Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
Contents
Are you about to hire a freelance developer and wondering what needs to go in the contract?
The reassuring answer is this: you don't need a 40-page document to protect your startup, but you do need the right terms in writing before any code is written, shared or paid for.
Software projects can move quickly. You might be building an MVP, commissioning an app, improving your SaaS platform or asking a developer to connect key systems. A clear contract helps you lock in who owns the code, what needs to be delivered, when payment is due and what happens if the project goes off track, often in a software development agreement.
Do You Need A Freelance Developer Contract In The UK?
Yes, if you're paying a freelance developer to build software for your business, you should have a written contract in place before work starts.
A handshake or a few messages might feel fine when everyone is excited about the build. The problem is that software work often involves details that people remember differently later, such as:
- Whether the developer is building a quick prototype or production-ready code.
- Whether you own the source code, not just the right to use the finished product.
- Whether open source tools or third party plugins can be used.
- When payment is due if you ask for changes.
- What happens if the developer stops responding halfway through.
A freelance software contract is also useful because it shows the developer is an independent contractor, not your employee. That won't decide employment status by itself, and it is not the same as an employment contract, but it helps set expectations around control, working hours, equipment, substitution and responsibility for taxes.
You should also think about IR35 and employment status if you're hiring through an intermediary, using a freelancer agreement for the same developer over a long period or treating them like part of your internal team. The right answer depends on how the relationship works in practice, not just what the contract says.
For most startups, the contract isn't about making things difficult. It's about giving both sides a clear map so the project can move faster with fewer awkward conversations.
Who Owns The Code When You Hire A Freelance Developer?
Usually, the developer owns the copyright in code they create unless they assign it to you in writing.
This is the point that catches many founders by surprise. Under the Copyright, Designs and Patents Act 1988, copyright in original software code generally belongs to the person who creates it. There's a different rule for employees creating work in the course of employment, but a freelancer isn't automatically in that category.
So, if your contract only says the developer will build an app for a fixed fee, that may not be enough to transfer ownership of the intellectual property to your business.
Your contract should clearly deal with:
- Assignment of IP: the developer transfers ownership of the code, documentation and other project materials to your company.
- Timing: whether ownership transfers as work is created, on payment, or when the final milestone is accepted.
- Moral rights: the developer agrees not to object to reasonable changes you make to the work.
- Pre-existing materials: anything the developer already owned before the project stays theirs, but you get a licence to use it as needed.
- Open source software: the developer must disclose open source components and follow the relevant licence terms.
Say Priya runs a SaaS startup and pays a freelance developer £8,000 to build a scheduling tool. Six months later, an investor asks whether the company owns the source code. If Priya only has invoices and email threads, that due diligence process can get uncomfortable very quickly. If she has a signed software development agreement with a clear IP assignment, she can answer confidently.
What Should A Freelance Developer Contract Template Include?
A good developer agreement template should cover the project scope, IP ownership, payment, confidentiality, data protection, testing, support and what happens if either side wants to end the arrangement.
A template can be a useful starting point, especially if you're trying to work out what commercial points to discuss. But software projects vary a lot. A contract for a two-week landing page integration won't look the same as one for a fintech platform handling customer data. A lawyer should tailor the document before you use it.
Fill-In Outline For Your Developer Contract
- Parties: name your company correctly, including the Companies House registered name and company number if you have one.
- Project Description: describe what the developer is building, including platforms, integrations and key features.
- Deliverables: list the code, designs, documentation, repositories, credentials, test results and handover materials.
- Milestones: set dates or stages for delivery, review and approval.
- Fees And Payment: say whether payment is fixed, hourly or milestone-based, and when invoices are due.
- Changes: explain how you approve extra work, extra fees and timeline changes.
- Acceptance Testing: set out how you'll test the work and how defects will be fixed.
- Intellectual Property: transfer ownership of new code and licence any pre-existing tools you need.
- Confidentiality: protect your product roadmap, customer data, pricing, source code and business plans.
- Data Protection: include UK GDPR and Data Protection Act 2018 obligations if the developer handles personal data.
- Warranties: require the developer to use reasonable skill and care and not knowingly infringe third party rights.
- Support And Maintenance: say whether bug fixes, updates or ongoing support are included after launch.
- Termination: explain when either side can end the contract and what must be handed over.
- Dispute Process: set a practical process for escalating issues before they become expensive.
If you're adapting a free template, be careful with clauses copied from overseas documents. US-style terms, Australian terminology or vague IP wording may not fit an England and Wales contract.
How Should Milestones, Payment And Acceptance Work?
Milestones should connect payment to real deliverables, not just the passage of time.
This is especially useful when you're commissioning an MVP or product build. You want the developer to be paid fairly, but you also need enough leverage to make sure the project is delivered properly.
A simple milestone structure might look like this:
- Milestone 1: project setup, technical plan and development environment completed.
- Milestone 2: core feature build delivered to a test environment.
- Milestone 3: user testing fixes completed and documentation supplied.
- Milestone 4: final handover, source code repository access and deployment support completed.
For example, imagine your startup agrees to pay £12,000 for an MVP in four milestones of £3,000 each. Your contract says each milestone is payable within 7 days after you approve the deliverable. It also says you have 5 business days to test each deliverable and list any defects. If you don't respond within that period, the milestone is treated as accepted unless there's an obvious serious issue.
That kind of structure helps both sides. The developer knows when they'll be paid. You know what you should receive before releasing the next payment.
Your contract should also deal with change requests. Software builds almost always change once you see the first version. A good clause says the developer doesn't need to start extra work until you both agree the scope, fee and timing in writing.
Try to avoid vague wording like the app will be finished when it looks good. Instead, use practical tests: the login function works, the dashboard displays specified data, the API connects successfully, or the code passes agreed security checks, with any source code escrow arrangements documented if needed.
How Do You Protect Confidentiality, Data And Your Product Roadmap?
You protect confidentiality and data by limiting what the developer can access, setting clear written obligations and making sure the contract matches how the work will actually be done.
Most software projects involve sensitive information. You might share customer details, analytics, passwords, API keys, pricing models, investor materials or an unreleased product idea. A confidentiality clause should cover information shared before, during and after the project.
It should also say the developer can only use your confidential information for the project and must not disclose it to others without permission. If they use subcontractors, you should approve that first and require those subcontractors to follow matching confidentiality obligations.
If the developer handles personal data for you, UK GDPR and the Data Protection Act 2018 may apply. In many cases, your business will be the controller and the developer will be a processor. If so, you'll usually need data processing clauses covering:
- what personal data the developer can process and why;
- your instructions and security requirements;
- rules for subcontractors;
- help with data subject requests and security incidents;
- what happens to data at the end of the project.
The Information Commissioner's Office expects businesses to take data security seriously, even when using contractors. That doesn't mean every startup needs enterprise-level paperwork. It does mean you should be clear about access controls, password management, repository permissions and deletion of data after handover.
For IP protection, you should also think about trade marks if your developer is building a product under a brand name. A UK trade mark application is filed through the UK Intellectual Property Office, and it can be much easier to protect your product if you check branding early.
What If The Developer Misses A Deadline Or The Code Does Not Work?
If something goes wrong, first check the contract, gather records and speak to the developer in writing before making any big decisions.
Software projects can slip for ordinary reasons. Requirements change, third party APIs break, testing uncovers bugs or your team takes longer than expected to give feedback. The question is whether the delay or defect is manageable, and what your contract says happens next.
What To Do First
- Check The Scope: compare the issue against the agreed deliverables, not just what you hoped the product would do.
- Save The Evidence: keep the signed contract, proposals, invoices, messages, repository history, test results and screenshots.
- List The Problems: separate critical defects from minor fixes and new feature requests.
- Ask For A Remedy: give the developer a clear written list and a reasonable timeframe to respond.
- Pause New Work If Needed: avoid approving more paid work until the current issue is understood.
- Get Help Early: if IP, data, access or payment is becoming messy, tailored advice can help you avoid making the problem worse.
Your contract should set out remedies such as re-performing defective work, fixing bugs within a set support period, handing over incomplete work if the contract ends, or refunding fees for undelivered milestones in limited cases.
If there's no written contract, you may still have rights under general contract law, but the dispute usually becomes more factual. You may need to show what was agreed, what was delivered and why it fell short. That can be time-consuming when the real goal is to get your product launched.
From a practical perspective, the most valuable clauses are often the simple ones: milestone acceptance, handover obligations, source code access and a clear exit process.
How Much Does A Software Development Agreement Cost?
The cost depends on how complex your project is, how much tailoring you need and whether you're using a free template, an online legal service or a traditional firm billing by the hour.
A free template may suit an early conversation, but it can miss deal-specific points like source code ownership, escrow, open source software, developer toolkits, data processing and investor due diligence requirements. The risk is that the document looks official but doesn't answer the questions that matter when things go wrong.
An online fixed-fee legal service can be a good fit if you want a tailored agreement and price certainty. You should expect the service to clarify your project, draft or review the agreement, deal with IP and data clauses, and explain the main risks in plain English.
A traditional firm can be useful for larger or highly technical projects, especially where there are complex software licence arrangements, regulated data, security requirements or cross-border issues. Hourly billing can work well for open-ended advice, but it may be harder to predict the final cost.
When comparing options, ask what is included. A useful software development agreement service should help with:
- scope and deliverable wording;
- IP assignment and licensing clauses;
- milestone payment terms;
- confidentiality and data protection terms;
- handover and termination rights;
- practical comments on how to use the contract.
If you're deciding whether to use a software development agreement solicitor in the UK or an online legal team, the key isn't the label. It's whether the person preparing the document understands software projects and can tailor the contract to your commercial deal.
Key Takeaways
- A written freelance developer contract helps you protect your code, payment structure, confidential information and project timeline.
- In the UK, copyright in freelancer-created code usually needs to be assigned to your business in writing.
- Your contract should cover deliverables, milestones, acceptance testing, change requests, IP, confidentiality, data protection, support and termination.
- UK GDPR and the Data Protection Act 2018 may apply if the developer handles personal data for your business.
- Free templates can be a starting point, but software contracts work best when they're tailored to the actual build.
- If a project goes off track, keep records, check the agreed scope and deal with the issue in writing before it escalates.
If you'd like help with your software development agreement, code ownership clauses, milestone payment terms or confidentiality and data protection documents, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.
Drafted by Taylor, Sprintlaw's AI, and overseen by Alex Solo. How we write
Protect your brand
What intellectual property should you protect?
If a name, logo, design or other creative work matters to the business, check who owns it, what permissions you need and whether clearance or registration is appropriate.
Alex SoloCo-Founder
