Billing increments are the units used to convert time worked into billable time entries. In legal billing, work is often recorded in decimal hours rather than minutes.
For example, 6 minutes is commonly recorded as 0.1 hour. Thirty minutes is recorded as 0.5 hour. One hour is recorded as 1.0 hour.
Billing increments matter because they affect invoices, client expectations, time entry review, and realization.
What Are Billing Increments?
A billing increment is the smallest unit of time a firm uses when recording billable work.
Common billing increments include:
6-minute increments, or 0.1 hour
10-minute increments, or about 0.17 hour
15-minute increments, or 0.25 hour
Actual time, depending on firm and client rules
The correct increment depends on the engagement agreement, client billing guidelines, and firm policy.
Common Billing Increment Chart
Minutes Worked | Decimal Hours | Common Increment |
6 minutes | 0.1 | 6-minute billing |
12 minutes | 0.2 | 6-minute billing |
18 minutes | 0.3 | 6-minute billing |
24 minutes | 0.4 | 6-minute billing |
30 minutes | 0.5 | Half hour |
45 minutes | 0.75 | Three quarters of an hour |
60 minutes | 1.0 | One hour |
This chart is a practical reference. Firms should follow the increment rules agreed with the client.
Why Billing Increments Matter
Billing increments affect how work is recorded and reviewed.
They matter because they influence:
Client invoices
Timekeeper habits
Billing accuracy
Write-offs
Client questions
Realization
Billing guideline compliance
Work-in-progress reporting
Even small increments can add up across a firm. A few minutes missed on many matters can become meaningful revenue leakage.
6-Minute vs 15-Minute Billing
Increment | Decimal Unit | Practical Meaning | Notes |
6-minute | 0.1 hour | Ten units per hour | Common in legal timekeeping |
10-minute | 0.17 hour | Six units per hour | Less clean in decimal billing systems |
15-minute | 0.25 hour | Four units per hour | Easier to read but less granular |
Actual time | Varies | Records time more precisely | Depends on system and policy |
More granular increments can make billing more precise. Larger increments may be simpler but can create client concerns if used without clear rules.
Billing Increments and Client Guidelines
Many clients set rules for how outside counsel should record time. These rules may define:
Minimum billing increments
Whether rounding is allowed
How block billing is treated
Whether administrative work is billable
Whether internal conferences are billable
Required task or activity codes
Description requirements
Lawyers should not assume the same increment applies to every client or matter.
Billing Increments and Time Entry Descriptions
The smaller the time entry, the more tempting it is to write a vague description.
Weak entry:
Email.
Better entry:
Prepared email to client summarizing revised contract comments and recommended response.
Even short time entries should explain the work. Clear descriptions make billing review easier and reduce unnecessary questions.
Rounding and Review
Rounding rules should be defined clearly by firm policy and client guidelines.
Before releasing entries, firms should review:
Whether the duration is reasonable
Whether the entry follows the correct increment
Whether the description explains the work
Whether the entry matches the client matter
Whether any rounding complies with client rules
Whether the entry is billable or non-billable
Time review is where billing accuracy and client trust are protected.
Common Mistakes with Billing Increments
Common problems include:
Using the wrong increment for the client
Rounding without checking billing guidelines
Combining unrelated tasks into one entry
Writing vague descriptions for short tasks
Forgetting short billable work entirely
Entering time too late
Treating every small task as automatically billable
Failing to review entries before billing
The problem is rarely just math. It is usually workflow.
How to Improve Increment-Based Timekeeping
Law firms can improve billing increment accuracy by:
Defining firmwide time entry standards
Training lawyers on client-specific rules
Capturing time close to the work
Reviewing calendar and document activity daily
Using clear descriptions for short tasks
Avoiding unnecessary block billing
Reviewing entries before release
Using software that supports lawyer control
How MIRA Helps
MIRA helps law firms capture work activity, review time inside Microsoft Teams, and prepare clearer billable descriptions before billing review.
For firms using billing increments, MIRA can help lawyers review captured activity closer to when work happens, reducing the need to reconstruct short tasks from memory.
For a connected workflow, explore Automated Time Tracking for Lawyers.
Related Resources
Frequently Asked Questions
What is a billing increment?
A billing increment is the unit used to record time for billing, such as 0.1 hour, 0.25 hour, or another client-approved unit.
What does 0.1 mean in legal billing?
In legal billing, 0.1 hour usually means 6 minutes.
What is a 6-minute billing increment?
A 6-minute billing increment divides an hour into ten units. Each unit is recorded as 0.1 hour.
Are billing increments the same for every client?
No. Billing increments can vary by client agreement, outside counsel guideline, matter type, or firm policy.
Why do billing increments matter?
Billing increments matter because they affect invoices, billing review, client trust, realization, and whether time entries comply with client rules.
