Carbon Offset Subscriptions: How to Choose One

A carbon offset subscription buys and retires carbon credits for you every month, usually sized to an estimate of your own footprint. Done well, it is a simple way to fund verified climate projects for the emissions you haven't been able to cut yet. Done badly, it is a monthly payment for claims nobody can check.

This guide gives you eight questions to ask any provider before you sign up, the red flags to watch for, and how to choose between paying monthly, paying once or paying for a full year.

In short: cut what you can first and measure the rest. Then pick a plan that retires credits on a public registry and lets you check them, shows its price per tonne, lets you change or cancel the plan at any time, and is honest about what you can claim.

What a carbon offset subscription is

A carbon credit represents one tonne of CO₂e that a project has reduced or removed from the air, measured under a standard and recorded on a registry. When a credit is used to back a claim, it is retired: the registry marks it as used so nobody can sell it or count it again.

A subscription is a recurring purchase of those credits. It suits the part of your footprint that comes back every month, such as heating, commuting and food. A one-off purchase suits a single event, such as a flight.

A subscription doesn't replace cutting your own emissions. Since 27 September 2026, EU consumer law (Directive (EU) 2024/825) has banned companies from claiming, on the basis of offsetting, that a product has a neutral, reduced or positive impact on the climate. A good provider tells you what its credits fund, not that your life has become good for the climate.

Measure before you subscribe

A plan should be sized to something real. Estimate your footprint first with a carbon footprint calculator, then subscribe for part or all of what is left after the cuts you plan to make. Calculator results are estimates, so a plan that lets you change the monthly amount later is worth more than one fixed at sign-up.

Eight questions to ask any provider

Ask them of every plan you compare, including ours.

1. Standards and registries

Which standard certifies the credits, and which registry records them? Recognised programmes such as Verra's Verified Carbon Standard, Gold Standard, Climate Action Reserve and Puro.earth record every credit on a public registry. If a provider can't name the standard and the registry, you can't check anything else it tells you. Our guide to carbon offset certification standards explains the main ones.

2. Retirement and serial numbers

Are the credits retired, and can you see the record? Retirement is the step that takes a credit out of circulation. Ask whether you get a certificate for each purchase and whether it points to the registry record, with serial numbers or an order you can look up. A credit that is only "allocated" to you can still be sold to someone else.

3. When credits are retired

Are your credits retired each month, or pooled and retired later? Either can work. What matters is that the provider says which, and that you can see the retirement once it has happened.

4. Avoidance or removal, and for how long

What kind of projects do the credits come from? Some projects avoid or reduce emissions, for example by protecting a forest or replacing polluting cookstoves. Others remove CO₂ from the air and store it: in trees and soils for decades, or in rock for much longer. The Oxford Offsetting Principles recommend shifting over time towards removals with long-lived storage. A good plan tells you its mix and why.

5. How projects are checked

Who checks the projects, and what happens if one fails? Independent verification under the standard is the minimum. You can also ask whether the credits meet the Core Carbon Principles of the Integrity Council for the Voluntary Carbon Market, an international benchmark for things like additionality, permanence and robust quantification. Ask how the provider chooses projects and what it does if a project's credits later turn out to be overstated. Our guide on how to verify carbon credit quality goes deeper.

6. Price per tonne

What does one tonne cost, and how many tonnes does the plan cover? Compare plans by their price per tonne of CO₂e, not their price per month: a cheap monthly plan may cover very few tonnes. Check that the plan states how much CO₂e it retires each month, and in which currency you pay.

7. Changing or cancelling

Can you change the amount or cancel at any time? Look for no minimum term, no cancellation fee and a way to cancel online without writing to customer support. Your footprint changes when you move, change jobs or travel less, and the plan should follow.

8. What you can say afterwards

What does the provider let you claim? An honest claim describes what happened: "I fund verified climate projects, and 300 kg of CO₂e is retired for me every month." Be wary of a plan that sells you a label for yourself, your home or your trips instead.

Red flags

• Promises that offsetting makes you, your home or a trip "neutral" or "good for the climate".
• No standard or registry named, no certificate and no way to look up retirements.
• Prices per tree or per month with no tonnes of CO₂e stated.
• Long minimum terms, cancellation fees, or cancelling only by email or phone.
• Advice to buy credits instead of cutting your own emissions.

Monthly, once or a full year?

Plan	Suits	Watch for
Monthly subscription	The footprint you have every month: home, commuting, food, shopping	A monthly amount that still matches your footprint; easy cancelling
One-off purchase	A single flight, trip or event	Sizing it to that trip or event, not a guess
Full year upfront	Covering a year in one payment	What happens if you cancel part way through

How Coffset's subscription works

Here are the same answers for Coffset, so you can compare.

• Price: €0.04 per kg of CO₂e (€40 a tonne). A monthly subscription is 10% cheaper, and you can also pay once or for a full year on the buy page.
• Retirement: credits are retired through CNaught, and every purchase comes with a certificate.
• Projects: the impact portfolio has 22 projects, organised by the Oxford Principles from emissions reductions to long-lived removal, and certified under standards including Verra's Verified Carbon Standard, Gold Standard, Climate Action Reserve and Puro.earth. How we choose projects explains the review and what happens if a project fails.
• Cancelling: the subscription can be cancelled at any time.
• Measuring: the calculator is free and needs no account. Its results are estimates, not audited greenhouse-gas inventories.

See the monthly plan, or if you are still comparing, read our wider guide to carbon offset programs for individuals.