Does a VPN Slow Down Your Internet Speed?
Yes, a VPN slows your internet — but how much depends on the protocol, server distance, and server load. Modern VPNs with WireGuard lose 5–15% of speed on nearby servers. Older protocols and long-distance connections can cut speed by 40–60%. On a fast home connection, you'll rarely notice.
Why a VPN slows your connection
Three factors add latency and reduce throughput:
- Encryption overhead: Encrypting and decrypting every packet requires CPU cycles and adds processing time. WireGuard has minimal overhead; OpenVPN has more.
- Server distance: Your traffic takes a detour through a VPN server. A server 50 miles away adds ~5ms. A server on another continent adds 80–150ms.
- Server load: Overloaded VPN servers throttle speeds. Premium VPNs load-balance across large server pools.
Real-world speed test results (April 2026)
From a 760 Mbps base connection (1 Gbps line, typical overhead), tested on nearby servers:
On a 100 Mbps home connection, even a 20% speed reduction leaves you with 80 Mbps — more than enough for 4K streaming (which requires 25 Mbps).
- ExpressVPN (Lightway): 752 Mbps avg — 99% speed retention
- NordVPN (NordLynx): 698 Mbps — 92% retention
- Surfshark (WireGuard): 682 Mbps — 90% retention
- Mullvad (WireGuard): 660 Mbps — 87% retention
- ProtonVPN (WireGuard): 665 Mbps — 87% retention
- Astrill (OpenWeb): 685 Mbps — 90% retention (obfuscated)
How to maximize VPN speed
- Use WireGuard: Fastest protocol, lowest overhead. Most VPNs offer it — enable it in settings.
- Choose a nearby server: The closer the server, the lower the latency. Use auto-connect to find the fastest server.
- Use the nearest server location: A server 'near' in latency is not always the geographically nearest — use the ping data in your VPN app.
- Avoid free VPNs: Free VPN servers are overcrowded. Paid servers have more capacity.
- Change protocols if slow: Switch from OpenVPN to WireGuard. UDP is faster than TCP for OpenVPN.
- Close background apps: Other apps using bandwidth while VPN is active compound the slowdown.
When a VPN can actually speed up your connection
ISPs throttle bandwidth for specific services — streaming, P2P, gaming traffic is sometimes deliberately slowed. A VPN encrypts your traffic type so your ISP can't identify it for throttling. In these cases, a VPN can actually increase your effective speed for those services.
Frequently asked questions
Which VPN has the least speed impact?
ExpressVPN consistently delivers the highest speed retention — 99% on nearby servers in our testing. NordVPN and Surfshark are close behind. For raw speed on nearby servers, all three are excellent. On long-distance connections (US to Australia), differences narrow.
Will a VPN slow down streaming?
For nearby servers, the slowdown is imperceptible — 4K streaming needs 25 Mbps, and even a moderately fast VPN delivers 100+ Mbps. If you're streaming from a server in another country (e.g., watching BBC iPlayer from the US), higher latency is expected but buffering shouldn't be an issue on fast connections.
Does a VPN slow down gaming?
For online gaming, latency (ping) matters more than throughput. A nearby VPN server adds 5–20ms latency. If you're routing through a server in another country, latency increases significantly. For gaming, always use the nearest VPN server and WireGuard or IKEv2 protocol.