# Teeth Whitening UK: Costs, Options, and the Law

Source: https://thelocaldentist.co.uk/guides/teeth-whitening-uk/
Updated: Thu Aug 13

## Quick answer

Professional teeth whitening in the UK typically costs £250–£700 — dentist-made home kits from around £250, in-chair treatment £300–£700. By law, whitening with products above 0.1% hydrogen peroxide may only be carried out by GDC-registered dental professionals: beauty-salon whitening is illegal, and whitening is never available on the NHS because it's cosmetic.

## Who should skip this guide

Skip this guide if you have untreated decay, sore gums, or you are pregnant — get an exam first. Skip beauty-salon or kiosk whitening entirely; it is illegal without a GDC registrant. Whitening will not change crowns, veneers or fillings.

## Is teeth whitening legal in a beauty salon?

In the UK, teeth whitening using products with more than 0.1% hydrogen peroxide is legally the practice of dentistry — only dentists and other GDC registrants working to a dentist's prescription may carry it out.

That makes whitening in beauty salons, aesthetics clinics without a dentist, shopping-centre kiosks, or your living room via a mobile technician illegal — prosecutions happen regularly. The products sold legally over the counter are capped at 0.1% hydrogen peroxide, too weak to change your tooth shade meaningfully. So the practical choice is between whitening prescribed and supervised by a dentist, or products that don't really work. If you see whitening offered anywhere without a GDC-registered dentist involved, report it to the GDC rather than booking it.

## Your whitening options compared

## What results to realistically expect

Professional whitening typically lightens teeth by several shades, but the ceiling depends on your starting point and the cause of discolouration. Yellowing from age, tea, coffee, and red wine responds best. Grey shades, tetracycline staining, and fluorosis respond less predictably. Crowns, veneers, and fillings do not whiten at all — if you have visible ones, your dentist should plan around the mismatch, sometimes replacing them after whitening. Results usually last one to three years before a top-up, sooner if you smoke or drink a lot of staining drinks.

## Side effects and who should wait

## Spotting a provider to avoid

Warning signs: no dental examination before treatment, no GDC-registered dentist named anywhere, 'peroxide-free' miracle claims (legitimate whitening is peroxide-based; the common substitute chlorine dioxide can etch enamel), pressure to buy a course on the spot, and prices dramatically below the market — a £50 'laser whitening' session is not the same product as dentist-supervised whitening at £300–£700. Checking the clinician at gdc-uk.org takes under a minute and is the single most useful step.

## Find whitening near you

## Compare whitening providers

Desk-researched by The Local Dentist — not clinical advice.