What you're really paying for when you check in
A hotel night looks simple on the receipt: room rate, tax, maybe a resort fee that nobody enjoys. The carbon footprint is messier. It's the gas heating your shower water, the diesel that drove your towels to the laundry, the long-haul flight that brought your breakfast avocado, the air-conditioning humming in 200 empty rooms next to yours. Nobody itemises this on checkout, but if we did, the picture of what makes a hotel "green" — and what's just paint — would get a lot clearer. Here's an honest breakdown of where the emissions actually come from on a single hotel night, and what to look for if you want a stay that earns the label.
The rough size of a hotel night
The Cornell Hotel Sustainability Benchmarking study, which is the most widely cited data set in the industry, puts the average carbon footprint of a hotel room night somewhere in the region of 20 to 30 kg of CO₂ equivalent — though the spread is enormous. A small, naturally ventilated guesthouse in a temperate climate can come in under 10 kg. A luxury resort in a hot, humid place with private pools, four restaurants and a spa can blow past 100 kg per occupied room night.
That spread is the whole story. The brand on the door tells you very little. The building, the climate, the energy mix and the operating style tell you almost everything.
Energy: the biggest slice by far
For most hotels, energy use accounts for the majority of operational emissions. Inside that, two things dominate.
Heating, cooling and ventilation. Climate control is the single largest line item on a hotel's energy bill in almost every market. Big lobbies with revolving doors, corridors kept at a constant temperature whether or not anyone is in them, and floor-to-ceiling glass that bleeds heat in winter and traps it in summer — these are architectural decisions that lock in emissions for decades. A hotel in a hot climate that runs aggressive air-conditioning to a chilly default temperature is, quietly, one of the highest-emitting buildings on the street.
Hot water. Showers, baths, laundry, kitchens and pools all want hot water, and most hotels still heat that water with gas. A long shower at a hotel can easily use more energy than the lighting in your room for the entire stay. This is why low-flow showerheads aren't a token gesture — they're one of the few guest-facing measures that actually moves the number.
Lighting, lifts, kitchen equipment and IT systems make up the rest. LED retrofits and key-card power switches help, but they're modest compared with the cost of cooling a building you've over-glazed.
Food and beverage: smaller than you think, dirtier than you'd hope
Food usually accounts for a smaller share of a hotel's footprint than energy, but per kilogram it's the most carbon-intensive thing on the property. A buffet breakfast is the classic offender: it has to be fully stocked at 7 a.m. and at 10 a.m., regardless of how many guests show up, and a meaningful share of what's laid out gets thrown away. The UN Environment Programme's food waste reports consistently flag hospitality as one of the worst-performing sectors for waste per cover.
Then there's what's on the plates. Beef and lamb carry a footprint several times higher than chicken, which is several times higher than pulses or vegetables. A hotel that serves a steak-heavy menu with imported seafood and out-of-season fruit will emit far more from its kitchens than one with a shorter, more seasonal card — even if both buy from the same suppliers.
Bottled water deserves its own footnote. Glass bottles trucked in and out of a property, when the tap water is perfectly safe, is one of the easiest wins a hotel can make and one of the slowest to actually happen.
Laundry, cleaning and the housekeeping problem
Sheets and towels are not free. Industrial laundry uses hot water, detergent and a lot of electricity for tumble dryers. Multiply that across hundreds of rooms turned over daily, and laundry alone can account for a noticeable slice of a hotel's emissions.
This is why those little cards asking you to reuse your towel are not, as the cynics insist, purely a cost-saving trick dressed up as virtue. They are a cost-saving trick that also happens to reduce emissions. Both things are true. A hotel that defaults to changing linens every two or three days unless you ask otherwise is doing something genuinely useful — and if it's also using cold-wash programmes and concentrated, biodegradable detergents, even better.
Construction, refurbishment and the embodied carbon nobody talks about
Every figure above is operational — the emissions from running the building. There's another category, embodied carbon, which is the footprint of the concrete, steel, glass, marble and furniture that went into building the place. For a new-build hotel, embodied emissions can equal decades of operational emissions. For a heritage building converted into a hotel, they're already paid.
This is the awkward truth behind a lot of glossy "eco-resort" launches: a brand-new sustainable building, fitted with the latest low-energy kit, often emits more in its first decade than a well-run old hotel down the road that simply refurbished what it had. The greenest hotel is frequently the one that already exists.
What the labels actually tell you
Certifications are useful when you read them carefully and useless when you don't. A few worth recognising:
- Green Key and EarthCheck assess operational practices — energy, water, waste, sourcing — across thousands of properties globally.
- LEED and BREEAM rate buildings, not operations. A LEED-certified hotel might still serve airfreighted strawberries in January.
- B Corp certification covers the company, not the room. It signals governance and overall practice, not the specific footprint of your night.
- Hotel Sustainability Basics, run by the World Travel & Tourism Council, is a foundational checklist rather than a high bar — useful for filtering out the laggards but not for picking the leaders.
The presence of a label doesn't end the question. The honest move is to glance at what the property actually publishes: an energy-intensity figure, a renewable-electricity percentage, a food-waste programme, anything with a number attached. Hotels doing the work tend to talk about it in specifics. Hotels greenwashing tend to talk about it in adjectives.
How to spot a credibly green hotel without falling for the leaves on the bathroom door
You don't need to read engineering reports. A few signals do most of the work.
- The building, not the brochure. Older buildings with thick walls, operable windows and shaded outdoor space are often quietly efficient. Glass towers in tropical climates rarely are.
- Climate control you can control. Rooms that let you switch off the AC, open a window, and set your own temperature use less energy than rooms locked at a corporate default.
- Honest food. A short, seasonal menu with named local suppliers is a better indicator than a buffet groaning under imported produce, regardless of how many bamboo straws are on display.
- Linen and towel policy that defaults to less. Opt-in changes rather than opt-out.
- No single-use plastic theatre. Refillable amenities in the bathroom, glass carafes, filtered tap water on offer.
- Published numbers. If a hotel reports its energy or carbon intensity per room night, even roughly, it's almost certainly tracking it. Most properties that don't measure don't manage.
- Transparent offsetting. Beware properties claiming to be "carbon neutral" purely on the back of cheap, untracked offsets. Reductions first, offsets for what's left, and offsets that are verifiable.
The flight is still the elephant
One last bit of honesty. For most leisure trips, the carbon footprint of getting to the hotel dwarfs the footprint of staying in it. A return long-haul flight in economy can produce more CO₂ than a fortnight in even an inefficient resort. This isn't an excuse to stop caring about hotels — operational emissions are within the industry's control in a way that aviation, for now, isn't — but it is a reason to weight your choices accordingly: stay longer, fly less often, and when you do book a hotel, make the room you're sleeping in count.
Where IMPT fits in
This is the work IMPT.io tries to do behind the scenes. Every booking made through the platform — across more than 1.7 million hotels in 195 countries — has one tonne of CO₂ offset on-chain, paid from IMPT's own commission rather than added to your bill. It doesn't replace choosing a genuinely well-run hotel, and it doesn't pretend to. Use the breakdown above to pick a stay that's honestly trying; let IMPT handle the offset on top, with the receipt visible on-chain. The IMPT Card and Token extend the same logic to everyday shopping across our partner brands, so the climate maths keeps working when you're not on the road. Travel is going to keep happening. The least we can do is be honest about what it costs, and then actually pay it.