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Formal Dresses Under $400 Australia – Designer Prom Gowns

Shop formal dresses under $400 in Australia — discover an extensive selection of designer prom gowns, school formal dresses and evening styles within a $400 budget at One Honey Boutique.

Explore statement formalwear across fitted, corset, A-line, mermaid and ball gown silhouettes, with styles from leading Australian and international designers.

From sleek satin and sparkling embellishments to structured corsetry and dramatic silhouettes, find an unforgettable formal look while shopping within your budget.

Explore Formal Dresses Under $400

Searching for formal dresses under $400 in Australia? One Honey Boutique brings together an extensive edit of prom dresses, school formal gowns and eveningwear currently priced below $400, making it easier to discover your perfect dress within budget.

Shop for Year 10 and Year 12 formal, prom, graduation, balls, weddings, galas and special occasions across fitted, A-line, mermaid, corset and statement gown silhouettes.

Within a $400 budget, discover even more of the One Honey designer range, including satin gowns, sparkling styles, structured bodices, lace details, embellishments and trend-led formalwear across an evolving selection of colours and sizes.

Shopping within a lower price range? Explore our formal dresses under $300 for styles within the previous budget tier.

Want to unlock an even wider designer selection? Continue to our formal dresses under $500 collection for more prom, school formal and evening gown options.

Looking specifically for discounted gowns? Browse our formal dress sale for reduced prom, school formal and evening dresses across multiple price points.

For our complete formalwear edit, explore formal dresses Australia, shop prom dresses or discover our evening dresses.

Prices, sizes and availability can change as products sell through, new gowns arrive or pricing changes. Always check the individual product page for the current price, size options and availability.

Shopping for your school formal? Australia's Largest Dress Register helps protect the exclusivity of eligible registered One Honey gowns for participating school formals and events.

Proudly Australian owned since 2011 with over 1,000+ 5-star reviews, One Honey Boutique is a trusted destination for designer prom, school formal and occasion wear.

Need help with sizing, ordering or planning around your event date? Visit our Help Centre for shopping support.

Shop with flexible payment options including AfterPay & Zip.

Discover formal dresses under $400 at One Honey Boutique — designer prom, school formal and evening gowns for an unforgettable look within your budget.

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VISIT OUR GOLD COAST STORE TO TRY ONDISCONTINUED LAST SIZES AVAILABLEUSA SIZE S - LSave 60%Honey Couture VANESSA Bodycon Side Split Midi Semi Formal Dress in Australia | One Honey Boutique
VANESSA Bodycon Side Split Midi Semi Formal Dress Sale priceFrom $99.00 AUD Regular price$249.95 AUD
Color
VISIT OUR GOLD COAST STORE TO TRY ONDISCONTINUED FINAL SIZES AVAILABLEUSA SIZE XS - 3XLSave 78%Honey Couture MILEE Low Back Mermaid Evening Gown Dress with Leg Split in Australia | One Honey Boutique
Honey Couture MILEE Low Back Mermaid Evening Gown Dress with Leg Split Sale priceFrom $99.00 AUD Regular price$449.95 AUD
Color
VISIT OUR GOLD COAST STORE TO TRY ONDISCONTINUED FINAL SIZES AVAILABLEUSA SIZE XS - 3XLSave 30%Honey Couture MILEE Low Back Mermaid Evening Gown Dress in Australia | One Honey Boutique
Honey Couture MILEE Low Back Mermaid Evening Gown Dress Sale priceFrom $99.00 AUD Regular price$449.95 AUD
Color
AUS SIZE XS - XXLVISIT OUR GOLD COAST STORE TO TRY ONSold outRunaway The Label MARGOT Bridesmaids Semi Formal Maxi Dress in Australia | One Honey Boutique
Runaway The Label MARGOT Bridesmaids Semi Formal Maxi Dress Sale price$159.95 AUD
Color
AUS SIZE XS - XXLVISIT OUR GOLD COAST STORE TO TRY ONSold outRunaway The Label DELILAH Bridesmaids Semi Formal Maxi Dress in Australia | One Honey Boutique
Runaway The Label DELILAH Bridesmaids Semi Formal Maxi Dress Sale price$159.95 AUD
Color
VIRAL ON TIKTOK 5.5MILLION VIEWSIN STOCKDISCONTINUED FINAL SIZES AVAILABLESALESold outOn saleHoney Couture MYORA Embellished Bustier Satin Mermaid Formal Dress in Australia | One Honey Boutique
Honey Couture MYORA Embellished Bustier Satin Mermaid Formal Dress Sale priceFrom $99.00 AUD Regular price$599.95 AUD
Color
VISIT OUR GOLD COAST STORE TO TRY ONUSA SIZE XS - 3XLSave 0%XENA Silky Tie Up A - Line Formal Bridesmaid & Formal Dress in Australia | One Honey Boutique
XENA Silky Tie Up A-Line Formal Bridesmaid & Formal Dress Sale priceFrom $199.98 AUD Regular price$399.95 AUD
Color
USA SIZE 2 - 16SHIVA Strapless Satin Fitting Corset Lace Up Prom & Formal Dress in Australia | One Honey Boutique
SHIVA Strapless Satin Fitting Corset Lace Up Prom & Formal Dress Sale price$399.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 11%Honey Couture MILEE Copper Low Back Mermaid Formal Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Copper Low Back Mermaid Formal Dress (RED TAG FINAL SALE) Sale price$399.95 AUD Regular price$449.95 AUD
Color
IN STOCKSALESave 22%ZENDAYA Satin Corset Bustier Leg Split School Formal Bridesmaid Dress in Australia | One Honey Boutique
Honey Couture ZENDAYA Emerald Green Satin Corset Bustier Leg Split Formal Dress (RED TAG FINAL SALE) Sale price$359.95 AUD Regular price$459.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE 2XS - 2XLMC Chic ELAYNA Pale Blue Satin Corset Bustier Leg Split Formal Dress in Australia | One Honey Boutique
MC Chic ELAYNA Pale Blue Satin Corset Bustier Leg Split Formal Dress Sale price$399.95 AUD
Color
Sold outMC Chic ELAYNA Pink Satin Corset Bustier Leg Split Formal Dress in Australia | One Honey Boutique
MC Chic ELAYNA Pink Satin Corset Bustier Leg Split Formal Dress Sale priceFrom $369.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE 2XS - 2XLMC Chic PRISA Peri Satin Strapless Corset Bustier Leg Split Formal Dress in Australia | One Honey Boutique
MC Chic PRISA Peri Satin Strapless Corset Bustier Leg Split Formal Dress Sale price$399.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE 2XS - 2XLMC Chic ZAYDA Red Satin Corset Bustier Leg Split Formal Dress in Australia | One Honey Boutique
MC Chic ZAYDA Red Satin Corset Bustier Leg Split Formal Dress Sale price$399.95 AUD
Color
VISIT OUR GOLD COAST STORE TO TRY ONDISCONTINUED LAST SIZES AVAILABLEAUS SIZE 6 - 18Sold outSave 83%Honey Couture CLAUDIA Navy Sequin Mermaid Formal Gown in Australia | One Honey Boutique
Honey Couture CLAUDIA Navy Sequin Mermaid Formal Gown Sale priceFrom $99.00 AUD Regular price$569.95 AUD
Color
IN STOCKDISCONTINUEDSALESold outSave 78%Honey Couture MILEE Baby Pink Low Back Mermaid Evening Gown Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Baby Pink Low Back Mermaid Evening Gown Dress (RED TAG FINAL SALE) Sale price$99.95 AUD Regular price$449.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 30%Honey Couture MILEE Baby Blue Low Back Mermaid Evening Gown Dress w Leg Split (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Baby Blue Low Back Mermaid Evening Gown Dress w Leg Split (RED TAG FINAL SALE) Sale price$314.95 AUD Regular price$449.95 AUD
Color
IN STOCKDISCONTINUEDSALESold outSave 72%Honey Couture EVELYN Blue Silky Slip Formal Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture EVELYN Blue Silky Slip Formal Dress (RED TAG FINAL SALE) Sale price$99.00 AUD Regular price$349.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 30%Honey Couture MILEE Emerald Green Low Back Mermaid Evening Gown Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Emerald Green Low Back Mermaid Evening Gown Dress (RED TAG FINAL SALE) Sale price$314.95 AUD Regular price$449.95 AUD
Color
IN STOCKDISCONTINUEDSALESold outSave 30%Honey Couture MILEE Metallic Orange Low Back Mermaid Evening Gown Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Metallic Orange Low Back Mermaid Evening Gown Dress (RED TAG FINAL SALE) Sale price$314.95 AUD Regular price$449.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 30%Honey Couture MILEE Lilac Purple Low Back Mermaid Dress w Leg Split (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Lilac Purple Low Back Mermaid Dress w Leg Split (RED TAG FINAL SALE) Sale price$314.95 AUD Regular price$449.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 30%Honey Couture MILEE Yellow Low Back Mermaid Evening Gown Dress w Leg Split (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture MILEE Yellow Low Back Mermaid Evening Gown Dress w Leg Split (RED TAG FINAL SALE) Sale price$314.95 AUD Regular price$449.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 11%Honey Couture IMOGEN Baby Blue Low Back Mermaid Formal Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture IMOGEN Baby Blue Low Back Mermaid Formal Dress (RED TAG FINAL SALE) Sale price$399.95 AUD Regular price$449.95 AUD
Color
IN STOCKSALESave 12%HUNTAR Silky Ruched Front Cross Over Bust Bridesmaid Formal Dress in Australia | One Honey Boutique
Honey Couture HUNTAR Sage Green Silky A Line Bridesmaid Formal Dress (RED TAG FINAL SALE) Sale price$379.95 AUD Regular price$429.95 AUD
Color
IN STOCKSALESave 12%Honey Couture HUNTAR Dusty Blue Green Silky A Line Bridesmaid Formal Dress (RED TAG FINAL SALE) in Australia | One Honey Boutique
Honey Couture HUNTAR Dusty Blue Green Silky A Line Bridesmaid Formal Dress (RED TAG FINAL SALE) Sale price$379.95 AUD Regular price$429.95 AUD
Color
USA SIZE XS - LHoney Couture BARCELONA Platinum Sequin Long Sleeve Cowl Neckline Midi Dress in Australia | One Honey Boutique
Honey Couture BARCELONA Platinum Sequin Long Sleeve Cowl Neckline Midi Dress Sale price$249.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE 4 - 10Honey Couture ESTELLA Black Silky Circle Skirt Mini Party Dress in Australia | One Honey Boutique
Honey Couture ESTELLA Black Silky Circle Skirt Mini Party Dress Sale priceFrom $199.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE XS - 3XLAMBROSIA Blush Sequin Beaded Strap Tulle Frilly Party Dress in Australia | One Honey Boutique
AMBROSIA Blush Sequin Beaded Strap Tulle Frilly Party Dress Sale priceFrom $249.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE XS - 3XLERIN Smokey Blue Sequin V Front Tulle Frilly Party Dress in Australia | One Honey Boutique
ERIN Smokey Blue Sequin V Front Tulle Frilly Party Dress Sale priceFrom $249.95 AUD
Color
ONLINE EXCLUSIVEUSA SIZE 4 - 16Save 60%Honey Couture ENVY Glitter Feather Off Shoulder Midi Dress in Australia | One Honey Boutique
ENVY Glitter Feather Off Shoulder Midi Dress Sale price$199.95 AUD Regular price$499.95 AUD
Color
USA SIZE XS - XLDISCONTINUEDHoney Couture ELLIE Gold Silky Cut Out Maxi Dress in Australia | One Honey Boutique
Honey Couture ELLIE Gold Silky Cut Out Maxi Dress Sale price$349.95 AUD
Color
AUS SIZE 6 - 16Save 30%Honey Couture DITA Black Lace Up Corset Mermaid Formal Dress in Australia | One Honey Boutique
Honey Couture DITA Black Lace Up Corset Mermaid Formal Dress Sale priceFrom $321.96 AUD Regular price$459.95 AUD
Color
VISIT OUR GOLD COAST STORE TO TRY ONDISCONTINUED LAST SIZES AVILABLEUSA SIZE S - XLSave 78%Honey Couture GENENE Rose Gold Thin Strap Sequin Formal Dress in Australia | One Honey Boutique
Honey Couture GENENE Rose Gold Thin Strap Sequin Formal Dress Sale priceFrom $99.00 AUD Regular price$459.95 AUD
Color
USA SIZE XS - XLDISCONTINUED FINAL SIZES AVAILABLEHoney Couture MILEE Emerald Green Low Back Midi Dress in Australia | One Honey Boutique
Honey Couture MILEE Emerald Green Low Back Midi Dress Sale price$199.95 AUD
Color
USA SIZE XS - MSold outSave 0%Honey Couture CLEO Black & Gold Beaded Formal Gown in Australia | One Honey Boutique
Honey Couture CLEO Black & Gold Beaded Formal Gown Sale priceFrom $299.95 AUD Regular price$599.95 AUD
Color
USA SIZE XS - LHoney Couture SAMARA Knot Feature Low Back Silky Mermaid Formal Gown in Australia | One Honey Boutique
Honey Couture SAMARA Knot Feature Low Back Silky Mermaid Formal Gown Sale price$399.95 AUD
Color
USA SIZE XS - LHoney Couture SIBYLLE Burgundy Silky Mermaid Formal Dress in Australia | One Honey Boutique
Honey Couture SIBYLLE Burgundy Silky Mermaid Formal Dress Sale price$399.95 AUD
Color
USA SIZE XS - LHoney Couture SIBYLLE Emerald Green Silky Mermaid Formal Dress in Australia | One Honey Boutique
Honey Couture SIBYLLE Emerald Green Silky Mermaid Formal Dress Sale price$399.95 AUD
Color
USA SIZE XS - LDISCONTINUEDHoney Couture RIKKI Green Open Lace Up Back Formal Dress in Australia | One Honey Boutique
Honey Couture RIKKI Green Open Lace Up Back Formal Dress Sale price$399.95 AUD
Color
USA SIZE XS - LSave 75%Honey Couture ISLA Navy Blue Beaded Lace Bust Formal Dress in Australia | One Honey Boutique
Honey Couture ISLA Beaded Lace Bust Formal Dress Sale price$99.95 AUD Regular price$395.95 AUD
Color
IN STOCKDISCONTINUEDSALESave 30%Honey Couture EVITA White Nude Strapless Sequin Wedding Formal Dress in Australia | One Honey Boutique
Honey Couture EVITA White Nude Strapless Sequin Wedding Formal Dress Sale priceFrom $370.80 AUD Regular price$529.95 AUD
Color
Save 31%Honey Couture JESSY Lace Summer Dress in Australia | One Honey Boutique
Honey Couture JESSY Lace Summer Dress Sale price$89.95 AUD Regular price$129.95 AUD
Color
Save 20%Label of Love White Tiger Animal Print Drawstring Maxi Dress in Australia | One Honey Boutique
Label of Love White Tiger Animal Print Drawstring Maxi Dress Sale price$79.95 AUD Regular price$99.95 AUD
Color
AUS SIZE 4 - 18 Tina Holly Couture Connelly R1767 White Off Shoulder Bridesmaids Midi Dress in Australia | One Honey Boutique
Tina Holly Couture Connelly R1767 White Off Shoulder Bridesmaids Midi Dress Sale priceFrom $299.95 AUD
Color
AUS SIZE 2 - 24Tina Holly Couture Connelly R1767 Heather Grey Off Shoulder Bridesmaids Midi Dress in Australia | One Honey Boutique
Tina Holly Couture Connelly R1767 Heather Grey Off Shoulder Bridesmaids Midi Dress Sale priceFrom $399.95 AUD
Color
AUS SIZE 2 - 24Tina Holly Couture Connelly R1767 Pink Off Shoulder Bridesmaids Midi Dress in Australia | One Honey Boutique
Tina Holly Couture Connelly R1767 Pink Off Shoulder Bridesmaids Midi Dress Sale priceFrom $399.95 AUD
Color
AUS SIZE 2 - 24Tina Holly Couture Connelly R1767 Navy Blue Off Shoulder Bridesmaids Midi Dress in Australia | One Honey Boutique
Tina Holly Couture Connelly R1767 Navy Blue Off Shoulder Bridesmaids Midi Dress Sale priceFrom $399.95 AUD
Color
VISIT OUR GOLD COAST STORE TO TRY ONDISCONTINUED LAST SIZES AVAILABLEUSA SIZE 6 - 18Sold outOn saleHoney Couture SERENA Blue Strapless Mermaid Formal Dress in Australia | One Honey Boutique
Honey Couture SERENA Blue Strapless Mermaid Formal Dress Sale priceFrom $99.00 AUD Regular price$699.95 AUD
Color

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Formal Dresses Under $400 Australia

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