Fixed-Fee vs. Time & Materials Pricing

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.