LEDES (Legal Electronic Data Exchange Standard) is the universal format for electronic legal billing. It standardizes how law firm invoices are structured, transmitted, and processed by corporate legal departments.
What Is LEDES?
LEDES defines a file format specification for legal invoices. Think of it as the "CSV of legal billing" — a structured data format that enables automated invoice processing across different software systems.
Common LEDES Formats
LEDES 1998B
- Most widely used format
- Pipe-delimited flat file
- One line per time or expense entry
- Includes matter, timekeeper, date, hours, rate, and amount
LEDES 1998BI
- International version
- Supports multiple currencies
- Additional fields for VAT/tax
- Used primarily outside the US
LEDES XML 2.0
- Modern XML-based format
- Richer data structure
- Better support for complex billing scenarios
- Growing adoption but not yet universal
File Structure (LEDES 1998B)
A LEDES file contains header and line-item data:
- Invoice header: Invoice number, date, client/matter IDs
- Line items: Date, timekeeper, hours, rate, amount, UTBMS codes
- Expense items: Date, description, amount, expense code
Why LEDES Matters
Standardization
- Eliminates manual invoice rekeying
- Reduces billing disputes and rejections
- Enables automated compliance checking
Efficiency
- Faster invoice processing (days to minutes)
- Automated UTBMS code validation
- Bulk invoice submission and processing
Analytics
- Structured data enables spend analysis
- Benchmarking across firms and matters
- Budget variance tracking
Implementation
Law firms need:
- Billing software that exports LEDES format
- UTBMS code mapping in their time entry system
- Validation tools to check files before submission
- E-billing portal access for electronic submission
Relationship to E-Billing
LEDES is the data format; e-billing is the platform. Most e-billing systems (Brightflag, CounselLink, Legal Tracker) accept LEDES files for invoice submission.