Halloween Costume Deals 2026: Up to 70% Off for Kids, Adults and Pets
Julianne Bellew is a digital creator covering beauty, makeup, kitchen, baking, and cooking. She enjoys discovering useful products, everyday favorites, and worthwhile deals that help readers shop smarter for their beauty routines and kitchens.
Article summary
Halloween is six weeks out and costume stock is at its best right now. Koupon.ai verified ten costumes on 22 September 2026 — up to 70% off for kids, adults and pets, with pet costumes from $6.49. Nine of the ten come with a one-tap promo code.
Halloween Costume Deals 2026: Up to 70% Off for Kids, Adults and Pets
Koupon.ai has verified halloween costume deals for Halloween 2026, led by a kids' full-body zentai suit at $14.99 — 70% off its $49.96 list price, checked 22 September 2026. Halloween lands in six weeks and costume stock is at its best right now, before the picked-over first week of October. These halloween costume deals cover kids, adults and pets, and nine of the ten come with a promo code you copy in one tap on the deal page.
Halloween costume deals: this week's picks for kids and adults:
Four costumes for people, starting at $11.99. Every price came off the live product page today — if you are building a group look, the whole set fits inside our deals under $20 range.
Kids orange full-body zentai suit — $14.99, 70% off:
The deepest discount on the list. Down from $49.96 with code U55UCBJW. A full-body suit is the cheapest route to a dozen different characters, and kids can move in it all night.
Minetom inflatable LED T-Rex costume for adults — $17.49, 65% off:
The office-party winner. Inflatable, LED-lit, cut from $49.99 with code VK4FQ5XQ. Under $20 for a costume people actually remember.
Kids onesie costume pajamas — $14.99, 55% off:
Down from $32.99, and the only pick here with no code needed — the discount is already applied at Amazon. Doubles as pajamas for the rest of the winter, which is the real argument for it.
Women's skeleton print gothic maxi dress — $11.99, 54% off:
The cheapest adult costume on the list at $11.99 with code 4C6L0Z9L, down from $25.98. Short sleeve, full length, and it passes as a regular dress — see more in women's clothing deals.
Pet halloween costume deals under $10:
Six NACOCO pet costumes, every one of them at half price or better, and all under $10. This is where the list gets genuinely cheap — they all sit inside deals under $10.
NACOCO cowboy rider dog costume — $7.99, 53% off:
The knight-and-doll illusion costume, down from $16.99 with code FONRH7A4. Reliably the funniest one on a walk.
NACOCO knife doll pet costume — $6.99, 53% off:
$6.99 with code DQJJKIS0, down from $14.99. Fits cats as well as dogs.
NACOCO nurse costume for dogs and cats — $6.49, 50% off:
Half off $12.99 with code XC0W3INC.
NACOCO shark hoodie pet costume — $8.49, 50% off:
Down from $16.99 with code 6FL7JMWJ. Warm enough to keep wearing past October, which is more than most costumes manage.
NACOCO pet shark costume coat — $8.49, 50% off:
The lined version, half off $16.99 with code LTF7Q4AU.
NACOCO pirate pet costume — $6.49, 50% off:
$6.49 with code A9KEH6OV, down from $12.99. Sized XS, so check your pet against the chart before ordering — and browse pet supply deals for treats to go with it.
How to claim these halloween costume deals:
Nine of these ten need a code, and the code lives on Koupon rather than the Amazon listing. Our how to use a promo code guide covers what to do if one will not apply.
- Open the deal you want on Koupon.ai and tap Copy code — the code lands on your clipboard automatically.
- Tap Get deal on Amazon to jump straight to that product page.
- Add the item to your cart and head to checkout.
- Paste the code into the promo code box. The discount shows up in your order total before you pay.
🔹 Pro Tip: costume sizing runs small across the board, pet sizes especially. Measure first, order one size up if you are between sizes, and give yourself a return window — after mid-October the reorder clock gets tight.
Which costume saves you the most:
The kids' zentai suit wins on percentage at 70% off. On flat price, the pet costumes are unbeatable — six of them at $6.49 to $8.49, so a whole household of pets costs less than one adult costume. If you only buy one thing on this page, the inflatable T-Rex at $17.49 is the one that gets photographed.
Why to buy costumes now, not in October:
Halloween is 31 October and the pattern repeats every year: sizes go first, then the codes stop applying, then the price quietly climbs through the last two weeks. Kids halloween costume sizes and pet halloween costume smalls are always the first to disappear. Buying six weeks out is how you get both the size you want and the discount — the same logic runs through our Amazon promo codes hub all season.
For more verified halloween costume deals like these, browse the trending deals page or the Amazon promo codes hub, and get the Koupon app for alerts when new halloween costume deals land. We re-check every price on this list daily through the end of October.
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