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By now, Internet access might feel like a resource that “should” be free. Like water and air, it’s part of the fabric of our world; the central tool for entertainment, media, communication, and work. An ever-increasing number of homes are equipped with Wi-Fi networks, allowing residents to connect. The wireless signals are often strong enough extend to neighboring homes, meaning that you might be able to “see” and utilize your neighbor’s Wi-Fi network if they do not secure or password-protect it. Tempting, since you then wouldn't have to pay a dime to an Internet Service Provider (ISP); the monthly fees can be high.

But is borrowing or stealing a neighbor’s Wi-Fi network (often called "piggybacking" or "pirating") legal? Should you do it, if you think you won’t be caught? And what can you do if you think someone else is stealing your Wi-Fi?

In This Article

Federal and State Laws About Piggybacking on Someone's Wi-Fi

There is no uniform federal law that explicitly allows or prohibits using a neighbor’s Wi-Fi in the United States, though the criminal Computer Fraud and Abuse Act comes somewhat close. It creates criminal penalties for anyone who “intentionally accesses a computer without authorization or exceeds authorized access.” Although it was first enacted in 1986, before Wi-Fi became prevalent, its broad prohibitions on access can be read to indicate that common Wi-Fi theft would be chargeable as a federal felony.

In the absence of recent or comprehensive federal legislation, many states have responded with legislation.

In California, for example, the 2020 Comprehensive Computer Data Access and Fraud Act (Penal Code § 502) criminalizes unauthorized access to "computer services," including Internet and email services. To be found guilty, you would need to have knowingly use Wi-Fi in California without the owner’s permission.

In Texas, Penal Code §33.02 makes it illegal to “knowingly access a computer, computer network, or computer system" without its owner's effective consent. Doing so is treated as a Class B misdemeanor by itself, punishable by up to 180 days in jail and a $2,000 fine. If, however someone were to access someone's Wi-Fi with ill intent, such as to defraud the person or steal information from their files, it would turn into a more serious crime, even a felony.

Michigan's "Fraudulent Access to Computers, Computer Systems, and Computer Networks" law (§ 752.795) also makes it illegal to access a computer system or network without authorization. And in Florida, § 815.06 similarly makes it a third-degree felony offense to access any computer system or computer network without authorization, with possible punishment of up to five years in prison and a $5,000 fine.

Do States Enforce Internet Access Laws Against Wi-Fi Piggybackers?

Whether such laws are actually enforced is another matter. Broadly speaking, law enforcement authorities ordinarily reserve their resources and energies for cases where unauthorized Wi-Fi users cause intentional harm, commit fraud, or take advantage of the connection for serious criminal activity.

The U.S. Department of Justice, in setting enforcement priorities for the relevant federal law, focuses on situations where actual harm or breaches of personal or national security are at issue.

And in New York, for example, where unauthorized use of a computer network is considered a Class A misdemeanor (N.Y. Penal Law § 156.05), the regulation is rarely enforced by police or prosecutors. They and most other states reserve their energies for cases where the person illegally accessing someone's Wi-Fi is actually doing intentional harm.

Nevertheless, there have been notable instances where prosecutors have enforced minor penalties against Wi-Fi thieves or "pirates.” One of the first such enforcement cases was in Illinois, where a man was charged with remotely a nonprofit agency's network from his parked car; he pleaded guilty and was fined $250 and sentenced to one year of court supervision. The state of Florida has also been known to arrest and charge people who steal others' Wi-Fi.

Overall, however, while there might be laws on the books in your state that make piggybacking on or pirating someone's Wi-Fi a crime, authorities rarely seem to police or enforce them.

ISP Terms of Service Could Create Friction With a Neighbor

In their service contract, ISP companies typically prohibit the sharing of Wi-Fi connections between different households. It’s not hard to imagine why: They are losing a paying customer if you are able to simple use your neighbor’s account for free.

Many ISPs also track the bandwidth usage by each household. If the company realizes that one particular household is using double what it should be, there could be ramifications for your neighbor, like extra fees over their data cap, penalty fees, or cessation of service. Indeed, your neighbor might receive a notice of the situation and eventually discover, or be told by an ISP that did some investigating, that you've been free-riding on their network.

Even if the ISP does not inform your neighbor that their household's usage is unusually high, your neighbor might experience a slowdown in service. If tech-savvy, the neighbor might even be able to detect what devices are utilizing their network. Beyond the potential ethical implications of this free-riding, this could create hostility with your neighbor. It’s unlike that you will be able to “play dumb” about your actions.

Or even if the two of you have come to an agreement about shared usage, the issue of trouble with the ISP could ruin it.

Beware of Data Security With Open Wi-Fi

If you find an open Wi-Fi network, be cautious. The data you transmit over the network might not be secure.

Through a technique sometimes called “sniffing,” unencrypted data passing over the airwaves can be snatched by third parties, even if you use "incognito" mode. This could include passwords, cookies, and other small bits of information. Any financial benefits of free Internet access would quickly disappear if, for example, your identity or bank information was stolen. Unsecured Wi-Fi networks are not safe avenues for much of your Internet activities.

What to Do If Your Wi-Fi Is Being Piggybacked Upon

On a home system, the simplest way to protect your Wi-Fi from outside access to to password-protect it. Also make sure your Wi-Fi router is set to the highest standard in encryption options, currently WPA3. Your router will also keep a log of who's using it, which you can access. And keep your eyes open for signs of trouble, such as a slow system (or your neighbor sitting on your front porch with a laptop).

See Nolo's articles on Mediating Neighbor Disputes for more on how to approach a neighbor about an uncomfortable situation.