Blog
Carbon Market
How to buy EUAs: Easy Step by Step Guide

How to buy EUAs: Easy Step by Step Guide

Homaio is a climate finance investing platform that allows individual investors to buy EUAs (European Union Allowances), seeking both financial returns and impact on carbon emissions reduction. This guide details how to invest in EUAs through Homaio, focusing on responsible investing and green finance. Get started with stock market investing for beginners.

We’ve been hearing about green finance a lot recently: impact investing has risen from US$420.91 billion in 2022 to US$495.82 billion last year according to the Impact Investing Global Market Report 2023

In this context, European Union Allowances (EUAs) are the trading unit of the EU Emissions Trading Scheme, the backbone of Europe’s climate strategy. Yet they were not accessible to individual investors in spite of being a huge, highly performing asset with a real impact on emissions and a demonstrated track record since 2005 (read more here).  Until now. 


We created Homaio to unlock this asset class for you. Homaio  is an investing platform focused on climate finance, empowering investors to seek both financial returns and proven impact on carbon emissions reduction. 

In this comprehensive guide, we'll delve into the step-by-step process of how to buy EUAs through Homaio.

Step 1: Sign up on Homaio's EU ETS platform

Here is the link to the app.

Gif showing the first steps on logigng in to the platform to buy EUAs.

Begin your climate investment process by registering on Homaio's platform. Homaio prioritizes your security and privacy, offering two options for account access:

Classic Login/Password:

  • Choose a traditional login/password combination for access for a straightforward login process.

Google Authentication:

  • Use your usual Google credentials instead. By doing so, experience a faster login process with a single sign-on. Google authentication provides an additional layer of account protection while still valuing your privacy.

As part of the registration process, Homaio also requests some basic information through a brief questionnaire:

  • Name: … No need to justify this one. 
  • Email: Ensure smooth communication and timely updates on your investments.
  • Country: Tailor the investment experience to local rules and your preferred language.
  • Phone Number: Needed as an additional security measure.

Gif showing how to input credentials to the platform to buy EUAs.

Step 2: Indicate the details of your carbon investment

Gif showing how to input the investment details to buy EUAs.

2.1 Investment Amount

Decide on the amount you want to invest in EUAs. By offering different options and entry level possibilities, Homaio wants to make sure that climate finance is within reach for all.

2.2 KYC Steps

For security and regulatory compliance, follow Homaio's Know Your Customer (KYC) procedures. This step ensures a transparent and secure investment environment. And… it is a legal requirement!

2.3 Subscription Contract Signature with Yousign

Formalize your investment through a digital signature using Yousign. We use this e-signature solution to make the process faster and more convenient for you.

Step 3: Buying Your Carbon Allowances

3.1 Monthly Batch System

Homaio has a monthly batch system - during the span of a month, we collect your orders and receive your investments. Then, we consolidate all the individual participations at the end of the subscription period and buy the corresponding EUA volumes. We buy physical (Spot) EUAs on either the Intercontinental Exchange or the European Energy Exchange. The allowances are then held on the EU Registry.

3.2 Track your investments

After buying the EUAs, Homaio grants investors access to a personalized portfolio tracker. This feature gives the opportunity to follow the investment value and observe the direct impact on reducing carbon emissions.

Gif showing how to track one's EUA investments

Investing in EUAs through Homaio is a commitment to positive environmental change through personal finance. Join today and become part of a community that believes in the power of responsible and impactful investing. Your journey towards financial growth and environmental impact starts here.

Share this article :

Learn more

Carbon Market

UKAs and EUAs: Why Hold Both When You're Already Invested in European Carbon

If you're already invested in European EUAs, do you need to bother with UK UKAs? Short answer: yes. Long answer: the two markets are correlated at around 80% over time, but that correlation hides distinct dynamics (political, industrial, calendar-based) that make UKAs both linked and differentiated from EUAs. That's precisely what makes the combination interesting: an EUA core for liquidity and depth, a UKA satellite for political catch-up and the associated risk premium. Here's why.

July 7, 2026

Carbon Market

What is the Climate Impact of a UKA? One Tonne of CO₂ Pulled Off the Market, Measured and Verifiable

Holding a UKA does something simple and radical: it takes one right-to-emit tonne of CO₂ off the UK market. Not an offset, not a voluntary credit, not a tree-planting promise. A regulated allowance, accounted for by the State, that exits the system the moment a non-compliance investor holds it. It's what we call an additional climate action: measurable, verifiable, legally framed. Here's how it works, and why this impact is one of the most robust in today's climate-finance landscape.

July 7, 2026

Carbon Market

The UKA-EUA Convergence Play: Anatomy of a Catch-Up in Motion

May 2025, London summit: Keir Starmer and Ursula von der Leyen formally state their intention to link the UK ETS to the European system. A new term has been circulating among carbon analysts ever since: the Convergence Play. The mechanic is simple: UKAs trade today around 20% below EUAs, a discount that has already partially closed since May 2025. The residual mechanical upside is around +20 to +25%. Here's how it works, why it's happening now, and what the Swiss-EU precedent teaches us.

July 7, 2026

What if your savings funded the climate transition?

Homaio is the first platform that allows you to invest in European (EUA) and British (UKA) carbon quotas.

Diversify: integrate climate assets into your portfolio.
Discover Homaio
Finally access investments that combine
financial
 and
environmental
 performance
The Guide to Climate Investing

Investing in the climate without sacrificing performance: an accessible guide to understanding it all.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Free guide
The guide to investing in UK carbon allowances

Understanding the UK carbon market and its potential for investors.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Free guide
Newsletter
The Homing Bird

5 minutes a week to become unbeatable on climate finance.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Simulate your return in 2 clicks

Discover the added value you could have achieved if you had invested in one of our assets 1, 5, or 10 years ago.

Chat with an expert

Need help or more information? Schedule an appointment with our expert, who will be delighted to assist you!