Carbon offsets vs carbon removals: permanence, pricing, and credibility compared

Corporate buyers retired over 160 million voluntary carbon credits in 2023, yet a growing body of evidence suggests that a significant share of traditional offset credits fail to deliver the climate benefits they claim. Meanwhile, durable carbon dioxide removal (CDR) technologies have scaled from nearly zero to over 2 million tons of contracted capacity, with buyers like Microsoft, Stripe, and JPMorgan paying 10 to 100 times more per ton for the promise of permanent atmospheric CO2 reduction. Understanding the difference between these two instruments is no longer optional for any organization making credible climate commitments.

Why It Matters

The distinction between carbon offsets and carbon removals sits at the center of climate strategy credibility. An offset credit typically represents an avoided or reduced emission somewhere else, such as protecting a forest that might otherwise be logged or distributing cleaner cookstoves. A carbon removal credit represents CO2 that has been physically drawn out of the atmosphere and stored durably, whether through direct air capture, enhanced rock weathering, or biochar.

This distinction matters because the atmosphere does not differentiate between a ton emitted and a ton theoretically avoided. When a company claims carbon neutrality through offsets, it relies on a counterfactual: what would have happened without the project. Research published in Science in 2023 found that the majority of rainforest protection credits certified by Verra, the largest offset registry, did not represent real emissions reductions. The baseline deforestation scenarios had been significantly overstated.

For corporate buyers navigating net-zero commitments, the Science Based Targets initiative (SBTi) now distinguishes between compensation (offsets used alongside reduction) and neutralization (removals used to address residual emissions). The Oxford Principles for Net Zero Aligned Carbon Offsetting recommend shifting procurement toward permanent removals over time, reaching 100% durable CDR by 2050.

The market is responding. Frontier, a $1 billion+ advance market commitment founded by Stripe, Alphabet, Meta, Shopify, and McKinsey, exclusively purchases permanent carbon removal. The voluntary carbon market as a whole reached approximately $2 billion in 2023, with removal credits commanding a growing share of total value despite representing a small fraction of volume.

Key Concepts

Carbon Offsets (Avoidance and Reduction Credits)

Carbon offsets represent emissions that were prevented from entering the atmosphere or reduced relative to a projected baseline. Common project types include:

Avoided deforestation (REDD+) protects forests that models predict would otherwise be cleared. These credits have faced the most scrutiny, with multiple peer-reviewed studies finding that actual deforestation rates were far lower than baseline projections assumed. Verra retired its previous methodology and introduced consolidated REDD+ rules in 2024 to address these concerns.

Renewable energy credits fund solar or wind projects, primarily in developing countries. As renewable energy becomes economically competitive globally, additionality (whether the project would have happened anyway) has become increasingly difficult to demonstrate.

Cookstove and methane avoidance projects distribute efficient cooking equipment or capture methane from landfills and farms. These projects often deliver genuine co-benefits including health improvements and local pollution reduction, though quantifying precise emission reductions remains challenging.

Carbon Removals (CDR Credits)

Carbon dioxide removal physically extracts CO2 from the atmosphere and stores it. Key approaches include:

Direct air capture (DAC) uses chemical processes to filter CO2 from ambient air. Climeworks operates the world's largest DAC plant, Mammoth, in Iceland with 36,000 tons per year of capture capacity. The captured CO2 is mineralized in basalt rock formations for geological storage lasting thousands of years.

Enhanced rock weathering spreads crushed silicate minerals (typically basite or olivine) on agricultural land, accelerating a natural process where minerals react with atmospheric CO2 and lock it into stable carbonates. Carbon Run and UNDO are deploying at scale across multiple countries, with current costs of $100 to $250 per ton.

Biochar converts biomass into stable carbon through pyrolysis (heating without oxygen) and applies the resulting material to soil, where it can persist for hundreds to thousands of years. Companies like Carbofex and Pacific Biochar produce biochar at costs ranging from $100 to $300 per ton of CO2 equivalent.

Biomass carbon removal and storage (BiCRS) captures CO2 from biomass combustion or fermentation and stores it geologically. Charm Industrial injects bio-oil underground, while several bioenergy with carbon capture and storage (BECCS) facilities operate in the ethanol sector.

Permanence

Permanence refers to how long the carbon stays out of the atmosphere. This is the single most important differentiator between offset types:

• Geological storage (DAC + mineralization, BiCRS with geological injection): 10,000+ years
• Enhanced rock weathering: 10,000+ years once mineralized
• Biochar: 100 to 1,000+ years depending on production temperature and soil conditions
• Forestry offsets: 30 to 100 years if the forest survives fires, disease, and policy changes
• Soil carbon: 10 to 100 years, highly variable and reversible
• Avoided emissions: No stored carbon; the benefit exists only as long as the counterfactual holds

Head-to-Head Comparison

Dimension	Traditional Offsets	Carbon Removals (CDR)
Mechanism	Avoid or reduce emissions elsewhere	Physically remove CO2 from atmosphere
Permanence	Varies; often 10 to 100 years, reversible	100 to 10,000+ years for durable methods
Price per ton	$2 to $30 (nature-based); $1 to $10 (renewables)	$100 to $600+ (engineered); $30 to $150 (biochar, ERW)
Verification confidence	Moderate to low; dependent on counterfactual baseline	High for engineered methods; moderate for nature-based removal
Additionality risk	High; hard to prove project would not have happened	Lower; most CDR projects depend on credit revenue
Reversal risk	Significant for forestry (fire, logging, policy change)	Very low for geological storage; low for biochar
Scale (2024)	~300 million credits issued annually	~2 million tons contracted; <500,000 delivered
SBTi alignment	Accepted for Beyond Value Chain Mitigation only	Accepted for residual emission neutralization
Co-benefits	Biodiversity, community income, health	Soil improvement (biochar, ERW), permanent storage
Market maturity	Established registries, liquid market	Early stage, advance purchase agreements dominate

Cost Analysis

The price gap between offsets and removals remains substantial but is narrowing for some CDR pathways.

Traditional offsets trade at $2 to $30 per ton on the voluntary market. REDD+ credits, once commanding $10 to $15 per ton, dropped to $3 to $8 following integrity concerns. High-quality cookstove credits remain in the $15 to $30 range. Compliance market allowances (EU ETS) trade at $60 to $80 per ton but are a separate instrument.

Engineered carbon removal costs $400 to $1,000+ per ton for direct air capture as of early 2026, though Climeworks targets $300 to $350 by 2030 and below $200 by 2035 through scaling and learning-by-doing. The U.S. Department of Energy's Carbon Negative Shot initiative targets $100 per ton for gigaton-scale removal. Early buyers like Microsoft have contracted DAC credits at $600 per ton from Heirloom Carbon.

Nature-based removal such as enhanced rock weathering and biochar sits at $30 to $300 per ton, bridging the gap between cheap offsets and expensive engineered removal. These methods offer genuine atmospheric CO2 removal with moderate to high durability at prices that more procurement budgets can absorb today.

Blended portfolios are emerging as a practical strategy. Frontier recommends that corporate buyers allocate a portion of their carbon spend to durable removal even at high prices, using the remainder for high-quality avoidance credits. This approach funds the innovation pipeline while delivering near-term climate benefits.

Use Cases and Best Fit

When Traditional Offsets Make Sense

• Early-stage companies with limited budgets that want to begin compensating for emissions while building reduction plans
• Scope 3 hotspots where offsets fund supply chain decarbonization in regions lacking clean alternatives (efficient cookstoves, methane capture at small farms)
• Beyond Value Chain Mitigation under SBTi, where companies invest in climate action outside their value chain alongside direct reduction targets
• Community co-benefit priorities where biodiversity protection, local employment, and health improvements matter as much as the carbon math

When Carbon Removals Make Sense

• Net-zero target claims where SBTi and Oxford Principles require neutralizing residual emissions with permanent removal
• High-credibility sectors (financial services, technology) where greenwashing risk from low-quality offsets exceeds the cost premium of CDR
• Long-term climate strategy where locking in removal contracts now secures supply at lower prices as the market matures
• Hard-to-abate residual emissions (aviation, cement, agriculture) where some emissions cannot be eliminated through operational changes

Portfolio Approach

Most sophisticated buyers now construct blended portfolios. Microsoft's 2024 Environmental Sustainability Report reveals procurement across multiple CDR pathways: biochar, enhanced weathering, direct air capture, and biomass carbon removal. The company contracted 5.3 million tons of carbon removal between 2021 and 2024, with an average cost that decreased as the portfolio diversified beyond DAC alone.

Decision Framework

Step 1: Quantify your residual emissions. After implementing all feasible reduction measures, identify the emissions that genuinely cannot be eliminated with current technology. These are the tons that need removal, not offsets.

Step 2: Set a credibility threshold. Determine your organization's tolerance for integrity risk. Public-facing consumer brands face higher reputational risk from offset scandals than B2B infrastructure companies. Higher credibility needs push toward removals.

Step 3: Establish a permanence floor. Decide the minimum storage duration your climate claims require. SBTi-aligned net-zero targets need durable removal. Interim compensation goals can use shorter-duration credits.

Step 4: Allocate budget across tiers. A practical split for companies beginning their journey: 60% high-quality avoidance/reduction offsets with strong co-benefits, 25% nature-based removals (biochar, enhanced weathering), 15% engineered removal (DAC, BiCRS). Shift toward removals annually.

Step 5: Verify independently. Use registries with third-party verification (Puro.earth for removals, Gold Standard or Verra with updated methodologies for offsets). Review project documentation rather than relying on registry certification alone. Isometric and Carbonfact provide independent CDR verification.

Step 6: Disclose transparently. Report offset and removal purchases separately. Never claim removal-grade benefits for avoidance credits. Follow the Voluntary Carbon Markets Integrity Initiative (VCMI) Claims Code of Practice for credible communication.

Key Players

Offset Registries and Standards

• Verra (VCS) operates the largest voluntary offset registry with over 1,900 certified projects globally
• Gold Standard certifies credits with mandatory sustainable development co-benefits across 90+ countries
• American Carbon Registry and Climate Action Reserve focus on North American compliance and voluntary markets

Carbon Removal Companies

• Climeworks operates the world's largest direct air capture facility (Mammoth, 36,000 tCO2/yr) in Iceland with geological storage via Carbfix
• Heirloom Carbon uses limestone-based DAC at lower energy cost, with contracts from Microsoft and the U.S. DOE
• Charm Industrial converts biomass to bio-oil and injects it underground, delivering thousands of tons of permanent removal
• UNDO deploys enhanced rock weathering across the UK and Australia at scale
• Carbofex produces high-permanence biochar in Finland with European Biochar Certificate verification

Buyers and Intermediaries

• Frontier (Stripe, Alphabet, Meta, Shopify, McKinsey) facilitates $1 billion+ in advance purchase commitments for permanent CDR
• Microsoft is the largest single corporate buyer of carbon removal, targeting carbon negative by 2030
• South Pole and Pachama provide offset brokerage with satellite-based monitoring for forestry projects
• Isometric provides independent scientific verification for CDR credits

FAQ

Q: Can carbon offsets count toward a net-zero target? A: Under SBTi's Corporate Net-Zero Standard, offsets cannot substitute for direct emission reductions. Companies must reduce value chain emissions by at least 90% (or 95% for some sectors). Only carbon removals can neutralize the remaining 5 to 10% of residual emissions. Offsets can be used for "Beyond Value Chain Mitigation" but do not count toward the net-zero claim itself.

Q: Why are carbon removals so much more expensive than offsets? A: Offsets avoid emissions at existing project sites with minimal technology cost, while removals must physically capture CO2 from the atmosphere (where it exists at just 425 parts per million) and store it permanently. DAC requires significant energy input, engineered infrastructure, and geological storage. Costs are expected to decline 50 to 80% over the next decade as the industry scales, following learning curves similar to solar panels.

Q: Are nature-based offsets always low quality? A: No. Well-designed forestry, mangrove, and soil projects deliver genuine climate and biodiversity benefits. The quality issues stem from baseline inflation (overstating what deforestation would have occurred), impermanence (forests burning or being logged later), and leakage (deforestation shifting elsewhere). Buyers should look for conservative baselines, buffer pools for reversal risk, and satellite monitoring. Gold Standard and updated Verra methodologies have strengthened requirements.

Q: What is the best entry point for a company new to carbon credit procurement? A: Start by purchasing a small portfolio of high-quality offsets from Gold Standard or Verra-certified projects with strong co-benefits (community cookstoves, methane capture). Simultaneously make an advance purchase commitment for carbon removal through Frontier or directly from a CDR provider. Even allocating 10 to 20% of your carbon budget to removal signals credible intent and funds the innovation pipeline.

Q: How do I verify that a carbon removal credit is legitimate? A: Look for third-party verification from registries like Puro.earth or independent scientific reviewers like Isometric. Confirm the measurement, reporting, and verification (MRV) methodology measures actual CO2 captured and stored, not modeled estimates. For DAC, verify energy source and storage permanence. For biochar and enhanced weathering, check production parameters and field deployment data. Request project-level documentation rather than relying solely on registry listing.

Sources

• West, T.A.P. et al. (2023). "Action needed to make carbon offsets from forest conservation work for climate change mitigation." Science, 381(6660).
• Frontier Climate. (2025). "Lessons from purchasing 300,000+ tonnes of carbon removal." https://frontierclimate.com/writing/lessons-learned
• Climeworks. (2025). "Mammoth: Our newest direct air capture and storage plant." https://climeworks.com/plant-mammoth
• SBTi. (2024). "Corporate Net-Zero Standard Version 2.0." https://sciencebasedtargets.org/net-zero
• University of Oxford. (2024). "The Oxford Principles for Net Zero Aligned Carbon Offsetting." Smith School of Enterprise and the Environment.
• Microsoft. (2024). "2024 Environmental Sustainability Report." https://www.microsoft.com/en-us/corporate-responsibility/sustainability
• Puro.earth. (2025). "Carbon Removal Marketplace and Registry." https://puro.earth
• VCMI. (2024). "Claims Code of Practice." Voluntary Carbon Markets Integrity Initiative. https://vcmintegrity.org