Why is Wi‑Fi slow when I use my work VPN?
Encryption and the route through the employer’s VPN gateway add overhead and may be congested. Compare the same device with VPN on/off; a fast non‑VPN result points away from the ISP.
VPN endpoint; protocol; CPU; split tunnel; time; Wi‑Fi baseline.
Employer IT if only VPN path is affected.
Show the technical detail
On a managed Wi-Fi plan
Confirm gateway/client health; do not modify corporate VPN settings.
On another provider's router
Virgin also notes VPN can reduce speed.
What to be careful of
Never advise bypassing employer security policy.
Where this comes from: Official · see the original source ↗ · Draft—technical review · checked 17 August 2026