6-Minute Billing Increment

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

1. Track contemporaneously: Record time as work happens, not at day's end
2. Be specific: Include detailed descriptions for each time entry
3. Round up judiciously: Don't abuse rounding for small tasks
4. Use time tracking software: Automate calculations and reduce errors
5. 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