Overview
LeanLaw is a legal billing and trust accounting platform built natively on top of QuickBooks Online, designed for law firms that prefer QuickBooks as their accounting foundation and need a legal-specific layer for trust accounting, IOLTA compliance, and attorney time tracking. Unlike standalone legal billing tools that sync to QuickBooks via integration, LeanLaw is an embedded QuickBooks application — it writes directly to the QuickBooks chart of accounts in real time, eliminating sync errors and reconciliation headaches. Trust transactions, invoice payments, and expense reimbursements all flow into QuickBooks automatically without manual journal entries. The trust accounting module enforces IOLTA compliance rules — preventing commingling, tracking individual client ledgers, and generating the three-way reconciliation reports required by most state bars. Attorneys can see a client's trust balance at any point in the billing cycle without running a separate report. Time and expense tracking is designed for legal workflows, with matter-based time entries, billable versus non-billable coding, and support for multiple timekeeper rates on the same matter. Invoicing generates professional bills in multiple formats including LEDES for corporate clients. LeanLaw requires an active QuickBooks Online subscription. Pricing starts at $40/month plus $20/user/month. Best for small to mid-size law firms whose bookkeeper or accountant already uses QuickBooks, and where a deeply integrated billing tool is more practical than migrating to a standalone practice management platform.
Pros and cons
Pros
- Leverages QuickBooks — no duplicate accounting setup
- Strong trust/IOLTA compliance
- Familiar QBO interface for bookkeepers
- Solid origination tracking
Cons
- Requires active QuickBooks Online subscription (added cost)
- Not a standalone system — dependent on QBO
- Limited case management features
Who it's best for
Best fit for
- Firms already using QuickBooks Online
- Solo and small firm bookkeepers
- Firms wanting to stay in QBO ecosystem
Not a fit for
- Firms needing standalone legal accounting without QBO
- Large firms needing enterprise GL
- Firms wanting built-in practice management
Frequently asked questions
LeanLaw starts at $45/user/month. A QuickBooks Online subscription is also required, adding $35-$100+/month depending on the QuickBooks tier.
No. LeanLaw is built on top of QuickBooks Online and the two work together. You need both subscriptions. LeanLaw adds legal-specific features such as IOLTA trust accounting, legal time tracking, and LEDES billing that QuickBooks lacks natively.
Yes. LeanLaw supports IOLTA trust accounting with three-way reconciliation to meet state bar requirements.
Yes. LeanLaw supports LEDES 1998B format for corporate clients that require UTBMS task codes on invoices.
LeanLaw wins for firms already using QuickBooks. Clio has its own native billing and does not require QuickBooks. Firms not committed to QuickBooks should evaluate Clio or Bill4Time as standalone legal billing platforms.
Yes. LeanLaw includes IOLTA trust accounting as a native feature, running on top of QuickBooks Online. It tracks client retainers in trust, automates replenishment requests, and generates IOLTA-compliant reports — while keeping trust funds fully separated from operating accounts.
About LeanLaw
QuickBooks-integrated legal billing and trust accounting for law firms
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