Published on · By the IT LABS PRO team
When you outsource software development, the first question is usually “how much?”. The second should be “how will we work together?”, because the engagement model decides who carries the risk, how changes are handled and how predictable your budget is. There are three main models. None is better in absolute terms; each fits a type of project.
1. Fixed price
The provider commits to delivering a defined scope for an agreed price and date. You pay in stages, usually tied to deliveries.
When it fits
- The scope is clear and stable: a showcase website, a well-specified module, a migration.
- You have a fixed budget approved in advance.
- The project is short (a few weeks to a few months).
The strengths
- A predictable budget: you know the price before you start.
- Less day-to-day management on your side once the scope is agreed.
- The provider carries the risk of underestimating the work.
The pitfalls
- It needs precise requirements: anything not written is open to interpretation. See our guide to writing a requirements document.
- Every change costs an amendment, which can slow things down and create friction.
- A risk premium: providers include a margin for uncertainty in the price.
- The temptation to cut corners when a fixed-price project runs over: insist on clear acceptance criteria.
2. Time and materials
You pay for the time actually spent, at an agreed daily or hourly rate, usually invoiced monthly with a timesheet. The scope can change along the way.
When it fits
- The need is not fully known yet, or will change as users give feedback.
- You are building a product in iterations (MVP, then improvements).
- Maintenance and continuous improvement of an existing application.
The strengths
- Flexibility: you can reprioritise at any time without renegotiating a contract.
- No risk premium: you pay for the real work.
- Faster start: no need to specify everything upfront.
The pitfalls
- A less predictable budget: set a monthly cap and review it.
- It needs your involvement: someone on your side must prioritise and accept the work regularly.
- Transparency is essential: ask for detailed time reports and working software at regular intervals, not just invoices.
3. Dedicated team
The provider assigns one or more people (developers, tester, project manager) to work on your projects full time or part time, for a monthly fee per person. The team works like an extension of yours, following your priorities and often your tools and rituals.
When it fits
- You have a continuous flow of work over months or years: a product to develop, several client projects (for agencies).
- You want to grow your capacity without recruiting locally.
- You have someone who can lead the team day to day (product owner, technical lead).
The strengths
- Continuity: the same people build up knowledge of your product and your business.
- A stable monthly cost, easy to plan.
- Control: you set the priorities and see the work every day.
The pitfalls
- You pay for capacity, not results: the team’s output depends on how well it is led.
- A minimum commitment is usually required (a few months), as the provider recruits or reserves people.
- Check who the people are: interview them, and agree on how replacements are handled.
The decision table
| Your situation | Fixed price | Time and materials | Dedicated team |
|---|---|---|---|
| Clear, stable scope | Best fit | Possible | Overkill |
| Need still evolving | Risky | Best fit | Good fit |
| Short project (under 3 months) | Best fit | Good fit | Rarely |
| Long-term product | Rarely | Good fit | Best fit |
| Fixed budget approved upfront | Best fit | With a cap | With a fixed duration |
| Little time to manage the provider | Good fit | Difficult | Difficult |
| Agency with recurring client projects | Per project | Good fit | Best fit |
Combining models
Many successful projects mix models over time:
- A paid scoping phase at a fixed price: workshops, requirements, mock-ups and an estimate. It tests the relationship at limited cost.
- A first version at a fixed price, now that the scope is clear.
- Improvements and maintenance in time and materials, or with a small dedicated team once the product grows.
For digital agencies that outsource client work, a common pattern is a dedicated team for the steady flow and fixed-price quotes for one-off projects. Our article on white-label development describes how agencies organise this.
Contract points to check, whatever the model
- Scope or backlog: what is included, how changes are requested and approved.
- Acceptance: how and when you test and accept each delivery.
- Payment schedule: tied to deliveries (fixed price) or to monthly reports (time and materials, dedicated team).
- Intellectual property: the code belongs to you once paid for, with continuous access to the repository.
- Confidentiality and data protection: see our NDA, IP and GDPR checklist.
- Warranty and exit: bug fixes after delivery, notice period, hand-over.
Frequently asked questions
Is fixed price always safer for the client?
Safer for the budget, not always for the result. If the requirements are incomplete, you either pay for amendments or receive exactly what was written rather than what you needed.
How do I control costs in time and materials?
Agree on a monthly cap, prioritise the backlog together, ask for weekly time reports and look at working software at each step. Stop or redirect early if progress does not match the spend.
Can I switch models during a project?
Yes, and it is common: a fixed-price first version followed by time and materials for improvements. Plan the switch in the contract.
How much does a dedicated developer in Morocco cost?
It depends on seniority and skills; ask for a monthly rate per profile. Compared with Western Europe, rates are usually significantly lower, with a similar working day thanks to the time zone.
In short
Choose fixed price for a clear, stable scope; time and materials when the need will evolve; a dedicated team for a continuous, long-term flow of work. Combine them as the project matures, and secure scope, acceptance, ownership and exit in the contract whatever the model. IT LABS PRO works in all three models: tell us about your project on our offshore software development page.