Time-and-Materials vs. Fixed Scope. Both suck. Here's why:
Time-and-Materials (T&M)
→ You pay for hours worked → Flexible scope (change anything, anytime) → No surprises on change requests → Common in consulting
The problem: Unpredictable total cost. And zero incentive for efficiency. Why finish in 100 hours when 150 hours pays more?
Fixed Scope
→ Defined deliverables → Predictable total cost → Clear timeline → Common in agencies
The problem: Change requests are expensive. Scope creep battles. And it requires perfect upfront scoping (which never happens).
Why T&M Fails Buyers
Client: "How much will this cost?" Vendor: "We'll know when it's done."
→ Budget uncertainty (could be $50K or $150K) → No efficiency incentive (more hours = more money) → Hard to compare vendors (everyone quotes different hour estimates) → Scope drift ("just one more feature" × 50)
I've seen T&M projects run 3x over initial estimates because there's no forcing function to stop.
Why Fixed Scope Fails Buyers
→ Requires perfect requirements (impossible on complex projects) → Change requests are adversarial (every change is a negotiation) → Vendor cuts corners (incentive to finish fast, not right) → You're stuck (can't pivot based on learnings)
I've seen fixed-scope projects deliver exactly what was specified while completely missing what the client actually needed.
The Hybrid Model: Fixed-Scope Milestones
This is what ScopeForged uses:
→ Break the project into milestones (Phase 1, Phase 2, Phase 3) → Each milestone has a fixed scope and price → Built-in review points between milestones → Changes are transparent (handled between milestones) → You can stop after any milestone (if priorities change)
How It Works
Milestone 1: Core functionality — $40K, 6 weeks Review point: Did we hit the mark? What needs to change? Milestone 2: Advanced features — $30K, 4 weeks Review point: Are we still on track? Any pivots needed? Milestone 3: Polish and scale — $20K, 3 weeks
Total: $90K, 13 weeks. But you only commit to one milestone at a time.
The Benefits
→ Predictable costs (per milestone) → Built-in flexibility (adjust between milestones) → Efficiency incentive (vendor wants to deliver on scope) → Lower risk (can stop after any milestone) → Transparent change management (changes are discussed at review points, not mid-milestone)
When to Use Each Model
→ Pure T&M: Ongoing support, maintenance, staff augmentation → Pure Fixed Scope: Small, well-defined projects (<$25K) → Fixed-Scope Milestones: Everything else
The Real Comparison
T&M: "We think it'll take 400 hours at $150/hr, so maybe $60K?" (6 months later: $95K, still not done)
Fixed Scope: "$80K for everything on this list." (Change request: "That'll be another $30K and 8 weeks.")
Fixed-Scope Milestones: "Milestone 1 is $40K for this scope. Let's ship it and see what you need next." (Milestone 1 delivers, total project ends up being $70K because Milestone 3 wasn't needed)
The Bottom Line
Don't pick T&M or Fixed Scope. Pick Fixed-Scope Milestones.
You get the predictability of fixed scope with the flexibility of T&M.
What pricing model has worked best for you?
#SoftwareDevelopment #ProjectManagement #Consulting #PricingStrategy #TechLeadership
→ scopeforged.com
Philip Rehberger Founder, ScopeForged scopeforged.com
