Whether you’re working remotely, gaming online, or streaming HD video, internet lag can turn even the best connection into a frustrating experience. But before blaming your ISP or upgrading your plan, it’s important to understand what causes lag and how to troubleshoot it effectively.
Here’s how to identify and fix the most common sources of lag at home—without the need for a technician.
Step 1: Run a Speed and Latency Test
Before making changes, get a snapshot of your network’s performance using tools like:
- Speedtest by Ookla for download/upload speeds and ping
- PingPlotter for tracking latency across your network path
- Fast.com for a Netflix-optimized speed check
Look for these red flags:
- Download speeds significantly below your plan
- Upload speeds under 5 Mbps (problematic for video calls)
- Ping over 100 ms (can cause delays in gaming and real-time apps)
Step 2: Reboot Your Modem and Router
It sounds simple, but rebooting clears memory and resets network conflicts. Power down your modem and router for at least 30 seconds, then restart. Do this monthly—or weekly if lag is common.
Step 3: Check for Device Overload
Lag often comes from network congestion, especially when:
- Multiple users stream at once
- Smart devices run background updates
- Large downloads occur (like game patches or cloud backups)
Fix:
Log into your router’s admin page and check the device list. Disconnect unnecessary or idle devices. Enable Quality of Service (QoS) to prioritize important traffic like Zoom calls or Teams meetings.
Step 4: Optimize Router Placement
Your router’s location has a huge impact on performance. Place it:
- Centrally located, on an elevated surface
- Away from walls, metal, and appliances
- In an open area—not behind a TV or in a cabinet
For larger homes, consider upgrading to a mesh Wi-Fi system like Eero or Google Nest WiFi.
Step 5: Use Wired Connections When Possible
Ethernet is more stable and faster than Wi-Fi. If you’re experiencing lag during work meetings or online gaming, use a Cat5e or Cat6 Ethernet cable to connect your computer directly to the router.
Step 6: Scan for Wi-Fi Interference
Nearby networks or physical interference can disrupt your signal. Use tools like NetSpot to identify interference and suggest the best Wi-Fi channels.
Step 7: Update Firmware and Device Drivers
Outdated firmware or network drivers can lead to lag or compatibility issues.
- Update your router firmware from the manufacturer’s website (e.g., Netgear, TP-Link)
- Update your computer’s Wi-Fi drivers via Device Manager or the manufacturer’s support page
Step 8: Check for ISP Throttling or Service Interruptions
Your internet provider may throttle speeds during peak times or after reaching a data cap. Log into your ISP account to check data usage, or visit Downdetector to see if outages are affecting your area.
Bonus: Upgrade Your Hardware
If troubleshooting doesn’t fix the issue and your equipment is more than 4–5 years old, upgrading to a modern router that supports Wi-Fi 6 or Wi-Fi 6E can significantly improve performance.
Check the latest reviews on PCMag to find routers suited for your usage level.
Final Thoughts
Internet lag isn’t always your provider’s fault. Many causes are within your control—from overloaded devices to outdated hardware. By methodically testing and optimizing each factor, you can eliminate lag and enjoy a faster, smoother connection for everything you do online.
