What is the best affordable sunscreen in the UK?

In our catalogue, Beauty of Joseon Relief Sun: Rice + Niacinamide offers SPF50+ PA++++ for £15 on the brand’s UK store. See our Korean sunscreen guide for alternatives.

Can I use The Ordinary vitamin C and retinal together?

The Ordinary advises against combining its vitamin C suspension with retinoids. Use them on different evenings, or choose one.

Are cheap skincare products as good as expensive ones?

Price is not a measure of formula quality. Compare the active ingredient, its stated strength and the directions; several of the most studied actives are available under £20.

How did you check the prices?

Every price is the RRP on the official UK page or a named UK retailer on 25 September 2026. Prices change, so check before you buy.

Best of · Skin prep · 7 picks

The best affordable beauty under £20.

Seven high-street and direct-to-consumer picks across skin, makeup and hair, each with a verified UK price under £20 and the trade-offs that come with it.

By Kaiser Khan, Founder & Editor Updated 25 September 2026 Editorial policy

Quick answer

What are the best beauty products under £20?

For a complete routine under £20 a product: Beauty of Joseon Relief Sun (£15) for sunscreen, The Ordinary Vitamin C Suspension (£7.70), The Ordinary Glycolic Acid 7% toner (from £8), Geek & Gorgeous A-Game 10 retinal (£17.95), Maybelline Fit Me Matte + Poreless (from £8.99), L’Oréal Telescopic Lift mascara (£12.99) and Elvive Bond Repair (£16.99).

Selection is editorial and never paid for. Prices are UK guide prices from official pages or named retailers when checked, and may have changed. How we chose.

Our top picks

The shortlist, by what each does best.

Best sunscreen Relief Sun: Rice + Niacinamide SPF50+ Beauty of Joseon · SPF50+ PA++++ · £15
Best vitamin C Vitamin C Suspension 23% + HA Spheres 2% The Ordinary · 23% L-ascorbic acid · £7.70
Best exfoliant Glycolic Acid 7% Exfoliating Toner The Ordinary · 7% glycolic acid · from £8
Best retinoid A-Game 10 Geek & Gorgeous · 0.1% retinal · fragrance-free · £17.95
Best foundation Fit Me Matte + Poreless Foundation Maybelline · 38 shades · oil-free · from £8.99
Best mascara Telescopic Lift Mascara L’Oréal Paris · Double-sided brush · £12.99
Best hair treatment Elvive Bond Repair Pre-Shampoo Treatment L’Oréal Paris · Pre-shampoo · 5 minutes · £16.99

Side by side

How the picks compare.

Specifications are summarised from each official product page. Read across a row to see where a product fits; the detailed notes below explain the trade-offs.

Best affordable beauty under £20: how the picks compare
Product	Award	Finish	Key spec	Guide price
Relief Sun: Rice + Niacinamide SPF50+Beauty of Joseon · SPF50+ PA++++ cream sunscreen	Best sunscreen	Dewy, lightweight cream	SPF50+ PA++++ · £15	£15
Vitamin C Suspension 23% + HA Spheres 2%The Ordinary · Water-free vitamin C suspension	Best vitamin C	Slightly granular	23% L-ascorbic acid · £7.70	£7.70
Glycolic Acid 7% Exfoliating TonerThe Ordinary · AHA toner	Best exfoliant	Exfoliated	7% glycolic acid · from £8	from £8
A-Game 10Geek & Gorgeous · Retinal serum	Best retinoid	Silky emulsion	0.1% retinal · fragrance-free · £17.95	£17.95
Fit Me Matte + Poreless FoundationMaybelline · Liquid foundation	Best foundation	Natural matte	38 shades · oil-free · from £8.99	from £8.99
Telescopic Lift MascaraL’Oréal Paris · Lengthening mascara	Best mascara	Lifted length	Double-sided brush · £12.99	£12.99
Elvive Bond Repair Pre-Shampoo TreatmentL’Oréal Paris · Pre-shampoo hair treatment	Best hair treatment	Conditioned feel	Pre-shampoo · 5 minutes · £16.99	£16.99

Specifications from official brand pages; prices are UK guide prices from the brand’s official page or a named UK retailer, checked 25 September 2026. Prices and formulas can change.

The picks in detail

Why each one earns its place.

Strengths and limitations are drawn from specifications — texture, finish, shade range, filters, fragrance, price and availability — not from wear testing.

Best sunscreen

Relief Sun: Rice + Niacinamide SPF50+

Beauty of Joseon

Relief Sun offers SPF50+ PA++++ with modern UK/EU filters, rice extract and niacinamide in a dewy, fragrance-free cream. No sunscreen in our catalogue offers a higher labelled protection for less.

Format: SPF50+ PA++++ cream sunscreen
Finish: Dewy, lightweight cream
Key spec: SPF50+ PA++++ · £15

What stands out

SPF50+ PA++++ for £15
Fragrance-free and alcohol-free, per the brand
Dewy finish that sits well under makeup

Consider first

No water resistance claimed
The brand’s UK store was sold out when checked; retailers list it at £15.50

Read the full product guide Beauty of Joseon official page Guide price: £15

Best vitamin C

Vitamin C Suspension 23% + HA Spheres 2%

The Ordinary

The Ordinary’s suspension delivers L-ascorbic acid — the most studied form of vitamin C — at £7.70. The brand is clear about the trade-offs: a slightly granular texture, expected tingling and evening use.

Format: Water-free vitamin C suspension
Finish: Slightly granular
Key spec: 23% L-ascorbic acid · £7.70

What stands out

L-ascorbic acid for £7.70
Water-free base for stability
Vegan, per the brand

Consider first

Tingling and a granular texture, per the brand
Directed for evening use
Not to be combined with niacinamide or retinoids, per the brand

Read the full product guide The Ordinary official page Guide price: £7.70

Best exfoliant

Glycolic Acid 7% Exfoliating Toner

The Ordinary

A 7% glycolic acid toner at around pH 3.6 for evening exfoliation, from £8 for 100ml. The brand’s directions are careful — patch test, avoid compromised skin and use sunscreen while using AHAs.

Format: AHA toner
Finish: Exfoliated
Key spec: 7% glycolic acid · from £8

What stands out

From £8 for 100ml; a 240ml size is sold
Stated pH of about 3.6
Clear safety directions from the brand

Consider first

Not for sensitive, peeling or compromised skin
AHAs increase sun sensitivity — sunscreen is essential
Evening use only

Read the full product guide The Ordinary official page Guide price: from £8

Best retinoid

A-Game 10

Geek & Gorgeous

A-Game 10 gives 0.1% retinal in a fragrance-free emulsion for £17.95, with a written build-up schedule. A-Game 5, at 0.05%, is the gentler way in for beginners.

Format: Retinal serum
Finish: Silky emulsion
Key spec: 0.1% retinal · fragrance-free · £17.95

What stands out

0.1% retinal for £17.95
Free from fragrance and essential oils, per the brand
Lower-strength A-Game 5 available

Consider first

Positioned for experienced users
Sold mainly through the brand’s UK shop
Not for use during pregnancy, per the brand

Read the full product guide Geek & Gorgeous official page Guide price: £17.95

Best foundation

Fit Me Matte + Poreless Foundation

Maybelline

Fit Me Matte + Poreless is oil-free and non-comedogenic, with a matte finish and 38 UK shades, from £8.99. It is the lowest-priced foundation with a verified UK price in our catalogue.

Format: Liquid foundation
Finish: Natural matte
Key spec: 38 shades · oil-free · from £8.99

What stands out

From £8.99 at Boots
Oil-free and non-comedogenic
38 UK shades

Consider first

Contains denatured alcohol and parabens
No SPF

Read the full product guide Maybelline official page Guide price: from £8.99

Best mascara

Telescopic Lift Mascara

L’Oréal Paris

Telescopic Lift pairs a double-sided brush with a ceramide formula for length and lift at £12.99, with a separate waterproof version.

Format: Lengthening mascara
Finish: Lifted length
Key spec: Double-sided brush · £12.99

What stands out

£12.99 at Boots and Superdrug
Suitable for sensitive eyes, per the brand
Waterproof version available

Consider first

Three shades
Length rather than dramatic volume

Read the full product guide L’Oréal Paris official page Guide price: £12.99

Best hair treatment

Elvive Bond Repair Pre-Shampoo Treatment

L’Oréal Paris

Elvive’s weekly pre-shampoo treatment brings a bond-care step to the high street at £16.99 RRP for 200ml — and it was half price at Boots when checked.

Format: Pre-shampoo hair treatment
Finish: Conditioned feel
Key spec: Pre-shampoo · 5 minutes · £16.99

What stands out

£16.99 RRP for 200ml, often discounted
Five minutes, once a week
Widely stocked

Consider first

Contains fragrance
Brand results come from using the full Bond Repair routine

Read the full product guide L’Oréal Paris official page Guide price: £16.99

What to look for

Read the label before the award.

Price per use, not per bottle

Compare size and how much each use needs. A £8 exfoliating toner used a few evenings a week lasts far longer than a £8 foundation used daily.

RRP versus offers

High-street prices change weekly with multi-buy and percentage offers. We list RRP; check the current price before you buy.

Sunscreen first

If you are building a routine on a budget, put sunscreen before serums. An affordable SPF50+ you will reapply is worth more than an expensive one you will not.

Strong actives are still strong

A low price does not mean a gentle formula. Introduce vitamin C, glycolic acid and retinal one at a time, and follow each brand’s directions.

Do not stack clashing actives

The Ordinary advises against using its vitamin C with retinoids. Keep vitamin C, exfoliants and retinal on separate evenings or in separate routines.

Read the full name

Budget ranges often have similar names — Telescopic, Telescopic Lift, Telescopic Extensionist. Check the exact product before buying.

How we chose

Desk research, stated plainly.

This guide is desk research. We compared beauty products with a verified UK price under £20 using the brands’ published formulas, ingredient lists, specifications and directions, together with UK prices from official pages or named retailers on 25 September 2026. None of the products was tested in a laboratory or worn by our editors for this guide.

Every pick had a price under £20 on its official UK page or at a named UK retailer on 25 September 2026, using RRP rather than temporary offers. Products whose UK price we could not verify were left out, however inexpensive they appear.

Awards describe fit — the job a product is best suited to — rather than a single overall score. Brand claims are reported as brand claims. No brand paid for inclusion, and shopping links elsewhere on the site do not influence which products appear here.

Questions

Best affordable beauty under £20, answered

What is the best affordable sunscreen in the UK?: In our catalogue, Beauty of Joseon Relief Sun: Rice + Niacinamide offers SPF50+ PA++++ for £15 on the brand’s UK store. See our Korean sunscreen guide for alternatives.
Can I use The Ordinary vitamin C and retinal together?: The Ordinary advises against combining its vitamin C suspension with retinoids. Use them on different evenings, or choose one.
Are cheap skincare products as good as expensive ones?: Price is not a measure of formula quality. Compare the active ingredient, its stated strength and the directions; several of the most studied actives are available under £20.
How did you check the prices?: Every price is the RRP on the official UK page or a named UK retailer on 25 September 2026. Prices change, so check before you buy.

Sources

Where the facts come from.

All sources checked 25 September 2026. Spotted an error? Email desk@thecastindex.com or read our corrections policy.

Head to head

Deciding between two?

Side-by-side comparisons of products in this guide, with a specification table and a “choose this if” verdict.

Beauty of Joseon vs Round Lab Relief Sun vs Birch Juice Sun Cream

Keep exploring

What are the best beauty products under £20?

The shortlist, by what each does best.

How the picks compare.

Why each one earns its place.

Relief Sun: Rice + Niacinamide SPF50+

What stands out

Consider first

Vitamin C Suspension 23% + HA Spheres 2%

What stands out

Consider first

Glycolic Acid 7% Exfoliating Toner

What stands out

Consider first

A-Game 10

What stands out

Consider first

Fit Me Matte + Poreless Foundation

What stands out

Consider first

Telescopic Lift Mascara

What stands out

Consider first

Elvive Bond Repair Pre-Shampoo Treatment

What stands out

Consider first

Read the label before the award.

Price per use, not per bottle

RRP versus offers

Sunscreen first

Strong actives are still strong

Do not stack clashing actives

Read the full name

Desk research, stated plainly.

Best affordable beauty under £20, answered

What is the best affordable sunscreen in the UK?

Can I use The Ordinary vitamin C and retinal together?

Are cheap skincare products as good as expensive ones?

How did you check the prices?

Where the facts come from.

Deciding between two?

More best-of guides.