Retail data analysis
Official ONS figures put online's share of UK retail at 28.3% in September 2026 — a point above a year earlier, ten points above 2019, and still well short of the January 2021 lockdown record of 37.8%.
The doorbell goes, another cardboard box lands on the mat, and someone in the house declares that nobody buys anything in a real shop any more. It is the received wisdom of every autumn, and it gets louder as Black Friday nears and spending forecasts pile up.
The official figures are calmer. In September 2026, online sales made up 28.3% of UK retail sales by value, according to the Office for National Statistics. That is a little over one pound in every four, which leaves the large majority of spending going through tills, counters and phone orders. Two details about the ONS series matter here. It counts internet sales by every kind of retailer, including high street chains with a website as well as online-only firms. It also covers Great Britain, and each monthly figure can be revised in later releases.
So the doorstep theory needs checking in three ways. How does today compare with a year ago, with the world before the pandemic, and with the lockdown winter when online shopping hit its highest point?
Before the pandemic, online was under one pound in five
The second check reaches back further. In September 2019, before Covid-19 closed shops, online accounted for 18.1% of UK retail sales. The September 2026 share is 10.2 percentage points above that pre-pandemic level.
| Month | Online share of UK retail sales value (%) | Difference from September 2026 (percentage points) |
|---|---|---|
| September 2019 | 18.1 | 10.2 below |
| January 2021 (highest month in the ONS series) | 37.8 | above |
| September 2025 | 27.3 | 1.0 below |
| September 2026 | 28.3 | n/a |
This is where the doorstep theory is strongest. In 2019, fewer than one pound in five spent with retailers went online. Today it is more than one in four. Whatever happened in between, September shoppers now put a clearly bigger share of their spending through screens than they did before the pandemic.
That gap is the real long-run story, and it is the comparison most worth quoting. It sets one September against another September and needs no forecast to make its point.
The lockdown record is still a long way off
The third check is the one that takes the edge off the louder claims. The highest monthly online share in the ONS series is 37.8%, set in January 2021, when non-essential shops in much of the country were shut. That is close to two pounds in every five.
September 2026 sits well below that mark. One caution applies, and it is the reason this comparison is weaker than the other two: the record is a January and today's figure is a September, so the two months are not like for like. January is a strange month for shopping in any year, and January 2021 was stranger than most. Read the record as a ceiling that shows how far online can reach when shops are closed, rather than as a target the market is heading back towards.
Here is how the four readings line up.
| Month | Online share of UK retail sales value (%) |
|---|---|
| September 2019 | 18.1 |
| January 2021 (highest month in the ONS series) | 37.8 |
| September 2025 | 27.3 |
| September 2026 | 28.3 |
Online takes a little over one pound in four
Put the three checks together and the picture is clear. Online's share of retail is a little higher than last year, much higher than before the pandemic, and well below the lockdown peak. The claim that "everything is online now" overstates it. So does the opposite claim, that shoppers went straight back to their old habits once the shops reopened.
The pandemic did leave a lasting mark on how people shop. Most retail spending still happens away from a screen, though, and the latest year-on-year change is measured in a single point.
What this means for UK businesses
Plan for both channels. A little over one pound in four going online means most customers still spend in shops, by phone or face to face. A strong website matters, and so does everything else a customer touches.
Compare like with like. If you track your own online share, set this September against last September. Seasonal swings can make an ordinary month look like a breakthrough or a slump.
Treat the lockdown record as a one-off. January 2021 shows how far online can stretch when shops are closed. It is a poor guide for budgeting a normal year.
Check the latest release before quoting it. The ONS revises monthly figures, so a number you saved last month may have moved. Quote the most recent release and say which month it covers.
The box on the doormat is real, and there are more of them than before the pandemic. Even so, for every parcel that arrives, most of the shopping that month still happened somewhere a customer could walk into.
Analysis compiled by Sayu (sayu.co.uk)
How we built it
Every figure comes from the Office for National Statistics monthly retail sales release, series J4MC, which reports internet sales as a share of total retail sales value. The series counts online sales by all retailers, including those that also trade from shops, and covers Great Britain. These are official ONS figures, published monthly and revised in later releases, so each value here is a snapshot of the release it came from.
We compared September 2026 with the same month in 2025 and 2019 so that each comparison sets like months side by side and seasonal patterns do not distort the result. The January 2021 record is the highest monthly share in the series. Because it is a January and the latest figure is a September, that comparison is not like for like. We present it as a reference point for how high the share has reached, and we drew no conclusion from it about direction.
We used no forecasts, no spending projections and no third-party estimates. The year-on-year change is a difference between two published figures; we did not test it for significance or model what drives it.
