On 1 January 2020, the International Maritime Organization (IMO) introduced a global sulphur cap for marine fuels, reducing the limit to 0.50% from 3.50%. Widely referred to as IMO 2020, this has been one of the most significant regulatory shifts for the shipping industry in decades.
The regulation accelerated the transition to cleaner compliant fuels (including VLSFO) and alternative technical solutions. As a result, carriers faced higher operating costs and adjusted pricing structures to reflect the changing fuel component.
Crucially, IMO 2020 is primarily a public health measure rather than a direct climate policy tool: reducing sulphur oxides (SOx) helps lower health risks for coastal communities and along major shipping lanes.
A study referenced in IMO materials indicates that delaying the global sulphur cap from 2020 to 2025 could have resulted in more than 570,000 additional premature deaths over 2020–2025.