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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This dress is very Sophisticated,pleated drapes with embroidery,decorated the embroidery with sequin..
£112.00 £99.00
Ex Tax: £99.00
Classic strapless prom dresses style. The point of this dress is the top,sequin sweetheart chest are..
£103.00 £91.00
Ex Tax: £91.00
Soft pink prom dress, v-neckline, front and symmetry. In addition to the beautiful waist beads, more..
£108.61 £99.00
Ex Tax: £99.00
The whole dress without beading decoration, but stacked chest fold design, which is very unique to t..
£89.06 £80.00
Ex Tax: £80.00
This flowing prom dress is so elegant and pretty temperament.You will look like Greek Goddess in the..
£98.00
Ex Tax: £98.00
This special designed prom dress is made of taffeta and Georgette. Sheath style on the top bodice an..
£99.00 £90.00
Ex Tax: £90.00
Special design oblique wrapped upper bodice extend to shoulder,sequined waistline, you are the godde..
£107.00 £95.00
Ex Tax: £95.00
A flower decorated one shoulder,a prominent waistline and a train in a line style, this dress is cla..
£103.00 £88.00
Ex Tax: £88.00
Strapless top, flounced skirt bottom,with a big floral at the bottom, this dress can improve your fi..
£110.00 £99.00
Ex Tax: £99.00
This fresh pink prom dress design is simple, but very classic.You can custom the color and size free..
£97.75 £89.00
Ex Tax: £89.00
This cute prom dress is mainly made ​​of soft white tulle.Waist design is the color contrasting fabr..
£89.86 £78.00
Ex Tax: £78.00
This red floor-length chiffon dress is flowing as the wind. You can custom the colors and size. The ..
£104.27 £87.00
Ex Tax: £87.00
Sideline draped,sheath style and spaghetti strap, everything is designed together to show off your p..
£97.00 £84.00
Ex Tax: £84.00
The hand sew sequin and beading accented the sweetheart neckline in the floral pattern as same as th..
£108.00
Ex Tax: £108.00
Romantic violet prom dress, especially for this season. Elegant chiffon fabrics, coupled with chest ..
£108.61 £92.00
Ex Tax: £92.00
This cute little white dress with ruched sequin waistline and layer skirt, suitable for prom season,..
£86.00
Ex Tax: £86.00
Hemline blast away from the waist,three layer at the skirt.Flower at the chest area make this dress ..
£93.00
Ex Tax: £93.00
Bright blue tulle layered outside,a highlight waist,print leopard with flower decorated one shoulder..
£105.00 £93.00
Ex Tax: £93.00
Sequin and Jeweled sew full of the dress, backless in mini length, this party dress is glitter and b..
£85.00
Ex Tax: £85.00
Soft pink with pleated strapless top,Ziggy shaped black lace belt,down to floor skirt, this dress is..
£98.00 £89.00
Ex Tax: £89.00
The spotlight of this bridesmaid dress is the flowers on the belt.It gives life to the dress, it mak..
£80.00
Ex Tax: £80.00
Empire waist and wide belt decorated cocktail prom dress or baby doll dress.Elegant sweet bowknot is..
£93.41 £85.00
Ex Tax: £85.00
This beaded sweetheart prom dress featuring a sweetheart neckline with beaded halter straps and a fi..
£108.61 £94.00
Ex Tax: £94.00
A look and feel that your bridesmaids must will love, this amazing strapless long and flowy chiffon ..
£89.06 £86.00
Ex Tax: £86.00
Showing 385 to 408 of 511 (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
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