A handshake and a Slack channel is not a contract. We have seen too many projects go sideways not because the development was bad, but because the agreement was vague, incomplete, or missing entirely. A software development contract protects both sides: the client who is spending real money and the development team that is committing real time.
Here is every clause that matters, what it should say, and the mistakes we see most often.
Scope of Work
This is the most important section and the one most people get wrong. A good scope of work is specific enough to hold both sides accountable, but flexible enough to accommodate the reality that software requirements change.
What to include:
- A clear list of features and deliverables
- Functional requirements (what the software does)
- Non functional requirements (performance targets, uptime guarantees, supported platforms)
- What is explicitly out of scope
The common mistake: Writing the scope as a vague paragraph instead of a structured list. "Build a mobile app for our business" tells you nothing. "Build an iOS and Android app with user authentication, product catalog, shopping cart, Stripe payment integration, and push notifications" gives both sides a shared target.
If you are not sure how to define the scope, start with a technical requirements document. It will save you from arguments later.
Intellectual Property Ownership
This is non negotiable: the client should own all intellectual property upon final payment. This includes source code, designs, documentation, and any custom components built specifically for the project.
Watch out for these traps:
Pre existing IP. If the development team uses frameworks, libraries, or internal tools they built before your project, those remain theirs. The contract should grant you a perpetual license to use them as part of your product, but you do not own them. This is standard and fair.
Open source components. Most modern software uses open source libraries. Your contract should require the development team to disclose any open source dependencies and their license types. Some open source licenses (like GPL) have restrictions that could affect your product.
Work product vs. tooling. The custom code written for your project is yours. The deployment scripts, testing frameworks, and internal tools the team uses to build it are theirs. Draw the line clearly.
Payment Terms
There are three common payment models, and each carries different risk:
Fixed price. You pay an agreed total for a defined scope. Best for well defined projects where requirements are unlikely to change. The development team bears the risk of underestimating effort.
Time and materials. You pay for actual hours worked at an agreed rate. Best for projects with uncertain scope or ongoing development. You bear the risk of cost overruns, but you get maximum flexibility.
Milestone based. You pay in installments tied to deliverables. Best for medium to large projects. Risk is shared: you never pay too far ahead, and the team gets regular cash flow. This is the model we use for most projects at Veld Systems, and it is what we recommend for most custom software engagements.
Key clauses to include:
- Payment schedule with specific due dates or milestone triggers
- Late payment terms (interest rate, right to pause work)
- What happens if the project is cancelled mid stream
- Any retainer or deposit requirements
Timeline and Milestones
Every contract needs a timeline, but good contracts acknowledge that timelines in software are estimates, not guarantees. Read our piece on why every software project quote is wrong for the full picture.
What to include:
- Projected start and end dates
- Major milestones with target dates
- Dependencies that could affect the timeline (client approvals, third party API access, content delivery)
- A process for handling delays on either side
- Buffer time for testing, bug fixes, and revisions
Critical clause: client response times. If the client takes three weeks to review a milestone that was supposed to take two days, the timeline shifts. Build this into the contract explicitly. We have seen projects delayed by months because the contract did not address client side bottlenecks.
Change Order Process
Requirements will change. It is not a question of if, but when. Your contract needs a formal process for handling changes:
1. Either party submits a change request in writing
2. The development team assesses impact on scope, timeline, and cost
3. Both sides approve the change order before work begins
4. The change order becomes an amendment to the original contract
Without this process, scope creep will destroy your budget and timeline. With it, changes are managed, documented, and priced fairly.
Warranties and Bug Fixes
What happens when something breaks after delivery? The contract should define:
Warranty period. Typically 30 to 90 days after final delivery. During this period, the development team fixes bugs at no additional cost. This covers defects, not new features and not changes to requirements.
Definition of a bug. A bug is the software not performing according to the agreed specifications. A feature request disguised as a bug report is one of the most common sources of post project conflict. Define it upfront.
Post warranty support. After the warranty period, bug fixes and updates should be covered by a separate maintenance agreement. This is often a monthly retainer that covers a set number of support hours.
Confidentiality and Non Disclosure
Both sides will share sensitive information during the project. The contract should include mutual NDA terms covering:
- Business strategies, financial data, and trade secrets
- Source code and technical documentation
- User data and customer information
- Any proprietary processes or algorithms
The confidentiality obligations should survive the end of the contract, typically for 2 to 5 years after project completion.
Termination Clauses
Projects get cancelled. Businesses pivot. Budgets get cut. Your contract needs a clean exit plan:
For cause termination. Either party can terminate if the other materially breaches the contract and does not cure the breach within a specified period (usually 15 to 30 days).
For convenience termination. Either party can terminate without cause with written notice (usually 15 to 30 days). The client pays for all completed work and work in progress.
Deliverables upon termination. Regardless of why the project ends, the client receives all completed code, documentation, and deliverables they have paid for. This is critical. You should never be locked out of your own product.
Dispute Resolution
Nobody plans for disputes, but the contract should have a process anyway:
Escalation path. Start with good faith negotiation between project leads, then escalate to executives.
Mediation before litigation. Require mediation before either party can file a lawsuit. Mediation is faster, cheaper, and resolves most disagreements.
Jurisdiction and governing law. Specify which state or country's laws apply. This matters more than you think, especially with offshore development teams.
Clauses Most People Miss
Source code escrow. If you are working with a vendor who hosts and maintains your product, what happens if they go out of business? A source code escrow agreement ensures you can access your code if the vendor disappears.
Non solicitation. Prevents either side from poaching the other's employees for a specified period (usually 12 months). This protects the development team and gives the client confidence that their vendor will not recruit their internal staff.
Compliance requirements. If your industry has specific regulations (HIPAA, PCI DSS, GDPR), the contract should require the development team to build in compliance from the start, not bolt it on later.
Subcontracting. Can the development team bring in subcontractors? If so, under what terms? The contract should require disclosure and ensure subcontractors are bound by the same confidentiality and IP terms.
Get It Right Before You Start
A good contract is not adversarial. It is a shared understanding that prevents misunderstandings from becoming disputes. Both sides should feel protected and clear on expectations.
If you are about to start a software project and want to make sure the agreement is solid, talk to us. We have been on both sides of these contracts and know exactly which clauses matter in practice, not just on paper.