Billable Hour Tracking vs. Flat-Fee Project-Based Accounting
How a firm structures its internal accounting often follows its fee structure — hourly billing requires detailed time tracking, while flat-fee work is managed more like project-based accounting.
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Billable Hour Tracking
Time is logged in detail against specific matters, forming the basis for hourly invoices.
- Directly ties revenue to actual time invested in a matter
- Detailed records support invoice transparency for clients
- Requires consistent, disciplined time entry from every timekeeper
- Administrative overhead of reviewing and editing time entries
Flat-Fee Project Accounting
Revenue and cost are tracked per matter or project rather than by individual billable hour.
- Simpler for clients to understand and budget around
- Less administrative time spent on granular time entry
- Requires accurately pricing flat fees to remain profitable regardless of actual time spent
- Less visibility into which specific tasks are consuming the most time
Which one makes sense for you?
Billable hour tracking fits hourly fee arrangements and gives detailed visibility into where time goes, but requires disciplined, consistent time entry to be accurate. Flat-fee project accounting is simpler operationally and easier for clients to understand, but depends on having accurately priced the flat fee in the first place — which itself often benefits from some historical time-tracking data to get right.
Key cost factors.
- Whether the firm's fee structure is primarily hourly, flat-fee, or contingency
- Staff discipline and habits around time entry
- Client preference for detailed invoices versus predictable flat pricing
- Existing case management software's accounting capabilities
Before you decide.
- What share of our current matters are billed hourly versus flat-fee?
- How consistently is time currently being logged across the team?
- Would flat-fee pricing require repricing based on actual time data we don't currently have?
Frequently asked questions.
Can a firm use flat fees without ever tracking time?
It's possible, but many firms still track time internally even on flat-fee matters, specifically to understand actual profitability and set accurate pricing on future flat-fee engagements.
All figures on this page are illustrative examples for general education, not quotes, appraisals, or guarantees of actual pricing. Actual costs vary by provider, location, project scope, and market conditions — always get a specific quote before making a purchasing decision.
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