Inflation Record£100 in 2017 → Today (United Kingdom)
Official data verified · CPI (ONS) · Annual average · Not seasonally adjusted · Data through September 2026 (fetched 2026-11-02) · CPI All items (D7BT), MM23 dataset
£137.41
+37.4% cumulative inflation · 2017–2026
Your £100 in 2017 would have the purchasing power of £137.41 in United Kingdom today.
What this means
- Purchasing power: £100 in 2017 had the same average buying power as £137.41 in 2026.
- Price level change: the overall consumer price level rose by 37.4% across this 9-year span; the purchasing power of a pound changed by -27.2%.
- This measures the broad basket of consumer goods and services (CPI (ONS)). Individual expenses moved at different rates.
What this means in other amounts
| In 2017 | Worth in 2026 |
|---|---|
| £1 | £1.37 |
| £5 | £6.87 |
| £10 | £13.74 |
| £20 | £27.48 |
| £50 | £68.70 |
| £100 | £137.41 |
| £500 | £687.04 |
| £1,000 | £1,374.08 |
| £10,000 | £13,740.76 |
| £100,000 | £137,407.62 |
Key facts about 2017
- Consumer prices rose 2.7% in 2017 — the 12th-largest annual increase in the 1988–2026 record.
- Measured by the older RPI instead of CPI, £100 in 2017 would equal £152.31 in 2026 — the two indexes have drifted apart, which is why this site never blends them.
- Since 2017, the overall price level has multiplied about 1.4× — £1.00 in 2017 buys what £1.37 buys in 2026.
£100 in 2017, decade by decade
| Year | Worth | Cumulative price change |
|---|---|---|
| 2026 | £137.41 | +37.4% |
Monthly CPI in 2017
| Period | Index | Change vs same period, prior year |
|---|---|---|
| January | 101.4 | 1.9% |
| February | 102.1 | 2.3% |
| March | 102.5 | 2.3% |
| April | 102.9 | 2.7% |
| May | 103.3 | 2.9% |
| June | 103.3 | 2.7% |
| July | 103.2 | 2.6% |
| August | 103.8 | 2.9% |
| September | 104.1 | 3.0% |
| October | 104.2 | 3.0% |
| November | 104.6 | 3.2% |
| December | 104.9 | 2.9% |
Annual average for 2017: 103.358
Verify this calculation
Series: CPI All items (D7BT), MM23 dataset; base 2015=100; not seasonally adjusted.
Index (2017 annual average): 103.358 · Index (2026 annual average): 142.022 · Ratio: 1.3741
Formula: amount × (indexend / indexstart). Formula v1.0 — annual-average CPI, NSA (per-country basis on each methodology page). Source: Office for National Statistics.