Law Firm Bookkeeper Sydney: Office Account, WIP and Profit

Law Firm Bookkeeper Sydney: The Office Account, WIP, and Why Nobody's Bookkeeper Belongs in Your Trust Account

Your firm bills $2.4M, your lawyers are flat out, and you still cannot answer the only question that matters: which matters actually make money. Meanwhile the last bookkeeper treated your office account like a shoebox and your WIP report like a rumour.

To have this handled on a fixed monthly fee, see law firm bookkeeping on a fixed fee.

What we do for law firms. We run the office account: bookkeeping, payables, payroll, BAS and monthly reporting in Xero. We do not administer trust accounts or work inside practice management software. Trust accounting stays with your trust accountant and external examiner, and we work alongside them. Barry might offer to "have a look" at your trust ledger. We won't, and you should be nervous of anyone who does.

Published: June 2026

Updated: November 2026

‍

What does a law firm bookkeeper actually do?

A law firm bookkeeper runs the general (office) account side of the practice: bookkeeping, payables, payroll, BAS preparation, and the monthly reporting that tells the partners what the firm actually earned. The legal practice management software and the strict trust accounting regime that sits over the top of it stay with the firm and its trust accountant.

That distinction is the whole game. As general information: trust money is not the firm's money. It is governed by the Legal Profession Uniform Law and its rules in NSW, supervised by the Law Society of NSW, with prescribed records, receipting requirements and an annual external examination by an approved examiner. An office account bookkeeper does not "do" your trust account, and any bookkeeper who breezily offers to should make you very nervous. What a good one does do is record every transfer that lands in the office account accurately and on time, so the office side is never the reason your trust accountant has to chase anything.

‍

The three messes we see in Sydney law firm files

1. Disbursements vanishing into the void

Counsel's fees, filing fees, searches, expert reports. The firm pays them, and then one of two things happens in a Barry file: they get expensed and never on-billed, or they get on-billed with the wrong GST treatment. A mid-size Sydney firm leaking even 2% of disbursements unrecovered is quietly donating tens of thousands a year to its own clients. The fix is boring and structural: every disbursement coded to a matter at the moment it is paid, a monthly unbilled disbursements report, and a hard rule that nothing ages past 60 days without a decision.

2. WIP as fiction

Work in progress is the firm's inventory. If timesheets are recorded but never valued, never aged, and never reviewed against what was actually billed, the partners are flying on vibes. The pattern we see: a firm "earning" $200K a month in recorded time while banking $140K, with nobody able to say whether the gap is write-offs, slow billing, or a partner who has not raised an invoice since Mardi Gras. A monthly WIP lockup report (WIP days plus debtor days) is the single most useful number a firm this size can look at, and it takes a competent bookkeeper about an hour to produce once the file is structured properly.

3. The office account reconciliation that "mostly" balances

"Mostly" is doing a lot of work in that sentence. Costs transferred into the office account should match the invoices they relate to, exactly, with a clean paper trail. When the office ledger drifts from the firm's own matter records, year-end becomes an archaeology project. We reconcile the office account in Xero every week and flag any receipt we cannot match to an invoice, so the firm and its trust accountant can clear it while it is fresh, not in a forensic exercise in September.

‍

Worked example: the $2.4M firm that thought it was fine

Take a hypothetical eight-lawyer Surry Hills firm doing $2.4M. Average billing rate respectable, everyone busy, profit underwhelming. A proper file rebuild surfaces the usual suspects: $38,000 of unrecovered disbursements across 14 months, debtor days at 71 because invoices went out whenever someone remembered, and two practice areas where the effective recovery rate was under 60% of recorded time while the partners believed it was 85%. None of that is exotic. All of it is invisible without monthly matter-level reporting, and all of it had been sitting in plain sight while the previous bookkeeper sent quarterly PDFs nobody could read. The same dynamics show up in our agency clients: busy, profitable on paper, quietly leaking.

‍

What the engagement looks like

Monthly, fixed price, built around the firm's existing setup. Xero on the office account, sitting alongside whichever practice management system the firm runs (LEAP, Smokeball, Actionstep or similar). We do not work inside that system. Weekly reconciliation of the office account, bills loaded for the firm to release, payroll run and reviewed, disbursements coded as they are paid, and a monthly management pack with debtor days and the WIP and practice-area figures the firm exports from its own system. BAS prepared and lodged each quarter by a registered BAS Agent, with the GST treatment of disbursements handled correctly rather than hopefully.

For the trust account, the firm's obligations stay with the firm, its trust accountant and its external examiner, exactly as the Uniform Law intends, and we work alongside them. Their job is the trust ledger. Ours is an office account so clean nobody has to ask about it twice.

On pricing: a firm between $1M and $5M in fees should expect a fixed monthly fee, scoped in writing, with no hourly surprises. The full breakdown of market rates is in how much a Sydney bookkeeper should cost in 2026, and the questions worth asking before signing anything are in what to ask a new Sydney bookkeeper.

‍

Signs your current setup is failing the firm

You get a P&L quarterly, as a PDF, with no matter or practice-area split. Nobody can tell you unbilled WIP as at today. Disbursement recovery is a shrug. Office-side receipts get matched to invoices once a year, under duress, in September. Emails take a week and the reply bills you for the privilege. If three or more of those land, the longer diagnostic is 13 signs your bookkeeper is secretly Boring Barry, and the escape route is how to change your Sydney bookkeeper without it getting weird.

Or skip straight to evidence: a Free Xero Roast of your office account file will tell you in one page what state it is really in.

‍

Firms based in the city can also see our CBD bookkeeper for Sydney firms page.

FAQ

Can a bookkeeper manage a law firm trust account in NSW?

‍No, not from us. As general information, trust accounting in NSW is governed by the Legal Profession Uniform Law, with prescribed records and an annual external examination, and responsibility sits with the law practice. We do not administer trust accounts. Trust accounting stays with your trust accountant and external examiner, and we keep the office account clean alongside them. Be wary of anyone who offers to take the trust account off your hands casually.

What software should a Sydney law firm run?

‍Most small to mid firms run a legal practice management system (LEAP, Smokeball, Actionstep or similar) for matters, time and trust, with Xero handling the office account, payroll and BAS. We work in Xero only. The practice management system and the trust records stay with the firm and its trust accountant.

How much should a law firm bookkeeper cost in Sydney?

‍For a firm with staff, expect a fixed monthly retainer scoped to transaction volume, payroll headcount and reporting needs, rather than an hourly rate. Hourly billing for bookkeeping has the same pathologies as hourly billing for legal work, except with less excuse.

What is WIP lockup and why does it matter?

‍Lockup is the cash tied up in unbilled WIP plus unpaid debtors, usually expressed in days. It is the best single measure of how quickly the firm turns work into money. High lockup is the most common reason profitable firms feel broke.

How is GST handled on disbursements?

‍It depends on whether the disbursement is incurred as agent for the client or as a cost of the firm's own supply, and the treatment differs. It is a known trap area, which is why disbursement coding needs a consistent documented policy rather than guesswork. Specific treatment for your firm is a question for your tax adviser.

Can you work with our existing accountant?

‍Yes. The division of labour is standard: we keep the file clean and current all year, your accountant handles tax returns and structuring. Accountants generally love inheriting a clean file, because the alternative is billing you to fix ours.

Which Sydney firms is this for?

‍Firms with staff, roughly $800K to $10M in fees, across the inner city and suburbs. Sole practitioners are welcome to read along, but the economics of a monthly engagement work best once there is payroll and volume.

‍

About Sydney Bookkeeper

Sydney Bookkeeper is the modern, fixed-price Sydney bookkeeper for businesses with staff that are tired of slow, hourly, jargon-spouting incumbents. We work with professional services firms, construction and property businesses, agencies, tech and ecommerce companies, hospitality groups, and health practices across Sydney. Monthly bookkeeping, BAS lodgement, payroll, and Xero file cleanups, all on fixed monthly pricing, no lock-in.

Visit Sydney Bookkeeper | Get a Free Xero Roast | Book a Chat

The team uses a registered BAS Agent for all BAS and IAS lodgement services. Full registration details, agent particulars, and copies of the Tax Practitioners Board (TPB) Code of Professional Conduct, the TPB complaints process, and any conditions on the agent's registration are available on request by emailing hello@sydneybookkeeper.com. This content is general information only, written for Australian small and mid-market businesses. It does not constitute tax, financial product, or legal advice and should not be relied on as such. Tax obligations depend on your individual circumstances. For advice specific to your business, contact the team directly or consult a registered tax agent or licensed financial adviser. Sydney Bookkeeper is not a licensed tax agent or licensed financial adviser. Information was current at the time of publication and may change without notice. We review and update guides periodically.

Sources