Online Casinos and the Environment: Where the Energy Goes and How to Judge Green Claims

Published on April 23, 2026 | Updated: 4 October 2026 | 9 min read | By the smartpari.org editorial team

“Sustainable gambling” can mean two different things: the environmental footprint of online casinos, and gambling in a way that does not harm you. This article covers both, with the emphasis on the first: where the energy actually goes when you play online, what can and cannot be known from outside a company, and what an environmental claim has to contain before it means anything.

In short: an RNG spin is a very light operation, live video is the heavier part, and proof-of-work crypto payments can be the most energy-intensive step per transaction. A credible green claim comes with measured figures, a method and independent checking, not just a leaf icon.

Where an online casino’s energy use comes from

Data centres and cloud hosting

Game servers, player accounts, payment processing, fraud checks and the website itself run in data centres, usually rented from hosting or cloud providers. The electricity goes to the servers and to the cooling that keeps them running. One player’s share is small, because the same hardware serves many users, but it runs 24 hours a day.

RNG games: small requests

When you spin an RNG slot, your device sends a short request, the server draws a random number, calculates the result and returns a small response. The animation is rendered on your own device. In energy terms, one spin is a tiny amount of computing. What happens on the server in that moment is explained in how a casino random number generator works.

Live-dealer studios

Live tables are physical places: studio lighting, several cameras per table, video encoders, monitors, card shoes or automatic roulette wheels, and air conditioning for staff and equipment. Many tables run around the clock in shifts. The technical side is described in how a live casino studio actually works.

Video delivery

Every live player receives a continuous video stream, delivered through content delivery networks (CDNs) and the internet to a home or mobile connection. Per player and per hour, a video stream moves far more data than RNG play, which is why live games are generally the heavier part of online gambling per player. The energy behind that data transfer depends on the network, device and resolution and is debated among researchers, so treat any single “CO₂ per hour of streaming” figure with caution. Lowering the stream quality when HD adds nothing reduces it.

Players’ own devices

Phones, tablets, laptops, TVs and home routers also use electricity. This is outside the operator’s control, but it belongs to the full picture.

Payments, especially crypto

Card and bank payments run on existing financial infrastructure, with a modest energy cost per transaction. Cryptocurrencies differ by design. Proof-of-work blockchains such as Bitcoin secure the network through mining, which consumes a large amount of electricity in total; per-transaction figures are only rough averages, but they are high compared with conventional payments. Ethereum switched to proof-of-stake in September 2022 (an event known as “the Merge”), which cut its energy use by more than 99%. Other proof-of-stake networks, and the stablecoins issued on them, are similarly light. Fees, payout times and risks are covered in our guide to crypto casinos.

The table is a qualitative comparison, not a measurement.

What cannot be estimated from outside

Without published data, nobody outside a company can calculate a specific casino’s footprint. It depends on where its servers are hosted and what electricity those data centres use, which live-casino providers supply its tables and where their studios are located, how many players it has and how they play, and which payment methods they choose. Online calculators that give a precise number for “an online casino” rely on generic assumptions. When we checked on 4 October 2026, the SmartPari operator’s own site (smartpari.com) showed only a password prompt (HTTP 401) on every page, so no sustainability, energy or emissions information could be read there, and we found none published elsewhere.

What a credible green claim needs

Words such as “eco-friendly” or “carbon-neutral play” are easy to write. A claim you can evaluate usually rests on the following elements.

Scope 1, 2 and 3 emissions

The GHG Protocol, the most widely used standard for corporate greenhouse-gas accounting, splits emissions into three scopes:

• Scope 1 – direct emissions from sources the company owns or controls, such as backup generators or company vehicles.
• Scope 2 – emissions from purchased electricity, heat and cooling, for example for offices, owned studios or owned servers.
• Scope 3 – all other emissions in the value chain: rented hosting, live-casino suppliers, marketing, business travel and the use of its services.

For a largely digital business that rents its infrastructure and buys games from suppliers, Scope 3 is often where most of the footprint sits. A report that covers only Scopes 1 and 2 can look impressively small while leaving out the main part.

Absolute figures and a base year

A target such as “minus 50% by 2030” means little without a base year and an absolute starting figure in tonnes of CO₂-equivalent. Intensity figures (per employee or per euro of revenue) can fall while total emissions rise.

Location-based and market-based electricity

Scope 2 can be reported in two ways. The location-based method uses the average emissions of the grid where the electricity is consumed; the market-based method reflects the contracts the company has bought, such as green tariffs or certificates. The GHG Protocol asks companies to report both. A large gap between the two is normal, but it should be visible.

Certificates versus actual supply

Renewable energy certificates, such as Guarantees of Origin in Europe, show that a certain amount of renewable electricity was produced somewhere. Buying them is not the same as running a data centre on its own solar panels or signing a long-term power purchase agreement that finances new capacity. Each instrument has its place, but a claim should say which one it relies on.

Reductions versus offsets

Cutting emissions – more efficient hosting, lower-consumption studio equipment, less travel – is different from buying carbon credits to compensate for them. Offset quality varies widely.

Independent assurance

Figures checked by an independent auditor or verification body, with the level of assurance stated (limited or reasonable), carry more weight than self-declared numbers.

The EU rules on green claims

In the EU, Directive (EU) 2024/825 on empowering consumers for the green transition amends the rules on unfair commercial practices, and its provisions apply from 27 September 2026. Among other things, it prohibits generic environmental claims such as “green” or “eco-friendly” when the trader cannot demonstrate recognised excellent environmental performance, and claims that a product has a neutral, reduced or positive impact on the climate based on the offsetting of emissions. It also restricts sustainability labels not based on a certification scheme or set up by public authorities.

Separately, the Corporate Sustainability Reporting Directive (CSRD) requires certain large companies to publish sustainability information according to European reporting standards. Its scope and timetable have been revised as part of EU simplification efforts, so many companies are not covered. No report does not prove anything is hidden, but it leaves nothing to verify.

Red flags in green claims

• Vague words (“eco”, “green”, “sustainable”) with no figures behind them.
• “Carbon-neutral” or “climate-positive” claims based on offsets, with no data on reductions.
• Percentages only, without a base year or absolute tonnes.
• Only Scope 1 and 2 reported by a business whose footprint is mostly hosting and suppliers.
• “100% renewable” without saying whether this means certificates or actual supply.
• Self-designed badges with no named certification scheme, and no independent assurance.
• Future targets presented as if already achieved.

The social side: responsible gambling

For gambling companies, the social part of sustainability is mostly about preventing harm to players. For you, sustainable gambling means playing in a way you can keep up without damage. On average, gambling costs money, so treat it as paid entertainment with a fixed budget. Deposit limits, reality checks (reminders of how long you have been playing), time-outs and self-exclusion exist for this purpose, and in many jurisdictions licensed operators are required to offer them. Our article on bankroll management explains how to set a budget and stake size, and you can check a casino’s licence on our licence verification page. If gambling stops being fun, free and confidential support is available from organisations such as GamCare in the UK (0808 8020 133) and from national helplines in other countries.

Questions About Online Casinos and the Environment

Do online casinos have a large carbon footprint?

Per player, RNG games such as slots are light, because each spin is a tiny server request. Live-dealer games are heavier because of the studios and the continuous video stream, and payments on proof-of-work blockchains are energy-intensive per transaction. The footprint of a specific casino cannot be estimated without data published by the company.

Is a live dealer game worse for the environment than a slot?

Generally yes, per hour of play. A live table needs a lit, air-conditioned studio with cameras and encoders, and every player receives a continuous video stream. An RNG slot only exchanges small amounts of data with the server.

What does a “carbon-neutral casino” claim mean?

Usually that the company has bought carbon credits to offset some of its emissions, not that it produces none. In the EU, from 27 September 2026, claims that a product has a neutral or reduced climate impact based on offsetting are prohibited under Directive (EU) 2024/825. Look for absolute emission figures, scopes, a base year and independent assurance instead.

Does SmartPari publish sustainability information?

We could not find any. When we checked on 4 October 2026, the SmartPari operator’s own site (smartpari.com) showed only a password prompt (HTTP 401) on every page, so no sustainability, energy or emissions information could be read there, and we found none published elsewhere. A credible report would include Scope 1, 2 and 3 figures, a base year and independent assurance.