A software development contract is as important to your project as the code itself. Nobody reads it while things are going well, but when there is a delay, a scope dispute or a change of vendor, everything depends on what it says. This article covers the key clauses to get right, with a focus on source code ownership, maintenance and SLAs.
Please note: this is general information, not legal advice. Laws differ by country, so have a lawyer experienced in technology contracts review your agreement before you sign.
How a software development contract is usually structured
Most agreements have two layers: a master services agreement covering general rights and obligations, and a statement of work for each project or phase detailing scope, deliverables and timeline. This lets you start a new phase by adding a statement of work instead of renegotiating everything.
A definitions section matters too: it makes sure terms like delivery, defect and acceptance mean the same thing to both parties. For cross-border work, also agree on governing law and jurisdiction.
8 clauses to get right
1. Scope and statement of work
State what will be built and what will not: platforms, features, integrations, supported devices and browsers, and documentation. Vague scope is the most common source of disputes.
2. Source code ownership and IP
Spell out who owns the source code, designs and documentation, and when ownership transfers, often upon payment. Many jurisdictions require IP assignments to be in writing and specific. Also check how the vendor's pre-existing components and open-source libraries are handled; these are usually licensed rather than assigned.
3. Acceptance testing
Define what "done" means: the testing window after each delivery, how defects are reported and what happens if no feedback is given in time.
4. Payment schedule
Tying payments to milestones balances risk for both sides. Clarify which deliverable triggers which payment, the currency and any exchange rate terms.
5. Change management
Scope will change. Define how change requests are submitted, estimated and approved, and how they affect timeline and cost.
6. Warranty and maintenance
A warranty period in which the vendor fixes its own defects at no cost is common. After that, a maintenance agreement should define updates, security patches, small improvements and any monthly hour allowance.
7. SLA (service level agreement)
An SLA defines how quickly the vendor responds and works on issues. The table below is an illustrative structure only; real targets depend on how critical the system is and on budget.
| Priority | Definition | Example response time |
|---|---|---|
| Critical | System down, business stopped | Within a few hours |
| High | Major feature broken, no workaround | Same business day |
| Medium | Bug with a workaround | Within a few business days |
| Low | Cosmetic issues or small requests | Next planned maintenance cycle |
Make sure the SLA separates response time from resolution time, states the covered hours and explains what happens if targets are missed.
8. Confidentiality, data protection and termination
Confidentiality protects both parties. If the software processes personal data, the roles of each party and the required safeguards under applicable data protection law (such as GDPR or Turkey's KVKK) should be defined. The termination clause should cover when either party may exit, how completed work is paid for and how code, documentation and credentials are handed over.
In practice, the process usually starts from the vendor's standard agreement. Read it against your own needs and send requested changes in writing; a reasonable vendor will negotiate on topics like code ownership, acceptance and maintenance. Rushing the contract because you are eager to start often leads to far longer disputes later.
Common contract mistakes
- Leaving scope in meeting notes or email threads
- Covering IP with a single vague sentence
- Postponing maintenance terms until after launch
- Saying nothing about handover on termination
Pre-signing checklist
- Whose name are the repository and cloud accounts under?
- Are assigned and licensed components listed separately?
- Is the acceptance process defined?
- Are the warranty period and maintenance scope written down?
- Are SLA targets and covered hours clear?
- Are handover obligations on termination listed?
- Has a lawyer reviewed the text?
Planning a long-term engagement? See how we structure it on our outsource software team page, or read about project work on our web development page.
At BernSoftware we keep source code in client-controlled repositories and put scope and maintenance terms in writing from day one. Get in touch to discuss your project.
Frequently asked questions
Is receiving the source code the same as owning it?
No. Having a copy of the code does not necessarily give you the right to modify, reuse or have another vendor develop it. The contract should state clearly which rights are assigned or licensed to you.
What is source code escrow and do I need it?
Escrow means the code is held by an independent third party and released to you in defined situations, such as the vendor ceasing operations. If the code already lives in your own repository, escrow is usually less necessary.
Is a contract template good enough?
Templates are a useful starting point, but every project has different scope, risks and expectations. Adapting the template to your project and having a lawyer review it is the safest way to avoid future disputes.
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