Free software development agreement template
with every clause that protects both sides.

Why it matters: Courts require identifiable parties with legal capacity for contract formation. A personal name where a business entity should sign, or a signatory without authority to bind the company, can void the agreement or direct liability to the wrong person — a significant concern in software deals that may involve asset acquisition or investor due diligence.

What Clausio checks: That both parties are identified by legal name, that any company is identified as a legal entity (LLC, Corp, etc.), and that the signatory role is specified.

Legal basis: Restatement (Second) of Contracts §§ 9, 12–17 (1981) — contract formation requires identifiable parties with legal capacity; lack of capacity renders the contract voidable. [Confidence: medium — Restatement is widely adopted persuasive authority; ALI text is paywalled]

Why it matters: Vague scope is the primary cause of software project disputes. Without a written specification defining features, technology stack, platforms, and what is explicitly out of scope, a client may request features the developer never agreed to build — and courts will construe ambiguities against the drafter.

What Clausio checks: That deliverables are described with sufficient specificity (feature list, technology stack, and target environments), that out-of-scope items are identified, and that a change-order process for new requirements is defined.

Legal basis: Restatement (Second) of Contracts §§ 201–203 (1981) — ambiguities in a standardized agreement are construed against the party who supplied the language (contra proferentem). [Confidence: medium — Restatement persuasive authority]

Why it matters: Software projects paid entirely on final delivery leave the developer unpaid for months of work if the client cancels or disputes the result. Milestone payments — tied to defined deliverables (design complete, beta build, final delivery) — create checkpoints where both sides confirm progress and money changes hands incrementally.

What Clausio checks: That milestones are listed with specific deliverables and payment amounts, that a deposit is required before work begins, and that late-payment consequences are specified.

Legal basis: Restatement (Second) of Contracts § 347 — measure of damages for breach is the expectation interest. NYC developers on contracts over $800 may also have rights under the NYC Freelance Isn't Free Act (N.Y.C. Admin. Code § 20-928). [Confidence: medium for Restatement; NYC statute high]

Why it matters: This is the most consequential clause in any software development contract. Standalone software written by an independent contractor does not qualify as a work made for hire under US copyright law — the nine enumerated categories in 17 U.S.C. § 101 do not include general software development. Without a written copyright assignment, the developer retains copyright in the entire codebase, regardless of payment. Clients who discover this during due diligence for a funding round or acquisition face serious delays.

What Clausio checks: Whether the contract includes a written copyright assignment triggered on full payment, and whether the developer's pre-existing code, open-source components, and internal libraries are explicitly excluded from the assignment and licensed (not assigned) to the client.

Legal basis (high confidence): 17 U.S.C. § 101 — a commissioned work is a "work made for hire" only if it falls within one of nine statutory categories AND a signed written instrument designates it as such. Standalone software by an independent contractor does not fall within these categories — a written copyright assignment is required. 17 U.S.C. § 204(a) — any transfer of copyright ownership must be in writing and signed; oral agreements do not transfer copyright. Community for Creative Non-Violence v. Reid, 490 U.S. 730 (1989) — an independent contractor's work does not automatically vest copyright in the hiring party.

Why it matters: Developers routinely incorporate their own reusable libraries, third-party frameworks, and open-source components into client projects. If these are swept into a copyright assignment without a carve-out, the developer may inadvertently assign away tools they use across every client project. Open-source components with copyleft licenses (e.g., GPL) can also impose obligations on the client's codebase that the client is unaware of until a compliance issue arises.

What Clausio checks: That the developer's pre-existing code is identified and excluded from the assignment, that a license for the client to use pre-existing code in the deliverable is granted, and that open-source components and their license types are disclosed.

Legal basis: General copyright principles — each copyrightable work has its own author and ownership. Pre-existing code is separately owned; its use in a new deliverable requires an express license if not assigned. Open-source copyleft licenses (e.g., GNU GPL v3) impose specific conditions on derivative works; undisclosed inclusion can affect the client's ability to distribute or commercialize the software. [Confidence: medium — general copyright principles; specific open-source license obligations require license-specific analysis]

Why it matters: Without acceptance criteria, a client can delay final payment indefinitely by claiming the software does not work — without specifying what "works" means. Conversely, without a deemed-acceptance provision, a developer who delivers conforming software may still be waiting for sign-off months later while the client uses the product in production.

What Clausio checks: That a testing window is specified, that a defect vs. new-feature distinction is defined, that a remediation period for genuine defects is included, and that the software is deemed accepted if the client does not raise written objections within the testing window.

Legal basis: Restatement (Second) of Contracts §§ 50, 58 — acceptance is required for performance to be complete; a deemed-acceptance clause creates a contractual standard for timely client action. UCC § 2-209 — modifications to accepted terms require signed writing; the acceptance procedure in the contract governs when performance is deemed complete. [Confidence: medium — Restatement persuasive authority; UCC Article 2 applies most directly to goods; applicability to software services varies by jurisdiction]

Why it matters: Without a warranty clause, a developer who delivers software with latent bugs may face open-ended obligations to fix them — or conversely, may argue they owe nothing because the contract was complete on delivery. A written warranty period (typically 30–90 days) defines the window during which the developer will fix defects in delivered code at no charge, and what falls outside that obligation.

What Clausio checks: That a warranty period is defined, that the scope of warranty (conformance to specification, not fitness for a particular purpose) is stated, and that the warranty excludes defects caused by client modifications or third-party integrations.

Legal basis: General contract law — implied warranties may arise under state law absent a written disclaimer. UCC § 2-316 — parties may disclaim implied warranties in writing; for services contracts, analogous principles apply under common law. A written warranty clause replaces open-ended implied obligations with a defined scope and time limit. [Confidence: medium — UCC warranty principles apply most directly to goods; applicability to software services contracts varies by jurisdiction and how the contract is characterized]

Why it matters: Developers routinely work with unreleased product roadmaps, API architecture, proprietary algorithms, and business-critical technical specifications. Without a confidentiality clause, the client's only remedy for disclosure is trade secret law — harder to enforce than a written contractual obligation and requiring proof that the information qualifies as a trade secret.

What Clausio checks: That confidential information is defined, the developer's obligations are stated, and a DTSA whistleblower-immunity notice is included (required to preserve eligibility for exemplary damages and attorney's fees under 18 U.S.C. § 1833(b)).

Legal basis (high confidence): Defend Trade Secrets Act (DTSA), 18 U.S.C. § 1836 — federal civil cause of action for trade-secret misappropriation; remedies include injunctions, actual damages, and up to doubled damages for willful misappropriation. 18 U.S.C. § 1833(b) — parties entering confidentiality agreements must provide written notice of DTSA whistleblower immunity; failure forfeits eligibility for exemplary damages and attorney's fees. Uniform Trade Secrets Act (UTSA) — adopted by 48 states and DC.

Why it matters: Misclassifying a developer as an employee triggers retroactive payroll tax and benefits liability. Separately, a liability cap is essential in software contracts: a bug in delivered code could cause the client data loss, downtime, or lost revenue far exceeding the development fee. Courts generally enforce mutual liability caps in commercial software contracts.

What Clausio checks: That IC status is documented with the relevant behavioral, financial, and relationship factors, and that a mutual liability cap (typically the total contract price) with exclusion of consequential, indirect, and lost-profit damages is present.

Legal basis (high confidence): IRS Common-Law Test — behavioral control, financial control, type of relationship. IRS guidance. California: ABC test (Lab. Code § 2750.3 / AB5). UCC § 2-719 — parties may contractually limit or exclude consequential damages unless unconscionable; limitation of commercial consequential damages is not prima facie unconscionable.

Why it matters: Without a governing-law clause, courts apply conflict-of-laws rules that may select a state whose IC classification rules, trade secret remedies, or software-warranty law differ from what both parties expected. Without a dispute resolution clause, a $20,000 software development fee dispute defaults to state-court litigation.

What Clausio checks: That governing law and venue are specified, and that a dispute resolution mechanism (arbitration, mediation-first, or court) is named.

Legal basis: Restatement (Second) of Conflict of Laws § 187 (1971) — courts enforce the parties' chosen governing law unless the chosen state has no substantial relationship to the transaction. [Confidence: medium]
Federal Arbitration Act, 9 U.S.C. § 2 (high confidence) — a written arbitration clause "shall be valid, irrevocable, and enforceable" save for standard contract defenses (fraud, unconscionability, duress).