A VPN can slow your connection slightly because it encrypts your data and routes it through an extra server. In practice, with a modern protocol and a nearby server, the drop is usually small and often unnoticeable — and in some cases a VPN can actually make a connection faster by stopping ISP throttling.
Why a VPN can add a little overhead
Two things cost a bit of speed: encryption (your data is scrambled and unscrambled) and rerouting (your traffic takes a detour through the VPN server). The further away the server and the older the protocol, the more noticeable this becomes.
What makes the difference small — or large
- Protocol. Older protocols are heavier. FortisVPN uses WireGuard, built for speed with low overhead.
- Server distance. A server in your own country or a neighbouring one is far faster than one across the world.
- Server load. Crowded servers slow down; switching to a less busy location helps.
- Your base connection. A VPN can't exceed the speed your ISP gives you to begin with.
When a VPN can make you faster
If your ISP throttles specific traffic — for example, slowing video streaming or downloads — it can only do that to traffic it can see. Because a VPN encrypts your activity, the ISP can no longer single it out, which can restore full speed. See does a VPN stop ISP throttling?
How to get the best speed from your VPN
Pick a server close to you, choose a less crowded location if one feels slow, keep the app updated, and use the fastest available protocol. FortisVPN's network spans 100+ countries with WireGuard powering low-latency connections for streaming and gaming. Try it free for 7 days.
Frequently asked questions
Q. How much slower is the internet with a VPN? With a fast protocol and a nearby server, many users see only a small reduction. Distant servers or older protocols can have a larger effect.
Q. Why is my VPN suddenly slow? Common causes are a far-away or overloaded server, an outdated app, or a slow underlying connection. Switching servers usually helps first.
Q. Which VPN protocol is fastest? WireGuard is widely regarded as one of the fastest modern protocols thanks to its lightweight design.
Last updated: 14 June 2026
