Cracking the code on SMAP: Turn maritime carbon rules into real value

Europe’s carbon and energy rules are rapidly evolving. The European Commission introduced its proposal to revise the EU Emissions Trading System (ETS) framework for 2031 to 2040 on 17 July 2026. Shipping is now inside the EU ETS; & the new SMAP (Sustainable Maritime Alternative Propulsion) mechanism is closing the price gap between conventional marine fuel and cleaner alternatives, whereas biomethane is becoming a serious compliance tool, not just a niche fuel.

This isn’t anymore a “set it and forget it” market for shipowners, industrial buyers, and biomethane producers. It takes real market access and actual understanding of how the pieces fit together. Additionally, European Shipowners (ECSA) and the World Shipping Council have both backed the SMAP mechanism direction, framing it as a first step toward reinvesting shipping’s own ETS contributions back into the sector’s fuel transition. That’s the space Aither is fortifying.

New carbon math of shipping

Shipowners are juggling two problems at once: managing their carbon allowance obligations and sourcing compliant low-carbon fuel. As shipping is now subject to the EU ETS, up to 110 million allowances worth an estimated EUR 10 billion are set aside under SMAP to help bridge the cost gap for fuels such as bio-LNG, biomethane, advanced biofuels, and RFNBOs or low-carbon hydrogen.

Here’s where Aither fits in: 

• Getting allowances without the friction: Aither trades EU Allowances directly, offering shipowners hedging options, quick delivery, and clean settlement.

• Stacking compliance value: Instead of treating EU ETS and FuelEU Maritime as separate compliances, Aither’s desk helps clients combine allowance management with FuelEU surplus trading to bring down total operating cost. SMAP creates a new allowance stream that stacks on top of existing FuelEU Maritime compliance trading rather than replacing it. 

• Less paperwork, more visibility: as EU reporting requirements evolve, Aither helps fleet operators keep their emissions and compliance data aligned, making the process simpler and reducing the need to reconcile figures manually.

Biomethane and alternative fuels under the ETS revision 

Biomethane and alternative fuel suppliers for shipping now have a concrete funding source backed by dedicated allowance numbers under SMAP. The zero rating under the ETS on RED-certified biomethane and the expanded scope of the Modernisation Fund toward industrial decarbonisation provide useful levers for cutting emissions and reducing the number of allowances a company has to surrender.

Aither’s approach for this market shift: 

• Connecting suppliers and off-takers: Connecting biomethane and Bio-LNG producers directly with industrial buyers and maritime off-takers, handling & financing narrative structuring alongside compliance positioning.

• Structuring off-take deals: Structuring off-take deals to align long-term fuel availability with evolving ETS compliance rules.

• Moving volumes across EU member states: Moving volumes using established registry connections and its own balance sheet, rather than leaning on third-party capital.

Aither’s pitch comes down to four things that matter to counterparties: 

• Independent capital: Faster settlement, custom deal structures, no waiting on third-party funding.

• Cross-market expertise: One desk handling several carbon allowances/credits/certificates (ETS1, ETS2, CBAM) and renewable gas certificates.

• Operational precision: Accurate pricing and direct registry transfers, so compliance risk doesn’t slip through the cracks.

• Flexible deal structures: Everything from a one-off spot trade to multi-year fixed-price off-take agreements.

The Bottom Line 

As EU carbon rules tighten and national auction revenues get increasingly channeled into shipping decarbonisation and clean energy priorities, companies need a partner who can handle both the carbon liability side and the physical fuel/certificate side. That combination of EU ETS knowledge and active trading in biomethane and maritime fuels is where Aither has its edge.