7 Easy Last-Minute Halloween Costumes You Can Thrift for Under $20

From spooky to stylish, these thrifted looks prove that creativity—not cost—is what makes a great costume.

Running out of time before Halloween? Don’t panic—just pop into your local Goodwill! Whether you’re channeling your favorite cartoon character, turning everyday finds into clever DIYs, or going full glam with a movie-inspired look, there’s no shortage of thrifty costume inspiration waiting on the racks.

These quick and easy ideas (all under $20!) show that with a little imagination—and maybe a few thrifted treasures—you can create a costume that’s affordable, unique, and totally unforgettable.

Five Easy Costumes Under $20

(Embedded Video: 5 Easy Costumes Under $20 – YouTube Shorts)

Influencer Ashley Gross @ewdatsgross hits Goodwill to prove that Halloween creativity doesn’t need a big budget. Armed with thrifted finds and a little imagination, she pulls together five fun looks in no time:

🕵️ Kim Possible – Thrifted cargo pants + gloves = hero mode activated.

🌊 Snorkeler – A thrifted snorkel kit makes for a hilarious underwater look.

🧻 Mummy – A roll of crepe paper and a white dress? Classic and creepy.

😈 Spooky Chic – One black dress, one scary mask, and instant haunting glam.

🐭 “I’m a Mouse, Duh!” – The same black dress plus thrifted mouse ears = iconic Mean Girls energy.

💡 Thrift Tip: Start with one versatile base piece (like a black dress or khakis), then build from there with accessories, props, or repurposed finds.

DIY Mad Scientist Costume

Get ready to mix a little chaos into your Halloween look. This video shows how to create a Mad Scientist costume using thrifted lab coats, safety goggles, and wild makeup. It’s perfect for both kids and adults who love an eccentric, over-the-top vibe—and the best part is, most of it can be found in the home goods or Halloween section at Goodwill!

The Effie Trinket Transformation

Channel Capitol couture with a Hunger Games–inspired Effie Trinket look. This glam costume combines bold makeup, statement accessories, and dramatic color—all achievable with a few thrifted pieces. Look for floral patterns, structured jackets, or eye-catching fascinators to bring Effie’s iconic style to life.

💄 Makeup Hack: Add pops of metallic shadow and dramatic lashes to tie the whole look together.

Whether you’re dressing up as a cartoon hero, a mad scientist, or a glamorous movie icon, Goodwill has all the pieces you need to create a costume that’s uniquely yours. Every thrifted purchase helps support job training and community programs—so you’re doing good while looking great.

Visit your local Goodwill today and bring your Halloween vision to life!