Does a VPN slow down your internet? Yes — here's how much

Every VPN adds two costs to your connection: encryption work on your device, and a detour through an extra server. What that costs in practice runs from a dip you will never notice to a connection cut by three quarters — published figures span a 5% loss at one end and 77% at the other. Where you land depends on four factors you can mostly control, and speed is one of the criteria behind our full VPN rankings.

Why does a VPN slow down your internet?

Four causes, and they are not equal.

• Server distance. Your traffic travels to the VPN server before it reaches the website, and the response makes the same detour back. Cloudflare’s explanation is the plainest: latency rises because requests and responses travel farther. Pick a server on another continent and every click pays that toll twice.
• Server load. A VPN server is shared. When too many users sit on one server, it congests and everyone’s throughput drops.
• Protocol. The rules your tunnel runs on. WireGuard-family protocols are widely described as the fastest option; among OpenVPN’s two modes, CNET notes UDP is faster than TCP.
• Encryption. Every packet gets encrypted and decrypted, which takes processing power. Modern encryption is efficient, though — by itself it is usually the smallest of the four costs.

A single percentage also hides that “speed” is three numbers. Security.org ran 120 speed tests and found download dropped, upload dropped, and latency rose — separate effects that hit different tasks. Uploads carry your side of a video call, and latency is what gaming feels first; if ping is your priority, start with the best VPNs for gaming.

How much speed will you actually lose?

Scenario	Typical speed loss	Who reports it
Premium paid VPN	10–20%	CompareInternet, aggregated review data
NordVPN’s own estimate	around 5–25%	NordVPN
Mid-tier paid VPN	20–40%	CompareInternet
Free VPN	50–80% or more	CompareInternet
Wi-Fi worst case	up to 77%	HighSpeedInternet

Percentages only mean something against your starting speed. A 20% loss on a 250 Mbps line leaves 200 Mbps; the same 20% on a 25 Mbps line leaves 20, and you will feel that on every video call. Proton VPN’s guidance points the same way: with a nearby server and a fast protocol like WireGuard, the loss stays minimal.

One honesty note: every figure above is the cited publisher’s, not ours — VPN Picks runs no speed benchmarks. That is exactly why the do-it-yourself test below is worth ten minutes of your time.

Why are free VPNs so much slower?

Congestion on weaker infrastructure, mostly: more users per server, less hardware behind them. That is how losses reach the 50–80% band. Two providers in our coverage publish their free limits plainly: Proton VPN’s free plan has no data cap but is rated “medium speed” by Proton itself, on servers in 10 countries picked for you; Windscribe’s free tier gives 10 GB a month with a confirmed email, also across servers in 10 countries. If free is the budget, the best free VPNs weighs those limits against each other.

Which protocol should you use?

The fastest setting you control is in your VPN app’s preferences. Reach for WireGuard or your provider’s WireGuard build first; fall back to OpenVPN UDP before OpenVPN TCP. The trade-offs behind that order are in WireGuard vs OpenVPN. Here is what each major provider actually runs:

Protocol support by provider (as of 23 Jul 2026)

Provider	WireGuard support	Other protocols
NordVPN	NordLynx — its own WireGuard build, post-quantum since 2025	OpenVPN
ExpressVPN	Customized WireGuard with post-quantum protection	Lightway (default, in-house), OpenVPN, IKEv2
Surfshark	WireGuard on the full network — all servers on 10 Gbps ports	IKEv2, OpenVPN
Proton VPN	WireGuard	OpenVPN (UDP and TCP), Stealth
Mullvad VPN	WireGuard only — OpenVPN removed 15 Jan 2026	None
CyberGhost	WireGuard	OpenVPN, IKEv2
Private Internet Access	WireGuard	OpenVPN
Windscribe	WireGuard	IKEv2, OpenVPN, Stealth, WSTunnel

Can a VPN make your internet faster?

Sometimes — in one specific case. If your ISP throttles certain kinds of traffic, a VPN’s encryption hides what type of traffic you are sending, so the throttle has nothing to target. NordVPN, Proton VPN, Windscribe, and Fortinet all describe this effect. Treat it as the exception: on an unthrottled line, a VPN can only take speed away, not add it.

How do you measure what a VPN costs you?

CNET’s testing guidance is the right baseline method, and it takes three steps:

1. Test with the VPN off. Run a speed test and record all three numbers — download, upload, and ping.
2. Remove the noise. Close background apps that use bandwidth, and plug into Ethernet instead of Wi-Fi if you can.
3. Test again with the VPN on its nearest server. The gap between the two results is your real cost.

If that gap is worse than the 10–20% a premium service typically shows, work through the causes in order of likely impact: move to the nearest server, try a different server in the same region since load varies between them, switch to WireGuard or your provider’s WireGuard build, and choose UDP over TCP if OpenVPN is all you have.

Frequently asked questions

Frequently asked questions

How much does a VPN slow down your internet?

Aggregated review data puts premium paid VPNs at a 10–20% loss, mid-tier services at 20–40%, and free VPNs at 50–80% or more. NordVPN's own estimate is around 5–25%. Server distance, server load, and protocol choice decide where in those ranges you land.

Can a VPN make your internet faster?

Sometimes. If your ISP throttles certain traffic, the VPN's encryption stops the throttle from identifying it, and speeds can improve — NordVPN, Proton VPN, Windscribe, and Fortinet all describe this case. Without throttling, a VPN adds overhead, never speed.

Which VPN protocol is fastest?

WireGuard-family protocols are widely described as the fastest, including provider builds such as NordVPN's NordLynx. If OpenVPN is your only option, UDP runs faster than TCP, per CNET's testing advice.

Does VPN server distance affect speed?

Yes. Traffic detours through the VPN server in both directions, so a farther server means more travel and more latency — Cloudflare cites that extra distance as a core cause of VPN slowdown. Connecting to the nearest server is the easiest single fix.

Does encryption slow down a VPN?

Yes, but usually only a little. Encrypting and decrypting every packet takes processing power, yet modern encryption is efficient — server distance and server load normally cost far more than the encryption itself.

Do free VPNs slow your internet more?

Generally, yes. Free servers carry more users on weaker infrastructure, and aggregated data puts free-VPN losses at 50–80% or more against 10–20% for premium services. Even the transparent free tiers have limits: Proton VPN rates its free plan 'medium speed' and Windscribe caps free use at 10 GB a month.

Will a VPN slow down streaming or gaming?

It can, because both depend on throughput and latency. A fast VPN on a nearby server usually keeps the impact small enough for normal use. Gaming feels latency first, so server distance matters more there than headline download speed.

Does a VPN slow down your Wi-Fi?

No — a VPN does not change the Wi-Fi signal itself; it affects the traffic passing through the connection, as Kaspersky explains. The slowdown comes from the VPN path, and it can be large: HighSpeedInternet reports Wi-Fi speeds dropping by as much as 77% with a VPN connected.