Carbon offset consultants — what they do and how to choose
Offsetting is the most scrutinised corner of corporate climate action. This guide covers what a carbon offsetting consultancyactually delivers, the quality standards that separate credible credits from greenwash risk, and how offsets fit — and don’t fit — UK reporting under SECR and UK SRS.
What carbon offset consultants actually do
Four jobs: sizing the residual, screening quality, procuring, and keeping your claims defensible.
A credible engagement starts from the mitigation hierarchy: measure your footprint (see carbon accounting), reduce what you can, and offset only the residual. The consultant then screens credits against four tests — additionality, permanence, verification and leakage — using standards such as the Woodland Carbon Code for UK projects, and Gold Standard or Verra’s VCS internationally, with the ICVCM Core Carbon Principles as the emerging integrity benchmark. Finally they document the claim itself, because “carbon neutral” statements now face CMA Green Claims scrutiny and the FCA anti-greenwashing rule.
- AdditionalityCredit quality
- The reduction or removal would not have happened without the credit revenue — the single most-failed test in credit screening.
- Mitigation hierarchyStrategy
- Avoid, reduce, substitute, then offset residual emissions last. Offsetting a footprint you have not tried to reduce invites greenwashing findings.
- Removals vs avoidanceCredit types
- Removal credits (woodland, DAC) physically take carbon out of the atmosphere; avoidance credits fund emissions not happening elsewhere. Net-zero standards increasingly require removals for residuals.
Carbon offset consultancy — FAQ
What does a carbon offset consultant do?
A carbon offset consultant helps an organisation buy credible carbon credits: defining what residual emissions genuinely need offsetting after reduction, screening projects and standards (verification, additionality, permanence, leakage), negotiating purchase, and documenting claims so marketing and reporting statements survive scrutiny under the CMA Green Claims Code and the FCA anti-greenwashing rule.
Do UK reporting rules require carbon offsets?
No — and this is the most common misconception.
SECR and UK SRS S2 require disclosure of gross emissions measured under the GHG Protocol; purchased offsets cannot be netted against them.
UK SRS S2 requires disclosure about any carbon credits a company plans to use in reaching targets, and offsetting sits at the bottom of the mitigation hierarchy: reduce first, offset residual emissions last.
Which carbon offset standards matter in the UK?
For UK-based projects, the Woodland Carbon Code and Peatland Code are the government-backed standards.
Internationally, Verra’s VCS and the Gold Standard dominate, with the ICVCM’s Core Carbon Principles emerging as the quality benchmark.
A good consultant will screen any credit against additionality, permanence, verification and vintage regardless of the standard on the label.
How much do carbon offset consultants and credits cost?
Advisory work is typically day-rate (£600–£1,200) or a small fixed scope alongside wider carbon consultancy.
Credit prices vary enormously with quality — from a few pounds per tonne for older renewable-energy credits to £20–£40+ for high-integrity removals and UK woodland units.
Treat very cheap credits as a red flag, and budget for reduction measures first.
Should I hire an offset consultant or a broader carbon consultancy?
If offsetting is part of a wider net-zero strategy — which it should be — a broader carbon or net-zero consultancy that handles measurement, reduction planning and residual offsetting usually gives better value than a standalone offset adviser.
Use a specialist where you have a large one-off purchase, a claims-risk question, or an in-house team that only lacks procurement expertise.
Related guides & references
Carbon consultancy UK
Full-service carbon measurement and reduction firms
Net zero consultancy
Strategy-level providers for reduction pathways and targets
How to choose a provider
Big 4 vs boutique vs software-led vs fractional — with costs
Carbon accounting
Measure the footprint before you offset anything
Scope 3 under UK SRS
Why gross value-chain emissions stay on your report