Best broadband for upload speed in the UK

Almost every broadband advert leads with a download speed. It is the big, friendly number. But the figure that quietly decides whether your video calls hold, how long a cloud backup takes, and whether sharing a large file is painless is the one underneath: upload. This guide is about which broadband technology gives you the best upload, and who actually needs to care. If you only want to know how much upload a video call needs, our upload speed for video calls guide answers that one question in detail.

Part-copper FTTC lines cap upload at around 20 Mbps, with most homes getting 10 to 15 Mbps, no matter how fast the download. Full fibre delivers far more, and on symmetric plans the upload matches the download. If you upload a lot, the broadband technology matters more than the headline download speed.

Upload speed by broadband technology

Upload is decided first by the technology your line uses, long before the specific package. These are the typical ranges you will meet across UK connections. Exact figures vary by plan and address, so treat them as the shape of each technology rather than a quote.

The single most important line in that table is FTTC. A home on a part-copper line can have a healthy download and still be stuck at 10 to 15 Mbps upload, which is why calls wobble and backups crawl on lines that otherwise look fast.

How much upload speed do you actually need?

Upload requirements stack up by what you do, not by what you download. Here is a realistic picture of common uses:

• HD video call: roughly 3 to 5 Mbps per person on the call.
• Two people working from home: 20 to 30 Mbps upload, more if both are on calls while files sync in the background.
• Cloud backup: the more upload you have, the faster a large backup finishes. On thin upload, backing up a big photo library can run for hours and squeeze everything else.
• Content creation: uploading high-resolution video to a platform is one of the most upload-hungry things a home does, and it is where full fibre upload earns its keep.
• Security cameras and smart home: a few Mbps per camera, constantly, which quietly eats a thin upload all day.

If the term itself is new, our upload speed glossary entry explains what it is and how to read it on a speed test.

Why FTTC upload is the hidden problem

FTTC runs fibre to the green street cabinet, then copper for the final stretch to your home. That copper last mile is the bottleneck, and it hits upload hardest. The technology is built asymmetric, with most of its limited capacity given to download, so even a fast-looking FTTC line tops out at around 20 Mbps upload and usually delivers less.

This matters more every year as homes do more uploading, more video calls, more cloud sync, more shared files. It also has an end date: the old copper-based services are being retired, and full fibre is replacing them. Our full fibre vs FTTC guide covers that transition and the FTTC glossary entry explains the copper limit in plain terms.

Which broadband gives the best upload speed?

For upload, full fibre is the answer. It removes the copper bottleneck entirely, delivering tens of Mbps on entry tiers and, on symmetric plans, upload that matches the download right up to gigabit. That is the headroom that lets two calls, a cloud backup and a big file upload all run at once without any of them choking.

Inspire Telecom runs on the Openreach network and leads with full fibre for exactly this reason, with honest advice on what your address can get before you sign. Inspire is the UK's #1 Internet Provider on Trustpilot, rated 4.9 from 600+ reviews. If upload is what has been letting you down, you can check the upload available at your address. For anyone whose work depends on it, business broadband adds prioritised traffic, a service level agreement and proper UK support.

Frequently asked questions about broadband upload speeds