In 2026, capturing a ton of CO₂ directly from the atmosphere costs between $600 and $1,000. The same ton captured at the outlet of an industrial chimney costs $50–100. The gap is staggering. Yet investments in direct air capture (DAC) are booming, while point-source capture projects struggle to take off. Why? Because the carbon economy is not just about a simple unit cost. It depends on the purity of CO₂, its final destination, carbon credits, and above all, what is meant by "return on investment." Let's break it down.
Point Source vs. DAC: Two Technologies, Two Economic Realities
Point-source capture involves recovering CO₂ before it is emitted into the atmosphere, at fixed installations: power plants, cement plants, steel mills, refineries. The CO₂ concentration there is high (5 to 30%), making capture less energy-intensive and less costly. According to the comparative analysis published in ScienceDirect, post-combustion capture processes (amine, membranes, etc.) show mature and declining costs.
Conversely, DAC (Direct Air Capture) extracts CO₂ from ambient air, where its concentration is only 0.04%. It is the equivalent of looking for a needle in a gaseous haystack. The two main technologies – low-temperature (LT) DAC and high-temperature (HT) DAC – consume a lot of energy, which makes the process more expensive. Pubs ACS notes that HT DAC offers no economic advantage over point-source capture in the short term and remains less competitive than LT DAC in the long term.
Myth #1: "DAC is too expensive to be useful"
This judgment ignores a key point: DAC produces very high purity CO₂, directly usable for synthetic fuels or high-value-added materials. A "custom-made" CO₂, so to speak. Point-source capture often provides a less pure gas, requiring additional purification steps. According to Frontiers in Climate, CO₂ quality strongly influences the viability of downstream uses, especially for fuel synthesis.
Moreover, DAC can be deployed anywhere, even far from industrial areas. It is not dependent on a fixed source. This opens up possibilities for capture hubs located near geological storage sites or pipelines. IEA highlights that the falling costs of renewable energy (solar has dropped 30% in two years) improve the economic balance of DAC, which is very demanding of low-carbon electricity.
Myth #2: "Point-source capture has an obvious return on investment"
Not so simple. A study published in PLOS Climate calculates the "biophysical return on investment" (B-ROI) of point-source capture: it is negative. Why? Because this capture does not remove CO₂ already present in the atmosphere; it only prevents new emissions. In other words, it reduces the flow but does not decrease the stock. To achieve carbon neutrality, historical CO₂ must also be removed. DAC can contribute directly, provided it is powered by decarbonized energy. Otherwise, its B-ROI also becomes negative, as the same study reminds us.
The Global CCUS Market: Billions at Stake
According to the IDTechEx report on CCUS markets 2026-2026, the sector is experiencing double-digit annual growth. The report distinguishes three main outlets: geological storage, emerging use (synthetic fuels, construction materials, green chemistry), and enhanced oil recovery (EOR). Each pathway has its own profitability.
- Geological storage: remunerated by carbon credits, but depends on infrastructure and regulation.
- Emerging use: valorizes CO₂ as a raw material. Margins are low today, but R&D promises breakthroughs.
- EOR: economically viable thanks to the extracted oil, but controversial because it prolongs the fossil fuel era.
The table below summarizes typical costs and returns for each pathway (data from IDTechEx and AssessCCUS):
| Technology | Capture Cost (€/tCO₂) | CO₂ Purity | ROI (carbon credits + valorization) | Maturity |
|------------|-----------------------|------------|--------------------------------------|----------|
| Point-source capture (post-combustion) | 40–90 | Medium to high | Moderate (especially if storage or EOR) | Commercial |
| Low-temperature DAC | 250–600 | Very high | Low to medium (depends on carbon credit price) | Demonstration |
| High-temperature DAC | 500–1,000 | Very high | Low (without subsidies) | Prototype |
Innovation Driving Down Costs
Recent advances could change the game. Engineers have designed an "artificial leaf" capable of capturing CO₂ from air and industrial flue gases, then releasing it for conversion into fuel, as reported in a Reddit post (source: Reddit, 2026). This type of device could drastically reduce DAC costs by eliminating costly thermal cycles.
Furthermore, the glossary of the AssessCCUS project reminds us that capture cost includes compression, transport, and storage – items often underestimated. A complete analysis must therefore integrate the entire value chain.
What Strategy for Companies and Investors?
No technology wins alone. Combining both approaches seems most promising:
- Point-source capture for large industrial emitters, with low immediate cost and rapid impact on emissions.
- DAC to treat diffuse emissions (transport, agriculture) and reduce the atmospheric stock, driven by high-quality carbon credits.
By 2026-2026, falling DAC costs (expected by IDTechEx) and rising carbon prices (via regulated markets) could make DAC competitive for high-value niches. Companies must therefore prepare to invest in both pathways, depending on their sector and carbon exposure.
Conclusion
The economics of CO₂ capture is not just about cost per ton. It depends on purity, end use, subsidies, and carbon price. Point-source capture remains cheaper and mature, but it is only a crutch: it does not remove already emitted CO₂. DAC, despite its high cost, offers geographic flexibility and unmatched purity, essential for certain uses and for long-term carbon neutrality. The two are complementary, and their combined deployment is the only realistic path to achieving climate goals.
Further Reading
- IDTechEx - Carbon Capture, Utilization, and Storage (CCUS) Markets 2026-2026 - Detailed CCUS market forecasts over 10 years.
- ScienceDirect - Carbon capture and storage: An evidence-based review - Comparative analysis of capture processes.
- Reddit - Engineers have built a cost-effective artificial leaf that can capture carbon dioxide - Innovation on an artificial leaf.
- PLOS Climate - Carbon dioxide removal–What's worth doing? - Biophysical return on investment of capture.
- Frontiers in Climate - Scaling CO2 Capture With Downstream Flow CO2 - Value chain analysis of captured CO₂.
- Pubs ACS - Cost-Effective Locations for Producing Fuels and Chemicals from CO2 - Comparison of DAC vs. point-source capture for fuel production.
- AssessCCUS - Glossaries - Definitions of capture costs.
- IEA - World Energy Investment 2026 - Trends in clean energy investments.