CAEs: the money hotels are leaving on the table for energy retrofits

JSBy Joan SanzCurated by Joan Sanz. · July 20, 2026 · Follow on LinkedIn

Voice reading · ~1 min

Energy Savings Certificates (CAEs) could become the fuel for hotel retrofits, but most properties haven't even heard of them yet. The idea: a hotel invests in efficiency (insulation, HVAC, LED lighting) and then sells the verified energy savings to large utilities that need to cut their own footprint. Result: renovations that pay for themselves or even turn a profit.

According to the original report from 10 Minutes News, the framework is already live in Spain, but lack of awareness is holding it back. The funny thing: it doesn't require endless paperwork. A certified auditor measures the savings, the CAE is issued, and it's sold on the regulated market.

My take: this isn't another subsidy with red tape. It's a financial instrument that rewards real efficiency. For a mid-size hotel, a facade overhaul or boiler replacement can self-fund in two or three years thanks to these certificates. The early movers will win on both margins and green credentials. So who's going to make the first move?

Quick questions

What is a CAE and how does it work for hotels?

A CAE is a certificate that proves energy savings from a retrofit. The hotel sells it to large utilities, which use it to meet efficiency targets. The renovation pays for itself.

Which retrofits are eligible for CAEs?

Thermal insulation, efficient windows, HVAC, LED lighting, high-efficiency boilers, or solar systems. Any measure that cuts final energy consumption qualifies.

How much money can a hotel get from CAEs?

It depends on the savings. Cutting 100 MWh per year can yield thousands of euros when you sell the certificate. The bigger the improvement, the larger the income.

Do I need an energy auditor to apply for CAEs?

Yes, a certified auditor must measure savings before and after the work. They certify the real savings, which become the CAE you can sell.

Where are CAEs sold and who buys them?

They trade on the regulated CAE market (Ministry platform). Buyers are large electricity or gas utilities that need the certificates to meet their own savings goals.

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