Share on Twitter Share on Facebook Advertiser Disclosure: At Slickdeals, we work hard to find the best deals. Some products in our articles are from partners who may provide us with compensation, but this doesn’t change our opinions. Our editors strive to ensure that the information in this article is accurate as of the date published, but please keep in mind that offers can change. We encourage you to verify all terms and conditions of any product before you apply. The September Costco Coupon Book is almost here. The latest members-only deals are valid from August 24, 2026, through September 20, 2026, and many of the specials in the Costco monthly flyer are also offered both in-warehouse and online for members. We’re still waiting to get our hands on the physical copy so we can update the images, so check back soon! From supplements to detergent and cleaning products, the current Costco coupon book is worth a look to see just how much you can save before you start shopping at your local Costco or online. You can join the community discussion for this month’s coupon book over here. We add the Costco monthly ad on this page so you can see all the deals in one place before you even reach your local Costco store. You can also find a small sample of the top Costco deals on Slickdeals below, as voted on by the community . Costco September 2026 Coupon Book Specials and Prices (Aug. 24 – Sept. 20, 2026) Shop and Save with Costco Online on Top In-Store Savings and Deals for September Costco members can also save big while shopping from the comfort of their sofa or while on the go with a huge selection of online deals updated monthly. Also, check out the most recent and current Costco online-only deals . How to Find the Best Costco Savings Whether you’re shopping online or in the store, setting up a Deal Alert is the best way to get notified or discover the best Costco discounts along with other brands or items. If a new sale or item is being sold in the price range you select, you’ll receive an automatic email directly to your inbox about the newly posted deal which has been vetted and approved by our community of users. And keep in mind you get free shipping on online orders of $75 or more as a Costco member. Ways to Save Even More Money at Costco Costco is known for great deals on bulk items, but it can be challenging to immediately save money when buying in large quantities. We’ve uncovered a few unexpected secrets to saving money at Costco during your next shopping trip. Get more tips in our Best Items to Buy at Costco Shopping Guide . If not a member yet, join Costco now to take advantage of these great discounts and more, both in-store and online. Or, consider joining Sam’s Club where low-cost annual or even ‘free’ membership deals are regularly offered. If you’re new to Costco you might be surprised that there actually aren’t any Costco coupons that you need to enter anywhere. All discounts have already been applied to the listed price and you can find them all in this coupon book, so need to hunt for a coupon code. As we previously mentioned , the Costco coupon book lists “everyday low price” items as “your cost,” which is calculated by taking the featured September 2026 Coupon Book “instant savings” amount off the warehouse price to show the final sale price for the current month. After the current coupon book is expired, check back here as we upload the new ad preview as soon as it’s available, which is usually a few days before the offers go live. Make sure to also check the latest Slickdeals posts on Costco where our community of 12 million deal hunters comments on all Costco deals and savings. More Costco Member Deals Costco’s Executive and Gold Star Memberships Don’t forget that if you’re a loyal Costco customer who spends at least $230 per month over the course of a year, it would benefit you to sign up for Costco’s Executive Membership — the year-end reward certificate (2% back on purchases) basically pays for your membership fee. If you’re a less frequent Costco shopper you can opt for the Gold Star Membership instead. It’s only $65 a year and you can use it at any Costco Wholesale club in the world. The Costco membership is also fully refundable if you’re not satisfied with it, so there’s not much to lose. Several times throughout the year we also see new membership deals from Costco where you can get a one-year Gold Star Membership plus a $20 Costco cash card and an online coupon for $25 off $250 or more at Costco.com. That’s a great deal! Plus, Costco has introduced a digital card membership through the Costco app to make your life even easier, especially if you ever forget your shop card at home. It looks like it works on basically everything except gas stations, so now all you need to do is flash the app when you walk into a Costco store and you’re good to go. Meal Deals at the Costco Food Court And let’s not forget the steal that is the Costco food court. You can get a big meal for only a few bucks. The Costco hot dog and soda combo for $1.50 (the price is unchanged since 1985) is hard to beat, and the pizza is a perfect snack as you exit the store after having spent way too much money and time in there. For other Costco coupons, promo codes, deals and offers, check out the Costco coupons page on Slickdeals, or visit the Warehouse Savings section on Costco’s website for all active member-only savings (Note: the next round of savings should drop again soon, so make sure to set a Deal Alert. Ready to save even more? Set up a custom Deal Alert and we’ll notify you whenever a new discount or sale hits our forums. Johan Mengesha is the Editor in Chief at Slickdeals in Los Angeles, Calif. Mengesha has written for print and online media outlets since 2003 and has a journalism degree from Cal State Northridge. Published work has appeared in the "Los Angeles Daily News," Yahoo, SPY, Runner's World and LiveSTRONG. Follow the Deals Get all the latest deal news and sales info sent directly to your inbox from Slickdeals. Shopping Related Articles Shopping Shopping 3 minute read Chest Freezer Are on Sale Right Now: Up to 53% Off at Best Buy and Walmart Read More Chest Freezer Are on Sale Right Now: Up to 53% Off at Best Buy and Walmart Shopping Shopping 2 minute read Best Buy Is Selling $100 DoorDash Gift Cards for $85 Right Now Read More Best Buy Is Selling $100 DoorDash Gift Cards for $85 Right Now Shopping Shopping 2 minute read Walmart+ Members Get 25 Free 4×6 Photo Prints Every Calendar Month Read More

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