Does a VPN Slow Down Your Internet?

"Will it slow me down?" is the most common question before buying a VPN. Short answer: a bit, and less than you'd think if it's set up right. Here's why, how to measure it, and how to fix it.

Why a VPN slows your connection

1. Distance. Your traffic goes to the VPN server first, then to the site. Connecting from London to a server in Sydney adds a long round trip. This is the biggest factor by far.
2. Encryption overhead. Every packet is encrypted and wrapped, which adds a little data and some processing. Modern phones and laptops handle this easily; old routers and cheap devices may not.
3. Protocol. Different VPN protocols have different overhead. WireGuard is lean by design, and its developers publish benchmarks showing higher throughput and lower latency than older options (WireGuard performance). Those benchmarks come from the WireGuard project itself.
4. Server load. A crowded server is slow regardless of distance.
5. Your own network. If your Wi-Fi is slow, the VPN can't fix it. It just adds a step.
6. TCP vs UDP. VPNs over TCP (used to get past strict firewalls) are slower than UDP.

How much speed you'll lose

There's no single number. It depends on all of the above. As a rule of thumb:

• Nearby server, WireGuard, good network: small loss you'll rarely notice in browsing, calls or HD video.
• Distant server: noticeable latency, which matters for gaming and video calls more than downloads.
• Busy server or TCP mode: bigger drops.

Measure your own: that's the only number that counts.

How to test VPN speed properly

1. Run a speed test with the VPN off. Note download, upload and ping.
2. Connect to the nearest VPN server. Run it again.
3. Connect to a distant server. Run it again.
4. Repeat at a different time of day.
5. Compare ping as well as download speed. Ping is what you feel in games and calls.

Can a VPN make your internet faster?

Sometimes. If your provider slows down certain kinds of traffic, a VPN hides what that traffic is. A Northeastern University-led study using the Wehe app analyzed over a million tests and found US wireless carriers routinely throttled video streaming services (Northeastern, paper). In that situation, a VPN can restore normal speeds for the throttled app.

A VPN can also help when your provider's routing to a particular site is poor, by taking a different path. These are exceptions; in most cases expect a small loss, not a gain.

7 ways to speed up a slow VPN

1. Pick the closest server. Or let the app choose the fastest one.
2. Switch to WireGuard. If it's not the default, change it in settings.
3. Use UDP, not TCP, unless a network blocks UDP.
4. Try another server in the same city. Load varies.
5. Use split tunneling to keep heavy, low-risk apps (game downloads, local streaming) off the VPN, and everything else on.
6. Move closer to the router or use a cable. Fix the Wi-Fi first.
7. Restart the app and update it. Old versions and stuck sessions cause slowdowns.

Speed by protocol

Mobile data vs Wi-Fi

On mobile data, speed changes constantly with signal strength, so VPN tests are noisy. Run several tests and compare averages. If your connection drops when moving between Wi-Fi and mobile data, try IKEv2, which is designed to handle network changes. On congested public Wi-Fi, the network is usually the bottleneck, and the VPN's share of the slowdown is small.

When speed matters most

• Gaming: use a nearby server or split-tunnel the game. Ping beats bandwidth.
• Video calls: nearby server, WireGuard, UDP.
• 4K streaming: pick a server close to you or in the service's country.
• Big downloads: split tunneling, or pause the VPN on trusted home networks.

Choosing a VPN for speed

Look for WireGuard support, servers close to where you live and travel, automatic fastest-server selection, and split tunneling. Buycat VPN picks the fastest location when you tap connect, supports WireGuard, IKEv2 and OpenVPN, and includes split tunneling on Plus and Pro. Test it on your own connection inside the 30-day money-back window.