The cost is steadily dropping (see this from 2018): https://www.science.org/content/article/cost-plunges-capturing-carbon-dioxide-air https://www.science.org/c

The cost is steadily dropping (see this from 2018): https://www.science.org/content/article/cost-plunges-capturing-carbon-dioxide-air https://www.science.org/content/article/cost-plunges-capturi... If someone asked me for a current cost calculation for a large-scale facility producing methane or methanol, off the top of my head I imagine it's still 5-10X as expensive as mined fossil fuels are. Economies of scale might bring that down to parity fairly soon, however.