6-Minute Billing Increment
Professional-services standard billing method where one hour equals ten 0.1-hour segments, commonly used by lawyers, accountants, and consultants for precise billable time tracking.
Last updated: 2026-03-16 19:07
Overview
The 6-minute billing increment (also known as the 0.1-hour or tenth-of-an-hour method) is the professional-services standard for time tracking and billing. In this system, one hour is divided into ten segments of 6 minutes each, with each segment representing 0.1 hours.
Why 6-Minute Increments?
Historical Context
- Originated in legal profession in mid-20th century
- Designed to capture small increments of work accurately
- Became industry standard across professional services
- Most courts, insurers, and procurement departments accept this format
Practical Advantages
- Easy to calculate (10 segments per hour)
- Provides reasonable granularity without being overly precise
- Widely understood and accepted
- Simplifies billing calculations
- Standard format for LEDES (Legal Electronic Data Exchange Standard) billing
How It Works
Time Conversion Chart
| Minutes | Decimal Hours | Billing Increment |
|---|---|---|
| 1-6 | 0.1 | 0.1 hours |
| 7-12 | 0.2 | 0.2 hours |
| 13-18 | 0.3 | 0.3 hours |
| 19-24 | 0.4 | 0.4 hours |
| 25-30 | 0.5 | 0.5 hours |
| 31-36 | 0.6 | 0.6 hours |
| 37-42 | 0.7 | 0.7 hours |
| 43-48 | 0.8 | 0.8 hours |
| 49-54 | 0.9 | 0.9 hours |
| 55-60 | 1.0 | 1.0 hours |
Rounding Rules
- Time is typically rounded UP to the nearest 6-minute increment
- A 3-minute phone call = 0.1 hours (6 minutes)
- A 7-minute email = 0.2 hours (12 minutes)
- A 25-minute meeting = 0.5 hours (30 minutes)
Industries Using 6-Minute Billing
Legal Services
- Law firms (all practice areas)
- Corporate legal departments
- Legal consultants
- Expert witnesses
Accounting & Financial Services
- CPA firms
- Tax preparation
- Financial advisors
- Forensic accountants
Consulting
- Management consultants
- IT consultants
- Engineering consultants
- Strategy consultants
Other Professional Services
- Architects
- Engineers
- Medical consultants
- Expert witnesses
Best Practices
For Service Providers
- Track contemporaneously: Record time as work happens, not at day's end
- Be specific: Include detailed descriptions for each time entry
- Round up judiciously: Don't abuse rounding for small tasks
- Use time tracking software: Automate calculations and reduce errors
- Review before billing: Ensure accuracy and reasonableness
For Billing Systems
- Display both actual time and billable time
- Allow for manual adjustments when appropriate
- Generate time summaries in 0.1-hour format
- Export to standard formats (LEDES, Quickbooks)
Ethical Considerations
Avoid "Bill Padding"
- Rounding every small task up can accumulate significantly
- Some firms round down when appropriate
- Transparency with clients about billing practices
- Regular bill review to ensure reasonableness
ABA Guidelines (American Bar Association)
- Time billed should be reasonable
- No double billing for multitasking
- Administrative tasks may not be billable
- Travel time often billed at reduced rate
Alternatives to 6-Minute Billing
Other Increment Systems
- 15-minute increments (0.25 hours): Used by some consultants
- 1-minute increments: Modern software allows precise tracking
- Task-based billing: Fixed fee per task regardless of time
Value-Based Billing
- Moving away from hourly to value-delivered
- Fixed fees for projects
- Subscription-based services
- Retainer agreements
Time Tracking Software Support
Most professional services time tracking software supports 6-minute billing:
- Automatic rounding to 0.1 hours
- Conversion from timer to billable increments
- Customizable rounding rules
- Decimal hour displays
- LEDES format exports
Impact on Revenue
Revenue Capture
Studies show:
- Lawyers using automated time tracking capture 95% of billable work
- Manual tracking captures only 70% of billable work
- Consultants can forfeit up to 70% of earned revenue without proper time tracking
- 6-minute rounding ensures small tasks are billed
Average Billable Hours
- Lawyers record only 2.9 billable hours per day on average
- Many billable hours are lost due to:
- Forgetting to track short tasks
- Underestimating time spent
- Administrative overhead
- Context switching
Challenges
- Client pushback: Some clients prefer task-based or value-based fees
- Administrative burden: Requires diligent time tracking discipline
- Misalignment of incentives: Rewards time spent, not efficiency
- Modern alternatives: Younger clients may prefer fixed fees
- Minimum charge: 6-minute minimum can seem high for brief tasks
Future Trends
- AI-assisted time tracking: Automatic categorization and entry
- Activity-based tracking: Automatic detection of billable activities
- Hybrid models: Combining hourly billing with fixed fees
- Transparency tools: Real-time client portals showing accrued time
- Alternative fee arrangements (AFAs): Moving beyond pure hourly billing
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