The EU’s Omnibus I package has cut the number of companies caught by the Corporate Sustainability Reporting Directive (CSRD) by roughly 90%. For UK businesses, that has turned the question around. It is no longer “how do we comply?” but “do we need to, and if so, who should help us?”
Getting that second answer wrong is expensive. Pick a provider that is too big and you pay strategy rates for data entry. Pick one that is too thin and you are left holding the double materiality assessment, the evidence trail and the assurance questions on your own.
This guide covers which UK companies genuinely need CSRD compliance support in 2026, the five types of provider on the market, where each one wins, and the core services a credible partner should deliver. It is written to be used: bookmark the checklists and take them into your next procurement conversation.
Which UK companies need CSRD support?
The revised directive (EU) 2026/470 was published in February 2026 and is now final. UK businesses fall into one of four positions.
1. UK groups with a large EU subsidiary. An EU entity with more than 1,000 employees and over €450 million net turnover is in scope in its own right. These companies report on financial year 2027 data, published in 2028.
2. UK parent groups with significant EU revenue. A non-EU group is in scope where it generates more than €450 million in EU turnover and has an EU subsidiary or branch with over €200 million in revenue. First reports cover FY2028 and are due in 2029. EFRAG estimates around 1,200 non-EU companies remain in scope worldwide, of which 150 to 200 are UK businesses. These groups will report under a dedicated non-EU standard (N-ESRS), which focuses on impacts rather than financial risks and opportunities.
3. Former Wave 1 reporters that have dropped out of scope. If your EU entities already reported but now sit below the new thresholds, you may be able to pause reporting for FY2025 and FY2026, depending on how the relevant member state transposes the rules by March 2027.
4. Suppliers to in-scope companies. This is the largest group, and the one most often overlooked. Your customers still need Scope 1, 2 and 3 data from their value chain. The new rules cap what they can demand from companies under 1,000 employees at the level of the voluntary SME standard (VSME), but the questionnaires are not going away.
If you are in positions 1 or 2, you need a full CSRD compliance programme. If you are in position 4, you need credible, audit-ready carbon data that answers customer requests quickly. Those are very different buying decisions, and they point to different types of provider.
The five types of CSRD compliance provider
Big 4 and large audit firms. They bring global reach, deep ESRS technical knowledge and credibility with boards and investors. They are the natural fit for listed multinationals that want sustainability reporting integrated with financial reporting. The trade-offs are cost, junior-heavy delivery teams, and independence rules: the firm that assures your report cannot also prepare it.
Management and strategy consultancies. Strong on governance, transition planning and organisational change. Useful when CSRD is one strand of a wider transformation. Less useful for the repetitive work of collecting, cleansing and evidencing data every year.
Specialist sustainability consultancies. Real depth on double materiality, ESRS topic standards and value chain mapping. Quality varies widely. Some are small teams that subcontract specialist work or rely on third-party software they do not control, so ask who actually does the analysis.
Software-only platforms. The lowest cost per year and often good at data capture. They win when you already have an experienced in-house sustainability team that only needs a tool. They lose when you need judgement: materiality decisions, methodology choices and assurance responses still sit with you, supported by a helpdesk.
Hybrid providers (platform plus in-house experts). A single provider that owns both the technology and the consultants who use it. This model suits medium to large UK businesses that need accurate data and expert sign-off without building a large internal team. The test is whether the experts are genuinely in-house, and whether the platform is built and maintained by the same company.
Provider comparison at glance
| Provider type | Best for | Typical cost | Who does the work | Main watch-out |
|---|---|---|---|---|
| Big 4 and large audit firms | Listed multinationals, investor-facing reporting | Highest | Mixed seniority teams | Cannot assure what they prepare |
| Management consultancies | CSRD as part of wider transformation | High | Strategy consultants | Limited ongoing data support |
| Specialist sustainability consultancies | Complex materiality and value chain work | Medium to high | Varies; check for subcontracting | Inconsistent tooling |
| Software-only platforms | Experienced in-house teams | Lowest | You, with a helpdesk | Judgement calls stay with you |
| Hybrid platform plus in-house experts | Medium to large UK businesses wanting one accountable partner | Medium, often a fixed fee | Named in-house consultants | Check experts are genuinely in-house |
Whichever route you choose, you will still need an independent assurance provider for limited assurance. Treat that as a separate appointment.
Core services to expect from a credible CSRD partner
The Commission adopted the simplified ESRS in July 2026, cutting mandatory data points by around 60%. Fewer data points does not mean less rigour. A credible partner should cover all of the following.
- Scoping and applicability assessment. A clear, documented view of which entities are in scope, under which standard (ESRS or N-ESRS), and from which year.
- Double materiality assessment. Identifying which impacts, risks and opportunities are material, with the reasoning written down for your assurer.
- Gap analysis against ESRS. What you already hold from SECR, ESOS, TCFD or UK SRS work, and what is missing.
- Scope 1, 2 and 3 emissions accounting. Calculated with recognised methodologies and current emission factors, with a full audit trail back to source data.
- Value chain data collection. Supplier engagement that respects the VSME cap for smaller suppliers but still gets you usable Scope 3 data.
- Report drafting and digital tagging. Disclosures structured for the management report and ready for machine-readable tagging.
- Assurance readiness. Evidence files, controls and methodology notes your assurer can test without weeks of back-and-forth.
- Ongoing regulatory monitoring. Member state transposition runs to March 2027 and N-ESRS is still in development. Your partner should flag changes before they affect you.
One point worth stressing: CSRD rarely sits alone. The same emissions data feeds SECR, ESOS, Science Based Targets, PPN 006 Carbon Reduction Plans and customer questionnaires. A partner who collects it once and reuses it across every obligation saves more time than any single report.
Questions to ask before you sign
Use these in your tender or shortlisting calls. Vague answers are a signal in themselves.
- Who specifically will work on our account, and are they employees or subcontractors?
- Will we have a named consultant, or a shared support inbox?
- Do you build and maintain your own platform, or license someone else’s?
- How many compliance reports have you delivered, and have any failed or been rejected?
- What is your audit or challenge rate, and how does it compare with the industry average?
- How do you handle methodology changes, such as the move to simplified ESRS?
- Can the same data be reused for SECR, ESOS and customer requests without extra fees?
- What does the full cost look like over three years, including data uploads, users and sites?
- How quickly can you turn round a report once our data is complete?
- What proportion of clients renew with you each year?
How Enistic supports CSRD compliance
Enistic is a hybrid provider, and we can answer every question above with a number.
- Experience: carbon compliance since 2002, with more than 5,000 reports delivered and a 100% compliance record.
- In-house expertise: our ESOS Lead Assessors, carbon consultants and auditors are all employed by us. Nothing is outsourced.
- A named consultant: someone who knows your business and becomes part of your team, not a helpdesk.
- Our own AI platform: built in-house, it reduces the data collection burden across multi-site, multi-user and multi-language estates.
- Fewer challenges: an audit rate of 11.7% against an industry average of 33%.
- Clear pricing: one simple monthly payment with no hidden costs.
- Proven loyalty: a 98% client renewal rate.
Because one platform holds your Scope 1, 2 and 3 data, the same evidence supports CSRD, SECR, ESOS, Science Based Targets and IFRS S1 and S2 disclosures.
Whether you are firmly in scope or fielding CSRD requests from customers, book a free consultation and we will tell you plainly what applies to you.
Frequently asked questions
Does CSRD apply to UK companies? Yes, in two cases: UK groups with an EU subsidiary of more than 1,000 employees and €450 million turnover, and UK parent groups with over €450 million EU turnover plus an EU subsidiary or branch above €200 million. Most other UK businesses are affected indirectly through customer data requests.
When do UK companies need to report under CSRD? Large EU subsidiaries report on FY2027 data in 2028. UK parent groups that meet the non-EU thresholds report on FY2028 data in 2029.
Who can provide CSRD compliance support in the UK? Five types of provider: Big 4 and audit firms, management consultancies, specialist sustainability consultancies, software-only platforms, and hybrid providers that combine their own platform with in-house consultants.
Can the same firm prepare and assure our CSRD report? No. Independence rules mean your assurance provider must be separate from the firm that helps you prepare the report.
Is CSRD the same as UK SRS? No. UK SRS is based on the ISSB’s IFRS S1 and S2 standards and focuses on financial materiality. CSRD uses double materiality, covering both your impacts and your financial risks. Much of the underlying emissions data overlaps.