Fixed Price vs Time and Materials vs Hybrid

Description

Company Fixed price, time and materials, or hybrid: which engagement fits

WavX quotes work in three ways: fixed price, time and materials, or a hybrid of the two. Fixed price suits a scope you can write down. Time and materials suits work that will change as it goes. A hybrid fixes the price of a defined first version and leaves later work flexible. The terms for each engagement are confirmed in the proposal.

Talk to a technology expert Last updated 2 October 2026

The three options

Fixed price

Time and materials

Hybrid

What you pay

One agreed price for a written scope

For the time spent

A fixed price for a defined first version, then for time spent on what follows

Fits when

The scope can be written down in enough detail to quote

The work will change as you learn, or the backlog shifts often

The first version is clear and what comes after is not

Who carries the estimate risk

The vendor

You

The vendor for the first version, you after it

Main risk to you

Changes to scope have to be re-agreed

The total is not known in advance

You need both parts scoped at the start

WavX offers all three and quotes after a free consultation. For a planning range before that, see pricing .

A fixed price is one number for one written scope. It works when you can describe what you want well enough for someone to quote it: a website, a defined app, an integration between two named systems.

Its strength is that you can plan against the number. Its weakness is change. Anything outside the written scope is new work, so a fixed price is only as good as the scope behind it. The discovery and design stages of the WavX process exist to pin the scope down before the build starts.

With time and materials you pay for the time the team spends. It suits a product that is still finding its shape, and ongoing iteration where the priorities change from week to week.

It gives you freedom to change direction without renegotiating. In return, you take on the estimate risk, and you need a steady supply of decided work. Paying for capacity you have not prepared work for is the most common way this model becomes poor value.

Dedicated developers are a version of this model. The guide to dedicated developer costs in India covers the rates and the trade-offs.

A hybrid uses each model where it is strong: a fixed price for version one, where the scope is knowable, then time and materials for the changes real users ask for. Most projects fit this shape. Ask for both parts to be scoped at the start, so the second does not come as a surprise.

How to choose

Can you write down what you want in enough detail to be quoted? Take the fixed price.

Will the requirements change every few weeks? Take time and materials.

Is the first version clear and the rest unknown? Take the hybrid.

Not sure what you want yet? Fill in the project brief template first. The gaps in it will tell you which model you need.

What the proposal confirms

WavX does not publish standard contract terms. These are set for each engagement and written into the proposal:

the billing cycle and payment schedule

how hours are recorded and reported, for time and materials

the notice period

any minimum engagement

how a change to a fixed scope is priced

Read them before you sign. If one is missing, ask for it in writing.

What is the same under every model

You own 100% of the source code and intellectual property WavX ships.

The quote follows a free consultation.

The work is custom-built, not assembled from templates.

When none of these is the right answer

The work is permanent and continuous. A product that needs full-time engineers for years is a case for hiring in-house. The comparison of in-house, agency and freelancer covers this.

The task is small and bounded. A single fix or a small script may be cheaper from a freelancer, as long as the code and accounts stay in your name.

An off-the-shelf product already does it. Then no engagement model beats a subscription.

Frequently asked questions

Which engagement models does WavX offer?

Fixed price, time and materials, or a hybrid. After a free consultation we share a clear, customised quote with fixed-price, time-and-materials or hybrid options.

Which model is cheapest?

None is cheapest in general. If your scope is clear, fixed price is usually the safer choice because the estimate risk sits with the vendor. If the scope will change, a fixed price turns every change into a renegotiation, and time and materials usually works out better.

What are the billing cycle, notice period and minimum engagement?

WavX does not publish standard terms for these. They are set for each engagement and written into the proposal. Check them there before you sign, and ask if any is missing.

Who owns the code under each model?

You do, under all three. The client owns 100% of the source code and intellectual property WavX ships.

Can I hire dedicated developers from WavX?

Dedicated developers are a form of time and materials: you pay for capacity over a period, not for a fixed deliverable. Our guide to dedicated developer costs in India explains when that is worth it and when a fixed-price project is the better buy.

Related

How WavX prices a project

How a WavX project runs

Dedicated developer hiring cost in India

In-house vs agency vs freelancer

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