Prom Dresses Under £100: Affordable Luxury

Get the look you love for less with our collection of prom dresses under £100. At HappyProm, we believe every student deserves to shine, regardless of their budget. Our affordable prom gowns feature the same high-quality craftsmanship as our premium lines, including free custom-made service to ensure your dress fits perfectly without the added cost of alterations.

▼ Smart Shopping: How to Find the Best Prom Dress for Under £100

High-Quality, Cheap Prom Dresses in the UK

Searching for cheap prom dresses in the UK doesn't mean you have to compromise on style or quality. Our **under £100 collection** is carefully curated to offer the latest 2026 trends—from shimmering sequins to elegant chiffon—at prices that won't break the bank. Whether you are looking for a short party dress or a floor-length evening gown, HappyProm provides luxury aesthetics at a fraction of the boutique price.

Save More with Free Custom Tailoring

The biggest hidden cost of buying a prom dress is often the alterations. At HappyProm, even our budget prom dresses come with our signature free custom-made service. By providing your exact measurements, you receive a gown that is ready to wear the moment it arrives. This "fit like a glove" promise saves you an average of £30–£60 on local tailoring, making our prom dresses under £100 the best value choice for UK students.

Reliable Service & Fast UK Shipping

HappyProm is a trusted prom store dedicated to making fashion accessible. We use premium fabrics that look and feel expensive, ensuring you feel confident on your big night. With fast delivery and a secure shopping experience, finding an affordable prom dress has never been easier. Explore our range today and discover why thousands of Year 11 and Year 13 students trust HappyProm for their milestone events.

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The spotlight of this blue plus size bridesmaid dresses for curve girls is the lace cape shape sleev..
£92.00 £88.00
Ex Tax: £88.00
With this cute bespoke dress, you are the beautiful pixie on the party, superb impressive.Silhouette..
£90.00 £80.00
Ex Tax: £80.00
Peach is the trend of wedding color, this peach color bridesmaid dress with sideling pletead to enha..
£87.00 £78.00
Ex Tax: £78.00
So cute and adorable simple style short occasion dress. You don't need to sharking yourself with the..
£88.00 £78.00
Ex Tax: £78.00
The special design of this dress is the side ruching. Layer after layer,better way to modify bottom ..
£88.00 £78.00
Ex Tax: £78.00
This lace dress is so gorgeous with open back and deep v-neck, but it also with bow knot belt and re..
£113.00 £92.00
Ex Tax: £92.00
The flowing ombre chiffon, sweetheart neckline, empire waistline, high low length, all these will ex..
£91.00
Ex Tax: £91.00
Special Keyhole one strap cross shoulder to back into two sequin straps, special and elegance,the la..
£91.00
Ex Tax: £91.00
Sequin and rhinestone decorated single straps cross between the bust area, it divide your top body i..
£87.00
Ex Tax: £87.00
Fashionable cut showed your good body figure and large areas lace revealed your sweetness, your fair..
£102.00 £91.00
Ex Tax: £91.00
The point of this cute dress is Chinese style neckline, big bowknot on the waist,so pretty, high ill..
£87.00
Ex Tax: £87.00
Turn the dancing night to be a unforgettable night with this glittery bodice short prom dress. Sequi..
£87.00
Ex Tax: £87.00
Scoop shaped neckline with large beading. Ruffled sheath figure in mini length, this dress is very s..
£102.00 £92.00
Ex Tax: £92.00
This long bridesmaid dresses is break into two pieces, white lace top and flowy chiffon skirt with s..
£97.00 £87.00
Ex Tax: £87.00
Blue color is one of the most wedding colors, it matchs most wedding themes, this long blue bridesma..
£89.00 £83.00
Ex Tax: £83.00
The point of this short prom dress is the black floral lace covered on the white organza dress, avoi..
£94.00 £94.00
Ex Tax: £94.00
Ruched sweetheart neckline,floor length with sweep train,fully lined,this Grecian formal dress accom..
£99.00
Ex Tax: £99.00
Pleated chiffon dress with crown shaped sequins, exquisite and elegance for any formal occasion.Silh..
£88.00
Ex Tax: £88.00
Chiffon straps cross at the top of bust and back,cut out back, very special design and A-line style ..
£98.00 £90.00
Ex Tax: £90.00
This wedding bridesmaid dress is simple but elegant. Criss-cross pleated top bodice with thin straps..
£87.00
Ex Tax: £87.00
Solemn navy blue chiffon prom dress, with flower shape shoulder strap, simplicity with elegance. Str..
£93.41 £83.00
Ex Tax: £83.00
This dress is so sexy with the deep V back and sweetheart neckline.Sequin and beading straps and wai..
£95.00 £89.00
Ex Tax: £89.00
V-neckline, chiffon-overlay covered sleeves, cinched waist,together with ruffled back made in pastel..
£97.75 £83.00
Ex Tax: £83.00
This gorgeous dress in chocolate color, a perfect color for fall wedding,the sepcial design at the b..
£91.00
Ex Tax: £91.00
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Deals Of The Day
Sexy Sparkly Plunging V-neck Formal Prom Dresses Slit KSP491
Deep V shape front and back show off sexy back, side slit elongate your beautiful leg,the sparkly se..
Special price:£95.00
Old price:£120.00
You save:£25.00
Beautiful Sunset Long Ombre Cape Prom Dresses KSP421
The beautiful long prom dresses in color same as sunset in maxi dress style, with this ombre prom dr..
Special price:£118.15
Old price:£128.50
You save:£10.35
Embellished Crystal Long Black Halter Straps Prom Dresses KSP541
Tons of rhinestone in various size decorated top, patterned wave shape waistline in sheer vision, jo..
Special price:£110.00
Old price:£140.00
You save:£30.00
Floral Embellished Sheer Corset Prom Gown - Sweetheart A-line Champagne Gold Tulle Gown KSP655
Make a dazzling entrance at your next big event with our KSP655 floral embellished prom gown. This s..
Special price:£138.00
Old price:£150.00
You save:£12.00
Lilac Purple Applique Corset Mermaid Prom Dresses String Back KSP632
This romantic purple tone fit and flare dresses for senior girls to their prom party. It features ro..
Special price:£127.00
Old price:£138.00
You save:£11.00
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