costco.com.au
12 offers to explore · Updated
SAVE ON YOUR NEXT ORDER
Common Costco codes from the offers we've collected, shared for reference only. A code isn't guaranteed to work, so check the offer's terms at checkout.
Shop at costco.com.au →No offers match this filter.
Past promotions for reference. These offers may no longer be redeemable.
SUMMER30APRIL20MOM20EXTRA15| Code | Discount | Offer | Expires |
|---|---|---|---|
| COSTCOSAVE | Up to 20% | Are Available on Your Shopping | Nov 27, 2026 |
| SIGNUP20 | 20% OFF | Get a 20% off When You Subscribe to the Newsletter | Nov 29, 2026 |
| NEW20 | 20% OFF | Apply 20% off to Your Checkout | Nov 16, 2026 |
| WELCOME20 | 20% OFF | Save 20% on Your Order for Subscribing to costco.com.au Newsletter | Nov 28, 2026 |
| Deal | Up to 50% OFF | Save Up to 50% on Select Sunglasses | Nov 26, 2026 |
Costco is a membership warehouse club operating in Australia, selling bulk groceries and branded goods at competitive prices. Its range covers groceries, electronics, appliances, furniture, homewares, clothing, health and beauty products, baby and kids items, toys, sporting goods, jewellery, office supplies, automotive products, outdoor and garden supplies, and pet supplies, alongside Kirkland Signature, the company's own label. Shoppers need an annual membership to buy, whether in a physical warehouse or through the online store, and purchases come with a satisfaction guarantee.
The company behind it, Costco Wholesale Corporation, began in Seattle in 1983 and built its model on charging a yearly fee, keeping the product range narrow and selling in large quantities at thin margins. Its first Australian warehouse opened in Melbourne's Docklands in 2009, and the local business has since expanded to warehouses in other capitals.
Payment can be made with Visa, Mastercard or Eurocard. Delivery costs are built into the advertised price for most standard online items. Most online orders can be returned free, either in a warehouse or by post with a prepaid label, and large items are collected from the home; electronics and appliances must be returned within 90 days.
Costco Australia also runs an Executive Membership that pays an annual 2% reward of up to $1,000 on qualified purchases, and official Costco Shop Cards, which have no expiry date and can be used by anyone at an Australian warehouse.
Codes go into the discount code box at the Costco checkout; deals need no code.
Pick a code from the list above. Its details give the discount and any conditions, such as a minimum spend or an end date.
Select Show Code. A window opens with the full code, a Copy code button and a link to costco.com.au.
Add your items at costco.com.au, then paste the code into the discount code box in your cart or at checkout.
Make sure the discount shows in the order total before you pay. If it does not, the order may not meet one of the code's conditions.
Yes. From time to time Costco runs "Refer a Friend" promotions, and both the person referring and the new member receive a Costco Shop Card when they sign up in a warehouse.
Yes. Costco Australia issues official Costco Shop Cards, which carry no expiration date and can be used by anyone at Australian warehouses. Digital gift cards for other brands can also be bought online.
Yes. On Costco.com.au the delivery cost is included in the advertised price for most standard eCommerce items. With Costco Business Delivery, shipping is free on orders over $2000 (excluding GST).
Yes. Costco Australia runs clearance and sale events, and the deals sit in sections such as Last Chance Clearance, which holds remaining stock, and Warehouse Savings, which carries promotional flyers and in-warehouse coupons. Price tags ending in $0.97 mark clearance items.
Promotion rules at Costco can change while a campaign is running. A coupon that applied earlier may stop working because its expiry date moved or a new exclusion was added.
COSTCOSAVE gives the biggest discount on this page, up to 20% off. The biggest deal, up to 50% off, needs no code.
All 12 offers have an end date. The next to end is the deal "Doordash $100 Digital Gift Card", on Nov 16, 2026.
No offer on this page states a use limit.
Yes. Most online orders can be returned free, either in a warehouse or by mail with prepaid labels, and for large items the home pickup is arranged at no charge. Most items can go back at any time for a full refund, though electronics and appliances have to be returned within 90 days.
Yes. Costco Australia has an Executive Membership that pays an annual 2% reward, up to $1,000, on qualified purchases. Members also get discounts on services and referral rewards.
Yes. Costco runs seasonal discounts around holidays and special occasions, generally matched to what each season calls for, such as discounted holiday decorations during the festive period and markdowns on seasonal goods like outdoor furniture or grilling equipment in summer. These give customers a chance to save on products suited to that time of year.
Costco accepts Visa, Mastercard and Eurocard.
Costco has official accounts on Facebook, Twitter, Instagram and LinkedIn.
Over the past year, 38 Costco codes were collected, about 3 a month. The busiest month was August 2026, with 9 codes. The most popular discount was 50% off, offered in December 2025.