Why Is My Internet So Slow?

Pages take forever to load. Videos buffer constantly. The Zoom call freezes mid-sentence. Slow internet is one of the more frustrating problems because the cause could be anywhere: your device, your Wi-Fi, your router, your modem, your wires, your ISP, even your neighbors.

Here's how to narrow it down quickly and figure out where the actual bottleneck is, before you call your provider and waste an hour on hold.

Step 1: Test your real speed

Before anything else, find out what speed you're actually getting. Go to fast.com (Netflix's free tool, no ads). It runs automatically when you open the page.

Run it three times to get a representative average. Write down the result. Compare it to what your provider promises (your plan should say "300 Mbps" or "1 Gbps" or similar).

• Getting at least 80% of your plan speed? Your internet is working fine. The problem is on your end (Wi-Fi, a specific device, a specific service). Continue with the rest of this guide.
• Getting less than 50% of your plan speed? Your ISP is delivering less than they promised. This is a call to them, not a fix-it-yourself problem.

Step 2: Test wired vs Wi-Fi

If you can, plug a laptop directly into the router with an ethernet cable. Test again at fast.com.

• Wired speed is fast, Wi-Fi is slow: your problem is Wi-Fi, not internet. Skip to Step 6.
• Wired speed is also slow: your internet (or modem/router) is the problem. Continue.

This single test separates "internet problem" from "Wi-Fi problem," which most people confuse.

Step 3: Check if it's just one device

Test fast.com on a few different devices in your house. If only one is slow, the problem is that device (clear its browser cache, restart it, check for malware). If all of them are slow, the problem is your network.

Step 4: Check what's hogging your bandwidth

Sometimes you're not actually slow, you're just sharing your connection with too many things at once:

• Someone streaming 4K Netflix on the TV
• A console downloading a 100 GB game update
• Cloud backup (iCloud, OneDrive, Backblaze) uploading photos in the background
• Security cameras streaming to the cloud
• Your laptop downloading Windows updates

Pause everything you can think of and re-test. If speed jumps back up, you've found your bandwidth hog.

Step 5: Check your modem and router age

Both wear out. Cable modems typically last 4-6 years before becoming flaky. Routers similar.

• If yours is rented from your ISP and is more than 4 years old, ask them to ship you a new one (often free if you're renting)
• If you own your modem and it's older than 5 years and you're paying for fast internet, an upgrade often dramatically improves speeds
• If your router is more than 5 years old (no Wi-Fi 6 support), it's probably bottlenecking your Wi-Fi speeds

Step 6: Improve your Wi-Fi

If wired is fast but Wi-Fi is slow, here's the playbook:

Get closer to the router

Wi-Fi loses speed dramatically with distance. Two rooms away with a wall between you and the router can cut your speed in half. Test right next to the router as a comparison.

Use 5 GHz instead of 2.4 GHz

Most modern routers broadcast two networks: one labeled with "2.4" and one with "5" (or sometimes the same name and the device picks). Connect to the 5 GHz one. It's much faster but shorter range. If your router uses one combined network name, that decision is being made for you automatically.

Move the router to a better spot

Routers stuck in closets, behind TVs, or on the floor give bad signal everywhere. Put it up high, in open air, somewhere central in the house.

Switch Wi-Fi channels

If your neighbors all have routers on the same Wi-Fi channel as yours, your signal fights theirs for bandwidth. Log into your router's settings (type 192.168.1.1 or 192.168.0.1 in a browser), find "Wi-Fi channel," and either set it to Auto or pick channel 1, 6, or 11 (for 2.4 GHz) or channel 36 (for 5 GHz).

Step 7: Consider a mesh Wi-Fi system

If your house is bigger than a small apartment, or has weird walls or multiple floors, a single router can't cover it well. Mesh systems like Google Nest Wi-Fi, eero, or TP-Link Deco use multiple units that work together. The difference is dramatic if you've been struggling with coverage. Setup is also simple. Usually 15 minutes via an app.

Step 8: Check for malware or rogue devices

Sometimes slow internet on one device is malware uploading data or mining cryptocurrency in the background. Run a full virus scan (Windows Security on PC, Malwarebytes free version on Mac).

Also check your router's connected devices list (in its settings). If you see devices you don't recognize, your Wi-Fi password may have been shared too widely. Change it.

Step 9: Call your ISP (with data)

If you've worked through everything above and your speed test consistently shows you're getting much less than your plan, call your provider. But come prepared:

• Have a few days of fast.com speed test results with times noted
• Mention you tested wired (eliminates Wi-Fi as a factor)
• Ask specifically: "Am I getting the speed my plan promises?"
• If they offer a "tech visit" but you've already done all the troubleshooting yourself, push for line testing or modem replacement

You may be able to negotiate a credit if they've been delivering substandard service.