Less Manual Entry. Faster Month-End.
Legal billing software built natively on QuickBooks Online.
LeanLaw was designed with billing staff and bookkeepers in mind. Every invoice, payment, and trust transaction syncs to QuickBooks Online automatically — no exports, no duplicate entry, no end-of-month scramble to reconcile.
Trusted by billing staff and bookkeepers at 1,000+ law firms
Manual Billing Costs More Than You Think.
Billing staff and bookkeepers at law firms waste hours every month on data that should flow automatically — re-keying invoices into QuickBooks, chasing attorneys for missing time entries, and reconciling trust accounts by hand. LeanLaw eliminates all of it.
Stop Entering the Same Data Twice.
Most law firm software makes you bill in one system and re-enter everything into QuickBooks. LeanLaw is built natively on QuickBooks Online — every invoice, payment, and trust transaction posts to the general ledger automatically the moment it happens.
See how it worksClose the Books Without the Scramble.
When billing runs late, month-end becomes a fire drill — tracking down missing time, correcting errors, and manually reconciling AR. LeanLaw gives you real-time WIP visibility, automated billing runs, and a QuickBooks sync that is always current.
Explore billing featuresTrust Accounting That Reconciles Itself.
Managing IOLTA accounts manually means exposure to compliance risk and hours of reconciliation work. LeanLaw's built-in trust accounting handles retainer draws, replenishments, and three-way reconciliation — and posts every entry to QuickBooks automatically.
Explore trust accounting One System That Does the Work For You.
LeanLaw is the only legal billing software built directly on QuickBooks Online — not synced to it, not exported to it, but running inside it as the actual general ledger. That means every action your billing team takes is already in the books.
- Every invoice posts to QuickBooks automatically — no manual export needed
- Payments sync the moment they clear — no manual reconciliation
- Trust retainer draws and replenishments post to IOLTA automatically
- Batch-generate invoices for all clients in minutes, not hours
- Attorney time entries flow directly into draft invoices — no re-keying
- View AR aging, WIP, and collected revenue in real time
- Run three-way trust reconciliation in one click
- QuickBooks chart of accounts stays clean — no duplicate line items
"As a bookkeeper in the legal industry, I appreciate how well LeanLaw integrates with QuickBooks Online. It is simple to use and makes keeping up with law-firm finances far easier."
Brandy Derrick, Owner
Legal Ease Bookkeeping
From Time Entry to Closed Books —
Without Leaving One System.
LeanLaw connects every step of the billing cycle in a single workflow — so billing staff spend their time managing exceptions, not entering data by hand.
Collect Attorney Time
Attorneys enter time from any device — web, mobile, or email. Automated reminders keep entries current, so billing staff are never chasing missing hours at month-end.
Build & Approve Invoices
Batch-generate invoices for every client in minutes. Billing staff can edit line items, apply billing rules, and route invoices for partner approval — all without touching a spreadsheet.
Sync to QuickBooks Instantly
The moment an invoice is approved or a payment clears, it posts to QuickBooks Online automatically. No exports, no manual entry, no risk of data mismatch between your billing system and your books.
Close the Month — Fast
Trust reconciliation, AR aging, and revenue reports are always current. Month-end becomes a review, not a reconstruction. Most LeanLaw firms close in a day instead of a week.
IOLTA Compliance That Doesn't Require a Spreadsheet.
Trust accounting is the highest-risk part of a law firm's finances — and the part most billing software handles worst. LeanLaw's built-in trust module gives billing staff and bookkeepers a complete client trust ledger, automated three-way reconciliation, and full QuickBooks Online integration for every trust transaction.
What Billing Staff Gain When
They Switch to LeanLaw.
Billing coordinators, bookkeepers, and accounting staff who move to LeanLaw spend less time on data entry and more time on work that actually moves the firm forward.
1,000+
law firms run on LeanLaw
70%
faster invoice collections
$61K
leaked revenue recovered per attorney each year
20–50×
ROI for a typical 10-attorney firm
"As a bookkeeper in the legal industry, I appreciate how well LeanLaw integrates with QuickBooks Online. It is simple to use and makes keeping up with law-firm finances far easier."
Brandy Derrick, Owner
Legal Ease Bookkeeping
"Tracking payments to specific matters was a nightmare before LeanLaw. Now everything syncs to QuickBooks automatically. We see invoices paid 70% faster."
Amanda Coughlan, Billing Coordinator
Zahn Law Group
"When I saw LeanLaw and showed it to our most techy attorney, his eyes lit up and we jumped in. LeanLaw customer support has been outstanding."
Tammy Kayati, Bookkeeper
Barros, McNamara, Malkiewicz & Taylor
"We are able to invoice our clients within two to three days, versus 10 or 12."
Alicia Wood, Firm Administrator — Burkhalter Law
Further Reading
Resources to help billing and accounting staff evaluate and get more from legal billing software.