If you are about to start using a VPN, or you already do and your connection feels sluggish, the honest answer to the obvious question is: yes, a VPN usually slows your internet a little - but with the right setup, "a little" is all it should be, and in some cases a VPN can even make things faster. Here is exactly why it happens and how to keep the cost small.
Why a VPN slows things down at all
There is no way around two facts. First, a VPN encrypts your traffic, and encrypting and decrypting data takes a small amount of processing on both ends. Second, your traffic no longer goes straight to the website - it detours through the VPN server first, then on to the destination. That detour adds distance, and distance adds delay.
Together these mean some overhead is unavoidable. The goal is not to eliminate it - you cannot - but to keep it small enough that you never notice it in day-to-day use.
How much slowdown to expect
The size of the hit depends mostly on three things:
- Server distance. The closer the VPN server is to you, the less delay the detour adds. A server in your own country is far faster than one on another continent.
- Protocol. Modern, lightweight protocols based on WireGuard (NordVPN calls its version NordLynx) are much faster than older ones like OpenVPN.
- Server load. A crowded server shared by many users is slower than a lightly-loaded one.
Get those three right - a nearby, uncrowded server over a WireGuard-based protocol - and the loss is usually modest and invisible for browsing, video calls and streaming. Get them wrong - a distant, busy server over a heavy protocol - and the slowdown becomes obvious. Note too that latency (ping) rises with server distance, which matters for gaming and calls even when your download number looks fine.
When a VPN actually speeds you up
This surprises people: a VPN can sometimes make a connection faster. If your internet provider throttles certain traffic - deliberately slowing down video streaming, gaming or file-sharing - it has to be able to see what you are doing to target it. A VPN encrypts your traffic so the provider can no longer tell streaming from browsing, which means it cannot single out and slow that specific activity. On a throttled connection, the VPN's own small overhead is easily outweighed by escaping the throttling.
How to minimise the slowdown
If a VPN is dragging your speed down more than it should, work through these in order:
- Pick a nearby server. Unless you specifically need another country (for streaming a foreign catalogue, say), choose a server close to home.
- Use a WireGuard-based protocol. If your app offers WireGuard or a branded version like NordLynx, use it - it is the biggest single speed win over older protocols.
- Switch to a less busy server. Many apps show server load; pick a quieter one.
- Use a reputable VPN with a large, optimised network. More well-run servers means more nearby, uncrowded options, which is exactly what keeps speeds high.
- Prefer a wired connection where you can, and avoid running big downloads in the background while you test.
The single most reliable way to know your real cost is to measure it: run a quick before-and-after in our real-world VPN speed test with the VPN off and then on, using a nearby server.
The bottom line
A VPN trades a small amount of speed for privacy and security, and with a fast provider, a nearby server and a modern protocol, that trade is barely noticeable - while on a throttled connection it can even come out ahead. If speed is a priority, the levers that matter most are a WireGuard-based protocol and a large, well-optimised server network, because together they keep the unavoidable overhead as low as it can go.
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