Carbon Removal Investing: What Accredited Investors Need to Know

TL;DR: Frontier, the advance market commitment backed by Stripe, Alphabet, Shopify, Meta, and McKinsey, has pledged to buy $1.8 billion worth of permanent carbon removal by 2040, and corporate offtake contracts for engineered carbon dioxide removal reached $279 million in 2024 alone, establishing engineered CDR as a serious emerging asset category for accredited investors willing to tolerate pre-commercial technology risk.

Carbon Removal Is Not a Carbon Offset

Start with the distinction that matters most for every investor entering this space. The voluntary carbon market has spent years under deserved scrutiny for selling avoidance credits, agreements that supposedly prevent a forest from being cut down or reduce methane that might otherwise have been released. Academic and investigative analyses found that many of these credits do not represent actual reductions in atmospheric CO₂, and prices for conventional forestry offsets have fallen to low single digits per ton as buyer confidence has eroded.

Engineered carbon removal is a categorically different claim. Direct air capture (DAC) machines draw CO₂ from ambient air through chemical processes and inject it underground in mineral or geological form. Biochar converts organic waste into a stable carbon structure that stores CO₂ for centuries when worked into soil. Enhanced weathering spreads crushed silicate rock on farmland, where natural chemical reactions bind CO₂ into dissolved bicarbonate that migrates to the ocean. Charm Industrial converts biomass waste into bio-oil and pumps it roughly 3,000 feet underground into geological formations where it remains permanently.

None of these approaches merely avoids an emission. Each physically removes CO₂ already present in the atmosphere. That distinction drives every meaningful difference in price, verification complexity, and investor calculus.

The verification challenge is real, and the market has responded with purpose-built certification infrastructure. Isometric, the largest certifier of carbon removal by contracted volume, holds full accreditation from the Integrity Council for the Voluntary Carbon Market (ICVCM), ICROA, and CORSIA. Its fee structure charges buyers rather than project developers a flat amount per offtake, removing the financial incentive toward overcounting that compromised earlier offset registries. Puro.earth, a parallel registry, issued the first DAC-specific credits — all originating from Climeworks facilities in Iceland.

How the Market Is Structured

Carbon removal credits do not trade on any exchange you can access through a brokerage account. The market runs almost entirely on bilateral contracts called forward purchase agreements, or offtakes. A corporate buyer commits to pay a specified price per ton for future delivery, typically three to seven years out. The developer uses that contract as revenue evidence to attract additional equity, which funds the physical infrastructure needed to actually produce and deliver the tons.

Frontier functions as the market's largest demand aggregator. It is a public benefit LLC wholly owned by Stripe that pools buyer commitments and uses professional technical staff to vet suppliers and structure deals on those buyers' behalf. Frontier's 2024 annual letter reports $279 million in offtakes that year, up from $166 million in 2023, across seven companies spanning four removal pathways. A subsequent round totaling $264 million followed in 2025. Frontier's buyer coalition now includes Stripe, Alphabet, Shopify, Meta, McKinsey, Salesforce, JP Morgan Chase, Workday, and Autodesk, among others, each contributing an annual budget that Frontier's technical team deploys against vetted suppliers.

Microsoft operates separately from Frontier and has become the single largest buyer of durable CDR by contracted volume. According to CDR.fyi's market leaderboards, Microsoft has purchased over 37 million tonnes in forward contracts. Stockholm Exergi sold 3.3 million tonnes to Microsoft in 2024 in what became the largest single durable CDR deal on record.

The overall market contracted nearly 8 million tonnes in 2024, a 78% increase from 2023. CDR.fyi's 2024 Year in Review reports that 318,600 tonnes were actually delivered and verified that year, a delivery-to-booking ratio of 4.4%. That gap does not indicate fraud. It reflects companies scaling physical capacity on the back of contractual revenue before reaching full operational output. Investors should treat forward-contracted volume as a leading indicator of future revenue potential, not as current cash flow.

Key Players You Should Know

Company / Entity	Role	Notable Fact
Frontier	Advance market commitment / demand aggregator	$1.8B committed by 2040; $279M in 2024 offtakes
Climeworks	Direct air capture developer (Switzerland/Iceland)	Raised $162M in 2025; cumulative funding over $1B
Heirloom	DAC developer using accelerated limestone (US)	$150M Series B closed December 2024; first commercial US DAC facility in Tracy, CA
Charm Industrial	Bio-oil geological injection (US)	2,500 tons injected in 2024; eight pyrolyzers running continuously
Isometric	Carbon removal verification registry	Largest certifier by contracted volume; charges buyers, not developers
Puro.earth	Carbon removal verification registry	First registry to issue DAC-specific credits

The Pricing Gap Between Offsets and Removal

Conventional avoidance credits trade at low single-digit prices per ton on voluntary markets. Engineered removal commands far more, for verifiable reasons: physical infrastructure, energy inputs, geological storage contracts, and independent measurement all carry real costs that avoidance credits do not require. A buyer paying $300 per ton for a verified biochar credit purchases a fundamentally different climate claim than one paying $5 per ton for a forestry offset.

Based on 67 offtake-type deals tracked through early 2026, the cCarbon DAC Market Compass 2026 reports disclosed prices ranging from $100 per ton (a Holocene-Google forward purchase) to $989 per ton (early Frontier prepurchases), with a median near $650 per ton for direct air capture offtakes. CDR.fyi's 2024 Year in Review found that the weighted average price across all durable removal methods fell from $490 per ton in 2023 to $320 per ton in 2024, reflecting learning-curve effects and growing supplier competition as the market added new entrants.

Frontier's criteria for suppliers require a credible path to under $100 per ton at commercial scale. That is not today's reality for DAC, where cost structures remain dominated by energy costs and capital equipment. It is, however, the economic logic behind the advance market commitment structure: secure committed buyers now, fund scale-up through contracted revenue, and converge toward cost-competitiveness as production volumes grow.

How an Accredited Investor Gets Exposure

There is no CDR exchange-traded fund. You cannot purchase a carbon removal futures contract on a regulated exchange. The investment paths that actually exist fall into three categories: direct equity in project developers, positions in climate-tech funds, and indirect exposure through publicly traded corporate buyers.

Direct equity means participating in private funding rounds for carbon removal developers. Heirloom's $150 million Series B, co-led by Future Positive and Lowercarbon Capital with participation from Japan Airlines, Mitsubishi Corporation, Mitsui, and Siemens Financial Services, closed in December 2024. Climeworks raised $162 million in 2025, the largest single carbon removal investment round globally that year, bringing its total to more than $1 billion since inception. Accessing these rounds typically requires a relationship with the lead venture firm, co-investment rights through a fund LP slot, or a direct relationship with company management. Accredited investor status is a floor condition, not sufficient on its own.

The second path runs through dedicated climate-tech venture or growth-equity funds. Lowercarbon Capital, Breakthrough Energy Ventures, Carbon Direct Capital, and MCJ Collective have each built specific CDR positions in their portfolios. Most require LP commitments of $250,000 or more. A fund position spreads technology risk across multiple removal pathways but adds management fees and carried interest, and reduces your control over which specific companies receive capital.

The third path is indirect exposure through publicly traded companies with active CDR offtake programs. Microsoft, Alphabet, and Shopify all carry multi-year CDR forward purchase agreements as part of their climate commitments. Owning their equity gives you no pure-play CDR upside if carbon credit prices rise, but it connects returns to management teams that have committed real capital to engineered removal over time.

Frontier also launched a program called Climate Orders in 2024, allowing any buyer to purchase removal credits directly through the Frontier platform. That is a procurement tool, not an investment vehicle, but it gives any accredited investor a low-barrier way to learn how offtake agreements work before committing equity capital.

Risks You Cannot Ignore

Three structural risks are core to the investment thesis. You need to weigh each before deploying capital in this category.

Technology immaturity at commercial scale is the first. DAC's two largest commercial facilities, Climeworks' Mammoth plant in Iceland and 1PointFive's STRATOS facility in Texas (designed for 500,000 tons per year), represent the sector's most consequential near-term test of whether this field can convert contracted capacity into verified tonnes at scale. Delivery shortfalls and registry verification delays already affected some Frontier portfolio companies operating first-of-a-kind infrastructure in 2025, as Frontier's own annual reporting acknowledged. Building and commissioning novel physical plants on time and on budget consistently produces surprises that bench-scale testing cannot reveal.

MRV uncertainty is the second risk. Enhanced weathering and ocean alkalinity enhancement methods rely on modeling and proxy measurements rather than direct molecular tracking. Isometric and Puro.earth apply rigorous scientific standards, but uncertainty bands on removal quantities remain meaningful. A credit claiming 1,000 tonnes removed may represent actual removal ranging from 850 to 1,200 tonnes depending on the protocol's confidence intervals. Ask any developer what uncertainty discount, if any, they apply to reported tonnes when negotiating offtake prices.

Demand concentration is the third. The US Section 45Q tax credit pays approximately $180 per ton for geologically stored CO₂ captured from air and has been a meaningful driver of DAC investment domestically. Beyond policy, voluntary corporate demand is even more concentrated: CDR.fyi found that Microsoft alone accounted for 64% of all durable CDR purchased in 2024. A shift in Microsoft's sustainability budget or purchasing strategy would reshape the market for many developers simultaneously.

The venture funding environment reinforces the case for caution. $836 million in equity capital flowed into durable CDR companies in 2024, a 30% decline from 2023's $1.2 billion, as investors waited to see which developers could secure meaningful sales before committing to follow-on rounds. Some companies that raised pre-commercial capital in 2022 and 2023 will not survive to first delivery revenue.

Frequently Asked Questions

Is buying a carbon removal credit the same as investing in a carbon removal company?

No. A forward purchase agreement transfers future tonnes of verified CO₂ removal to the buyer; it is a procurement contract, not a security. Investing in a carbon removal developer means taking equity, which provides upside if the company grows and full downside if it fails. Many sophisticated corporate buyers, such as Stripe, Google, and Microsoft, do both: they sign offtake agreements to secure the removal claim and make separate equity investments to support the developer's growth and influence their technology pathway.

How does the US Section 45Q tax credit affect the investment analysis?

The 45Q credit pays approximately $180 per ton for CO₂ stored geologically via direct air capture, which can cover a meaningful share of current DAC cost structures and reduces the break-even price at which US developers can profitably deliver credits to buyers. If 45Q is reduced, allowed to expire, or limited through regulatory change, DAC projects in the United States become significantly less attractive economically, which would affect valuations for US-based DAC developers in a portfolio. Projects in Iceland, Canada, or Switzerland operate under different subsidy regimes and carry distinct policy risk profiles.

What makes Isometric different from older carbon registries like Verra?

Isometric was built specifically for engineered carbon removal and charges buyers rather than project developers, structurally removing the incentive toward overcounting. Older registries such as Verra were designed primarily for nature-based and avoidance credits and have faced credibility problems when independent researchers found significant overcounting in certified forestry projects. Isometric's standard also requires that all data, calculations, and evidence be publicly available, making verification transparent to any party rather than relying on internal audit processes alone.

Can I invest in a carbon removal company through a self-directed IRA?

A self-directed IRA can hold private equity investments, including shares in private carbon removal developers, provided the custodian permits alternative assets and the investment structure avoids IRS prohibited transaction rules. You cannot hold carbon removal credits themselves as an IRA asset under current IRS guidance, as these are procurement contracts rather than recognized financial instruments for retirement account purposes. Consult a tax advisor who specializes in self-directed IRAs and alternative assets before structuring any CDR investment inside a retirement account, as violations carry significant penalties.

Author Disclosure: Jeff Barnes, MBA has no personal position in any company, fund, or platform named in this article. Angel Investors Network has no current commercial relationship with any party mentioned. AIN provides marketing and education services, not investment advice. Past performance does not guarantee future results. All investments involve risk, including loss of principal.