When you're pricing prototype and MVP development work, choosing between hourly rates and fixed fees can make or break your profitability and client relationships. Each model carries distinct tradeoffs that directly impact how much you earn per project and which clients you attract. Let's cut through the noise and show you exactly when to use each.
The Hourly Model: When It Makes Sense
Hourly billing works best for discovery-heavy projects where scope isn't locked down from day one. If a client isn't sure whether they need a native iOS app, a web MVP, or a hybrid solution, hourly rates protect you from underestimating the work.
Typical rates for prototype development run $75–$150/hour for junior developers, $150–$250/hour for mid-level specialists, and $250–$400+/hour for senior architects or domain experts. These ranges vary significantly by geography and specialization—a blockchain prototype engineer commands more than a basic web form builder.
The real risk: clients feel the meter running and become anxious about costs. Scope creep becomes a conversation about whether the client "should" ask for another feature, not whether they need it. You'll need solid project tracking software and weekly invoices to keep the relationship transparent.
Fixed-Price Models: Structure and Protection
Fixed pricing appeals to both business owners and clients. You quote $8,000 for a working MVP of a SaaS dashboard, the client knows the exact cost, and you manage your time to hit that target. No surprises, no midnight panics about overruns.
To set fixed prices accurately, break down the prototype scope into concrete deliverables:
- Authentication system and user database
- Core feature implementation (3–5 core flows)
- Basic testing and bug fixes
- Deployment to staging environment
- One round of client feedback incorporation
This forces specificity. A vague "build me an app" becomes "interactive wireframes + 2-week development sprint + API integration with Stripe."
Common ranges for MVP work: a basic web prototype typically costs $5,000–$15,000, a mobile app prototype $12,000–$35,000, and a complex multi-platform MVP $25,000–$75,000+. These numbers assume focused scope—not "build the next Instagram."
Hybrid Approaches: Best of Both Worlds
Many successful prototype shops use tiered pricing. Offer a fixed fee for the core MVP ($12,000), then charge hourly ($150/hour) for additional features or custom integrations the client requests mid-project. This sets expectations while remaining flexible.
Another hybrid: retainer + completion bonus. Charge a monthly retainer ($3,500–$8,000) to keep the team available and focused, then add a completion bonus when the prototype hits launch. Clients like knowing they have dedicated capacity.
What Actually Determines Your Rate
Your pricing should reflect:
- Your portfolio depth. First MVP projects warrant $50–$100/hour or $4,000 fixed. After 10+ shipped prototypes, you can command 2–3x that.
- Problem complexity. Prototyping a social app is harder than a CRUD dashboard. Price accordingly.
- Client segment. Bootstrapped founders will negotiate hourly rates harder; Series A startups with venture funding accept fixed quotes readily.
- Geographic location. NYC and San Francisco pay 40–60% premiums over Midwest markets.
Making the Business Case
If you're juggling multiple clients, hourly rates give you revenue predictability but kill your leverage—a developer working 40 hours at $120/hour makes $4,800 whether they finish in 3 weeks or 6 weeks. Fixed pricing aligns your incentive to ship fast and retain profit.
Document everything. Track time estimates against actual hours for the first 5–10 projects. This data becomes your pricing foundation. You'll quickly identify which prototype types you underestimated.
When you're ready to win more clients and showcase your expertise at scale, listing your services on Mercoly helps you get found by founders actively searching for prototype builders, manage leads efficiently, and close deals faster.
Frequently Asked Questions
Q: Should I include revision rounds in a fixed-price prototype quote? Yes—specify exactly how many rounds of feedback (typically 1–2) are included in the fixed fee. Additional revisions beyond that scope trigger hourly billing or a separate change order.
Q: What's the difference between quoting an MVP and a prototype? A prototype is a proof-of-concept (4–8 weeks, $5,000–$20,000). An MVP is a minimal viable product ready for real users (8–16 weeks, $15,000–$50,000+). Prototypes skip production infrastructure; MVPs include it.
Q: How do I handle scope creep with fixed pricing? Freeze scope before work starts and document it in writing. Any feature request outside the original spec gets a written change order with timeline and cost before development begins.
Start by tracking your actual hours on the next three projects, then align your rates to what the market pays for your skill level in your region.