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Templates / Contract

Free Custom Software Development Contract Template

A custom software development contract covers the scope baseline, change control, payment schedule, ownership, release risk, and what gets handed over at the end.

Custom Software Development Contract template preview

Language:

en

Last updated:

October 2026

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Scope drifts, integrations misbehave, and a live system still has to keep running, which means a custom build can feel like signing up for guesses. The custom software development contract puts the hard parts in writing so both sides can point to the same baseline scope, the same change process, and the same handover definition while the work is moving. The pages use rust and slate-blue accents under Space Grotesk headings with Roboto body text, so the document reads like a spec, not a pitch.

The contract ties itself to an accepted proposal, then explains what counts as in scope and how acceptance criteria get written down before anything ships. Payment is split 50% to book the work and 50% at handover, with 14-day terms and a pause on work and releases if payment is late. The change section defines a revision round and says changes get priced and approved in writing first, including when an API doesn't behave like the vendor promised... leaving less room for "we thought you meant" later on.

  • It applies to the project described Ties the contract to the accepted proposal and explains how scope, decisions, and handover get confirmed in writing when something is unclear.
  • What I will build Describes the deliverables and anchors the work to written scope and acceptance criteria, with anything outside that baseline treated as out of scope.
  • Payment Explains the 50% to book and 50% at handover structure, 14-day invoice terms, and what happens to work and release plans if payment is late.
  • Changes and revisions Defines what a revision round means, then covers how mid-project requirement changes and extra rounds get priced and approved before work continues.
  • Who owns what Explains ownership of project-specific code after full payment, what gets handed over, and what stays with the developer as pre-existing tools and know-how.

We went from spending hours on every proposal to creating fully customized ones in under 5 minutes. That's not an exaggeration - we timed it.

Yazan & Mawaheb
Yazan & MawahebAgency Owners

What to include in a custom software development contract

PartWhat it covers

It applies to the project described

Ties the contract to the accepted proposal and explains how scope, decisions, and handover get confirmed in writing when something is unclear.

What I will build

Describes the deliverables and anchors the work to written scope and acceptance criteria, with anything outside that baseline treated as out of scope.

Payment

Explains the 50% to book and 50% at handover structure, 14-day invoice terms, and what happens to work and release plans if payment is late.

Changes and revisions

Defines what a revision round means, then covers how mid-project requirement changes and extra rounds get priced and approved before work continues.

Who owns what

Explains ownership of project-specific code after full payment, what gets handed over, and what stays with the developer as pre-existing tools and know-how.

Portfolio use

Covers when the finished work can be shown as a portfolio piece and how to request privacy or redaction without exposing credentials or operational data.

Limits and risks

Describes release and production risk boundaries, including third-party systems outside control, and how incident triage differs from longer refactors or fixes.

Ending the project

Explains how either side can end the project with written notice, what gets paid for, and that handover of in-progress work happens after payment for completed work, including the repository and credentials created. Signature is included for sign-off.

Who it is for

Independent software developers, development studios, and consultants taking on custom software, API & integrations work, or legacy modernisation for a client who needs clear scope and handover.

The contract in full

It applies to the project described in the accepted proposal, and it is meant to keep scope, decisions, and handover unambiguous while the work is in motion.

If something is unclear, I would rather write it down and confirm it than guess. These terms explain how I define the baseline scope, how changes are handled, how I ship safely, and what you receive at handover.

What I will build

The project covers custom software development for the deliverables listed below. I start by writing the scope and acceptance criteria in plain language, and that document becomes the baseline for what I build and what you accept at handover.

Anything not covered by the written scope is out of scope by default. If you want to add or change something, I treat it as a change to that same scope document, and I will confirm the impact on timeline and price before I build it. The deliverables for this project are:

* Written scope and acceptance criteria * System design and data model notes * Working web app and API integrations * Automated tests and test harness * Release plan, rollback plan, and runbooks * Repository, credentials, and handover session

Payment

To book the work, I invoice 50% of the total price when you sign the proposal. I invoice the remaining 50% when the finished work is handed over, meaning I have delivered what is in scope and I am ready to transfer the repository, credentials I created, runbooks, and the handover session.

Each invoice is payable within 14 days of its date. If a payment is late, I pause work and I pause any planned release or cutover until the account is up to date. Timelines move by the length of the pause, and I will confirm the updated schedule with you in writing.

Changes and revisions

A revision round means: you review what I delivered against the written acceptance criteria, then you send one consolidated list of changes, and I apply those changes to bring the work in line with the agreed baseline. The number of revision rounds included is the number stated in the accepted proposal.

If you ask for changes beyond the included rounds, or you change requirements mid-way, I will write the change into the scope document and price it before I do the work. I only proceed after your written approval. If an integration behaves differently than the vendor promised, I will show the mismatch and offer a workaround or a scoped change.

Who owns what

Once you have paid in full, you own the code I wrote specifically for this project and the project deliverables I hand over to you. You also get the repository and the credentials I created for this work, so your team can run, maintain, and change the system without needing me.

What I keep are my pre-existing tools, libraries, templates, and general know-how that I use to work efficiently across projects. If I include any third-party components, your use of those stays under their own licenses. I will point out any such dependencies that matter for running or deploying the system.

Portfolio use

Unless you ask me not to, I may show the finished work as a portfolio piece. In practice that usually means a short written case note about the problem and what was delivered, and if it makes sense, a few screenshots or a short screen recording.

If you would rather keep the project private, tell me in writing any time before or after handover and I will not publish it. If you are fine with me mentioning the work but want specific details removed, I can do that too. I will not share your credentials, non-public operational data, or anything that would let someone access your systems.

Limits and risks

I take care with releases, and I plan cutovers with a rollback path, but software work still carries risk, especially around production systems and third-party integrations. I am not responsible for outages or data issues caused by systems I do not control, such as vendor APIs, hosting providers you choose, or changes made by others after handover.

If you request production incident triage and a hotfix release, my first job is to restore service and reduce immediate risk. Deeper root-cause cleanup, refactors, and long-running fixes are handled as a separate scoped change or sprint so you can choose the cost and timing rather than inheriting an open-ended bill.

Ending the project

Either of us can end the project by giving notice in writing. In that notice, I will propose a practical end date based on what is currently in flight, and I will not start new work that would be wasted. If you have a hard deadline driving the stop, tell me and I will aim to align the end date with it.

You pay for the work completed up to the end date. After payment for that completed work, I will hand over what is done so far, including the repository, any credentials I created, and notes needed to continue. If the project ends before completion, unfinished items remain out of scope unless we agree a new project.

Signature

Legal Notice: Please consult legal advice and carefully review the content of this contract template before implementing this template in your business.

Questions about this contract template

What should a custom software development contract include?

A custom software development contract usually includes a scope baseline tied to acceptance criteria, how changes get approved, payment timing, ownership of the code, and what handover means. This contract also covers release risk, portfolio use, and how either side can end the project.

How do you define scope and acceptance criteria in a software contract?

The contract treats a written scope and acceptance criteria document as the baseline for what gets built and what gets accepted at handover. Anything not covered by that written scope stays out of scope by default.

What happens if requirements change mid-project?

The contract routes requirement changes through the same scope document and confirms the impact on timeline and price before the work happens. The contract says work only continues after written approval.

Who owns the code in a custom software project?

The contract says the client owns the code written specifically for the project once paid in full, along with the deliverables handed over. The contract also keeps the developer’s pre-existing libraries, templates, and general know-how separate, and third-party components stay under their own licenses.

How do payments usually work for custom software development?

This contract uses a 50% invoice to book the work and a 50% invoice at handover, with each invoice payable within 14 days. Late payment pauses work and any planned release or cutover until the account is up to date.

What should happen at handover for custom software?

The contract treats handover as the point where the in-scope work is delivered and the developer is ready to transfer the repository, credentials created for the work, runbooks, and the handover session. If the project ends early, the contract still calls for handover of completed work after payment for that completed work.

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