Interactive CSRD Sustainability Report Website: Cost and Scope (2026)

The verdict in three sentences

For a European mid-cap subject to the CSRD, turning a 120-page PDF into an interactive sustainability report costs €15,000 to €35,000 as a dedicated microsite, or €8,000 to €18,000 integrated into the existing corporate site. The real savings come from annual updates at €4,000 to €9,000, since templates, ESRS charts and data exports are reused year after year. The project must follow the auditors' calendar, going live after the independent assurance provider signs off.

Dedicated microsite or corporate site integration

The PDF remains the reference document filed with the management report. The interactive report serves another purpose: making data readable for key account customers, banks, candidates and public buyers who send increasingly detailed ESG questionnaires.

Integration suits a 300 to 1,000 employee company whose corporate site already runs on a modern CMS. A dedicated microsite is the right call for a multi-site group that wants to publish indicators per plant and track a decarbonisation pathway over several years.

Accessibility, eco-design and data

A sustainability report weighing 8 MB per page contradicts its own message. Technical requirements belong in the brief from day one.

Every chart must be readable without a mouse and without colour: a data table alternative is often enough to meet accessibility rules and also helps analysts who want to copy the figures.

Typical calendar for an April publication

The sustainability statement is published with the management report. For a 31 December year end, web work starts in January on structure and templates, using the previous year's data. Final figures arrive in March, the assurance opinion in late March or early April, and the site goes live within 5 to 10 business days. Preparing templates early avoids a last-minute rush.

Mini case study

Isabelle, head of sustainability at an 850-employee food manufacturer near Lille, used to publish a 124-page PDF laid out by an agency for €11,000 a year and downloaded 340 times. She opts for a corporate site integration at €14,000, then €5,000 per annual update. Over three years, total cost reaches 14,000 + 5,000 + 5,000 = €24,000, versus €33,000 for three designed PDFs. The sales team reuses the pages and exports directly to answer retailers' ESG questionnaires, saving about 60 hours a year.

FAQ

Does the interactive report replace the regulatory PDF?

No, the statement filed with the management report remains mandatory. The interactive version complements it and can carry 100% of its content with clearer navigation.

How much does the annual update cost?

Expect €4,000 to €9,000 depending on the number of charts and pages. That is 40 to 60% cheaper than the first edition, because templates are reused.

How long does a first edition take?

Between 6 and 14 weeks depending on the format. Starting in January allows an April launch, a few days after assurance.

Should the report be translated?

For a company exporting more than 20% of its revenue, yes. Professional translation of the web content costs €2,500 to €6,000.

How do we make charts accessible?

Each chart comes with a data table readable by screen readers and compliant contrast. This work accounts for 10 to 15% of the budget.

Let's scope your project. We scope your interactive sustainability report (ESRS charts, scopes 1-2-3, accessibility, eco-design) within €8,000 to €35,000, with a schedule aligned on your assurance date. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.