Costs Assessment in Australia: What Lawyers Need to Know About Legal Fee Disputes

April 2026 · 10 min read

Costs assessment is the formal process under Australian law by which an independent assessor reviews a lawyer's bill to determine whether the fees charged are fair and reasonable — and it is the single most important reason why detailed, well-documented billing entries matter. Under the Legal Profession Uniform Law (LPUL), which applies in NSW and Victoria, and equivalent legislation in other states, either a client or a law practice can apply to have legal costs assessed. The assessor examines every line item in the bill against statutory criteria, and any entry that cannot be justified is reduced or disallowed entirely.

According to the Law Society of NSW, costs assessments must be applied for within 12 months of the bill being issued under LPUL ss 198(3) and (4). After that period, leave of the court is required. The Victorian Legal Services Board + Commissioner reports that costs disputes are among the most common complaints received from legal consumers, with billing transparency and inadequate costs disclosure featuring prominently.

For law firms, the practical implication is clear: the quality of your billing entries is your primary defence against costs assessment reductions. Vague entries invite scrutiny. Specific, detailed entries withstand it.

How Costs Assessment Works

The costs assessment process under the LPUL follows a defined sequence. Understanding this sequence helps lawyers prepare bills that are less likely to be challenged and more likely to survive assessment if they are.

Application

Either the client or the law practice lodges an application for costs assessment. In NSW, the application is filed with the Manager, Costs Assessment at the Supreme Court of NSW. In Victoria, applications are made to the Costs Court. Other states have equivalent processes under their own legal profession legislation.

A client can apply for assessment of any bill, whether or not a costs agreement is in place. A law practice can apply for assessment of its own bill — this is sometimes done strategically when the firm expects a client to dispute the bill and wants a formal determination of reasonableness.

Appointment of assessor

An independent costs assessor is appointed. Costs assessors are typically experienced legal practitioners or costs lawyers who specialise in assessing legal fees. The assessor is independent of both the firm and the client.

Assessment process

The assessor reviews the bill line by line. For each entry, they consider whether the work was necessary and appropriate for the matter, whether the time claimed was reasonable for the task described, whether the work was performed at an appropriate level of seniority (partner work versus associate or paralegal work), whether the hourly rate charged was reasonable for the practitioner's experience and the market, and whether the billing description provides sufficient detail to assess reasonableness.

The assessor also considers the costs agreement (if one exists), whether adequate costs disclosure was provided under the LPUL, the complexity and urgency of the matter, the outcome achieved, and any other relevant circumstances.

Determination

The assessor issues a certificate of determination that states the amount of costs found to be fair and reasonable. If the assessed amount is lower than the billed amount, the client is only liable for the assessed amount. If the assessed amount is higher (rare, but possible in party/party assessments), the original bill stands.

What Gets Reduced in Assessment

Costs assessors consistently reduce or disallow certain types of billing entries. Understanding these patterns is essential for firms that want to produce assessment-proof bills.

Vague descriptions

Entries like "Work on matter — 2.0 hours" or "Various attendances — 1.5 hours" are the most common target for reduction. The assessor cannot determine what was done, whether it was necessary, or whether the time claimed was reasonable. Without specificity, the assessor has no basis to allow the full amount and will typically reduce the entry by 30-50% or disallow it entirely.

Excessive time for routine tasks

An entry claiming 1.2 hours (12 units) for "Drafting standard letter to opposing solicitors requesting extension of time" will attract scrutiny because the task — a standard procedural letter — would typically take a competent practitioner 15-30 minutes. The assessor will reduce the time to what they consider reasonable for the task, regardless of how long the lawyer actually spent.

Senior practitioner performing junior work

When a partner bills at $600/hour for tasks that could have been performed by a junior associate or paralegal — basic document filing, routine correspondence, administrative coordination — the assessor may either reduce the time or apply a lower hourly rate. This does not mean partners cannot perform these tasks, but the client should not bear partner-level rates for work that does not require partner-level expertise.

Duplicated work

Multiple practitioners billing for the same activity — two lawyers attending the same meeting without justification, or separate billing by a partner and associate for a task that required only one practitioner — is routinely reduced. The assessor allows the cost of one practitioner unless the firm can demonstrate why both were necessary.

Inadequate costs disclosure

Under LPUL s 174, if a law practice fails to provide adequate costs disclosure before or shortly after being retained, the costs agreement may be void and the client is not required to pay costs until they have been assessed. This is a procedural failure that affects the entire bill, not just individual entries. According to the Law Council of Australia, inadequate costs disclosure is one of the most common grounds for costs assessment applications.

How Detailed Billing Entries Protect Against Reductions

The single most effective defence against costs assessment reductions is billing entry quality. Every entry that goes into a bill should be written as if a costs assessor will read it — because they might.

Compare these two entries for the same piece of work:

Weak entry: "Attending to file — 1.2 hours"

Strong entry: "Attending upon client by telephone and obtaining instructions regarding proposed amendments to shareholders' agreement, including discussion of pre-emptive rights clause at cl 12.3 and drag-along provisions at cl 15.1; preparing file note of instructions — 1.2 hours"

The weak entry will almost certainly be reduced because the assessor cannot determine what "attending to file" means, whether it required 1.2 hours, or whether it was necessary work. The strong entry is defensible because it identifies the specific task (telephone conference), the specific topics discussed (two identified clauses), the follow-up work (file note), and the total time is consistent with the scope of work described.

AI billing tools like LexUnits generate entries at the "strong entry" level of detail automatically. When a lawyer uploads a meeting recording or email chain, the AI produces entries with specific descriptions that identify what was done, who was involved, and what topics were covered. This level of detail is precisely what costs assessors look for when determining whether an entry represents fair and reasonable costs.

The Costs Agreement Factor

A valid costs agreement under LPUL s 180 provides significant protection in costs assessment. If the costs agreement clearly sets out the hourly rates, the basis of charging, and the estimated total costs, the assessor will generally give weight to the agreed rates unless they are manifestly excessive.

However, a costs agreement does not make a bill immune from assessment. The assessor can still examine whether the work billed was necessary, whether the time claimed was reasonable, and whether the costs agreement was entered into with informed consent (which requires adequate costs disclosure). A firm that has a valid costs agreement but produces vague billing entries is still vulnerable to reductions on the reasonableness of individual entries.

Party/Party Costs vs Solicitor/Client Costs

There are two distinct types of costs assessment, and the standard applied in each differs.

Solicitor/client assessment examines whether the costs charged by a lawyer to their own client are fair and reasonable. This is the more common type of assessment and applies the "fair and reasonable" standard. The assessor considers all circumstances including the costs agreement, the complexity of the work, and the result achieved.

Party/party assessment examines costs that a losing party has been ordered to pay to the winning party after litigation. This applies a narrower standard — typically "necessary and proper" or "reasonable" — and generally results in a lower assessed amount than the actual solicitor/client costs. The gap between what the winning party was charged by their own lawyer and what they recover from the losing party is known as the "indemnity gap."

For billing purposes, the implication is that entries must be detailed enough to satisfy both standards. An entry that survives solicitor/client assessment may still be reduced in party/party assessment if the assessor considers the work was not strictly necessary for the conduct of the litigation.

Practical Steps to Reduce Assessment Risk

Provide costs disclosure early. Issue the costs disclosure notice before or immediately after being retained, not weeks later. Use the standard form required by your jurisdiction. LexUnits can generate costs disclosure notices (Section 62 notices) from your input in minutes.

Write specific billing descriptions. Every entry should identify the specific task, the specific matter or issue addressed, and any documents or people involved. Avoid generic language like "various attendances" or "work on matter."

Record time contemporaneously. Entries recorded on the day the work was done are more credible than entries reconstructed from memory days or weeks later. AI billing tools that generate entries from recordings and documents help ensure contemporaneous capture.

Match seniority to task. Assign work to the appropriate level of practitioner and bill at the corresponding rate. If a partner performs routine work, consider billing at a reduced rate or assigning the work to a junior practitioner.

Avoid block billing. Do not combine multiple tasks into a single time entry with a single time allocation. Each distinct task should be a separate entry with its own time. Block billing makes it impossible for the assessor to evaluate the reasonableness of individual tasks.

What is a costs assessment in Australian law?

A costs assessment is a formal process under the Legal Profession Uniform Law where an independent costs assessor reviews a lawyer's bill to determine whether each entry represents fair and reasonable costs. Either the client or the law practice can apply. The assessor examines every line item against criteria including necessity, time reasonableness, practitioner seniority, and the complexity of the work. Entries that cannot be justified are reduced or disallowed.

How long do I have to apply for a costs assessment in NSW?

Under LPUL ss 198(3) and (4), applications for costs assessment must be made within 12 months of the bill being issued or the request for payment being made. After 12 months, you need leave of the court, which is only granted in exceptional circumstances. This time limit applies to both client applications and law practice applications.

How do detailed billing entries protect against costs assessment reductions?

Costs assessors evaluate whether each entry is necessary, reasonable in duration, and performed at an appropriate seniority level. Vague entries like "Various work on matter" give the assessor no basis to determine reasonableness and are routinely reduced by 30-50%. Specific entries that describe the exact task, the topics covered, and the documents involved are far more defensible because the assessor can evaluate each element independently.

Last verified: April 2026. Costs assessment procedures vary by state and territory. This article discusses the process under the Legal Profession Uniform Law (NSW and Victoria). Other jurisdictions have equivalent but potentially different procedures. This article is for general informational purposes and does not constitute legal advice.