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.
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.
Module 01 / 04
Reporting
Module 02 / 04
Technical
Module 03 / 04
Strategy
Module 04 / 04
Assurance
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 →Module 01 / 04
Trigger
Module 02 / 04
Outcome
Module 03 / 04
Evidence
Module 04 / 04
Owner
Sustainability consultancy · checks
Seven checks, in order
Relevant work: Request examples suited to the brief. People: Check who will deliver the engagement.
Explore the detailed guidance and tools
The first four can be settled before you speak to anyone.
They remove more providers than any ranking.
Check 01 · before you call
Settle before you speak to anyone
The obligation and its status
Name the duty and whether it is in force, comply or explain, or voluntary.
Check 02 · before you call
Settle before you speak to anyone
The date the work must support
A filing date, a qualification date or a contract date.
Check 03 · before you call
Settle before you speak to anyone
Any signatory the law requires
An ESOS lead assessor, a UKAS-accredited verifier, or none.
Check 04 · before you call
Settle before you speak to anyone
Independence, if you want assurance
Choose the assurer or certifier before the adviser.
Check 05 · in writing
Ask in the proposal
Method and ownership of the files
You own every calculation file, method note and draft.
Module 01 / 04
Relevant work
Module 02 / 04
People
Module 03 / 04
Method
Module 04 / 04
Handover
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.
6
duties
- In force3
- Comply or explain1
- Voluntary or your decision2
Each instrument is linked at its owner: SECR, ESOS Phase 4, UK SRS under the FCA’s rules and the climate disclosure duty.
The detail is on SECR requirements, ESOS Phase 4, UK SRS S1 and UK SRS S2.
Module 01 / 04
Scope
Module 02 / 04
Rule
Module 03 / 04
Output
Module 04 / 04
Appointment
Free · 15 minutes · video or phone
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.
Module 01 / 04
General advisory
Module 02 / 04
Technical specialist
Module 03 / 04
Assessor
Module 04 / 04
Assurer
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.
2
in law
- Named in law2
- Describe a person3
- None needed, or not meaningful2
Named in law
ESOS lead assessor
On one of seven approved registers.
Checking the assessor is your responsibility.
Named in law
UK ETS verifier
Accredited by UKAS to ISO 14065, with a scope covering the activity.
Describes a person
ISEP grades
Formerly IEMA.
New post-nominals since 17 July 2025.
Describes a person
Chartered Environmentalist
Awarded by the Society for the Environment.
Describes a person
Chartered accountancy
For reporting and assurance, the bodies set their own standards for members.
None needed
SECR
Needs no credential.
The government’s guidelines say its figures need not be assured.
Not a meaningful claim
“UKAS-accredited consultants”
No consultancy is accredited by UKAS as a consultancy.
The check is walked through on ESOS consultants and assessors.
ISEP was formerly called IEMA.
Module 01 / 04
Individual
Module 02 / 04
Register
Module 03 / 04
Certificate
Module 04 / 04
Accreditation
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
Proposal B
3 senior · 9 manager · 18 consultant days
- 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.
Module 01 / 04
Stages
Module 02 / 04
Effort
Module 03 / 04
Inputs
Module 04 / 04
Terms
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.
- 01
Choose the assurer or certifier
Decide early whether you want assurance, and who provides it.
- 02
Brief the adviser around it
The advisory work is scoped to keep them independent.
- 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.
Module 01 / 04
Preparation
Module 02 / 04
Management
Module 03 / 04
Evaluation
Module 04 / 04
Limit
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.
0
of 4
Tick what the contract already says.
Module 01 / 04
Records
Module 02 / 04
Files
Module 03 / 04
Rights
Module 04 / 04
Training
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
Module 01 / 04
Boundary
Module 02 / 04
Output
Module 03 / 04
Evidence
Module 04 / 04
Permission
Free · 15 minutes · video or phone
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
Module 01 / 04
Purpose
Module 02 / 04
Coverage
Module 03 / 04
Deliverables
Module 04 / 04
Exit
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.
Module 01 / 04
Scope
Module 02 / 04
People
Module 03 / 04
Method
Module 04 / 04
Commercial
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
Brief
The same deliverables and client inputs.
- 2
Proposal
Roles, method, exclusions and review controls.
- 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.
- 25 February 202601
UK SRS published
Available for voluntary use; publication alone does not create a universal company duty. - 30 September 202602
- Periods from 1 January 202703
Listed-company application
UKLR 6, 14, 15, 16 and 22 report against the standards or explain. - 2028 / for calendar-year companies04
First reports under the new rule
Other year ends have their own annual-report timetable.
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.
- 01 / Brief01
Brief
Name the duty or decision and the required output. - 02 / Evidence02
Evidence
Collect records, methods and assumptions. - 03 / Preparation03
Preparation
Draft the calculations, disclosures or action plan. - 04 / Review04
Review
Resolve gaps and assign the relevant approvals. - 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.
- 0115 minutes, video or phone
- 02Which obligation applies
- 03Which kind of provider fits
- 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.
Continue reading
Read next
Sustainability consulting firms
The criteria to the provision, and an A to Z directory.
ESOS consultants and assessors
How to check a lead assessor.
Carbon footprint consultants
What the inventory is and how to check claims.
ESG consultancy
Start from the obligation, then credentials, assurance and a brief.
ESG consulting services
Each service itemised, from materiality to assurance.
Net zero consultancy
Baseline, targets, pathway, plan and delivery.
Sources
Primary sources
Every figure traces to the instrument’s owner.
Last verified 10 October 2026.
- Financial Conduct AuthorityPS26/19
Comply or explain across UK SRS from 2027.
- Financial Conduct AuthorityPS26/19 (PDF), ¶2.45
Assurance not required; provider named if obtained.
- Department for Business and TradeUK Sustainability Reporting Standards, guidance
Available for voluntary use by any entity.
- legislation.gov.ukSI 2008/410 Schedule 7 paragraph 20B
SECR’s exemption test.
- Defra / BEISEnvironmental Reporting Guidelines including SECR guidance
No legislative requirement to assure SECR figures.
- legislation.gov.ukCompanies Act 2006, section 414CA
The climate disclosure duty’s scope.
- Environment AgencyHow to comply with ESOS Phase 4
The undertaking’s duty to appoint and check a lead assessor.
- GOV.UK (Environment Agency)Energy Savings Opportunity Scheme (ESOS)
The approved lead assessor registers.
- legislation.gov.ukESOS Regulations 2014, regulation 12
What an approved register is.
- GOV.UKUK ETS for installations: how to comply
The verifier must be accredited by UKAS.
- ISOISO/IEC 17021-1:2015
A certification body may not consult on the system it certifies.
- IESBAIESSA Technical Overview
Management responsibility and self-review in sustainability assurance.
- ISEPEvolution: from IEMA to ISEP
The name change and post-nominals.
- Society for the EnvironmentChartered Environmentalist
What CEnv tests.
- Government Commercial AgencyManagement Consultancy Framework Four (RM6309)
Pricing models: time and materials, fixed, or risk and reward.
- PCAFThe Global GHG Accounting and Reporting Standard
Financed emissions for banks and investors.