Is it legal to mine Monero on a free electricity connection at work or in a rented room?

Mining Monero on a “free electricity” connection is not automatically legal: you need permission to use the electricity for mining, not just permission to plug in a device. At work, your employer’s rules matter; in a rented room, your lease and local law matter—even when electricity is included in your rent.

“Free” electricity still has conditions

Someone pays for that electricity. When you are allowed to use it without a separate charge, that usually comes with an expectation about what you will use it for.

Mining means making your computer do calculations to help secure Monero’s network and potentially earn XMR, its currency. It can keep your computer working hard for long periods. That is different from occasionally charging your phone or using a laptop to read email.

Depending on your location and the circumstances, unauthorized mining could lead to:

• A bill for extra electricity.
• A breach of your employment agreement or lease.
• Disciplinary action or a dispute with your landlord.
• In more serious cases, allegations involving electricity theft or unauthorized computer use.

Those outcomes are not automatic. The key questions are what you were allowed to do, what your agreements say, and what local law requires.

At work, ask before you start

Being allowed to charge your own laptop at work does not necessarily mean you can run mining software on it all day.

You may need approval covering several separate things:

• Electricity: Can you use workplace power for personal mining?
• The device: Do you own it, or has its owner expressly authorized mining?
• The network: Does company policy allow mining traffic?
• Software and security: Are mining programs or browser miners permitted?

Your manager’s casual approval may not be enough if they cannot authorize those uses. Ask the appropriate manager or IT team, and get written permission that describes what you plan to run and when.

Running a miner in a browser does not avoid these rules. It still uses processing power and electricity. Do not hide it, bypass security controls, or treat a lack of blocking as permission.

In a rented room, check the lease

“Bills included” is a payment arrangement, not necessarily permission for unlimited electricity use.

Read your lease and any house rules for fair-use limits, unusually high consumption, business activity, electrical equipment, or nuisance restrictions. Mining might also create heat and fan noise that affects your housemates.

If the agreement is unclear, ask your landlord specifically about mining. Describe the equipment, its approximate power use, and how many hours it would run. Written agreement can help prevent a later dispute, though it does not override local law or building safety rules.

A landlord cannot necessarily add charges or end your tenancy simply because they dislike mining. Their rights—and yours—depend on your agreement and local tenant protections. Seek local tenant advice if a dispute arises.

Permission does not remove safety risks

Even with approval, avoid overloaded outlets, damaged cables, and blocked ventilation. Do not run equipment continuously if it overheats or creates unsafe conditions.

Be wary of anyone claiming workplace power or included utilities make mining “risk-free profit.” You still face equipment wear, possible charges, and uncertain earnings.

The bottom line

Only mine when your electricity use, device use, and any network use are authorized. Check workplace policies or your lease first, get clear written permission where needed, and consult a local legal or tenant adviser if the rules are unclear.