Corporate Website Project Brief: The Complete 2026 Checklist

The verdict in three sentences

An incomplete project brief is the number-one cause of change orders and delays on a corporate website: it quietly turns a fixed price into open-ended time-and-materials. A strong 2026 brief runs 15 to 40 pages, covers 8 key sections and locks content governance before design is even discussed. Spending 3-5 days writing it upfront saves 15-30% of budget drift on an 8,000-18,000 EUR project.

The 8 sections of a corporate brief that holds

An RFP that attracts good agencies describes the what (goals, scope, constraints) without freezing the how (exact technical choices). Here is the expected structure and 2026 page volumes.

Section 3 is the one 80% of briefs omit: without a multi-level approval workflow (writer → approver → publish), a 200-employee group ends up with an unmanageable site three months after go-live.

Budget and deliverables by phase

A credible brief ties each phase to a dated, enforceable deliverable. That is what protects both sides.

A premium corporate site (20,000-45,000 EUR) adds a client portal, 3+ languages and ERP/CRM integration. The timeline moves from 10-16 weeks to 16-24 weeks. WCAG 2.1 AA is non-negotiable in 2026 for any public-facing or para-public organisation.

Mini case study

Sophie, communications director of a 350-employee industrial group in Lyon, must run an RFP to rebuild a 45-page FR/EN site. Without a formal brief, her last two rebuilds generated 6 change orders worth +9,400 EUR. This time she spends 4 days writing a 28-page brief (estimated internal cost: 1,600 EUR). Result: across 5 shortlisted agencies, quotes land in an 11,000-15,500 EUR band instead of 8,000-24,000 EUR, and the project ships with zero change orders. Estimated net saving: 7,800 EUR and 5 weeks.

FAQ

Should the brief mandate the technology (WordPress, headless)? No: describe the governance need and let the agency propose. Over-specifying scares off the best agencies and pushes price up 10-20%.

How many pages should an institutional brief be? Between 15 and 40 pages in 2026. Below 12 pages the scope stays vague and quotes become incomparable; above 45 you freeze the how too tightly.

Is WCAG accessibility really mandatory? For public bodies and public-service delegates, yes, with a conformance statement. For a private company it is a quality standard and a legal safeguard: budget 800-1,800 EUR for an audit.

How do I stop content from delaying the project? Put a content-delivery deadline and a migration plan in the brief. Late content extends a project by 22% on average.

Should I state a budget in the brief? Give an envelope (order of magnitude) rather than a fixed figure: it frames responses without stifling innovation and filters out off-target bids.

Let's scope your project. Send us your sitemap and constraints (languages, CMS, accessibility) and we will frame the scope and indicative budget of an 8-45k EUR corporate site. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.