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 satin short graduate prom party dress features off shoulder neckline, illusion V-neckline and l..
£89.00
Ex Tax: £89.00
This style bridesmaid dresses have the classic strapless,flowy flattering figure, you will look like..
£92.00 £86.00
Ex Tax: £86.00
Simple Aline style with no more decoration, just to show off the natural curve body shape by the spe..
£83.00
Ex Tax: £83.00
Halter top features pattern pleates, high illusion back with keyhole cut, slim waist design, full le..
£91.00
Ex Tax: £91.00
Embellished top with halter neckline, sequin decorated waistline and open back, aline silhouette, th..
£98.00
Ex Tax: £98.00
Illusion cap sleeves with applique trim, white applique on the top make this prom dress more feminin..
£89.00
Ex Tax: £89.00
This cocktail bridesmaid dresses featuring a illusion round neckline and fitted silhouette in knee l..
£87.00 £82.00
Ex Tax: £82.00
This wedding bridesmaid dress is simple but elegant. Criss-cross pleated top bodice with thin straps..
£94.00 £92.00
Ex Tax: £92.00
No matter what you are want to conceal, like big arms, belly or short legs, this cute Aline sexy dre..
£80.00
Ex Tax: £80.00
This open back floor length evening dress features plenty of crystal rhinestone, red beadings and se..
£110.00 £97.00
Ex Tax: £97.00
Crosses pleated at the bust area to plump up your chest. With the help of lace round neckline expose..
£115.00 £99.00
Ex Tax: £99.00
This wedding bridesmaid dress is simple but elegant. Criss-cross pleated top bodice with thin straps..
£92.00 £87.00
Ex Tax: £87.00
This Greek Goddess style short prom dress is special with the empire braid belt and pleated one shou..
£106.47 £85.00
Ex Tax: £85.00
You will be sure to carch eyes at homecoming in this ultra-chic dress!.Thousand of colorful beads sh..
£108.61 £98.00
Ex Tax: £98.00
Exquisite criss-cross pleated on the bust, shining diamond belt divide the top and skirt,lace up bac..
£85.00
Ex Tax: £85.00
Aline is the best silhouette for everybody shape, coral pink is the better color choice for fair ski..
£87.00
Ex Tax: £87.00
Red prom dress, representing passionate. Tailoring is very unique. This section is the shoulder dres..
£115.13 £99.00
Ex Tax: £99.00
This cute retro LBD looks like the early Dior classic style. Your neck and collarbone will look gorg..
£88.00
Ex Tax: £88.00
This vintage style LBD for both girls and woman. The single shoulder decorated with big bowknot, nif..
£92.00
Ex Tax: £92.00
Blue and white color are all quiet color, they two together emphasis your elegance,tunic waistline,f..
£91.00
Ex Tax: £91.00
Crafted Pleated Empire Waist silhouette, this dress works well with any body shape. And the wide str..
£87.00
Ex Tax: £87.00
No matter your bridesmaids are adult or junior, this dresses are both perfect for them.Most of impor..
£76.00
Ex Tax: £76.00
Classic design knee length bridesmaid dresses plus a different color belt,this dress is so cute.Silh..
£94.00 £80.00
Ex Tax: £80.00
This red graduation dress with lace up top and ball gown silhouette, you will look very pretty and c..
£84.00
Ex Tax: £84.00
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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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