COS Coupon Codes

Discover the latest COS voucher codes and deals, updated 24 September 2026

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Codes

Deals

Verified

Today's Top COS Offers

10% Off
COSPromo
10% off Your First Order
Verified
Last used 11 hours ago
*see terms
Details
Offer details: Register for the COS newsletter to receive a welcome code. It is best to use this on high-value full-price essentials since it is a one-time use offer
Terms:
Valid for new subscribers only. Applies to full-price items on the first order
15% Off
COSPromo
15% off for Students
Verified 3 hours ago
*see terms
Details
Offer details: Verify your student status through Student Beans, Unidays, or Mecenat to unlock your unique 15% discount code for full-price items
Terms:
Verified student status required. Valid on full-price items only. One use per customer and cannot be combined with other promotions
From 49 €
COSPromo
Jumpers and cardigans from €49
Expires in 5 days
Verified 5 days ago
From 69 €
COSPromo
Discover boots, flats and trainers from €69
Expires in 19 hours
Verified 20 hours ago
From 19 €
COSPromo
Celebration-ready outfits from just €19
Expires in 5 days
Verified 5 days ago
95% Off
COSPromo
Enjoy up to 95% off stylish gifts for women
Expires in 5 days

COS Offers You May Have Missed

15% Voucher
Voucher code
15% off your first order
Valid on full-price items for new customers
Expired
Last used 6 hours ago
DHL
10% Voucher
Voucher code
10% off your first order
Valid on full-price items only. Excludes external items and gift cards. One use per customer. Online redemption requires COS account sign-in. EU/UK/Switzerland only
Expired
HGY
40% Off
Promo
40% off selected pieces
Expired

The biggest COS discounts usually appear in July, reaching up to 15% off. Most new codes drop in Q2 - spring promotions.
Shopilo curates COS offers continuously to spot when the best discounts appear: seasonal campaigns, holidays, special promotions, and surprise drops. On average, 1 new coupons and vouchers are added per month, all manually verified by the Shopilo team. That means over 2 offers tracked in a year . The chart below helps you see how offers are distributed throughout the year so you can plan your shopping around the months with the biggest discounts. The bars show new codes added each month (blue). The orange line marks the maximum discount, and the stars highlight the months with the biggest discounts of the year.

COS: codes per month, last 13 months
Month	New codes	Max discount	Min discount	Best code	Best code title	Best code (%)
2025-09	0	-	-	-	-	-
2025-10	0	-	-	-	-	-
2025-11	0	-	-	-	-	-
2025-12	0	-	-	-	-	-
2026-01	0	-	-	-	-	-
2026-02	0	-	-	-	-	-
2026-03	0	-	-	-	-	-
2026-04	0	-	-	-	-	-
2026-05	0	-	-	-	-	-
2026-06	1	10%	10%	W1-3XSO2FHHGY	10% off your first order	10%
2026-07	1	15%	15%	W2-6Y4QUTBDHL	15% off your first order	15%
2026-08	0	-	-	-	-	-
2026-09	0	-	-	-	-	-

Over the past 12 months, Shopilo measured shopper interest in COS codes in Ireland and recorded 4,220 searches, -19%% vs last year. The chart shows our monthly retail demand analysis for COS coupon-related searches. Each line colour represents a calendar year; the dashed segment shows a 5-month forecast; the shaded band marks the forecast confidence range. Our data indicates that interest typically peaks in October and November, when shoppers are more likely to search for COS promo codes, seasonal deals, and limited-time offers. This analysis is based on aggregated monthly coupon demand signals tracked by Shopilo for Ireland.

What is the demand for COS discount codes in Ireland?
year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sept	Oct	Nov	Dec
2024	480	390	480	390	480	390	320	320	480	590	590	480
2025	480	320	390	480	390	390	390	390	390	480	480	390
2026	320	260	260	210	260	260	260	260	260	320	-	-

About COS

COS creates a wardrobe of ready-to-wear essentials and accessories that prioritize longevity and structural design. They rely on a highly structured promotional cycle rather than constant couponing. While they rarely release generic promo codes for the public, they consistently reward new customers with a welcome discount and maintain a year-round verification program for students. Their membership program is worth joining, as it gives you a head start on seasonal sales. The brand operates a standalone Dublin boutique and has a presence at Brown Thomas, but their online store offers the best access to their full collection and official resale marketplace.

Sells

Minimalist menswear, womenswear, tailored coats, knitwear, dresses, leather accessories, and sustainable jewelry.

Best For

Shoppers looking for high-quality basics and architectural tailoring that offer a luxury aesthetic at an accessible price.

Known For

COS is recognized for its architectural minimalism and its use of premium materials like merino wool and organic cotton to create timeless pieces that outlast seasonal trends.

Price Range

Mid-Range

Top Perks

COS Resell platform provides a dedicated, brand-authenticated space to buy and sell pre-owned pieces from previous seasons.
Member-exclusive early access windows allow you to secure popular sizes before seasonal sales open to the general public.
Members receive free shipping on all orders over €50.

Good to Know

Refunds for online orders in Ireland can take up to 14 days. Items purchased in physical stores cannot be returned through the online portal. You have 30 days for standard returns, while sale items must be returned within 14 days. The fit is intentionally oversized and boxy, so you may want to size down for a more traditional look.

How to Save at COS

Sign up for a COS account to unlock free standard shipping:Join the COS Membership to get free standard shipping on orders over €50.
Claim a student discount on full-price items:Verify your status via Student Beans, UNiDAYS, or Mecenat through the student discount portal to save 15% on full-price items. Sale items are excluded.
Sign up for the newsletter for a first-order discount:Sign up for the COS newsletter to get 10% off your first order.
Get early sale access as a COS Member:COS Membership gives you early access to sales. Sale items have a 14-day return window, compared to the standard 30-day policy.
Pay in installments with Klarna:Spread the cost of your order by choosing Klarna at checkout.

COS promo code FAQs

Why isn't my emailed COS discount code working?

The code will only work during its stated validity period and under the conditions supplied with it.

Can I use a COS promo code on sale items?

Usually not, because COS does not combine offers with other discounts unless the specific promotion allows it. Already reduced items are therefore ineligible unless the code terms expressly include sale items.

The student code applies to full price items only and cannot be combined with another offer or discount.

How do I get the COS student discount in Ireland?

Verify your student status through Student Beans, UNiDAYS or Mecenat, then collect your COS code from the verification service.

The Ireland student discount is 15% off full price items, although COS may increase the percentage during selected student events. Check the rate shown when you generate the code. It is limited to one redemption per customer and cannot be combined with another offer or discount.

For example, a 15% code reduces a €120 full price item by €18, so you pay €102.

Pro tip: Generate the code when your full price basket is ready because COS permits one redemption per customer.

How do I get 10% off my first COS order?

Sign up for the COS newsletter with your email address. COS offers subscribers 10% off their first order, and you must confirm that you are at least 16 when subscribing.

For example, 10% off a €90 first order removes €9, so you pay €81.

Can I add a COS promo code after placing my order?

No, because COS requires the code to be applied before the purchase is completed.

If you selected standard delivery and notice immediately, call COS. Cancellation may be possible within one hour of placing the order. If it succeeds and the items remain available, you can place a new order using the code.

Why can't I complete a very small COS order after applying a code?

Your order total must remain at least €5 after COS deducts the voucher or discount. A code that reduces the total below €5 can prevent the order from being processed.

For example, a 10% code reduces a €5.50 basket to €4.95, which is below the minimum. The same code reduces a €6 basket to €5.40, which meets the requirement.

Where can I find COS promo codes for Ireland?

Check COS promo codes verified by DontPayFull first, then try the COS newsletter for its first order offer and announcements about one-off promotions. Eligible students can claim a personal code through Student Beans, UNiDAYS or Mecenat.

COS Coupon Codes

Today's Top COS Offers

10% off Your First Order

15% off for Students

Jumpers and cardigans from €49

Discover boots, flats and trainers from €69

Celebration-ready outfits from just €19

Enjoy up to 95% off stylish gifts for women

COS Offers You May Have Missed

15% off your first order

10% off your first order

40% off selected pieces

When do the best COS discount codes appear?

What is the demand for COS discount codes in Ireland?

COS discount code activity

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