Costco Coupon Book — May–Jun 2026
Valid May 11 – Jun 7, 2026 · 11 items
This book expired on Jun 7, 2026. Kept as an archive — useful for spotting sale patterns.
Use the Costco Sale Cycles tool to see which months each product category typically goes on sale.
View toolLaundry Detergent (4)
| Item | Discount |
|---|---|
| Tide + Downy, 128 fl oz Tide | $4 off |
| Tide Free & Gentle, 154 fl oz Tide | $5 off |
| Tide Spring Meadow Pods, 156 ct Tide | $6 off |
| Tide Ultra OXI Powder, 225 oz Tide | $6 off |
Toilet Paper (Charmin) (1)
| Item | Discount |
|---|---|
| Charmin Ultra Soft Charmin | $6.60 off ($26.39) |
Cascade / Dawn (2)
| Item | Discount |
|---|---|
| Cascade Complete Pacs Cascade / Dawn | $4 off |
| Cascade Platinum Cascade / Dawn | $2.50 off |
Oral-B Brush Heads (1)
| Item | Discount |
|---|---|
| Oral-B CrossAction heads (multiple SKUs) Oral-B | $11 off |
OTC Medications (2)
| Item | Discount |
|---|---|
| MiraLax | $7 off |
| Prilosec OTC | $5 off |
Vitamins & Supplements (1)
| Item | Discount |
|---|---|
| Nature Made, Kirkland Fish Oil, Centrum Silver, Sports Research, Garden of Life (15+ SKUs) | $3.50–$8 off |
Items transcribed from the US warehouse savings book. In-warehouse only; regional variations exist. Discounts apply to members at checkout — no code needed.