Fixed-Fee vs. Time & Materials Pricing
Two fundamental project pricing approaches where fixed-fee projects charge a predetermined amount regardless of hours worked (requiring time tracking for profitability analysis only), while time & materials projects bill based on actual hours tracked plus expenses (requiring time tracking for client billing), each with different risk profiles and time tracking needs.
About this tool
Overview
Fixed-Fee and Time & Materials represent two fundamental approaches to project pricing, each requiring different time tracking strategies and serving different project types.
Fixed-Fee Projects
Definition: Client pays predetermined amount for defined scope.
Time Tracking Purpose:
- Internal profitability analysis
- Resource planning
- Future estimation improvement
- Identify scope creep
- NOT for client billing
Advantages:
- Predictable client costs
- Incentive for efficiency
- Simpler invoicing
Risks:
- Scope creep erodes profit
- Underestimation causes losses
- Requires accurate scoping
Time & Materials (T&M)
Definition: Client pays for actual hours worked plus expenses.
Time Tracking Purpose:
- Direct client billing
- Invoice generation
- Budget monitoring
- Scope tracking
Advantages:
- Flexibility for changing scope
- Lower risk for vendor
- Transparent costs
Risks:
- Unpredictable client costs
- Requires client trust
- No efficiency incentive
Hybrid Models
Not-to-Exceed T&M:
- Bill hourly up to maximum
- Combines flexibility with budget certainty
Retainer:
- Fixed monthly fee
- Covers specified hours
- Overage billed separately
Time Tracking Implications
Fixed-Fee:
- Can track to project without task detail
- Internal visibility focus
- Estimate vs. actual comparison
T&M:
- Detailed task descriptions required
- Client-facing time entries
- Real-time budget tracking
- Invoice-ready documentation
Pricing
N/A - These are pricing models, not paid services.
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