not a courtesy. Under s 174 of the Uniform Law, a law practice must, when or as soon as practicable after instructions are initially given in a matter, provide the client with information disclosing the basis on which legal costs will be calculated and an estimate of the total legal costs. It must also tell you about any significant change to what was disclosed as the matter progresses, and the disclosure must be in writing.

The disclosure must also set out your rights:

to negotiate a costs agreement with the firm,
to negotiate the billing method,
to receive a bill and to request an itemised bill after receiving one that is not itemised,
to seek help from the local regulator if there is a dispute about costs.

Two thresholds soften the obligation for small matters. Disclosure can be dispensed with where the total costs are unlikely to exceed $750 (excluding GST and disbursements), and a shorter standard disclosure form can be used where costs are unlikely to exceed $3,000. Anything a business retainer realistically covers will attract the full written disclosure. Queensland's Act works the same way in substance: s 307B allows an abbreviated disclosure for smaller matters, and s 316 provides that if the firm fails to disclose, the client need not pay until the costs have been assessed.

Non-compliance carries real teeth. Under s 178 of the Uniform Law, if a law practice contravenes the disclosure obligations, the costs agreement is void, the client is not required to pay the costs until they have been assessed, and the firm cannot start recovery proceedings until an assessment happens. A firm that took reasonable steps and fixes the failure within 14 days can be excused in some circumstances, but the default position strongly favours the client.

The costs agreement: paperwork that binds both sides

You have a statutory right to require and to negotiate a costs agreement with your lawyer (s 179). A costs agreement must be written or evidenced in writing (s 180(2)), so a handshake and an invoice will not do. Once in place, it is enforceable in the same way as any other contract (s 184).

Points worth understanding before you sign:

Conditional costs agreements: no win, no fee arrangements must be in writing and in plain language, must be signed by the client, and must carry a cooling-off period of at least five clear business days (s 181).
The agreement cannot remove your protection: Section 180(4) provides that a costs agreement cannot state that the costs are not subject to a costs assessment.
The agreement is where scope lives: if it says "general business legal advice", ask what that includes in practice: quick questions by email or phone, contract reviews up to a page limit, drafting and redrafting, negotiation support, letters and dispute work. If scope is vague, expectations on both sides will drift.

Fair costs, bills and the consequences of getting it wrong

Even with a signed costs agreement, the firm's charging is capped by statute. A law practice must charge no more than fair and reasonable costs, proportionate and reasonable in amount (s 172(1)). The fairness test looks at the skill and seniority of the lawyers, the complexity of the matter, the labour and responsibility involved, the urgency and time spent, and the quality of the work. The firm is also required not to act in a way that unnecessarily increases your costs (s 173).

If you think a bill is wrong:

Ask for an itemised bill: You are entitled to one, and it forces the firm to justify what it has charged.
Raise the dispute with the firm first: Most billing disagreements are resolved by a conversation.
If that fails, seek a costs assessment: An independent assessor reviews whether the bill is fair and reasonable, and non-disclosure may mean the bill has to be assessed before it is even payable.
Remember the retainer itself is part of the test: because the retainer and the instructions are a factor in the assessment (s 172(2)(f)), a vague retainer letter makes a bill harder to defend, for both sides.

The retainer models you will be offered

Four structures dominate what Australian firms actually offer small businesses:

Monthly subscription: a fixed monthly fee for a defined level of support, such as a set number of hours, quick questions by email or phone, and standard contract reviews. It suits businesses with a steady flow of small to medium legal tasks. Watch for what happens to unused hours and what counts as included work rather than additional work.
Upfront trust deposit: a lump sum paid in advance, held in trust and drawn down against invoices. It suits a specific project, such as a complex negotiation, where you want work to start without waiting on invoice cycles. Confirm whether the unused balance is refundable and on what timeframe.
Fixed-fee project with ongoing support: a defined project, such as a contract suite or employment pack, with a retainer component for advice after the project goes live. It suits a business scaling up that wants foundations built and then maintained. Clarify where the project ends and the retainer begins.
On-call general counsel: an outsourced legal function covering advice, strategy, risk management and negotiations. It suits fast-growing businesses with recurring needs across contracts, employment and compliance. It is the hardest to scope, so the boundaries and escalation paths need to be explicit.

None of these is inherently better than the others. The right choice depends on how predictable your legal needs are, which is a question a lawyer can help you answer.

Ending a retainer

The Uniform Law does not set out termination rules for retainers. Ending the relationship is governed by the costs agreement and the general law, so the agreement is where you should look for the exit terms.

As a client you can generally end a retainer at any time, but you remain liable for work properly done up to that point, and the firm may hold a lien over your file until its outstanding costs are dealt with. A firm's ability to end the retainer is more constrained: it can generally do so only in limited circumstances, such as a conflict of interest arising, or where the client has not paid and the firm has given proper notice.

Termination is where relationships get messy, and the courts see it often. In Sithakoul v Su [2022] NSWSC 132, a client who had already changed firms several times terminated her retainer mid-litigation, and the dispute over her former solicitor's file, unpaid costs and the solicitor's lien ended up in the Supreme Court.

Three things are worth pinning down before you sign, because they become negotiation points at exactly the wrong time if they are missing: the notice period to cancel, what happens to unused trust money, and the handover process for your files.

Pitfalls worth negotiating out before you sign

Most retainer disappointments trace back to the same handful of omissions:

Scope creep: "general business advice" expands to fill whatever space the agreement gives it. Ask for a written list of included tasks and excluded work, such as court appearances, specialist counsel and litigation.
Use-it-or-lose-it hours: some monthly retainers expire unused hours at the end of the period. Decide whether that suits you or whether unused hours should roll over.
Approval before additional work: agree in writing that the firm will seek your approval before exceeding a cap or starting work outside the scope, rather than discovering the overrun on the invoice.
Disbursements and GST: confirm which out-of-pocket costs are charged on top and at what margin, so the monthly figure is not a surprise.
Who does the work: a retainer sold by a partner might be delivered by a junior. Ask who handles day-to-day matters and how escalation works for urgent or complex issues.
Turnaround times: for a business, response times are part of the value. If the agreement is silent on them, agree expectations for quick questions, contract mark-ups and urgent matters.

Getting a lawyer to look at the retainer before you sign

A focused review of a retainer agreement and its costs disclosure is a modest, usually fixed-fee piece of work, and it is the cheapest insurance you will buy against a year of billing surprises. A practitioner will check that the disclosure meets the statutory requirements, test whether the scope matches the work you actually have coming, flag the items above that are missing, and explain the trust account and drawdown mechanics as they apply to your deposit.

They can also negotiate on your behalf. Retainer terms are rarely take-it-or-leave-it, and firms expect scope, caps and renewal terms to be discussed. Getting the terms right at the start costs far less than unpicking an ill-fitting retainer after a dispute has started.

What certainty should look like before you sign

The value of a retainer sits in two places: the scope definition and the money mechanics. If a firm cannot answer plainly what is included, what draws down from the trust account, and what happens to unused money if you leave, then the retainer is not doing its job, no matter how attractively the monthly fee is pitched.

A retainer is meant to remove friction from getting legal help, so that you call early rather than late. Before you commit, you should be able to answer one question with confidence: for this fee, what exactly am I buying, and what happens to my money if it does not work out? If you cannot get that answer in plain English from the firm, get a short second opinion before you sign. It will usually cost less than you expect, and it may save you from a retainer that creates the very uncertainty it was meant to remove.