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Sustainability consultancy UK · choosing the right support

Sustainability consultancy UK

Name the work before choosing a firm. Match its experience to your obligation, test the proposed handover and keep the decisions and working under your control.

UK SRS is an independent reference site. We have assessed no consultancy and publish no consultancy prices or rankings.

Sustainability consultancy · fit

Match the sustainability consultancy to the job, not the brand

Reporting: Framework, period and required disclosures. Technical: Relevant operations, sites and engineering.

Explore the detailed guidance and tools

The right sustainability consultancy depends on three things.

The obligation you are closing.

The size and complexity of your organisation.

What you can do in-house.

Your organisation

In-house capacity

Large audit and advisory

Less likely

Specialist consultancy

Strong fit

Software-led provider

Possible

Independent or fractional

Less likely

A starting point, not a ranking.

Diagram of the sustainability consultancy buying process: seven checks around the choice, from the obligation and the type of provider to credentials, fees, independence, ownership and written answers.

The criteria are set out with their provisions in the sustainability consultancy guide, which also carries an alphabetical directory of firms.

This page is the process.

Fit the provider to the workExplore

Module 01 / 04

Reporting

Framework, period and required disclosures.

Sustainability consultancy · intent

Who hires a sustainability consultant, and why

Trigger: A duty, customer request or operational change? Outcome: What should the work let you decide?

Explore the detailed guidance and tools

Most searches come from one person with one obligation.

Pick the role closest to yours.

They need

SECR

An inventory and the directors’ report disclosure.

Searches like · secr consultant

See the duties →
Begin with the decisionExplore

Module 01 / 04

Trigger

A duty, customer request or operational change?
A shortlist you can substantiateExplore

Module 01 / 04

Relevant work

Request examples suited to the brief.

Sustainability consultancy · obligation

Name the obligation and its status

Scope: Identify the responsible entity. Rule: Apply the relevant test and period.

Explore the detailed guidance and tools

Each duty has its own test, deliverable and date.

Write the one that applies to you in the first line of the brief.

UK SRS is voluntary for any company outside the FCA’s listing categories.

For a listed company, the UK SRS readiness assessment shows the gap before you brief anyone.

  • In force3
  • Comply or explain1
  • Voluntary or your decision2

You would be buying

An inventory and the directors’ report disclosure.

In force.

For quoted companies and large unquoted companies and LLPs.

Each instrument is linked at its owner: SECR, ESOS Phase 4, UK SRS under the FCA’s rules and the climate disclosure duty.

The provision selects the expertiseExplore

Module 01 / 04

Scope

Identify the responsible entity.

Free · 15 minutes · video or phone

Know your obligation? Talk the shortlist through.

Fifteen minutes, free. This site sells no consultancy and has assessed no firm.

Sustainability consultancy · providers

The four kinds of provider, and what each is for

General advisory: Coordinate strategy and reporting work. Technical specialist: Address operational and method questions.

Explore the detailed guidance and tools

Comparing quotes across kinds as if they were the same product is the usual mistake.

Which kind fits follows from the obligation and your capacity, not the provider’s size.

Published rankings measure firms on their authors’ criteria.

Evidence about a firm, not a shortlist.

Sustainability
consultancy

Large audit and advisory

For
Multi-country programmes, and disclosure that must reconcile to audited accounts.
Check
Independence first, if your auditor’s firm is a candidate.

Specialists often cover one subject, and independents are engaged for strategy sprints.

The carbon reporting software guide compares the software-led providers.

Subject guides cover the narrower markets: carbon consultants, net zero consultants and ESG consultants.

Different provider rolesExplore

Module 01 / 04

General advisory

Coordinate strategy and reporting work.

Sustainability consultancy · credentials

The credentials the law names, and the ones it does not

Individual: Membership, training and relevant experience. Register: Check a required assessor registration.

Explore the detailed guidance and tools

For most sustainability work, UK law names no credential at all.

No consultancy is accredited by UKAS as a consultancy.

“UKAS-accredited consultants” is not a meaningful claim.

ESOS: check the person, not the firm.

Check the register, not membership.

The check is walked through on ESOS consultants and assessors.

ISEP was formerly called IEMA.

Check the meaning, not the badgeExplore

Module 01 / 04

Individual

Membership, training and relevant experience.

Sustainability consultancy · fees

Comparing fees without a price list

Stages: Separate assessment, build and recurring work. Effort: Ask for days and grades by stage.

Explore the detailed guidance and tools

Few sustainability consultancy firms publish fees.

This site does not estimate them.

What you can compare is structure, and days by grade.

Fee model · as on Management Consultancy Framework Four

Fixed price

Suits a defined deliverable.

Price certaintyHigh

Two proposals, 30 days each · illustrative

Proposal A

6 senior · 12 manager · 12 consultant days

6
12
12

Proposal B

3 senior · 9 manager · 18 consultant days

3
9
18
  • Partner or director
  • Manager
  • Consultant

Ask for year two in the same proposal.

The difference is negotiable only before you sign.

Assurance is a separate fee from a separate provider.

Do not compare a quote that includes it with one that does not.

What consultants themselves earn is on UK sustainability consultant salaries.

Agree an equivalent scopeExplore

Module 01 / 04

Stages

Separate assessment, build and recurring work.

Sustainability consultancy · independence

Settle independence before you appoint

Preparation: Draft and calculate the information. Management: Own decisions and approve the output.

Explore the detailed guidance and tools

The provider you choose for advisory work can rule out who certifies or assures it.

The FCA’s rules do not require assurance of UK SRS disclosures.

If obtained, PS26/19 ¶2.45 asks you to name the provider.

  1. 01

    Choose the assurer or certifier

    Decide early whether you want assurance, and who provides it.

  2. 02

    Brief the adviser around it

    The advisory work is scoped to keep them independent.

  3. 03

    Assurance proceeds

    No self-review. They can act.

ISO/IEC 17021-1 · months since the body consulted

Inside the two-year bar. It cannot certify that system.

Advice and evaluation differExplore

Module 01 / 04

Preparation

Draft and calculate the information.

Sustainability consultancy · ownership

Own the method, the files and the handover

Records: Maintain original inputs and evidence. Files: Retain editable calculations and reports.

Explore the detailed guidance and tools

The most expensive outcome is a first year nobody inside can repeat.

Ask the question that separates proposals.

Tick what the contract already says.

Keep the working usableExplore

Module 01 / 04

Records

Maintain original inputs and evidence.

Sustainability consultancy · cases

Banks, manufacturers, audits and resilience planning

Boundary: Was the work for a comparable organisation? Output: Was the required deliverable similar?

Explore the detailed guidance and tools

Some buyers have a narrower question.

Pick yours.

Financed emissions are measured with the PCAF standard.

Financed emissions dominate

Usually measured with the PCAF standard.

A listed bank’s UK SRS reporting is comply or explain from 2027.

Ask for

  • The PCAF method by asset class
  • Whether the firm would also be your assurer
Examples should match your briefExplore

Module 01 / 04

Boundary

Was the work for a comparable organisation?

Free · 15 minutes · video or phone

Ready to brief the shortlist?

Fifteen minutes, free.

Bring the obligation and the date the work must support.

Sustainability consultancy · brief

Build the brief and the questions

Purpose: Name the duty or decision. Coverage: Set entities, activities and period.

Explore the detailed guidance and tools

A written brief gets comparable answers.

A meeting gets a capability presentation.

Send the same text to every provider, and ask for written answers.

A starting draft, not advice.

Names no provider.

Nothing is stored or sent.

Your draft, ready to copy

Brief

Why we are buying: SECR (directors’ report, every year).

Date the work must support: [add the date].

Deliverable: An inventory for one stated year, with a written boundary, methodology and calculation file that we keep.

We will own every calculation file, methodology note and draft at the end of the engagement.

Please price year two in the same proposal, and give the days by grade.

Questions · please answer in writing

1. Which standard and edition will you work to, and how will the file be restated when the GHG Protocol and ISO publish their combined corporate standard?
2. Which year’s UK government conversion factors will you use for our activity data?
3. Which of the fifteen Scope 3 categories will you assess, and which do you expect to treat as not relevant, and why?
4. Will any independent body verify the inventory? If so, which, under whose accreditation, and how is it separated from your team?
5. In what form will we receive the calculation file and methodology, so another provider could repeat it next year?
6. How many days, at which grades, does your proposal assume?
A brief with a clear handoverExplore

Module 01 / 04

Purpose

Name the duty or decision.

Sustainability consultancy · compare

Put the answers side by side

Scope: Check the same outputs are included. People: Compare roles, experience and availability.

Explore the detailed guidance and tools

Record which of the eight checkable points each proposal covered in writing.

It is your record, not a score.

It does not weigh price, sector experience or the people you met.

Says which of our obligations are in force, comply or explain, or voluntary, with the provision

Names the standard and edition the work will follow

Names any signatory the law requires (ESOS lead assessor and register; UKAS-accredited verifier)

Explains independence if we later want assurance or certification

Confirms we own the files, method and drafts at the end

Gives consultant days by grade, not just a total

Prices year two in the same proposal

Shows a redacted example of the same work, and names who will do ours

Still to ask · Proposal A

→ Which obligations are in force

→ The standard and edition

→ Any signatory the law requires

→ Independence for assurance

→ Ownership of files and method

→ Days by grade

→ The year-two price

→ A redacted example and named people

To talk the shortlist through, you can book a free 15-minute call.

This site sells no consultancy and has assessed no firm.

Start again from the uksrs.org.uk home page for the wider reference.

Compare equivalent proposalsExplore

Module 01 / 04

Scope

Check the same outputs are included.

Illustrative brief · no consultancy assessed

A worked brief: two firms quote for the same project

Send both the same boundary, outputs and acceptance tests. Compare the people doing the work, dependencies, handover and year-two support alongside the quoted effort.

For the detailed requirements, see sustainability strategy consultancy.

  1. 1

    Brief

    The same deliverables and client inputs.

  2. 2

    Proposal

    Roles, method, exclusions and review controls.

  3. 3

    Handover

    Editable files, rights and update training.

Each date has a different meaning

The relevant dates, in order

Check who the date applies to and whether it is publication, application, submission or a planned milestone.

  1. 25 February 202601

    UK SRS published

    Available for voluntary use; publication alone does not create a universal company duty.

    Read the primary source

  2. 30 September 202602

    FCA final rules published

    PS26/19 replaces the consultation proposal.

    Read the primary source

  3. Periods from 1 January 202703

    Listed-company application

    UKLR 6, 14, 15, 16 and 22 report against the standards or explain.

    Read the primary source

  4. 2028 / for calendar-year companies04

    First reports under the new rule

    Other year ends have their own annual-report timetable.

    Read the primary source

A suggested delivery sequence

From the brief to the handover

This is an editorial buying and preparation sequence, not a statutory timetable or a promise about how long the engagement takes.

  1. 01 / Brief01

    Brief

    Name the duty or decision and the required output.
  2. 02 / Evidence02

    Evidence

    Collect records, methods and assumptions.
  3. 03 / Preparation03

    Preparation

    Draft the calculations, disclosures or action plan.
  4. 04 / Review04

    Review

    Resolve gaps and assign the relevant approvals.
  5. 05 / Handover05

    Handover

    Keep editable working, ownership and update guidance.

13 / Frequently asked

Choosing a sustainability consultancy, answered

What should I look for when choosing a sustainability consulting firm?

Seven things, in order: that it can say which of your obligations is in force, comply or explain or voluntary; the date the work must support; a named signatory where the law needs one; independence if you will seek assurance; the method and who owns the files; days by grade with year two priced; and real examples of the same work.

How do fees compare across sustainability consultancies?

Few firms publish fees, and this site does not estimate them.

Fees are usually time and materials, fixed price, or risk and reward.

Compare proposals on the number of days at each grade for the same named scope, and on the year-two price, rather than on headline totals.

What qualifications should a UK sustainability consultant have?

For most work the law requires none.

For ESOS, the lead assessor must be on one of the seven approved registers.

For UK ETS verification, the verifier must be accredited by UKAS.

Individual grades such as ISEP membership or Chartered Environmentalist describe a person’s competence, not a firm’s accreditation.

Big audit firm, boutique, software or an independent?

Choose by the work.

Multi-regime, multi-country disclosure that must reconcile to audited accounts suits a large practice; a single defined obligation can suit a specialist or independent; repeatable measurement often suits software with light advice.

If you will seek assurance from your auditor, check independence before hiring its advisory arm.

Can we outsource our sustainability audits?

You can buy them, but who may do them depends on the audit.

An ESOS assessment needs a registered lead assessor and director sign-off; an ISO 14001 certificate comes from an accredited certification body that may not also have consulted on the system; a UK ETS emissions report needs a UKAS-accredited verifier.

How do we choose a decarbonisation consultant for a manufacturing business?

Start with the energy and carbon duties a manufacturer meets: ESOS if large, SECR if large or quoted, the UK ETS if it runs a regulated installation, and possibly a Climate Change Agreement.

Then look for energy engineering alongside carbon accounting, and ask for an example on a comparable process.

How do we choose a consultant for bank or investor sustainability reporting?

Financed emissions dominate, usually measured with the PCAF standard, and a listed bank’s UK SRS reporting is comply or explain from 2027.

Ask for the PCAF method by asset class, and check whether the firm would also be your assurer.

Should we hire a consultant or build in-house?

Buy consultancy for work that ends (a baseline, a gap analysis, a first report) and keep in-house the work that repeats.

Many companies use a consultant for the first year and software or staff thereafter.

Does UK SRS mean we need a consultant now?

Only if you are a listed company in UKLR 6, 14, 15, 16 or 22, which report against UK SRS on a comply-or-explain basis from periods beginning on or after 1 January 2027.

For everyone else UK SRS is voluntary, and a readiness review is optional.

What do sustainability consulting services usually cover?

Most engagements are one of: a carbon footprint, an ESOS energy assessment, disclosure support for SECR, UK SRS or CSRD, net zero targets and a plan, or a carbon claim review.

Assurance comes from a separate, independent provider. Each service is itemised on ESG consulting services.

Are “UKAS-accredited” sustainability consultants better?

The phrase is not a meaningful claim: no consultancy is accredited by UKAS as a consultancy.

UKAS accredits verifiers and certification bodies, which then cannot consult on what they verify or certify.

Does a sustainability consultant need to be based near us?

No UK obligation turns on where a consultant is based.

What matters is the obligation, any register or accreditation the law names, and named people with examples of the same work.

Is a sustainability consultant the same as an ESG consultant?

Largely the same market under two labels.

Choose on the obligation and the deliverable, not the label.

The ESG consultancy guide covers the ESG-specific cases, such as ratings and FCA SDR.

Free · video or phone

A short call on your shortlist.

Fifteen minutes, video or phone. Which kind of sustainability consultant fits, before you brief anyone.

  1. 0115 minutes, video or phone
  2. 02Which obligation applies
  3. 03Which kind of provider fits
  4. 04A plain next step

Pick a time on the calendar

Book a free 15-minute call →

Opens the booking calendar to choose a live slot.

Sources

Primary sources

Every figure traces to the instrument’s owner.

Last verified 10 October 2026.

Checked against 16 sources fromFinancial Conduct AuthorityDepartment for Business and Tradelegislation.gov.ukDefra / BEISEnvironment AgencyGOV.UK (Environment Agency)
  1. Financial Conduct Authority
    PS26/19

    Comply or explain across UK SRS from 2027.

  2. Financial Conduct Authority
    PS26/19 (PDF), ¶2.45

    Assurance not required; provider named if obtained.

  3. Department for Business and Trade
    UK Sustainability Reporting Standards, guidance

    Available for voluntary use by any entity.

  4. legislation.gov.uk
    SI 2008/410 Schedule 7 paragraph 20B

    SECR’s exemption test.

  5. Defra / BEIS
    Environmental Reporting Guidelines including SECR guidance

    No legislative requirement to assure SECR figures.

  6. legislation.gov.uk
    Companies Act 2006, section 414CA

    The climate disclosure duty’s scope.

  7. Environment Agency
    How to comply with ESOS Phase 4

    The undertaking’s duty to appoint and check a lead assessor.

  8. GOV.UK (Environment Agency)
    Energy Savings Opportunity Scheme (ESOS)

    The approved lead assessor registers.

  9. legislation.gov.uk
    ESOS Regulations 2014, regulation 12

    What an approved register is.

  10. GOV.UK
    UK ETS for installations: how to comply

    The verifier must be accredited by UKAS.

  11. ISO
    ISO/IEC 17021-1:2015

    A certification body may not consult on the system it certifies.

  12. IESBA
    IESSA Technical Overview

    Management responsibility and self-review in sustainability assurance.

  13. ISEP
    Evolution: from IEMA to ISEP

    The name change and post-nominals.

  14. Society for the Environment
    Chartered Environmentalist

    What CEnv tests.

  15. Government Commercial Agency
    Management Consultancy Framework Four (RM6309)

    Pricing models: time and materials, fixed, or risk and reward.

  16. PCAF
    The Global GHG Accounting and Reporting Standard

    Financed emissions for banks and investors.

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