What a VPN Actually Does (and What It Costs)

VPN ads are everywhere. You’ve probably seen them shoved into the middle of YouTube videos, promising to keep hackers out of your bank account or unlock streaming libraries you didn’t know existed. Some of that marketing is overstated. But the underlying tool is genuinely useful and worth understanding before you decide whether to pay for one.

Here’s what’s actually happening when you switch on a VPN.

How a VPN works in plain terms

When you connect to the internet normally, your traffic leaves your device, passes through your internet service provider (ISP), and reaches whatever website or app you’re trying to use. Your ISP can see which sites you visit. The sites you visit can see your IP address, which gives away your rough location.

A VPN, short for Virtual Private Network, adds an extra layer of security. Your traffic is encrypted on your device, then routed through a server run by the VPN provider before going out to the wider internet. From the outside, it looks like your activity is coming from the VPN server, not you. Your ISP can still see that you’re connected to a VPN, but it can’t read what you’re doing.

The encryption is an important part. It’s what stops anyone snooping on the connection, a dodgy public Wi-Fi network, for example, from picking out your passwords or browsing history.

What people actually use them for

The reasons people sign up tend to fall into a few main groups.

• Privacy from ISPs and trackers. In the UK, ISPs are required to keep records of customer browsing for up to a year under the Investigatory Powers Act. Some users prefer their provider not to have that log in the first place.
• Public Wi-Fi safety. Coffee shop and hotel networks are notoriously easy to intercept. A VPN encrypts the connection so nobody on the same network can read it.
• Streaming and geo-restricted content. Netflix, BBC iPlayer, and other services show different libraries depending on where you appear to be connecting from. A VPN lets you switch the server location and access libraries from other countries. Streaming platforms try to block this, with mixed results.
• Working from abroad. Anyone travelling who needs to access banking, work tools, or services that are geo-blocked from outside the UK will sometimes need a UK-based connection.
• Avoiding price discrimination. Flight and hotel prices occasionally differ depending on which country you appear to be browsing from. Some people shop around with a VPN turned on.
• Torrenting. Whether or not the file is legal, users often want their ISP and the wider swarm not to see their real IP address.

Layer it

No single tool or rule prevents everything. Software protects you from the kinds of attacks where bad code or stolen credentials do the work. Awareness protects you from the kinds where someone is talking to you directly and trying to convince you to act against your own interests. You need both.

The good news is that the basics, a password manager, 2FA, decent backups, a VPN on public networks, and a habit of slowing down when something feels off, cover the overwhelming majority of what people actually face. The tools are mostly free or cheap. The habits are free.

What it costs

This is where people get tripped up. The headline prices look cheap, but they’re almost always tied to long contracts paid up front.

Roughly speaking, in the UK, a monthly rolling plan from a mainstream provider sits between about £8 and £13. That’s the most expensive way to pay. A one-year plan usually works out to around £4-£6 per month, billed as a lump sum. Two- or three-year plans, which the big providers push hardest, typically land between £2 and £4 per month, again paid up front, so you’re handing over £60 to £100 at signup.

Free VPNs exist, and a small number are reasonable, but most fund themselves by logging your activity, throttling your speed, or capping your data. A free VPN that you’ve never heard of is rarely free in any meaningful sense.

If you want to compare what’s currently on offer in the UK, you can sift through a budget vpn uk roundup to see what the actual monthly cost looks like once the inflated launch discounts are stripped out.

A few honest caveats

A VPN does not guarantee anonymity. The provider can still see your traffic; they’re now in the position your ISP used to be in. That’s why the choice of provider matters, and why no-logs claims should be backed by independent audits rather than marketing copy.

A VPN won’t stop you from getting phished or downloading malware. It encrypts the connection; it doesn’t vet what you do on it.

And speeds usually drop a bit. The traffic is travelling farther and being encrypted along the way, so a 5-15 per cent reduction is normal. Cheap or overloaded servers can be much worse.

Is it worth paying for?

For most casual users, a VPN is closer to a useful utility than a security essential. Handy on hotel Wi-Fi, useful for accessing UK services from abroad, decent for streaming. At £2-£4 per month on a multi-year plan, it’s not an expensive habit. Just don’t expect it to do everything the ads imply.