Law Firm Bookkeeping: Chart of Accounts, Client Cost Advances, and Monthly Close

Law firm bookkeeping fails when the books are set up like a generic service business. A law firm has two bank accounts that serve different purposes (operating and trust), revenue that is earned at a different time than it is billed and collected, client costs that are advanced by the firm and reimbursed later, and work-in-progress that represents unbilled time with real economic value. The chart of accounts must reflect all of this, or the financial statements will not tell the partners how the firm is actually performing. The monthly close is where most firms fall apart: without a disciplined process for reconciling the trust account, writing off stale WIP, and matching revenue to the period it was earned, the year-end financials are a reconstruction project rather than a reporting event.

How should the chart of accounts be structured?

The chart of accounts for a law firm organizes the books around three pools: the operating account (firm money), the trust account (client money), and the work-in-progress (time earned but not yet billed).

Revenue accounts: Separate by fee structure. Hourly Fee Revenue, Flat Fee Revenue, Contingency Fee Revenue, Mediation/Arbitration Revenue, and Other Revenue. Separating fee types allows the partners to see which billing models are most profitable and which are consuming time without adequate return. If the firm operates in multiple practice areas, sub-accounts by practice area (litigation, real estate, corporate, estate planning) provide additional visibility.

Cost of services / direct costs: Paralegal and associate salaries (if tracked as direct costs rather than overhead), contract attorney fees, expert witness fees, court reporter fees, filing fees, and other direct case costs that are not advanced on behalf of the client. Some firms track these as expenses; others capitalize them as WIP until the case resolves (common in contingency practices).

Client cost advances (asset account): Costs paid by the firm on behalf of a client that the client is obligated to reimburse. Filing fees, deposition costs, travel expenses for depositions, expert fees, and investigation costs. These are recorded as an asset (Client Cost Advances Receivable) when paid, not as an expense. When the client reimburses the cost (either through a billing or through settlement proceeds), the asset is reduced. If the cost is written off (the client will not reimburse), it moves from the asset account to an expense (Bad Debt or Written-Off Client Costs).

Trust liability account: The trust account balance appears on the balance sheet as a liability (Client Trust Funds Held). The firm holds this money on behalf of clients; it is not the firm’s money. The offsetting asset is the Trust Bank Account. The two should always be equal (trust bank balance = client trust funds held). Individual client sub-ledgers within the trust account are maintained in the practice management software or a separate ledger.

Operating expenses: Rent, utilities, insurance (malpractice insurance is a significant line item for law firms), technology (practice management software, legal research subscriptions, document management), marketing, professional development, bar dues and CLE, office supplies, and professional fees (accounting, IT).

Partner accounts: Each partner has a capital account (equity), a draw account (reductions of capital for cash distributions), and a guaranteed payment account (if applicable). These feed the K-1 reporting covered in partner compensation.

In QuickBooks Online, the trust account is set up as a separate bank account (not as a sub-account of the operating account). The practice management system (Clio, CosmoLex, PracticePanther, Smokeball) handles the client-level detail (time entries, invoices, trust transactions by client) and syncs summary data to QuickBooks for the financial statements.

How do I record billable time and work-in-progress?

Billable time is recorded in the practice management system, not in QuickBooks. Each timekeeper (partner, associate, paralegal) enters time daily, tagged to a client and matter. The time entry includes the date, the timekeeper, the hours worked, the billing rate, the client/matter, and a description of the work performed.

Work-in-progress (WIP) is the accumulated unbilled time across all matters. It represents services performed but not yet billed. WIP has economic value (it will eventually become revenue when billed and collected, or it will be written off if the time is non-billable or the client disputes it), but it is not “revenue” until the firm issues an invoice.

For financial reporting purposes, WIP can be tracked as a memo item (reported in the practice management system’s WIP report but not recorded on the balance sheet) or as a balance sheet asset (Unbilled Work-in-Progress). Most small and mid-size law firms track WIP as a memo item and use the cash method for tax purposes, which means WIP is not reported on the tax return. Larger firms on the accrual method may book WIP as an asset and recognize revenue when the work is performed.

The monthly WIP review is one of the most important management functions. The partners should review WIP by matter to identify: matters where time is accumulating faster than the client is being billed (a collection risk), matters where WIP is stale (time recorded months ago that has not been billed, suggesting the matter is dormant or the time is non-billable), and matters where WIP exceeds the fee agreement (a cap or flat-fee matter where the firm has already performed more work than the fee covers).

The write-off decision: when WIP will not be billed (the partner decides the time was excessive, the client will not pay, or the fee agreement does not support the full amount), it is written down. The write-down reduces WIP and is recorded as a Write-Down of WIP expense (or a reduction of revenue, depending on the firm’s accounting policy). Tracking write-downs by partner, practice area, and matter type reveals patterns: a partner who consistently writes down 30% of recorded time has a billing rate, efficiency, or scope management problem.

How should client cost advances be handled?

Client cost advances are one of the most frequently mishandled items in law firm bookkeeping. The common mistake is recording them as expenses when paid, which overstates expenses and understates assets.

The correct treatment: when the firm pays a cost on behalf of a client (a filing fee, a deposition transcript, an expert’s invoice), it records the payment as an increase in the Client Cost Advances Receivable asset account, not as an expense. The firm has not incurred an expense; it has made a loan to the client that the client is expected to repay.

When the firm bills the client for the cost advance (typically included on the next invoice along with fees for services), the billing reduces the Client Cost Advances Receivable and creates an Account Receivable (the client now owes the firm for both fees and costs). When the client pays the invoice, the Account Receivable is reduced and cash is received.

If the client will not reimburse the cost (the case settles with insufficient proceeds, or the client disputes the cost, or the firm decides not to pursue collection), the cost advance is written off. The write-off moves the amount from Client Cost Advances Receivable to an expense (Written-Off Client Costs or Bad Debt Expense). This write-off is the point at which the firm recognizes the economic loss, not the point at which the cost was originally paid.

For contingency-fee matters, cost advances can be significant. A personal injury firm may advance $50,000-$200,000 in costs (medical records, expert witnesses, court reporters, investigation) over the life of a case that takes 2-3 years to resolve. These costs sit as an asset on the balance sheet until the case resolves. If the case is won, the costs are reimbursed from the settlement proceeds before the contingency fee is calculated. If the case is lost, the costs are written off.

What does the monthly close look like?

The monthly close for a law firm has steps that do not exist in other businesses:

Step 1: Trust account three-way reconciliation. Reconcile the trust bank statement, the trust general ledger, and the sum of individual client sub-ledger balances. All three must agree. This is the most important step and is covered in detail in the IOLTA trust accounting guide.

Step 2: Operating bank reconciliation. Standard bank reconciliation for the operating account. Match cleared transactions, identify outstanding checks, post any bank fees or interest.

Step 3: Revenue recognition. Record revenue for invoices issued during the month. For hourly matters, revenue equals the fees billed. For flat-fee matters, revenue is recognized when the work is performed (or when the milestone is completed, depending on the fee structure). For contingency matters, revenue is recognized when the case resolves and the fee is determinable.

Step 4: Client cost advance reconciliation. Review the Client Cost Advances Receivable balance by matter. Confirm that advances billed to clients have been reclassified to Accounts Receivable. Identify stale advances (costs paid more than 90 days ago that have not been billed) and determine whether they should remain as assets or be written off.

Step 5: WIP review. Pull the WIP report from the practice management system. Review by matter for stale time, excessive accumulation, and write-down candidates. Partners approve write-downs, which are recorded as adjustments.

Step 6: Accounts receivable aging. Review outstanding invoices by age (current, 30 days, 60 days, 90+ days). Follow up on past-due invoices. Write off uncollectible balances.

Step 7: Expense review. Post any accrued expenses (malpractice insurance premiums that are paid annually but allocated monthly, for example). Review credit card statements and petty cash for unposted transactions.

Step 8: Partner reporting. Produce the monthly financial package: income statement (by practice area if the firm tracks revenue by area), balance sheet, trust account summary, WIP summary, AR aging, and partner draw/capital account activity.

How does the tax method affect the books?

Most law firms (and all partnerships qualifying under the IRC 448(c) gross receipts test, which is under $31 million in average annual gross receipts for 2025) use the cash method of accounting for tax purposes. Under the cash method, revenue is recognized when collected (not when billed), and expenses are recognized when paid (not when incurred).

The cash method simplifies the tax return but creates a divergence between the financial statements and the tax return. The financial statements may show accrual-basis revenue (fees billed but not yet collected as Accounts Receivable) and accrual-basis expenses (costs incurred but not yet paid as Accounts Payable), while the tax return reports only cash received and cash paid.

For client cost advances, the cash method provides a benefit: the cost advance is not deductible when paid (because it is an asset, not an expense) and is not income when reimbursed (because it is a return of capital, not revenue). The only tax event is a write-off (which creates a deduction when the firm determines the cost is uncollectible) or a gain (if the reimbursement exceeds the advance, which is rare).

For WIP, the cash method means unbilled time is not a taxable asset. The firm does not pay tax on WIP, even though it has economic value. This is one of the advantages of the cash method for professional service firms: the timing of revenue recognition is deferred until collection, which provides a natural deferral of taxable income.

What should I do next?

If your firm’s books do not separate operating revenue from trust account activity, that is the first fix. If client cost advances are recorded as expenses, reclassify them to an asset account. If the monthly close does not include a trust account three-way reconciliation, start there. If the partners do not receive monthly financial reports, build the reporting package and distribute it by the 15th of the following month.

• Law firm tax deductions, malpractice insurance, bar dues, CLE, legal research, and the deductions unique to legal practice
• Law firm billing and collections, billing cycles, retainer management, AR aging, and the revenue leakage metrics that determine profitability
• IOLTA trust accounting, the trust account compliance rules, three-way reconciliation, and common violations
• Law firm partner compensation, the K-1 reporting, guaranteed payments, SE tax, and SSTB classification for partners
• Restaurant bookkeeping, the parallel industry bookkeeping guide (food cost and prime cost instead of WIP and trust)
• Construction contractor tax deductions, the parallel WIP and percentage-of-completion issues for another industry with complex revenue timing
• Trust fund recovery penalty, personal liability when the firm falls behind on employment taxes for staff

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.