Fixed Price vs Time and Materials vs Dedicated Team

Why the Engagement Model Matters

The way you contract a software partner decides who carries the risk when things change, and things always change. Picking the right model up front avoids most budget disputes.

Fixed Price

You agree a defined scope, a price and a delivery date.

Best for: well-understood projects with clear requirements, such as a marketing website, a defined integration or a scoped MVP.

Pros:

• Budget certainty.
• Clear acceptance criteria.
• Less management effort for you.

Cons:

• Changes need a formal change request.
• Vendors price in risk, so the total can be higher than the effort alone.
• Poorly written scope leads to arguments about what was included.

Time and Materials

You pay for the actual time spent, usually at agreed daily or hourly rates, with regular reporting.

Best for: discovery work, evolving products and projects where requirements will be learned along the way.

Pros:

• Full flexibility to change priorities.
• You pay only for work done.
• Easy to start quickly.

Cons:

• Less budget certainty.
• Requires active involvement to steer priorities.

Dedicated Team

A stable team works only on your product for an ongoing monthly fee. You direct priorities, and the vendor handles hiring, payroll and management support.

Best for: long-term products, scale-ups that need capacity quickly, and companies building internal capability.

Pros:

• Deep product knowledge builds up over time.
• Predictable monthly cost.
• Easy to scale the team up or down.

Cons:

• Requires a product owner on your side.
• Less suited to short, one-off projects.

Learn more on our dedicated engineering squads page.

Quick Decision Guide

1. Requirements fully known and stable: fixed price.
2. Requirements still being discovered: time and materials, often for a short discovery phase.
3. Ongoing roadmap for six months or more: dedicated team.

The Hybrid That Works Well

Many successful projects combine models: a short time-and-materials discovery phase to define scope, a fixed-price build for the first release, then a dedicated team for ongoing development. Our fixed-scope programmes follow this pattern.

For typical budgets under each model, see custom software development cost.

Frequently Asked Questions

Which engagement model is cheapest?

None is cheapest in every case. Fixed price is cheapest when scope is truly stable; time and materials is cheapest when scope would otherwise change many times.

Can I switch models mid-project?

Yes. A common path is moving from fixed price to a dedicated team once the first release is live.

Who owns the code under each model?

Ownership should not depend on the model. Your contract should assign all code and IP to you in every case.

How do I keep a time-and-materials project under control?

Set a budget cap per sprint, review progress at every demo and reprioritise the backlog together with the team.