What it is
The Montreal Protocol dealt with ozone-depleting substances and, by most measures, worked. The Kigali Amendment extends it to hydrofluorocarbons, the HFCs that largely replaced them. HFCs do not deplete ozone, but many have very high global warming potential, so the amendment phases down their production and consumption.
It entered into force on 1 January 2019 and, as at December 2025, had been ratified by 172 parties. That breadth is the significant part for a contractor: this is not one region's regulation that can be waited out, it is a global schedule with different timetables rather than different destinations.
Different schedules, same direction
Obligations depend on which group a country falls into. Developed (non-Article 5) parties started earliest, with reductions measured against a 2011–2013 baseline and reaching an 80% cut by 2036. Developing (Article 5) parties are in two groups with later freezes and reductions reaching 80–85% by 2045–2047.
For a contractor, the practical effect is the same everywhere, only on a different clock: the refrigerants you are used to become progressively scarcer and more expensive, the equipment arriving on site increasingly uses alternatives, and recovery and reclamation become economically significant rather than merely responsible.
What it changes on the ground
Four practical consequences, in roughly the order businesses notice them.
- Price and availability. High-GWP refrigerants get more expensive and harder to source well before any deadline, because supply is constrained ahead of demand.
- New refrigerants on site. Lower-GWP alternatives frequently carry higher flammability classifications, which changes handling, storage, leak detection and sometimes equipment siting. This requires training rather than assumption.
- Recovery becomes valuable. Recovering and reclaiming refrigerant moves from an environmental obligation to a commercial one as virgin supply tightens.
- Records become evidence. Many jurisdictions already require records of charge, top-ups, recovery and leak checks. As the phase-down proceeds, these are increasingly what demonstrates compliance.
What a contractor should do now
Know what refrigerant is in every system you maintain, and how much. This sounds obvious and is frequently not recorded anywhere reliable, which makes both compliance and planning impossible.
Then: keep certifications current for the people handling it, invest in recovery equipment and the discipline to use it, train on the alternatives before they arrive rather than after, and talk to customers about equipment approaching end of life while there is time to plan rather than when a failure forces a decision.
Talk to customers before the price does
Building owners generally do not follow refrigerant regulation and will experience it as servicing costs rising for no reason they understand. That conversation goes much better in advance than in the middle of a breakdown.
The useful version is specific: here is the equipment you own, here is what is in it, here is what we expect to happen to the cost and availability of that refrigerant, and here are the options with rough timescales. A customer given that a year early plans a replacement; the same customer told during a failure feels ambushed.
Plan replacements before they are forced
Equipment approaching the end of its life on a refrigerant being phased down is a decision waiting to happen, and the worst time to make it is when the unit has already failed in the hottest week of the year.
A contractor who can produce a list of a client's equipment by refrigerant type and age is holding the raw material for a planned replacement programme. That is a better business than emergency replacement, for both sides, and it depends entirely on having kept the asset records.
The commercial opportunity in it
Regulation of this kind creates work. Equipment has to be replaced, systems have to be converted, leaks have to be found and fixed rather than topped up, and somebody has to be able to tell a building owner what they have and what it will cost them.
The contractors who benefit are the ones who can answer questions about a customer's estate immediately, because they have the records. The ones who cannot will be competing on price for the same work with a worse story.