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Mouthwash: average UK price
Mouthwash (per bottle (300 - 600ml)) cost £3.81 on average in September 2026 — ▲ 7.9% in a year. Pay much more than this and it is worth shopping around.
UK average, September 2026£3.81per bottle (300 - 600ml)
Last month£3.652-yr range £3.45–£3.81
Average price, last 25 months
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£13.05Questions and answers
How much does mouthwash cost in the UK?
£3.81 for per bottle (300 - 600ml) on average in September 2026 (ONS).
Has it gone up?
Up 7.9% from £3.53 in September 2025.
What exactly is measured?
The ONS average price for the CPI item "Mouthwash" in the personal hygiene and wellness group, standardised to per bottle (300 - 600ml).
Source: ONS Shopping prices comparison tool (Open Government Licence v3.0).