Inflation Record£100 in 1998 → 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
£199.59
+99.6% cumulative inflation · 1998–2026
Your £100 in 1998 would have the purchasing power of £199.59 in United Kingdom today.
What this means
- Purchasing power: £100 in 1998 had the same average buying power as £199.59 in 2026.
- Price level change: the overall consumer price level rose by 99.6% across this 28-year span; the purchasing power of a pound changed by -49.9%.
- 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 1998 | Worth in 2026 |
|---|---|
| £1 | £2.00 |
| £5 | £9.98 |
| £10 | £19.96 |
| £20 | £39.92 |
| £50 | £99.79 |
| £100 | £199.59 |
| £500 | £997.93 |
| £1,000 | £1,995.86 |
| £10,000 | £19,958.62 |
| £100,000 | £199,586.21 |
Key facts about 1998
- Consumer prices rose 1.6% in 1998 — the 28th-largest annual increase in the 1988–2026 record.
- Measured by the older RPI instead of CPI, £100 in 1998 would equal £254.80 in 2026 — the two indexes have drifted apart, which is why this site never blends them.
- In the decade after 1998, prices rose 19.1% in total.
£100 in 1998, decade by decade
| Year | Worth | Cumulative price change |
|---|---|---|
| 2008 | £119.07 | +19.1% |
| 2018 | £148.85 | +48.8% |
| 2026 | £199.59 | +99.6% |
Monthly CPI in 1998
| Period | Index | Change vs same period, prior year |
|---|---|---|
| January | 70.3 | 1.6% |
| February | 70.5 | 1.6% |
| March | 70.7 | 1.7% |
| April | 71.1 | 1.9% |
| May | 71.4 | 2.0% |
| June | 71.3 | 1.6% |
| July | 71.0 | 1.6% |
| August | 71.2 | 1.3% |
| September | 71.5 | 1.3% |
| October | 71.5 | 1.3% |
| November | 71.6 | 1.4% |
| December | 71.8 | 1.6% |
Annual average for 1998: 71.158
Verify this calculation
Series: CPI All items (D7BT), MM23 dataset; base 2015=100; not seasonally adjusted.
Index (1998 annual average): 71.158 · Index (2026 annual average): 142.022 · Ratio: 1.9959
Formula: amount × (indexend / indexstart). Formula v1.0 — annual-average CPI, NSA (per-country basis on each methodology page). Source: Office for National Statistics.