For anyone selling online in the UK, 2026 has been a mixed year: online sales have grown well, but inflation has risen again and interest rates remain high by recent standards. This article pulls together the latest official figures and what they mean in practice. All data is the most recent published as of October 2026.
Online's share of retail: close to 29%
The Office for National Statistics measures what proportion of all retail sales in Great Britain are made online. In its August 2026 retail sales release, the ONS reported:
- 28.8% of retail sales were made online in August 2026, up from 28.4% in July.
- Online sales values rose 2.5% over the month and were 8.9% higher than in August 2025.
Earlier in the year the share went even higher. In June 2026 online reached 29.4% of sales — the highest proportion since April 2021 — with online sales values 14.4% higher than a year earlier.
What it means: online is now a structural part of UK retail, not a pandemic blip. Roughly £3 in every £10 spent in shops is spent online, and online sales are growing faster than retail as a whole.
Retail overall: modest growth
Across all retail, sales volumes in Great Britain rose 0.5% in August 2026 after a fall in July, and were 2.4% higher than a year earlier, according to the same ONS release. That's steady rather than spectacular — consumers are still spending, but carefully.
Industry measures tell a similar story. At the start of the year, IMRG forecast flat growth for the online market in 2026 after a weak January, and later reported that the market picked up in late spring and early summer, helped by warm weather and the World Cup. (IMRG and the ONS measure the market differently, so their growth rates aren't directly comparable.)
Inflation is back above 3%
Price pressure has returned. The ONS reported that CPI inflation rose to 3.5% in the 12 months to September 2026, up from 3.1% in August. Core inflation (excluding energy, food, alcohol and tobacco) was 2.8%. The largest upward contribution came from motor fuels, which were 29.8% more expensive than a year earlier.
What it means for online retailers:
- Delivery costs are under pressure as fuel prices rise.
- Shoppers are price-sensitive and compare more — clear pricing and value messaging matter.
- Margins need watching: check shipping thresholds, packaging and returns costs.
Interest rates: on hold, with a hawkish tilt
The Bank of England's Monetary Policy Committee held Bank Rate at 3.75% in September 2026, by a 6–3 vote. The three dissenting members wanted an increase to 4%, citing rising energy and food prices, and the Committee said the risks to inflation had tilted further to the upside. The next decision is due on 5 November 2026.
What it means: borrowing costs for stock, equipment and growth remain significant, and household budgets stay tight. Businesses planning investment should assume rates won't fall quickly.
What the data means for your online store
Online is still where the growth is
With online sales growing faster than retail overall, investing in your store — speed, conversion and search visibility — remains one of the better uses of a marketing budget.
Value and transparency win
When inflation rises, shoppers become more deliberate. Make prices, delivery costs and returns policies obvious, and show total cost early. Surprise charges at checkout are one of the fastest ways to lose a sale.
Protect your margin
- Review free-delivery thresholds against current courier costs.
- Encourage bigger baskets with bundles and relevant cross-sells.
- Reduce returns with better product information, photos and sizing guidance.
- Track profit per order, not just revenue.
Prepare for the Christmas peak
Black Friday and Christmas remain the most important trading weeks of the year. Test site speed under load, confirm delivery cut-off dates with couriers, and publish them clearly.
Get ready for AI-assisted shopping
Shoppers are starting to use AI assistants to research and compare products. Accurate product data, structured information and clear policies help your products appear — and be described correctly. We look at this in what shoppers expect from an online store in 2026.
Key figures at a glance
| Measure | Latest figure | Source |
|---|---|---|
| Online share of GB retail sales | 28.8% (Aug 2026) | ONS |
| Online sales value, year on year | +8.9% (Aug 2026) | ONS |
| Highest online share this year | 29.4% (Jun 2026) | ONS |
| Retail sales volumes, year on year | +2.4% (Aug 2026) | ONS |
| CPI inflation | 3.5% (Sep 2026) | ONS |
| Bank Rate | 3.75% (held Sep 2026) | Bank of England |
The ONS publishes its next retail sales figures on 23 October 2026.
Summary
Online now accounts for close to 29% of UK retail sales and is growing faster than retail overall, but rising inflation and high interest rates mean shoppers are cautious and costs are climbing. Retailers who combine a fast, trustworthy store with clear pricing and careful margin management are best placed for the peak and for 2027.
If your store needs to work harder, see our e-commerce website packages or ask us a question.