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.

Show:
Sort By:
So cute girls dress with jewel in shape of anchor, empire waist, knee length, no cut out, no hollow,..
£89.00
Ex Tax: £89.00
This dress is so sexy with the illusion neckline and keyhole back,show off your slim waistline with ..
£87.00 £79.00
Ex Tax: £79.00
Size Option: S, M, L;Color Option: Dark Blue, Red, Wine, Blush Pink.Silhouette: A-lineMaterial: Lace..
£60.00
Ex Tax: £60.00
Tiered skirts, add elegant movement to every step on the party, features sparkle glitter top, bag yo..
£92.00
Ex Tax: £92.00
This princess style prom dress will make your prom night, your sweet 16 party memorable. Strapless n..
£89.00
Ex Tax: £89.00
Sequin and pleated bust,mermaid style with lace up back, this dress is the ideal choice for tall,sle..
£102.00 £92.00
Ex Tax: £92.00
Rhinestone decorated lace with V shape back is the top of this beautiful dress,tunic empire waist an..
£95.00
Ex Tax: £95.00
Sequin illusion bateau neckline, cut out back, pleated bust, this dress is so gorgeous for junior an..
£94.00 £87.00
Ex Tax: £87.00
This short tulle princess dress is so charming, you will look very cute on the party, if you are pea..
£97.00
Ex Tax: £97.00
Special sequined plunge neckline, bow knot sash belt, sexy and fashion for girls to the special soci..
£98.60
Ex Tax: £98.60
cute lace covered top, special keyhole back wit tie up, this dress is so girly,best choice for prom ..
£84.00
Ex Tax: £84.00
Sexy but not flirty,beautiful and elegant, in fresh color, simple style with little decoration, like..
£88.05
Ex Tax: £88.05
This green prom dresses is in retro style buttons back, white lace covered top, tulle skirt flare fr..
£84.00
Ex Tax: £84.00
3-D flowers embellished halter neckline, fresh and elegant; flower shape lace, beading and rhineston..
£88.00
Ex Tax: £88.00
Criss-cross pleated design top together with tank straps, chic yet comfortable to wear. A-line silho..
£92.00 £87.00
Ex Tax: £87.00
This neutral gray color bridesmaid dress is divide with two parts by a sash belt,lace top, flare chi..
£100.00 £87.00
Ex Tax: £87.00
Keyhole top of bust, halter straps with open back, knee length skirt,a understated sexy for junior g..
£117.00 £92.00
Ex Tax: £92.00
Beautiful flowers blossom open at the waist, skirt flare out from waist, lace up back,more convertib..
£99.00 £89.00
Ex Tax: £89.00
Pastel pink color, the new color trends of this year,rhinestone sweetheart neckline, pleated bust,la..
£87.00
Ex Tax: £87.00
What is your first sight of this dress? Elegant, of course it is so elegant, and beautiful. High ill..
£92.00
Ex Tax: £92.00
V-neck floral lace top in fake illusion, sexy in low-key and safe same time.Silhouette: A-lineMateri..
£97.00 £91.00
Ex Tax: £91.00
You will love this dress at your first eyes and your friends and family too, it is so sparkle and gl..
£102.00
Ex Tax: £102.00
Applique lace top, two pieces silhouette show off waist curve and cover belly perfect, create perfec..
£87.00
Ex Tax: £87.00
The key point of this dress is high-key,sparkle your beautiful. High illusion sweetheart, water..
£89.00
Ex Tax: £89.00
Showing 97 to 120 of 514 (22 Pages)
Deals Of The Day
Sexy Sparkly Plunging V-Neck Dark Grey Prom Dress with Slit KSP491
Embrace Modern Sophistication in Our Dark Grey Sparkly GownRedefine evening glamour with the KSP491...
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
Black Crystal Embellished Halter A-Line Prom Dress KSP541
Step Into Elegance with Our Crystal Halter A-Line GownDiscover the perfect blend of modern sparkle a..
Special price:£119.00
Old price:£140.00
You save:£21.00
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 Dress KSP632
Define Your Curves in Our Lilac Applique Mermaid GownMake an unforgettable entrance with the KSP632...
Special price:£127.00
Old price:£138.00
You save:£11.00
Happyprom © 2026