COS promo codes - 15% OFF for September 2025
Save with our 5 verified COS promo codes and coupons on dresses, pants, and t-shirts today.

Our page is dedicated to COS promo codes for US shoppers. For UK shoppers, go to our sister-site for COS discount codes on Marie Claire UK.
FAQs
Is there free shipping at COS?
Yes, you can get free economy US shipping on orders over $150. If your order is less than this, economy shipping costs $5 or standard shipping is $10.
How can I get a COS first order code?
COS offers 10% off your first order when you sign up to the brand's email newsletter. As savings editors, we're also loving that there is no minimum spend needed for this discount.
How often does COS have sales?
COS regularly has sales at the end of each season to help you save on designer clothing. We've previously seen 25% off designer womenswear and menswear on key dates. Be sure to sign up for the COS email newsletter for sales updates first.
Does COS offer a student discount?
Yes, students can save 10% off COS online orders. You'll need to log into Student Beans to verify your education status, then COS will send your code.
What is the COS return policy?
COS accepts returns within 30 days from the day you order. Your items should be returned undamaged, unworn, and with any tags still attached for a complete refund. COS will deduct a $7 return fee from your refund total, if you use the pre-paid label.
Hints and Tips
Shop the sale: Elevate your outfits for less by shopping the COS seasonal sales. Our savings editors have previously seen up to 60% off women's pieces during these sales. These are often limited-time sales so it's always worth checking the discounts before they stop.
Newsletter promotions: COS will send you exclusive promotions and sales updates first with the brand's email newsletter. As we've mentioned, there's also a 10% off discount on your first order at COS. Sign us up!
COS x ThredUp: Get COS credit for your pre-loved pieces. COS is collaborating with ThredUp to help keep clothing out of landfills. You can return your 'gently used' clothing with ThredUp by activating a kit or requesting a label.
Competitions: Last year, COS had a 'Win a wardrobe' competition for US shoppers with no purchase required. All shoppers needed to do was complete an online form. Be sure to follow the brand on social media for any future competitions.
How to use your COS coupon code
- Select one of our COS coupon codes on this page and copy it to your clipboard.
- Click the “View at COS” button to be taken to the website.
- Add your products to your basket.
- Click on the shopping basket button to be taken to the checkout page.
- Add in your shipping details such as your name, address, and preferred delivery method.
- Look for the “Promo code” box where you can paste your COS coupon code.
- Click 'Apply' and your discount will be applied to the total.
How we source our codes
At Marie Claire, we have a dedicated team of deal experts, commercial colleagues, and editors who find and negotiate the best promo codes and coupons, as well as produce content aiming to help you shop affordably.
We have a dedicated team of 3 deal experts that are constantly sourcing and testing coupons and promo codes for some of the biggest retailers in fashion, beauty, and beyond to list on our website. They also work with affiliate networks to get a heads-up on future deals and discounts. This means we can update our pages
Meanwhile, our commercial colleagues are key to keeping good relationships with retailers. Their experience with lifestyle vouchers helps them to negotiate the best promo codes and exclusives for you.
On the pages themselves, you’ll find carefully researched saving information for all your beauty, lifestyle, and fashion purchases. Our contributing editors have years of experience in the industry and consistently update the page to reflect new ways to save. You’ll find helpful discount FAQs and saving tips which are checked and verified regularly.
What if my promo code doesn’t work?
- Trying the code and checking if they are valid ourselves.
- Check we don’t have any unique, one-use codes.
- Looking at the offer conditions to make sure you’ve got all the information.
However, there are occasions when details change or the codes may expire without us knowing. If this happens, be sure to contact us by emailing coupons.marieclaire@futurenet.com so we know.
How do we make money?
It’s completely free for customers to use the coupon codes we have above. We’ll get a small percentage of the money spent as a commission from the retailer you shop at. As with most businesses, we do need to make money however this will never impact the price you pay. The brand will give us a small share of the profit for connecting you to them. This helps us keep going whilst saving you more money.
Simply put, the retailer makes a sale, we get a commission, and you get a discount.

Gabriella Onessimo (she/her) is a New York City-based fashion writer, journalist, and occasional stylist. She studied Journalism + Design and Fashion Communication at The New School, graduating in late 2022. She has been rigorously writing since—and wouldn't have it any other way! You can find more of Gabriella's words in L'Officiel USA, CR Fashion Book, and more.
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About COS
Modern fashion brand Collection of Style is best known as COS. About 15 years ago, the H&M group first started COS to create effortless, minimal fashion for men, women, and kids. From tailored suits to crossbody bags, COS focuses on everyday essentials and key pieces that truly work for your wardrobe—saving you time and money. COS also has seasonal sales and exclusive discounts for fashion lovers who want to discover high-end clothing at an affordable price. Snap up a bargain today and transform your wardrobe for less with one of our COS promo codes and expert savings tips and tricks. This page has verified and working COS coupons for our US shoppers. Our sister-site is perfect for UK shoppers with its COS discount codes on Marie Claire UK.
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Gabriella Onessimo (she/her) is a New York City-based fashion writer, journalist, and occasional stylist. She studied Journalism + Design and Fashion Communication at The New School, graduating in late 2022. She has been rigorously writing since—and wouldn't have it any other way! You can find more of Gabriella's words in L'Officiel USA, CR Fashion Book, and more.