Interim chief sustainability officer salary · day rates, 2026
What an interim chief sustainability officer earns, by the day and by the assignment
An interim chief sustainability officer is paid a day rate, not a salary.
On Exec Capital’s 2026 figures, the interim chief sustainability officer salary runs from £1,200 to £1,800 a day at a mid-market business, £1,500 to £2,200 at a FTSE 250 or large private company, and £2,000 to £3,000 at a FTSE 100 company or a regulated financial services firm.
The rate covers full-time work for a fixed period, with no salary, pension or paid holiday behind it.
When you brief us on an interim, we send a shortlist of 3–5, each with day rate, availability and IR35 position set out.
How a brief runswhat we undertake
- 01Brief30-MINUTE SCOPING CALLDay 0
- 02Shortlist of 3–5VETTED · RATE BENCHMARK · IR35After the brief
- 03InterviewsYOU MEET THE SHORTLISTYour diary
- 04Scoped startFIRST-MONTH OUTCOMES AGREEDYou set the date
- 05Fractional, interim and permanentIR35 POSITION SET OUTOn every brief
Shortlist3–5
15 minutes · video or phone
Book 15 minutes to hire an interim chief sustainability officer
Tell us the scope and the days a week. We come back with Interim Chief Sustainability Officer candidates, their day rates and availability.
- 0115 minutes, video or phone
- 02We scope the role and the days a week
- 03A shortlist of 3–5 after the call
- 04Fractional, interim and permanent briefs
Pick a day that suits · live availability
On the board · last 3 months
Interim sustainability leadership jobs on the board
No Interim sustainability leadership roles on the board in the last three months. Showing interim executive roles instead.
- InterimSyndicatedInterim Chief Executive Officer (Women's Health Charity)
Verity (PMOS UK) · United Kingdom
Rate not stated3 d/wk - InterimSyndicatedInterim Finance Director
Pragmatic Semiconductor · Cambridge
est £1,400/day5 d/wk - InterimSyndicatedInterim Finance Director
Juro · United Kingdom
£800–£1,000/dayUnited Kingdom - InterimExclusiveInterim Chief Operating Officer
Confidential client (Fractional Quest mandate) · London
Rate not stated5 d/wk
Interim sustainability roles on the board
Fractional recruiting starts with the brief, not the CV pile. Send a Interim Chief Sustainability Officer brief and we come back with a shortlist of three to five candidates, each through five-stage vetting.
01/ the role
How an interim is paid, and why the unit is the day
An interim chief sustainability officer holds the sustainability seat full-time for a defined period: a departure, a disclosure cycle, a target submission or the build of a new function.
Exec Capital says that where the work has a clear endpoint, such as a TCFD disclosure cycle or a science-based target submission, a six-to-twelve month interim engagement may fit better than a permanent role.
That makes the day rate the real unit of pay.
There is no salary, no employer pension and no paid holiday, and the interim carries the gaps between assignments.
Across all functions, the Institute of Interim Management’s 2026 survey puts the average assignment at 10 months, the average gap between assignments at 3.2 months and the average days billed in a year at 148.
An interim who works through their own company pays themselves through salary and dividends from what the company earns, after its costs and Corporation Tax.
The day rate is the company’s income, not the interim’s take-home pay.
02/ scope
How to hire an interim chief sustainability officer
1. Define the mandate and its end
Say what the interim must deliver and by when.
For a quoted company that may be the energy and carbon disclosure in the next annual report, under the government’s environmental reporting guidelines.
For others it may be readiness for the UK Sustainability Reporting Standards, which are published and voluntary for now.
The UK standards are based on the global baseline set by the International Sustainability Standards Board.
Science-based targets follow the standards of the Science Based Targets initiative.
2. Decide IR35 status at the start
If your business is medium or large, you make the status determination for the engagement and give the interim your reasons.
Settle it before you go to market, because it changes the rate candidates quote.
3. Match the record to the mandate
Ask for outcomes from comparable assignments: the disclosure that was published, the target that was validated, the team that was in place on exit.
Roles on the board are on interim chief sustainability officer jobs.
What we do on an interim brief
We recruit interim, fractional, part-time, temporary and permanent sustainability leaders, and non-executive directors.
We send a shortlist of 3–5, each with day rate, availability and IR35 position set out, and every candidate goes through our five-stage vetting first.
03/ the board
What the board holds.
A read of the roles on the board on this page, counted as they stand: how each is engaged, whether the posting gives the days and the rate, and where the work happens.
On this board, last 90 days · 4 roles · interim executive
Engagement
- Interim4
Seat
- Finance director2
- CEO1
- COO1
Days a week
- Stated in the posting3
- Not stated1
Day rate
- Verified rate1
- Estimated (est)1
- Rate not stated2
Work arrangement (as the job feed classifies it)
- Remote1
- Hybrid1
- On-site1
- Not classified1
Newest posting on the board: 18 Sept 2026.
Postings per week on this board, last 90 days
4 postings on this board in the last 90 days, counted by the week each was published.
04/ the route
Fractional, interim or permanent?
Four taps. The answer names the route for the seat and the page that covers it.
The route · Fractional
A fractional chief sustainability officer.The work fills part of the week, so buy the days it needs.
A fractional chief sustainability officer holds the seat on agreed days for as long as the seat is needed, and works for other clients on the rest.
The route · Interim
An interim chief sustainability officer.The work fills the week, and it has an end: a programme, a cover, a transaction.
An interim chief sustainability officer takes the seat full time for that stretch and hands it over when it is done.
The route · Interim, then permanent
Interim now, a permanent chief sustainability officer after.The seat is full time and long term, and the need is now.
An interim chief sustainability officer holds it while the permanent search runs, so the seat is not left empty.
The route · Permanent
A permanent chief sustainability officer.A full-time seat that sits at the table for years is a permanent hire.
There is time to run a search, so run one.
05/ rates by stage
Interim chief sustainability officer salary day rates by firm and source
Day rates as each publisher states them, all 2026. Exec Capital, a recruiter, publishes interim bands by firm tier on its interim chief sustainability officer page, and the same bands on its fractional page. The IIM figures cover every interim function, not sustainability alone.
06/ economics
Interim pay and IR35: who decides, and what it changes
Tax status turns on how the engagement runs, not on the title or the contract alone.
Under the off-payroll working rules (IR35), a medium or large client makes the status determination; for a small client outside the public sector, the interim’s own company decides.
The rules apply contract by contract, so one interim can have engagements on both sides.
It shows in the rates.
The IIM’s 2026 survey puts the average interim day rate at £949 outside IR35 and £830 inside, across all functions.
HMRC’s CEST tool gives its view on a specific engagement.
Our IR35 guide sets out the tests.
07/ vetting
How we vet interim chief sustainability officers
What we undertake on every brief, before a candidate reaches you.
- 01
Qualification screen
Verify Interim Chief Sustainability Officer tenure, sector context and stage fit.
SOURCING - 02
Mandate fit
Match to your situation — stage, board dynamics, timing.
MATCHING - 03
Reference deep-dive
We take references ourselves, from recent past clients — real outcomes, not titles.
VERIFY - 04
Shortlist
Three to five candidates with day rate, availability and IR35 position set out.
SHORTLIST OF 3–5
08/ interim chief sustainability officer day rate
Interim chief sustainability officer day rate by firm
The interim chief sustainability officer day rate rises with the size and regulation of the firm.
Exec Capital puts a mid-market interim, at a business turning over £50m to £250m, at £1,200–£1,800 a day.
A FTSE 250 or large private company, turning over £250m to £1bn, pays £1,500–£2,200, and a FTSE 100 company or regulated financial services firm £2,000–£3,000.
Exec Capital publishes the same three bands for fractional engagements, where the executive works a few days a month.
The difference between the two is the days bought, not the rate.
For scale, the IIM’s 2026 survey puts the average day rate across every interim function at £907, and £1,004 in the private sector.
An interim sustainability chief at a mid-market firm sits above both, on Exec Capital’s figures.
09/ annualised
What the day rate comes to over a year
No interim is paid a salary, but the comparison is useful.
At Exec Capital’s mid-market band of £1,200–£1,800 a day, 220 days would bill £264,000–£396,000.
At the IIM’s all-function average of 148 days billed in a year, the same band bills £177,600–£266,400.
Both are our arithmetic, a comparison and not a salary.
A full month of interim cover, at about 22 working days, comes to £26,400–£39,600 at the mid-market band (our arithmetic).
That is the client’s cost.
The interim pays their own pension, holidays, insurance and the gaps between assignments out of it.
For scale, Exec Capital puts the permanent base salary for a board-level chief sustainability officer at £150,000–£400,000 or more, before bonus, pension and employer’s National Insurance.
See chief sustainability officer salary for the permanent benchmarks in full.
10/ the other routes
Interim, permanent or fractional: which pay basis fits
Interim cover buys a full-time sustainability chief for a fixed period.
A permanent hire is paid a salary and package; see chief sustainability officer salary.
If the work fits into a few days a month, a fractional engagement on the same day rate costs less over the same months; see fractional chief sustainability officer salary.
11/ questions
Interim chief sustainability officer salary FAQ
The questions people ask before bringing in an interim chief sustainability officer.
Book 15 minutes · shortlist of 3–5
Bring the brief. We architect the team.
A shortlist of 3–5 with day rate, availability and IR35 position set out, after five-stage vetting.
