You’ve got an app idea, a new website to launch, or a custom software tool your business really needs. You’ve found a developer (or a dev agency), you’re excited, and you’re ready to get started.
Then the tricky question hits: what contract do you actually need?
This matters more than most people realise. A development project usually involves deadlines, milestones, changing requirements, access to sensitive data, and a big question at the end: who owns the code?
This guide is updated for current expectations around tech projects and data handling, so you can feel confident you’re setting things up properly from day one (without drowning in legal jargon).
Why You Need A Proper Developer Contract (Even If You Trust Them)
If you’re working with a developer without a clear agreement in place, you can run into issues like:
- Scope creep: you asked for “a simple feature”, but you end up with a much bigger build (and bigger invoices).
- Delays and missed launches: without milestones and accountability, it’s hard to know what’s “late” and what’s “normal”.
- IP confusion: you might assume you own the code because you paid for it, but that’s not always how IP works.
- Disputes over payment: the developer expects to be paid for time spent; you expect to be paid-for outcomes.
- Data and privacy risk: developers often access customer data, analytics, or internal systems, and that can trigger obligations under the Privacy Act 2020.
A well-drafted contract helps you avoid awkward conversations later, because it sets expectations upfront. It’s not about distrust - it’s about running your project like a business.
As a rule, you want the agreement to answer:
- What exactly is being built?
- How long will it take?
- How much will it cost (and when is payment due)?
- What happens if something goes wrong?
- Who owns the intellectual property (including source code)?
Is The Developer A Contractor Or An Employee (And Why It Changes The Contract)
The first decision isn’t “which contract template do I download?” It’s working out what the working relationship actually is.
In most software projects, your developer will be an independent contractor (or a company). That usually points you toward a service-style contract, rather than an employment agreement.
When A Contractor Agreement Makes Sense
A contractor arrangement is common where the developer:
- works on a project basis
- uses their own tools and systems
- sets their own hours
- can work for other clients
- invoices you for time, milestones, or deliverables
In that case, you’ll typically want a Contractor Agreement (or a broader service agreement structure) that covers deliverables, IP, confidentiality, and payment terms.
When An Employment Contract Might Be Required
If you’re hiring a developer to work ongoing hours in your business (and you control their day-to-day work), they may legally be an employee - even if you call them a “contractor”. If the relationship looks and behaves like employment, you can expose your business to disputes and compliance issues.
Where it’s genuinely employment, an Employment Contract is the better fit (and you’ll also need to think about holiday/sick leave and other minimum entitlements).
If you’re unsure, it’s worth getting advice early - misclassification is a classic “small problem now, expensive problem later”.
Which Contract Do I Need For A Development Project?
There isn’t only one “developer contract”. In practice, the right setup depends on your project size, whether you’re working with a freelancer or an agency, and how important IP and data security are to your business.
Here are the most common contract options (and when each one fits).
1) Service Agreement (Project-Based Development)
If you’re paying a developer to deliver a defined project (for example: “build our Shopify theme customisations” or “create an iOS app MVP”), a service agreement is often the core document.
It should cover:
- Scope of work: what’s included (and what’s not).
- Deliverables: what you’ll actually receive (e.g. code repo access, design files, documentation).
- Milestones and acceptance: how you test and sign off work.
- Fees and payment terms: fixed fee vs time-based, and invoicing schedule.
- Change requests: how variations are approved and priced.
- Warranties: baseline commitments about quality and non-infringement (where appropriate).
- Termination: how either party can end the agreement, and what happens to partially completed work.
Many businesses use a tailored Service Agreement for development because it’s flexible enough to suit different project styles while still being enforceable and clear.
2) Statement Of Work (SOW) For Each Phase Or Sprint
Even when you have a main service agreement, you’ll often want a Statement of Work for each stage (for example: discovery, build, testing, launch, ongoing support).
A SOW usually includes the practical details that change from phase to phase, such as:
- specific features and functionality
- timeline for that phase
- milestones and payment triggers
- assumptions and dependencies (e.g. “client provides branding by X date”)
This approach keeps your legal foundation stable while letting the project evolve without constant contract rewrites.
3) Master Services Agreement (MSA) For Ongoing Development
If you’re planning an ongoing relationship (monthly development, continuous improvement, maintenance and support), an MSA-style structure can work well.
Think of it like this:
- The MSA sets the legal rules of the relationship (IP, confidentiality, liability, disputes, termination).
- Each SOW sets the commercial and technical details of the next piece of work.
This can be a great option for startups and growing businesses because you avoid renegotiating core legal terms every time you add a new feature.
4) NDA (Non-Disclosure Agreement) Before You Share The Idea
Sometimes you’re not ready to send your developer full project details yet - especially if your value is in the concept, the customer list, the business model, or the roadmap.
An NDA can help protect confidential information you share during:
- early conversations
- quotes and proposals
- demo access
- investment-style pitch decks you’re repurposing for the build
Not every project needs a standalone NDA (confidentiality can be built into the main contract), but it’s useful where you’re disclosing sensitive information before you’ve agreed the full commercial deal.
5) Software Licence Agreement (When You’re Licensing, Not Buying)
Not every development relationship is “we pay you, we own it”. Sometimes the developer is offering a product they already built, and you’re getting a licence to use it (with or without customisations).
In that case, you’re not really commissioning bespoke work - you’re entering into licensing terms, which often cover:
- what you can and can’t do with the software
- how long you can use it
- subscription fees
- restrictions on copying or reselling
- support and updates
If your project involves licensing, a Software Licence Agreement is often the right tool - and it should be aligned with how your business actually operates (especially if you’re building something customer-facing).
What Clauses Matter Most When You’re Working With A Developer?
It’s easy to focus on price and timeline. But with development projects, the “legal fine print” often decides whether the project is a success when things get messy (and sometimes they do).
Here are the clauses we commonly see make the biggest difference.
Scope, Deliverables, And Change Control
This is your best defence against scope creep.
Your contract should make it clear:
- what features are included
- what’s excluded (even if it sounds obvious)
- what counts as a “change request”
- how changes are approved (e.g. in writing)
- how changes affect fees and deadlines
If you can’t describe the scope perfectly on day one, that’s normal - just make sure your contract explains how scope evolves.
Intellectual Property (IP): Who Owns The Code?
This is one of the most misunderstood parts of working with developers.
In plain terms: paying for development doesn’t automatically guarantee you own all IP rights in the output. Ownership depends on what the agreement says and what was created.
Your contract should deal with:
- Background IP: tools, libraries, frameworks, and pre-existing code the developer already owns.
- Project IP: the specific deliverables created for your project.
- Open-source components: whether they’re used, and what obligations come with them.
- Assignment vs licence: whether you’re receiving ownership (assignment) or permission to use (licence).
As a practical example: if you’re building a core product for your business (like a SaaS platform), you’ll usually want strong IP ownership rights so you can scale, raise capital, and potentially sell the business later without loose ends.
Developers often access sensitive information, such as:
- customer databases
- payment system integrations
- admin access to your website
- business financials or internal reporting
Your contract should require confidentiality and set clear expectations around secure handling of data. If personal information is involved, your business will likely have obligations under the Privacy Act 2020 to protect it and to ensure third parties you use don’t undermine your compliance.
In many cases, your external-facing documents also need to match your internal reality - for example, if your product collects user data, a properly drafted Privacy Policy is a key part of being transparent with customers.
Testing, Bug Fixes, And Acceptance Criteria
A common dispute is: “the developer says it’s done, but it doesn’t work how we expected.”
You can reduce this risk by including:
- acceptance criteria: what “working” means (ideally tied to the scope)
- UAT period: a user acceptance testing window
- bug definitions: what counts as a bug vs a change request
- warranty period: a period where bugs are fixed at no extra cost (as agreed)
This keeps everyone aligned and makes handover smoother.
Payment Structure And Leverage
From a risk-management perspective, milestone-based payments are common because they keep both sides invested.
Options include:
- deposit + milestone payments: pay as features are completed
- time and materials: hourly/daily rate with regular invoicing
- fixed fee: clear price, but only works if scope is genuinely clear
It’s also worth thinking about what happens if the project pauses: will there be holding fees, kill fees, or charges for re-starting later?
Liability, Indemnities, And “What If Something Goes Wrong?”
This part can feel uncomfortable, but it’s crucial.
Your contract should deal with things like:
- caps on liability (and what they are based on)
- exclusions (e.g. lost profits, indirect loss)
- who is responsible if third-party IP is infringed
- who bears the risk for security incidents or data loss (and to what extent)
There’s no one-size-fits-all answer here. The right settings depend on the nature of the project, the risks, and your bargaining position - which is exactly why getting the agreement tailored is so important.
Common Scenarios (And The Contract Setup That Usually Works Best)
If you’re still wondering what to choose, these examples may help you narrow it down.
You’re Hiring A Freelancer To Build A Website
Common setup:
- Service Agreement with a clear scope and payment milestones
- IP clause that confirms what you own (and what’s licensed)
- Confidentiality and handover obligations (admin access, logins, documentation)
If the site collects leads, bookings, or customer accounts, privacy and data handling terms become more important.
You’re Building An MVP App For A Startup
Common setup:
- MSA + SOW (especially if you’re iterating fast)
- Strong IP assignment for project-specific code
- Clear acceptance criteria and bug-fix period
- Confidentiality and security commitments
If you have a co-founder team, it’s also worth aligning ownership internally so your cap table and IP story are clean - for example, with a Founders Agreement.
You’re Outsourcing Development While Running A Growing Business
Common setup:
- MSA for ongoing work
- SOW per month/quarter
- Support and maintenance terms (response times, urgent fixes)
- Security and confidentiality protections
If you’re also hiring internally (for example, a product manager or support staff), make sure your internal documents keep pace too - including the right Staff Handbook policies around systems access and confidentiality.
You’re Using A Developer To Build A Product You’ll Sell To Customers
Alongside your developer agreement, you’ll likely also need customer-facing legal documents, such as:
- website or app terms
- privacy disclosures
- subscription terms (if applicable)
- acceptable use rules (if users can upload content or interact)
Your customer terms often end up relying on promises made by your tech stack - so it’s important your developer contract supports what you’re promising externally (including uptime, security expectations, and functionality).
Key Takeaways
- The right contract depends on the relationship - a developer might be a contractor, an agency, or (in some cases) an employee, and each needs a different legal setup.
- A service agreement is the most common starting point for project-based development because it can clearly set scope, milestones, fees, and deliverables.
- For ongoing development, an MSA + SOW structure is often the cleanest approach, letting you update project details without renegotiating core legal terms every time.
- IP ownership should be made crystal clear, including how background IP, project IP, and open-source components are handled.
- Confidentiality and data handling aren’t optional when developers access customer or business information, especially under the Privacy Act 2020.
- Don’t rely on generic templates - developer agreements need to match your commercial reality, your product plans, and your risk profile.
If you’d like help choosing (or drafting) the right contract for your development project, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
