Law firm bookkeeping has strict trust accounting requirements that create real malpractice risk when handled wrong. Plus the economics of professional services – WIP, realization, lockup – that drive partner compensation. This guide covers what law firm bookkeeping requires to keep the firm compliant and economically transparent.
Trust accounting (or IOLTA – Interest on Lawyers' Trust Accounts) is the single most important specialty of law firm bookkeeping. Every state bar association has specific rules; violations trigger disciplinary proceedings that can end legal careers.
Common trust accounting violations (from state bar disciplinary records):
Penalties range from letters of admonishment (minor violations) to disbarment (severe violations involving misappropriation). Law firms that treat trust accounting casually eventually have problems.
Time that lawyers have recorded but haven't yet billed to clients sits as WIP (work-in-progress inventory). For law firms, WIP is one of the largest assets on the balance sheet. Unlike product inventory, WIP ages badly: legal work unbilled 90 days after performance has reduced collection probability.
Most law firms bill monthly. Billing mechanics:
Realization rate is the ratio of billed amount to recorded time value. Top-quartile law firms run 92–97% realization. Mid-pack run 82–90%. Bottom quartile sit under 78% and often don't know why. Monthly realization tracking by attorney reveals billing discipline patterns and pricing issues.
Lockup = WIP + AR, measured in days. Top law firms run 60–75 days of lockup. Struggling firms have 120+ days. Lockup reduction is one of the highest-impact finance interventions for law firms – reducing lockup from 120 to 90 days frees meaningful working capital.
Law firm partner compensation has specific mechanics that generic bookkeeping misses:
Partners typically take monthly draws (like salary) against year-end distribution. Draws are not compensation in tax sense; they're prepayments against partner's share of profit. At year-end, actual profit gets distributed; draws reconcile against distribution.
Each partner has a capital account tracking: initial capital contribution, additional contributions, share of firm income, distributions, withdrawals. Accurate capital account maintenance is essential for tax reporting (K-1 generation) and partner exit calculations.
Law firm partner compensation typically uses either formula-based (origination, working attorney, equity share, management points) or subjective allocation. Accounting must capture the inputs: originating partner for each matter, working attorney time, management activities. For formula-based firms, monthly tracking of formula components is essential.
Some firms use shadow billing: tracking revenue by origination partner (who brought the client in) vs working partner (who did the work). Compensation allocates based on both. Accurate tracking requires discipline in time entry.
Standard monthly P&L isn't enough for law firms. Monthly reporting typically includes:
Law firm-trained bookkeepers produce this suite monthly. Generic bookkeepers typically produce only the P&L and consider their work done.
Related: law firms industry page, offshore bookkeeping.
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