The UK isn’t as cheap for mobile data as you’d think
A new global study this month put a number on something worth knowing before your next SIM renewal: the UK’s average mobile data price works out at around £0.20 per gigabyte, once you average across thousands of live SIM-only tariffs.
That sounds reasonable in isolation. It’s less reassuring once you learn the UK ranked 46th out of 234 markets analysed, sitting behind France and Italy, though still ahead of Germany and Spain. Mobile data price comparisons like this rarely make headlines, but they’re a useful reality check against the idea that the UK market is automatically competitive.
Mobile data price has fallen sharply over the past decade as networks competed harder on SIM-only deals and data allowances grew. That longer trend is genuinely good news. It just doesn’t mean every deal on the shelf right now is equally good, or that the UK is automatically near the front of the global pack.
Why does mobile data price vary so much between deals?
The study, from Broadband Genie, analysed 3,446 SIM-only tariffs to work out the average mobile data price across each market. The UK figure is an average, not a floor, which means plenty of deals sit well above and well below that £0.20 per gigabyte mark depending on network, data allowance, and contract length.
Bigger data allowances usually bring the effective mobile data price down per gigabyte, while small, low-data SIMs tend to carry a higher price per gigabyte even if the headline monthly cost looks small. It’s the classic trap of comparing monthly prices instead of what you’re actually paying per unit of data.
eSIM-only plans and app-based challenger networks are often where the sharpest mobile data price sits, since they skip the cost of a physical SIM, retail stores, and some of the customer service overhead of the bigger networks. That’s not a rule you can rely on blindly, but it’s worth putting a couple of eSIM-only options into your comparison alongside the usual names.
How do you actually compare mobile data price between SIMs?
Divide the monthly cost by the data allowance in gigabytes. A £10 SIM with 20GB works out at 50p per gigabyte. A £15 SIM with 100GB works out at 15p per gigabyte, a noticeably better mobile data price despite costing more upfront. Contract length is worth a mention too. Rolling one-month SIMs sometimes carry a slightly higher mobile data price than a twelve-month equivalent, in exchange for the freedom to leave whenever you like.
This only works if you’d actually use the extra data. Paying less per gigabyte for an allowance you never touch isn’t a saving, it’s just a bigger unused number on your bill. Match the deal to your actual usage, not the deal that makes the best spreadsheet. Our guide on whether unlimited data is worth it is a good next read if you’re weighing that up specifically.
Key takeaways
- The UK’s average mobile data price is around £0.20 per gigabyte, ranking 46th of 234 markets studied.
- Bigger data allowances tend to bring the per-gigabyte mobile data price down.
- Work out cost divided by data allowance to compare deals fairly.
- Only chase a lower mobile data price if you’ll genuinely use the extra data.
- Check your actual usage in your phone’s settings before choosing an allowance.
3 checks to get a better mobile data price
Roo’s angle: this is less about hunting for the world’s cheapest SIM and more about not overpaying for data you already know you’ll use.
First, check your actual monthly data usage in your phone’s settings before comparing anything. Most people either wildly overestimate or underestimate what they actually get through in a month. On an iPhone it’s under Settings, Mobile Data. On Android it’s usually under Network and Internet, then Data Usage.
Second, work out the mobile data price per gigabyte on your current deal, then compare it against a couple of alternatives using the same sum. Our SIM-only comparison checklist walks through the rest of what to check beyond data alone.
Third, revisit the comparison every time your contract’s up for renewal. Mobile data price shifts fairly often as networks compete for new customers, so last year’s best deal isn’t necessarily still it. A SIM you switched to twelve months ago for a great mobile data price can quietly become an average one by the time it’s due for renewal again.
Frequently asked questions about mobile data price
- What is the UK’s average mobile data price?
- Around £0.20 per gigabyte, based on a September 2026 study of 3,446 SIM-only tariffs, ranking the UK 46th out of 234 markets.
- Is unlimited data always the best mobile data price?
- Only if you’d otherwise exceed a capped allowance regularly. If you use well under 20GB a month, an unlimited plan is rarely the cheapest per-gigabyte option.
- How do I work out mobile data price for my own SIM?
- Divide your monthly cost by your data allowance in gigabytes. That gives you a like-for-like figure to compare against other deals.
- Does network choice affect mobile data price?
- Yes, significantly. The same data allowance can carry a very different price depending on the network and whether you’re on a SIM-only or bundled contract.
- Why did the UK rank only 46th globally?
- The study compared average mobile data price across 234 markets worldwide; several European and lower-cost markets came out cheaper per gigabyte on average.
None of this needs a spreadsheet and a free evening. A couple of minutes with your usage figures and a calculator is enough to spot whether your current deal is genuinely competitive or just familiar.
