Carbon Credit Offtake Agreements: What to Check Before You Sign

A carbon credit offtake agreement commits a buyer to purchase credits that a project expects to issue in future, usually across multiple deliveries. The crucial questions are when money moves, what qualifies as delivery and who carries the risk if the project under-delivers.

Clearly, a carbon credit is at its easiest to buy when most of the difficult work is over. The project has run, the carbon has been monitored, an independent verifier has checked the result and the credits have been issued. There is a registry record and a serial number. It’s like buying a bottle of wine as opposed to investing in the vineyard.

But nature projects aren’t so simple.

By the time there’s a verified tonne to buy, somebody may already have collected the seed, raised the seedlings, agreed the work with farmers or landholders and kept young trees alive through brutal heat and rainfall. Money’s been desperately needed throughout that period, long before there was an issued tonne to sell.

This is why carbon offtake agreements interest me. They can move a corporate commitment further upstream and help finance the early stage projects that net zero depends on.

But there is an important qualification which gets lost in a lot of the discussion around offtakes.

A promise to buy is not the same thing as money to build.

A  future offtake agreement reduces demand risk and reassures lenders. But it doesn’t fund this year’s carbon project, unless the buyer pays upfront or a lender will advance cash against the contract.

So my first question about any offtake is: does it bring in money now, or only promise it later?

A carbon credit offtake can do three different jobs

While the market talks about offtakes as if they were one product, they aren’t.

Let’s begin with the terminology. Four terms come up, and they overlap:

• Offtake: an agreement to buy a project’s future credits.
• Forward purchase: an agreement to buy credits at a set price, with delivery and usually payment later.
• Pre-purchase: the buyer pays some or all of the money upfront, before the credits exist.
• ERPA (Emission Reduction Purchase Agreement): a formal contract for buying future emissions reductions. IETA publishes standardised ERPA templates for primary and secondary carbon credit transactions (source).

To make matters more complicated, industry usage isn’t consistent across these terms either. Frontier, a carbon removal buying group co-founded in 2022 by Stripe, Alphabet, Shopify, Meta and McKinsey Sustainability, treats pay-on-delivery offtakes and pre-purchases as separate things (source). Others use “offtake” for deals that include advance payment.

Rather than argue over labels, ask what job the agreement is doing. There are three:

1. Future procurement: the buyer secures carbon it expects to need later.
2. Price and demand certainty: both sides fix a price, volume or formula instead of relying on the spot market.
3. Project finance: the deal gets money to the project before any credits exist.

These aren’t interchangeable. A ten-year pay-on-delivery deal can give strong demand certainty but almost no cash today. A shorter pre-purchase can deliver cash immediately and do far more to get a project built, but the buyer takes on much more delivery risk.

So length alone tells you little about an offtake’s value.

Carbon credit offtake finance starts with the payment schedule

When I look at an early-stage carbon arrangement, I want to know when the money moves.

It sounds almost too obvious, but it tells you more about the financing role of the transaction than the headline number of tonnes.

Suppose a company announces that it has agreed to buy 500,000 future tonnes. That number is impressive, but several other facts determine what the agreement has actually achieved.

Is 500,000 tonnes a firm minimum or a maximum that could eventually be purchased? Is any money paid at signing? Are there milestone payments? Does payment occur only after verification and issuance? Are there conditions that must be satisfied before the contract becomes effective? Can the agreement be used as security for debt? Has anybody actually lent against it?

Those questions should sit behind any serious offtake assessment, alongside the wider revenue stack, collateral, recourse and the finance actually secured.

They also stop us making a common mistake: treating the announced value of an offtake as though that amount of capital has entered the project.

Often it has not.

Carbon credit offtakes transfer risk as well as money

It’s worth pointing out that moving earlier in the project cycle has a consequence.

With an issued credit, much of the delivery risk has already passed. The buyer can inspect the methodology, monitoring report, verification statement, issuance and registry record. I give far more weight to those documents than to the project sales page because they answer what has actually happened, rather than why somebody thinks the project is attractive.

An offtake necessarily asks the buyer to make decisions with less finished evidence.

The methodology may be established, the project may have been validated and the developer may have an excellent record, but future issuance is still future issuance, so there’s risk there.

That means the buyer needs to assess something broader than carbon-credit quality: delivery-system readiness. A good methodology doesn’t, by itself, prove that the organisation, finance, land arrangements, monitoring systems and people required to deliver the projected outcome are all in place.

This becomes especially important when very large forecast volumes are being discussed. A model can forecast a million tonnes. It can’t plant a tree, resolve a land dispute, finance a field team or make a project operator solvent.

The further forward the purchase goes, the more of those questions belong in the buying decision.

Forecast carbon tonnes and issued carbon tonnes do different jobs

One consequence follows from this which I would make explicit in any corporate carbon strategy conversation.

Early project finance and claim-ready carbon procurement are different jobs, which is also why a carbon credit portfolio should keep them apart.

A company may have very good reasons to fund a project before its carbon is verified. In some cases that may be the most useful money the company provides. But a forecast tonne is not an issued tonne, and funding it does not create the same evidence as buying and retiring a verified credit.

I would therefore keep those two activities visible rather than trying to make one masquerade as the other.

One part of a portfolio might provide dependable issued credits for an identified reporting or retirement need. Another might deliberately take early project risk because the company wants to help make future climate action possible.

Both can be valuable.

They need different evidence and support different claims.

If the latest project record says that units are reported or forecast but awaiting verification, I would stop there if the company needs an ex-post verified outcome now. That does not make it a bad project. It makes it the wrong asset for that particular job.

Carbon credit offtake prices should not be compared with spot prices casually

The same problem as I’ve raised already appears with price.

A £20 issued tonne available for immediate transfer and a £20 future tonne under a seven-year contract are not necessarily the same economic proposition.

The future price may incorporate project risk, financing terms, a long commitment, delivery uncertainty, scarcity protection or a favourable allocation of future upside. The spot price relates to an asset that already exists.

In my view, carbon-price comparisons should therefore identify, at minimum:

• the date;
• whether the transaction is primary or secondary;
• whether it is spot or forward;
• whether the number is an executed price, bid, offer or modelled value;
• the project, methodology and vintage;
• issued or future status;
• volume and market depth;
• marketability and eligibility;
• supply lead time.

For an offtake I would add another question: what risk did the buyer accept in return for that price?

Without that, saying the buyer “locked in carbon at £20” tells us remarkably little.

Long-term carbon demand also has to be credible

The focus usually falls on whether the project can deliver, but the seller is making a long-term bet on the buyer as well.

A project that uses an offtake to obtain finance needs more than interest from a well-known company. It needs a purchasing obligation that survives for long enough, and under enough circumstances, to be relied upon.

That brings apparently dry contractual provisions into the centre of the climate-finance question: conditions precedent, termination rights, creditworthiness, change of control, force majeure, collateral and recourse.

A buyer may understandably want generous rights to walk away if its own climate strategy, regulation or market conditions change. A lender looking at exactly the same clause may conclude that the project’s future revenue is too uncertain to finance.

There is no way of removing that tension with clever terminology. Somebody has to carry it.

Nature-based carbon offtakes have a further question: who is carrying the downside?

Questions around risk become particularly important in community-led projects, such as the ones behind nature-based carbon credits.

Benefit sharing is usually discussed as a percentage: what share of carbon revenue reaches farmers, landholders or communities?

That is useful, but incomplete.

For a long-term agreement I would also want to understand who controls land and resources, who consented to the project design, who has decision rights, when people are paid, who controls the sale of the carbon and, particularly, who bears the cost when verification is late, issuance is lower than forecast or a reversal occurs.

Those are questions of governance and commercial agency, not simply social co-benefits.

Imagine a structure in which the corporate buyer pays only after issued credits arrive, while farmers and local organisations must carry several years of implementation cost before then.

That may be an entirely legitimate procurement contract.

I would hesitate to describe it as early project finance.

The distinction matters because the carbon market looks rather different from the project end. The neat finished unit is the last stage of a much longer process.

Carbon credit delivery risk belongs in the contract, not in a footnote

A projected volume is not a delivery guarantee.

A serious agreement should therefore make the failure path as explicit as the successful one:

forecast volume → shortfall or delay → cure → replacement or remedy → termination

The buyer needs to understand minimum quantities, cure periods, replacement-credit rules, make-good obligations and termination rights. Nature-based projects add further questions around reversal, permanence, wildfire, land-use change and the buffer or insurance mechanisms used to deal with those risks (source).

The same discipline applies to title.

The contract should define what qualifies as a deliverable credit, when title passes, what registry or programme requirements apply, and whether the buyer is receiving credits for transfer, retirement or some other agreed use.

The commercial chain is:

project → methodology → monitoring → verification → issuance → delivery → title/payment → retirement

If the company cannot explain that chain, it does not yet understand what it has bought.

Carbon credit offtakes are already being used at material scale

The structure is no longer confined to experimental transactions.

In engineered carbon removal, Stockholm Exergi and Microsoft expanded their agreement in 2025 to cover 5.08 million tonnes of permanent carbon removals over ten years (source).

Nature-based markets are using long-term agreements too. Symbiosis-backed agreements announced with Living Carbon in 2026 cover 131,240 tonnes over ten years from reforestation of former mine and degraded agricultural lands (source).

These examples are useful because they show the breadth of the structure, not because their contracts should be treated as interchangeable.

The term offtake tells you that future supply and future demand have been connected. Everything important lies in the terms under which that connection has been made.

When a carbon credit offtake makes sense for a business

I would not use one merely because an organisation expects to keep buying carbon for several years.

If credits are required for retirement this year, issued units are normally the straightforward place to begin. The delivery question has already been answered.

An offtake becomes more interesting where a company has a reasonably predictable multi-year requirement, wants access to a particular kind of future supply, is willing to accept delivery risk in exchange for that access, or deliberately wants its commitment to help support project development, which is a form of beyond value chain mitigation.

The decision should become harder, not easier, as the term gets longer.

A ten-year agreement means making assumptions about the company’s own requirements, the carbon market, the project, the methodology and the regulatory environment a decade from now.

That does not make the agreement unattractive. It means flexibility has value.

Volume bands, review points, quality provisions, substitution rights and carefully drafted change clauses may matter considerably more after year six than the polished forecast that helped get the contract approved in year one.

A carbon credit offtake should leave the buyer able to explain who carries each risk

This is ultimately what I would want from an offtake review.

Not a generic judgement that the contract is “high integrity”. Not reassurance that a recognised standard appears on the front page. Not even a good carbon price in isolation.

I would want to be able to trace the transaction.

What is being promised? What must happen before it becomes a deliverable credit? Who pays before that point? What volume is genuinely firm? What evidence will establish delivery? What happens to a shortfall? Who carries reversal risk? Can the seller substitute other credits? What happens if the methodology changes? What security exists if one of the parties fails? And has the agreement actually changed the project’s ability to raise money?

Once those questions are answered, the label offtake becomes much less interesting.

The structure may turn out to be an excellent way of securing future carbon. It may be genuinely catalytic finance. It may do both.

But those conclusions have to be earned from the cash flows, evidence and allocation of risk rather than inferred from the length of the contract.

How C Level approaches long-term carbon project agreements

C Level was founded in 2000 to use carbon measurement as a way of directing business funding into nature and communities. That history matters here because an offtake sits between two worlds which are often discussed separately: the corporate buyer looking for a defensible future supply of carbon, and the project trying to finance years of work before the finished carbon asset exists.

C Level’s approach is therefore to separate four things that are often collapsed together:

1. The project. Is the underlying activity credible, governed properly and capable of being delivered?
2. The future carbon. What is forecast, what has been validated or verified, and what still has to happen before issuance?
3. The finance. When does cash actually reach the project, and has the agreement materially improved its ability to raise or deploy capital?
4. The buyer’s evidence. What will the company ultimately own, retire, report or claim, and what documents will support that use?

Whether the agreement is called an offtake, forward purchase, prepurchase or ERPA matters less than those four answers.

For a serious buyer, that is where the decision should begin.

Buyer checklist: questions to establish before signing a carbon credit offtake

• What is the exact project and carbon outcome?
• Which standard, methodology and methodology version apply?
• What project stage has actually been reached?
• Are the tonnes forecast, validated, verified, issued or already available?
• What volume is genuinely committed rather than a headline maximum?
• Is volume fixed, output-linked or subject to minimum and maximum bands?
• When is payment made?
• Is there prepayment, milestone funding or payment only on delivery?
• What conditions precedent must be satisfied?
• What qualifies as a deliverable credit?
• When does legal title pass?
• What registry transfer or retirement process applies?
• What happens if verification or issuance is delayed?
• What happens if the project under-delivers?
• Are replacement credits permitted and, if so, what quality criteria apply?
• What reversal or permanence mechanisms apply?
• What collateral, security or recourse exists?
• Can either party terminate because rules, methodologies or market conditions change?
• Has the offtake actually helped the project secure finance?
• For community-led projects, who bears delay, reversal and failure risk?
• What evidence will the buyer keep after each delivery?
• What claim or reporting use is the buyer expecting the delivered credits to support?

Sources and methodology

The facts, frameworks and documents named in this article, with where to read each one.

• Frontier, Offtake Agreement Template. Source for contract structure, pay-on-delivery terms, conditions precedent, qualifying issuance, delivery and title transfer. View the template.
• Frontier, Disclosures. Source for the difference between offtakes and prepurchases. View the disclosures.
• IETA, Trading Documents. Source for emission reduction purchase agreement (ERPA) documentation and contracting terms. View the documents.
• CrossBoundary Group, Carbon Offtake Guide. Source for nature-based project finance, delivery risk and shortfall and security terms. View the guide.
• Symbiosis Coalition, FAQs. Source for nature-based offtakes, reversal risk and landholder and community considerations. View the FAQs.
• ISDA, Voluntary Carbon Credit Definitions. Source for contract definitions of spot, forward and option transactions in voluntary carbon credits. View ISDA.
• Stockholm Exergi, Stockholm Exergi extends landmark carbon removal agreement with Microsoft. Source for the 5.08 million tonne, ten-year agreement announced in 2025. View the announcement.
• Living Carbon, new carbon offtake agreements with Symbiosis. Source for the 2026 agreements covering 131,240 tonnes over ten years. View the press release.
• MSCI, USD 22 billion points to future carbon market demand. Market context for the growth in announced offtake agreements. View the analysis.