Carbon offsetting for UK businesses: a practical guide
Carbon offsetting gets a bad press — sometimes justifiably. But used correctly, it is a legitimate part of a business net zero strategy. This guide explains what to do, what to avoid, and what it will actually cost a UK business in 2026.
Carbon offsetting gets a bad press — sometimes justifiably. But used correctly, it is a legitimate part of a business net zero strategy. This guide explains what to do, what to avoid, and what it will actually cost a UK business in 2026.
What offsetting actually means
Carbon offsetting means paying for emissions reductions or removals elsewhere to compensate for emissions you produce yourself. When a business buys a carbon credit and retires it against its own emissions, it can claim that tonne has been offset.
The key word is "compensate." Offsetting does not eliminate your emissions — it finances reductions elsewhere. This is why the scientific consensus is that offsetting should come after genuine reduction efforts, not instead of them. A business that buys cheap credits while making no effort to reduce its own emissions is engaged in greenwashing, not climate action.
Where offsetting fits in a net zero strategy
The most widely accepted framework — used by the Science Based Targets initiative (SBTi), the Gold Standard, and most serious corporate net zero plans — places offsetting at the end of a mitigation hierarchy:
- Measure your emissions (Scope 1, 2, and material Scope 3)
- Reduce emissions in line with a science-based pathway
- Address residual emissions that cannot yet be eliminated with high-quality credits
The SBTi's Net-Zero Standard, published in 2021, specifies that companies must reduce their emissions by at least 90% before relying on offsets for the remaining 10%. This is a stricter standard than many businesses have historically applied — it rules out reaching "net zero" by simply buying enough credits to cancel out current emission levels.
What types of credits should UK businesses buy?
For UK businesses making voluntary net zero commitments, the categories most likely to withstand scrutiny are:
Gold Standard cookstove and household energy projects — well-verified, SDG benefits, $10–40/t. Defensible and widely accepted.
Blue carbon (mangrove and seagrass restoration) — growing credibility, strong permanence and biodiversity co-benefits, $15–35/t.
Reforestation and ARR projects — require careful selection (permanence risk from fire and disease), $15–50/t for high-quality projects with buffer pools.
Biochar removal credits — high quality but expensive ($100–250/t). Appropriate for residual emissions once the 90% reduction target is in sight.
Avoid: plain REDD+ avoidance credits below $8/t, old vintage renewable energy credits, and any project without a verifiable buffer pool or clear registry retirement record.
What does it cost for a typical UK SME?
| Business type | Typical annual footprint | Offset cost (Gold Standard ~$20/t) | Offset cost (biochar ~$150/t) |
|---|---|---|---|
| Professional services firm, 20 staff | 40–80t CO₂e | £640–1,280 | £4,800–9,600 |
| Retail shop with delivery operations | 80–200t CO₂e | £1,280–3,200 | £9,600–24,000 |
| Small manufacturer, 50 staff | 200–600t CO₂e | £3,200–9,600 | £24,000–72,000 |
Tool via The Carbon Workbench
These ranges assume USD/GBP at approximately 0.80. Prices fluctuate — always check current market rates before budgeting. The Carbon Workbench Verification Cost Estimator provides current cost estimates for different project types and scales.
How to buy credits as a UK business
The main routes for UK businesses are:
Directly from project developers — larger volumes, more control over project selection, requires more due diligence.
Via carbon brokers — brokers such as South Pole, Natural Capital Partners, or Fera aggregate supply and handle registry retirement. Suitable for most SMEs buying below 1,000t per year.
Via offset platforms — services like Patch, Watershed, or Supercritical offer curated credit portfolios with different quality tiers. Good for smaller volumes and businesses without specialist carbon expertise.
Whichever route you use, ask for: the registry retirement certificate, the project ID and standard, the vintage year, and confirmation that the credits have not been double-counted or pre-sold.
Key takeaway
Carbon offsetting is legitimate when used at the end of a genuine reduction strategy, not as a substitute for it. For residual emissions, expect to pay £10–30/t for defensible avoidance credits and £80–200/t for removal credits. Always get a registry retirement certificate and verify it independently.