Costco Coupons & Promo Codes
9 offers · 7 verifiedAs of September 3, 2026
Reviewed by Alexandra Skakowska, SaversPrice Editorial Team
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Top Costco Coupons & Promo Codes for September 3, 2026
Browse all 9 active coupons
Code
OFFER
Top OfferCostco Verified
Use code SUMMERSAMEDAY26 at checkout.
Checked Jul 28
CodeCostco Verified
OFFER
Credit Card
Checked Jul 28
CodeCostco
$40OFF
Free $40 Digital Costco Shop Card w/ New Costco Summer Promotion
CodeCostco
$130OFF
$130 for an Executive Membership Package + $50 Digital Costco Shop Card
DealCostco Verified
$599.99OFF
Sealy Posturepedic Plus Prosser Hills 12” Firm Queen Mattress $599.99 after $150 OFF
Checked Aug 24
DealCostco Verified
$30OFF
$30-$800 OFF Select Home Furnishings
Checked Aug 7
DealCostco Verified
$5OFF
After $5 OFF
Checked Jul 28
DealCostco Verified
$7OFF
After $7 OFF
Checked Jul 28
DealCostco Verified
$1OFF
Thomasville Lowell Modular Sectional $1,499.99 After $500 OFF
Checked Jul 28
In short: As of September 3, 2026, there are 9 Costco offers (4 promo codes and 5 deals) on this page, and the top discount is $40 off.
Costco at a glance
- Known for
- Bulk value & famously generous return policy
- Membership
- Gold Star & Executive tiers
- Executive perk
- Annual 2% reward on eligible purchases
- Kirkland Signature
- Costco's acclaimed house brand
- Mobile app
- iOS & Android
- Category
- Wholesale Club
- Shop online at
- costco.com
- Live offers
- 9 offers
- Offers as of
- September 3, 2026
- Offer types
- 4 promo codes and 5 deals
- Best discount
- $40 OFF
- How codes are checked
- Confirmed on the store's own site
Top Costco Coupon Codes & Deals for September 3, 2026
The 9 best Costco offers, ranked by what's working, as of September 3, 2026.
| Code | Discount | Costco Offer | Expires |
|---|---|---|---|
| SUMMERSAMEDAY26 | Sale | Use code SUMMERSAMEDAY26 at checkout. | Ongoing |
| Membership58N | Sale | Credit Card | Ongoing |
| AFFNMBR | $40 OFF | Free $40 Digital Costco Shop Card w/ New Costco Summer Promotion | Ongoing |
| GOLDEN | $130 OFF | $130 for an Executive Membership Package + $50 Digital Costco Shop Card | Ongoing |
| No code needed | $599.99 OFF | Sealy Posturepedic Plus Prosser Hills 12” Firm Queen Mattress $599.99 after $150 OFF | Ongoing |
| No code needed | $30 OFF | $30-$800 OFF Select Home Furnishings | Ongoing |
| No code needed | $5 OFF | After $5 OFF | Ongoing |
| No code needed | $7 OFF | After $7 OFF | Ongoing |
| No code needed | $1 OFF | Thomasville Lowell Modular Sectional $1,499.99 After $500 OFF | Ongoing |
How Costco pricing works (there are no promo codes)
Costco does not run a promotional code system in the way other retailers do. Its discounts are applied automatically as instant savings during set periods, and the membership itself is the mechanism — which means any site offering a working Costco discount code is describing something that does not exist.
Discounts are automatic; membership is the gate. There is no meaningful promo code field for Costco warehouse pricing. Instant savings are applied to qualifying items automatically during the promotional period, with no code involved, and membership is required to purchase at all in most cases. Any third-party code claiming to unlock Costco pricing should be treated with suspicion.
- 1
Understand that instant savings need no code
Promotional reductions are applied automatically to qualifying items during their period. There is nothing to enter and nothing to activate.
- 2
Factor the membership into the maths
The annual fee is the real cost of access. Whether Costco saves you money depends on volume of spend against that fee, not on any individual discount.
- 3
Compare tiers against your actual spending
The higher membership tier returns a percentage of qualifying purchases annually. Whether it beats the standard tier depends entirely on how much you spend.
- 4
Check the online price against the warehouse
Online and in-warehouse pricing differ on many items, and delivery is built into online pricing. Comparing the two is a more reliable saving than hunting a code.
About Costco
Costco is a membership warehouse club offering bulk groceries, electronics, apparel and more at low prices.
Right now there are 9 Costco offers — 4 promo codes and 5 deals. The top saving on offer today is $40 off. 4 codes you paste at checkout, the rest apply automatically.
Right now this page lists 4 promo codes and 5 deals, the largest being $40 off.
What to expect from Costco promo codes
- Promo codes — 4 active Costco codes you can copy and paste at checkout for an instant discount.
- No-code deals — 5 offers that apply automatically when you shop through SaversPrice, no code required.
- Best discount — the largest Costco offer on this page is $40 off.
How to save money at Costco
- 1Reveal and copy a Costco promo code above, then paste it into the discount box at checkout before you pay — the price should drop straight away.
- 2Compare the offers above before you buy — a percentage-off code usually beats a fixed-amount one as your Costco total grows.
Costco discount stats
9
Total offers
4
Promo codes
5
Online deals
$40 OFF
Top discount
Across this page we're listing 9 live Costco offers — 4 promo codes and 5 deals. The largest active discount is $40 off.
Why trust SaversPrice?
7 of the 9 Costco offers on this page were read from Costco's own site and carry a Verified badge. This page holds 4 codes you paste at checkout and 5 deals that apply without one, codes listed first.
Costco Coupon FAQs
Common questions about saving with Costco promo codes
A membership gets the best prices on Costco.com; non-members can buy some items online but typically pay a surcharge. In-warehouse shopping requires a membership card.
Famously generous: under its stated risk-free, 100% satisfaction guarantee most items can be returned at any time, with electronics limited to 90 days. Even memberships are refundable.
Many Costco.com items include shipping in the listed price ("shipping & handling included"), while grocery delivery has order minimums. The product page always states the delivery terms.
Costco's member deals from its monthly savings events apply automatically at checkout — no codes to clip. Online promo codes are rare, so the automatic member pricing is the main saving.
If you spend regularly at Costco, the annual 2% reward on eligible purchases often exceeds the upgrade fee — and Costco will credit the difference in many cases if it doesn't pay off.
The monthly member-savings events, plus major holiday windows (Black Friday through New Year) when electronics and home goods see the deepest cuts.
As of September 3, 2026, there are 9 Costco offers available — 4 promo codes and 5 deals, with discounts up to $40 off. They are all listed above, codes first.
Not for warehouse pricing. Costco applies its promotional reductions as instant savings on qualifying items during set periods, with no code to enter. Sites advertising working Costco discount codes are describing a mechanism that does not exist.
It depends on spend. The upper tier returns a percentage of qualifying annual purchases, so it pays only above a certain level of spending. Below that, the standard membership costs less overall.
Costco Tips & Comments (1)
Have a Costco tip or did a code work for you? Share it with other shoppers.
- SSaversPrice Team
An asterisk (*) in the corner of a Costco price sign means the item won't be restocked — if you've been thinking about it, that's your last call.
Savings guides & tips
Expert guides from the SaversPrice team to help you save even more — on Costco and everywhere else.