Buy 2 Get 1 Free on dish soap

How to redeem this coupon

This Costco coupon offers Buy 2 Get 1 Free on dish soap. The redemption method is: In-app barcode — scan at self-checkout. Follow the steps below to make sure the discount applies cleanly at checkout.

1. Add the qualifying item to your cart. Pay close attention to the size and brand — most coupons require a specific package size, and a substitution at the register can void the discount.
2. Activate the coupon. Enter the code SAVE866A5 at the appropriate step (online checkout, app cart, or register screen).
3. Verify before paying. Check the running total or the on-screen subtotal before tapping Pay. If the discount didn't apply, ask the cashier to scan the coupon manually or rerun the loyalty lookup.
4. Save the receipt. If you're stacking with a cashback app, the receipt scan needs to happen within the app's window — usually 14 days from purchase. Bigger savings come from combining store coupons with manufacturer coupons and a separate cashback rebate, so don't skip the receipt step.

Restrictions to watch out for

Like most grocery coupons, this Costco offer carries a few standard restrictions. The coupon is valid only on the specific product listed above — close substitutes (different brand, different size, different flavor) won't trigger the discount even if they look identical on the shelf. The offer cannot be combined with employee discounts in most cases, but it can usually be combined with the weekly circular sale price, which is where the real savings stack up.

Limit one coupon per transaction unless the offer specifies otherwise. If you're shopping for a household and want to use multiple identical coupons, ring up separate transactions or use the store's pickup/delivery service, which sometimes treats each order as its own transaction. Coupons cannot be redeemed for cash, and the discount cannot exceed the price of the item — if the item is on sale below the coupon's face value, you don't get the difference back.

Stack this coupon for bigger savings

The deepest discount on dish soap at Costco usually comes from stacking three things: this coupon, the store's current weekly sale on the same product, and a cashback rebate from a partner app. We outline the stacking strategy in our How it works guide, and our Weekly Deals Digest emails subscribers when a stacking opportunity worth $5+ goes live for any of their preferred stores.

About Costco

Costco — Members-only warehouse savings — is one of the largest U.S. grocery chains by store count and weekly customer volume. We track 25 active coupons for Costco in our directory across produce, dairy, pantry staples, frozen foods, snacks, beverages, household supplies, and more. Browse them all on the Costco deals page.