UK SRS implementation cost: what drives it
There is no official UK SRS cost benchmark, and no credible single figure exists.
So rather than invent one, this analysis sets out what actually drives the cost — the data systems behind Scope 1, 2 and 3, scenario-analysis capability, governance, assurance and advisory — and how to budget against the real requirements.
Every date and scope figure here is sourced to a primary regulator; no pound figure is, because none has been published.
There is no official cost benchmark
The first thing to say about UK SRS cost is the most important: no authority has published a per-company figure.
The standards were published by the Department for Business and Trade on 25 February 2026 and are available for voluntary use[2].
The FCA’s consultation, CP26/5, proposes making UK SRS S2 mandatory from 1 January 2027 for around 500 primary-listed companies in UK Listing Rules categories 6, 16 and 22[1].
Neither document sets a cost benchmark for an individual reporter.
So any specific first-year total, day rate or three-year projection you see quoted is an advisory estimate, not a sourced fact — and credible figures vary enormously by company.
What actually drives the cost
Cost is not a single line item.
It is the sum of several capabilities a company has to build or buy, each of which scales with size, complexity and how mature the existing reporting already is.
The table below sets out the main drivers, what makes each one bigger or smaller, and how it tends to fall over time.
| Driver | What it covers | What makes it bigger | One-off or recurring |
|---|---|---|---|
| Scope 1 & 2 emissions data | Capturing and calculating direct and energy emissions | Many sites, fuel types and entities; weak existing data | Setup is one-off; measurement recurs |
| Scope 3 emissions data | Value-chain emissions across the relevant GHG Protocol categories | Long, complex supply chains; primary-data ambitions | Mostly recurring; build is one-off |
| Climate scenario analysis | Resilience testing against climate scenarios under UK SRS S2 | Less in-house expertise; complex physical/transition risk | Methodology one-off; refresh recurs |
| Governance & controls | Board oversight, risk processes and reporting controls | Limited existing climate governance; control gaps | Mostly one-off; maintenance recurs |
| External assurance | Independent assurance over disclosures (voluntary) | Reasonable rather than limited assurance; wide scope | Recurring annual cost if chosen |
| Advisory & software | Consultants and reporting platforms to fill capability gaps | Outsourcing more of the build; bespoke needs | Mix of one-off and recurring |
Emissions data: Scope 1, 2 and especially 3
For most companies the single largest driver is the data infrastructure behind greenhouse gas emissions.
Scope 1 and Scope 2 — direct emissions and purchased energy — are the more tractable part, particularly for companies that already report under SECR, which uses the GHG Protocol as its methodological foundation[4].
Scope 3 is where the cost genuinely varies. It reaches across the value chain, and the GHG Protocol’s fifteen Scope 3 categories mean the effort depends on how many suppliers, products and activities sit behind the number[4].
CP26/5 phases this in: in-scope listed companies get a one-year transitional relief on Scope 3 from their initial application date of 1 January 2027[1].
That relief spreads the build but does not remove it — the capability still has to exist before the year is up. For the mechanics of the data itself, see our UK SRS requirements analysis.
Scenario analysis and governance
UK SRS S2 carries forward the four-pillar TCFD architecture — governance, strategy, risk management, and metrics and targets[2].
Two of those pillars tend to surprise first-time reporters on cost.
Scenario analysis. Testing the resilience of the business against climate scenarios is a specialist exercise, and companies without in-house expertise often buy it in the first year before building the methodology internally.
Governance and controls. Board oversight, risk processes and the internal controls that make a disclosure assurable are mostly a one-off build, but they have to be in place early because everything else reports through them.
Companies that have run TCFD-aligned reporting since the Listing Rules required it carry less of this cost than those starting fresh.
Assurance is a choice, not a mandate
A common assumption is that external assurance is a forced cost.
Under the FCA’s proposals it is not.
CP26/5 does not mandate assurance for in-scope listed companies[1].
The FRC has, however, published the voluntary UK sustainability assurance standard, ISSA (UK) 5000, which becomes effective on 15 December 2026[3].
Many companies will still seek at least limited assurance over emissions data because investors increasingly expect it.
The point for budgeting is that assurance is a separate, recurring line — and reasonable assurance costs more than limited assurance.
How to budget sensibly without a benchmark
Without an authoritative figure to anchor to, the sensible approach is a bottom-up estimate built against the actual requirements.
Start from your own position: what you already capture under SECR or TCFD is cost you have largely paid; the gap to UK SRS is what you are really budgeting.
Split the estimate into one-off build cost and recurring run cost, because they behave very differently year to year.
Decide in-house versus outsourced for each driver — data, scenario analysis, governance, assurance — rather than as a single make-or-buy decision.
Use the transitional reliefs to phase the spend, but plan the capability to exist before each relief expires: Scope 3 after one year, and UK SRS S1 non-climate disclosures after up to two years, from the 1 January 2027 initial application date[1].
For a structured route through the build itself, see our UK SRS implementation guide and the carbon reporting software options that can absorb some of the data work.
UK SRS cost: frequently asked questions
How much does UK SRS implementation cost?
There is no official UK SRS cost benchmark, and no credible single figure exists. The Department for Business and Trade and the FCA have not published a per-company cost estimate, and any specific pound figure you see quoted is an advisory estimate rather than a sourced fact. Cost varies enormously by company size, existing data maturity, the depth of the value chain behind Scope 3, and how much work is done in-house versus by advisers. The honest answer is that a company should build its own bottom-up estimate against the actual requirements rather than rely on a headline number.
What is the single biggest cost driver?
For most companies it is data — specifically the systems and processes needed to capture, calculate and assure greenhouse gas emissions across Scope 1, Scope 2 and, in time, Scope 3. Scope 3 in particular reaches into the value chain, so the cost depends on how many suppliers, products and categories sit behind the number. Companies that already report under SECR or TCFD have a head start; those starting from a blank sheet carry more setup cost.
Does the one-year Scope 3 relief reduce cost?
It changes the timing of cost rather than removing it. Under the FCA’s CP26/5 proposals, in-scope listed companies get a one-year transitional relief on Scope 3 emissions and up to two years on UK SRS S1 non-climate disclosures from their initial application date of 1 January 2027. That phasing lets companies spread the build, but the underlying capability still has to be created before the relief expires.
When is assurance a cost?
The FCA’s CP26/5 does not mandate assurance, so external assurance is not a forced cost for in-scope listed companies under the proposals. However, the FRC has published the voluntary UK assurance standard ISSA (UK) 5000, and investors increasingly expect at least limited assurance over emissions data. Companies that choose assurance should treat it as a separate, recurring line in the budget rather than a one-off.
Why does this page not give pound figures?
Because no primary source publishes them. This site’s rule is that no number appears without a citation to a primary source such as the FCA, DBT, FRC or legislation. The cost figures that circulate online — first-year totals, day rates, three-year projections — are advisory estimates that cannot be traced to an authoritative source, so we describe the drivers instead and leave the quantification to each company’s own bottom-up build.
- CP26/5: Aligning listed issuers’ sustainability disclosures with international standards — Financial Conduct Authority · Scope (UKLR 6, 16, 22), 1 Jan 2027 timing, Scope 3 and S1 transitional reliefs; no per-company cost benchmark
- UK Sustainability Reporting Standards (UK SRS S1 and UK SRS S2) — GOV.UK / Department for Business and Trade · Standards published 25 February 2026; available for voluntary use
- FRC issues ISSA (UK) 5000 sustainability assurance standard — Financial Reporting Council · Voluntary UK assurance standard; published 12 November 2025, effective 15 December 2026
- Corporate Value Chain (Scope 3) Standard — GHG Protocol · Fifteen Scope 3 categories underpinning value-chain emissions accounting