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CoSM Promo Codes and Coupons September 2025
CoSM
COSM is a science and space exploration merchandise store affiliated with the Center of Science and Mathematics. They offer educational products, space-themed apparel, astronomy equipment, and scientific toys designed to inspire curiosity about the cosmos and scientific discovery.
shop.cosm.orgToday's CoSM discount codes
TOP PICK
Free gift
428 uses
high
worked about 2 months ago
Free Gift Storewide at CoSM
10% off
5175 uses
high
worked about 2 months ago
10% Off Storewide at CoSM
$10 off
146 uses
low
worked about 6 years ago
$10 Off Orders Over $100 at CoSM (Site-Wide)
15% off
139 uses
low
worked almost 4 years ago
15% Off Storewide at CoSM
Featured CoSM Products
What CoSM coupons are available today?
We track so many discount codes. Read about today's CoSM coupon statistics.
14
CoSM deals available today
2
Active CoSM codes
10% off
Biggest discount available
Get the best CoSM promo codes and coupons that actually work. Our community of sustainability minded shoppers helps you save by testing and sharing:
- Verified promo codes with live success rates from recent shoppers!
- Exclusive single-use codes shared by our community (14 active codes).
- Drop alerts when CoSM's most popular items go on sale!
- Deals for those who want extra savings opportunities
- Insider savings tips from experienced CoSM shoppers who know the best deals.
Why TerraCoupons finds better CoSM discounts:
- Live success tracking: See exactly which codes are working for other shoppers right now
- Real-time feedback: Every code attempt is tracked and ranked to show you the best options first
- Sale predictions: Get alerted when CoSM's next big discount event is coming
- Exclusive savings: reseller discounts, shopping tips and sustainability tips you won't find elsewhere
Special Offer
90 uses
low
worked almost 3 years ago
Free Shipping On Storewide (Minimum Order: $150) at CoSM
31% off
73 uses
low
worked over 6 years ago
31. 4% Off Posters at CoSM
31% off
46 uses
low
worked over 7 years ago
31. 4% Off Posters at CoSM
10% off
39 uses
low
worked almost 8 years ago
10% Off Visionary Art Blankets at CoSM Shop
More CoSM Products
$10 off
47 uses
low
worked over 6 years ago
$10 Off All Order at CoSM
25% off
37 uses
low
worked almost 8 years ago
25% Off Hats at CoSM
33% off
35 uses
low
worked almost 8 years ago
33% Off Posters at CoSM Shop
22% off
23 uses
low
worked almost 8 years ago
22% Off Posters at CoSM Shop
Sustainability Score
72%
While COSM demonstrates commitment to sustainable packaging and carbon-neutral shipping, their supply chain transparency needs improvement. They have strong ethical labor practices and fair trade partnerships, but their animal testing policies for educational materials lack clarity. Their environmental initiatives are promising, including renewable energy use in warehouses and recycling programs, though their international shipping impact remains a concern. Regular sustainability reports are published, but some metrics lack third-party verification.
About CoSM
4.0 (3)
FAQs
COSM usually runs major sales during Black Friday, Cyber Monday, and National Space Week (October). They also offer special discounts during major space events and astronomical phenomena.
Yes, students with valid .edu email addresses can receive a 10% discount on regular-priced items after verifying their student status.
The best deals on high-end equipment typically appear during their annual Summer Stargazing Sale (July) and end-of-year clearance (December).
COSM offers price matching on identical items from major authorized retailers within 14 days of purchase.
In the past month, CoSM has launched 0 new promo coupons for shopper discounts. This indicates that CoSM does not provide regular opportunities for customers to save money on their purchases.
On average, CoSM provides 5.5 discount coupons each month. Based on historical data, the average time between CoSM coupon releases every 5 days. However, this rate depends on various factors such as seasonal promotions (Black Friday, Cyber Monday, etc.), product launches, or other marketing initiatives. To stay informed about upcoming discounts and promotions, we recommend checking CoSM website regularly, subscribing to email newsletters, and following them on social media.
CoSM is offering 2 working store-wide codes, however they are also offering 12 additional discount codes with a best discount of 10% off
terra.coupons is the #1 provider of discount codes for your favorite retailers, such as CoSM. As a crowd-sourced platform for coupon codes, we accurate codes for over 10,000 stores. Save time and avoid expired codes by checking terra.coupons for the latest CoSM discount codes.
Curated by
Linda S.
Content Writer
Last updated September 2025
This page was curated by Linda, a savings and discount enthusiast from sunny Sarasota, Florida. With a keen eye for unbeatable deals, Linda ensures that all codes are checked and curated daily. She's also a certified yoga instructor who loves to share wellness tips. Check back tomorrow for more savings and perhaps a little zen!
Latest CoSM coupon activity
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