Why is my upload speed so much slower than my download?

Because your internet provider designed it that way. Cable and DSL split the line's capacity unevenly, giving most of it to download because most people consume far more than they send. A ten-to-one ratio is normal and is not a fault.

Is low upload speed a fault I can report?

Usually not. If your upload roughly matches what your plan advertises, it is working as intended and your provider will not change it. It is only worth reporting if your wired upload is far below the advertised figure.

Why is my upload speed so slow?

Updated 14 July 2026

Short answer. Your upload is slow because your provider built it that way. Cable and DSL connections deliberately give most of the line's capacity to download, since most people consume far more than they send. A download that is ten times your upload is completely normal and is not a fault. It is only worth investigating if your wired upload is far below what your plan advertises.

This is a design decision, not a defect

The technologies most homes are connected with — cable and DSL — are asymmetric by design. The line has a fixed total capacity, and the provider chooses how to split it. They give the lion's share to download, because that is what most customers do most of the time, and because it is the number they advertise.

So a 200/20 plan is not a broken 200/200 plan. It is exactly the product you bought.

How to tell if yours is actually wrong

Check what you are paying for. Find the upload figure on your plan. It is there, usually in smaller print.
Test over an Ethernet cable. Wi-Fi is the single most common cause of a bad upload result and has nothing to do with your provider.
Compare. If your wired upload is close to the advertised figure, everything is working. If it is a fraction of it, you have something to report.

Test your upload speed →

Things that silently steal your upload

Cloud backup running in the background. Dropbox, Google Drive, iCloud and OneDrive will happily saturate your entire upload without telling you. This is the most common culprit by far.
Wi-Fi. Upload is more sensitive to a weak signal than download is. Move closer, or plug in.
An old router. Routers age badly. A restart fixes more than people expect; a replacement fixes more still.
Another device. A phone backing up its photo library will eat the line for everyone.
Peak hours. On cable, you share capacity with your neighbours. More on evening slowdowns →

What actually fixes it

If your upload matches your plan and it still is not enough for your work, no amount of troubleshooting will help. The fix is a different connection. Fibre is the answer, because fibre plans are usually symmetric or close to it — 300 down and 300 up, rather than 300 down and 20 up.

If fibre is not available where you are, the honest options are limited: schedule large uploads overnight, pause cloud sync while you are on calls, and lower your video call resolution.

Common questions

Can I increase my upload speed?

You cannot exceed what your plan allocates, but you can stop losing what you have: use a cable, pause cloud sync, restart an ageing router. If upload genuinely matters to your work, move to fibre.

Does upload speed affect video calls?

Yes, more than download does. Your camera feed is an upload. If you freeze for others but everyone looks fine to you, upload is the cause.

Is a 10:1 download to upload ratio bad?

It is ordinary for cable and DSL. It becomes a real problem only when your upload figure itself is too low in absolute terms — below about 5 Mbps.