Climeworks just announced they’ve hit $250 per tonne for direct air capture (DAC) at their newest Iceland facility. That’s down from $600/tonne in 2024. The cost curve is bending in the right direction, and every climate tech newsletter is celebrating the breakthrough.

Here’s the uncomfortable reality: at $250/tonne, DAC is still economically unviable for anything except voluntary carbon markets funded by companies with deep pockets and strong ESG commitments. We need to get below $100/tonne—preferably closer to $50—before this technology can actually scale to climate-relevant volumes.

Let’s look at why the costs dropped, where they need to go, and what it’ll take to get there.

What Changed

The cost reduction came from three main sources:

Energy efficiency improvements. The newest sorbent materials (solid amine-based systems) require 40% less heat energy to regenerate compared to 2023 technology. That’s a direct operating cost reduction since most DAC facilities run on geothermal or renewable energy where cost per MWh determines capture cost per tonne.

Modularization and manufacturing scale. Instead of building bespoke facilities, DAC companies are now deploying standardized 2,000-tonne/year modules. Manufacturing costs dropped 30% when production moved from one-off construction to serial production of identical units.

Site optimization. Locating facilities in Iceland, where geothermal power is $20/MWh and basalt formations allow permanent CO2 mineralization on-site, eliminates transportation and storage costs that plague other locations.

These are genuine engineering wins. The problem is they’re also mostly one-time gains. Getting from $250 to $100 per tonne requires different breakthroughs.

The Economics Don’t Work Yet

Current carbon pricing mechanisms:

• EU ETS (Emissions Trading System): €85/tonne ($140 AUD)
• California carbon allowances: $35 USD ($52 AUD)
• Australia’s Safeguard Mechanism credits (ACCUs): ~$35 AUD
• Voluntary corporate carbon offsets: $15-50 per tonne depending on project quality

Even the most expensive compliance market (EU ETS) prices carbon at nearly half what DAC currently costs. Companies can’t rationally choose $250 DAC credits over $140 compliance certificates unless they’re making a strategic bet on future regulations or seeking premium ESG positioning.

This matters because DAC needs to scale to billions of tonnes per year to make a dent in atmospheric CO2 concentrations. That only happens if the economics work without subsidy or if regulations mandate DAC specifically (which seems unlikely given cheaper abatement options exist).

Where Costs Need to Go

The IEA’s Net Zero scenario assumes DAC captures 85 million tonnes/year by 2030 and 980 million tonnes/year by 2050. At current costs ($250/tonne), that’s:

• 2030: $21 billion/year
• 2050: $245 billion/year

For context, the entire global voluntary carbon market is currently ~$2 billion/year. Even if it grows 10X, it can’t absorb the volumes needed at these prices.

For DAC to become economically self-sustaining, costs need to drop to where they’re competitive with industrial CO2 sources for carbon utilization applications (like synthetic fuel production, enhanced oil recovery, or chemical feedstocks). That requires getting below $100/tonne, ideally to $50-75/tonne.

What Would Get Us There

Better sorbents. Current materials require heating to 80-120°C to release captured CO2. New metal-organic framework (MOF) sorbents being developed at universities might regenerate at 40-60°C, halving energy requirements. But they’re years away from commercial deployment and durability isn’t proven.

Renewable energy costs. If geothermal or solar costs drop from $20/MWh to $10/MWh in certain locations, that’s a direct 15-20% reduction in DAC operating costs. This is plausible in places like Iceland, Chile’s Atacama Desert (solar), or East African Rift (geothermal).

CO2 utilization rather than storage. If captured CO2 can be sold as feedstock for synthetic fuels ($150-200/tonne) or chemical production, the net cost to remove it from the atmosphere drops significantly. But this requires building adjacent industries at scale, which is its own chicken-and-egg problem.

Policy support. The US Inflation Reduction Act provides $180/tonne tax credits for DAC with permanent storage. That makes $250/tonne DAC economically attractive for US-based projects. Similar policies elsewhere could accelerate deployment, driving costs down through learning curves. But politically, subsidizing $250/tonne carbon removal is a tough sell when prevention costs $50/tonne.

The Uncomfortable Question

Here’s what nobody wants to say loudly: is DAC the right place to focus climate technology investment?

$1 billion invested in DAC removes ~4 million tonnes of CO2 at current costs. The same $1 billion invested in:

• Solar deployment in coal-dependent regions: avoids 15-20 million tonnes/year
• Industrial process electrification: avoids 10-18 million tonnes/year
• Methane capture from agriculture and landfills: avoids 25-40 million tonnes CO2-equivalent/year

DAC is essential for the last 10-15% of emissions that are genuinely hard to abate (aviation, agriculture, cement). But treating it as a primary decarbonization strategy rather than a last-resort cleanup tool misallocates resources.

What’s Actually Happening

Despite the economics, DAC deployment is accelerating:

• Climeworks is building a 36,000 tonne/year facility in Iceland (operational 2026)
• Carbon Engineering (now owned by Occidental Petroleum) is building a 500,000 tonne/year plant in Texas (operational 2027)
• 1PointFive has $1.1 billion in funding for multiple DAC hubs across the US

Why the investment despite poor economics? Three reasons:

Future carbon prices. If compliance markets tighten and carbon prices hit $200-300/tonne by 2030 (as some scenarios project), today’s DAC investments become profitable. It’s a bet on policy trajectory.

Corporate ESG commitments. Microsoft, Stripe, Shopify, and others have committed to purchasing millions of tonnes of high-quality carbon removal. They’re willing to pay premium prices for permanent removal rather than cheap offsets of dubious quality. This creates a niche market that can sustain DAC deployment even if mass markets don’t materialize.

Technology learning curves. Every industry shows cost declines with cumulative deployment (solar: 90% cost reduction over 20 years, batteries: 97% over 30 years). DAC is early on that curve. Companies are betting that deploying today at $250/tonne drives the learning that gets to $100/tonne by 2030.

The 2030 Timeline

If costs continue dropping at recent rates (60% in 18 months), DAC could theoretically hit $100/tonne by late 2027. That would change the economics significantly, making it competitive with some industrial abatement options and opening larger voluntary markets.

But cost curves aren’t smooth. Solar took 15 years to drop from $6/watt to $0.50/watt, with long plateaus in between. DAC might hit a cost floor at $150-180/tonne where further reductions require breakthrough innovations rather than incremental engineering improvements.

The next 24 months will tell us which trajectory we’re on. If the Texas and Iceland facilities come online at projected costs and demonstrate reliable operation at scale, investment will accelerate. If they struggle with availability, energy efficiency, or sorbent degradation, the sector will hit a credibility wall that slows deployment for years.

What This Means

Direct air capture is no longer science fiction. It’s engineering and economics. The engineering is improving faster than most people expected. The economics are improving, but not fast enough to make DAC a mass-market climate solution without policy support or dramatically higher carbon prices.

For organizations thinking about carbon strategy: DAC credits are premium products suited for offsetting genuinely unavoidable emissions where you want permanent, verifiable removal. They’re not cost-effective for offsetting emissions you could prevent through energy efficiency or electrification.

For policymakers: DAC deserves continued R&D support and deployment incentives, but it shouldn’t crowd out investment in prevention. $1 billion in solar deployment avoids more emissions than $1 billion in DAC removes. Both matter, but the allocation ratio should reflect their relative cost-effectiveness.

For the climate tech sector: the $250/tonne milestone is worth celebrating. It’s also a reminder that revolutionary-sounding technologies still need to compete on cost with boring alternatives. The physics works. Now we need to make the economics work at climate-relevant scale.

That’s the next hurdle. And it’s a bigger one than most coverage acknowledges.