How to Choose a Carbon Offset Provider in 2026

Choose a carbon-offset provider on five tests: certified standards (Verra/Gold Standard), proof of retirement in your name, transparent project detail, traceability you can show stakeholders, and reporting you can drop into ESG disclosures. Price matters less than whether the claim survives an audit — a cheap tonne you cannot evidence is a liability, not a saving.

The five tests

• Certification. Only buy credits issued under recognised standards such as Verra's VCS or Gold Standard. No registry, no deal.
• Retirement proof. The provider must retire credits on your behalf and hand you the registry documentation, with your organisation named as beneficiary.
• Project transparency. You should know exactly which project, where, what type and under which methodology — before you pay, not after.
• Traceability. Extra credibility if the impact is visible: geolocated trees, satellite monitoring, field footage.
• Reporting. Data formatted for ESG use — tonnes, vintages, certificates, dates — not a PDF brochure.

Know which kind of supplier you are talking to

“Offset provider” covers three quite different businesses, and the differences show up in price and in what they can actually promise:

• Project developers originate and run the projects. Closest to the source, often the best price at volume, usually narrower choice.
• Brokers and retailers buy from developers and resell in smaller lots. Convenient and flexible; ask how the margin is set and where the credits come from.
• Platforms bundle sourcing, retirement, reporting and often engagement tooling. Most practical for companies without a carbon team, provided the underlying credits and registry proof are fully disclosed.

None of these is inherently better. What matters is that whichever one you are dealing with can answer the next section's questions without hesitating.

Nine questions to ask on the first call

1. Which standard and which methodology — including the version?
2. Which specific project, and where exactly?
3. Is this a removal or an avoidance credit?
4. What vintage are the credits?
5. Who was the independent auditor?
6. Will the credits be retired in our name, and how quickly after payment?
7. Can we see the serial numbers and look up the retirement publicly?
8. For forestry: what is the buffer pool contribution and the monitoring plan?
9. What exactly may we claim in public, and in what wording?

A good supplier answers all nine in one call. A supplier who treats them as unusual is telling you something useful.

Red flags

Vague “we plant trees somewhere” claims, no named standard, no retirement serials, prices that seem too good for the project type, and providers who cannot say which registry holds the credit. Add three more that catch people out: credits promised but retired months later; a portfolio that changes after you have signed; and marketing copy that offers you a “carbon neutral product” claim without mentioning that consumer-facing versions of that claim face new EU restrictions from September 2026. If a claim cannot be verified by a third party, it cannot go in your report.

What good documentation looks like

When the purchase completes, you should receive — without having to chase — the project name and registry ID, the methodology and vintage, the number of tonnes, the serial number range, the retirement date, your organisation named as the beneficiary, and a link to the public registry record. Keep it with your ESG file. That package is what turns a purchase into a defensible claim, and it is the difference between offsetting and greenwashing.

How Evertreen answers the five tests

Evertreen provides Verra- and Gold Standard-certified credits retired on your behalf with documentation, publishes the project detail behind each credit, and adds what most providers cannot: geolocated, satellite-monitored tree planting from £1.5 per tree, with videos filmed by the planting teams — impact your stakeholders can see rather than just read.

Start from your footprint with the CO₂ calculator. If you are still choosing between standards, read Verra vs Gold Standard; for budgeting, see how much carbon offsets cost.

Frequently asked questions

What should I ask an offset provider first? Which standard certifies the credits, and whether retirement happens in your name with registry proof you can look up yourself.

Are cheaper credits worse? Not automatically — price varies legitimately by project type, vintage and geography. But unverifiable cheap credits are a reporting risk, and a price far below the market for that project type deserves an explanation.

How do I know the credits were actually retired? Ask for the serial numbers and check the public registry record. A genuine retirement names your organisation and cannot be reversed or resold.

Should I buy direct from a project developer? If you have the volume and the internal expertise, it can be cheaper. Most companies value the sourcing, retirement and reporting a platform handles for them.

How long should retirement take? Agree it in writing before you buy. Weeks is normal; open-ended is not.

Do I need a provider at all, or can I just plant trees? Planting and certified credits are different instruments. Trees give visible, growing removal; credits give audited tonnes now. Many companies budget for both.

Why combine offsets with tree planting? Credits give audited tonnes today; geolocated planting adds visible, growing removal and genuine engagement value with staff and customers.