Many people assume a VPN instantly cripples their connection, but the reality is more nuanced. Whether you notice a slowdown depends on your base speed, the protocol you use, and the distance to the server you connect to.

• Encryption overhead is small on modern hardware: WireGuard and modern AES-NI chips add only a few milliseconds of latency, which is invisible in everyday browsing.
• Distance matters most: Connecting to a server on another continent adds hundreds of milliseconds of round-trip time, so always pick a server near your physical location for speed-critical tasks.
• Your ISP’s routing may be the real bottleneck: Some ISPs throttle streaming or gaming traffic; a VPN can actually bypass that throttling and make connections faster.
• Test with the right tools: Run a speed test with the VPN on and off at the same time of day, using the same server region, to get a fair comparison.

Verdict: A quality VPN with WireGuard usually costs you under 10% speed, and it can even improve performance if your ISP throttles traffic. The slowdown you hear about is mostly from free VPNs and far-away servers.