Costco is a powerhouse for bulk grocery savings, but its sales model operates differently than a standard supermarket. Understanding how Costco sales work, when to buy, and how to stack savings is the key to turning a routine shopping trip into a serious money-saving strategy. This guide breaks down the mechanics of Costco grocery deals so you can maximize every dollar.

How Costco Sales Actually Work: The Markdown System

Costco does not use traditional weekly circulars or store-wide percentage-off sales like most grocery chains. Instead, they rely on a specific markdown system that signals a true deal. The most important signal is the price tag ending in .97. This indicates a clearance or manager-initiated markdown, not a manufacturer coupon or standard promotion. These .97 deals are often the deepest discounts in the store, but they are also limited in quantity and location-specific.

Another key indicator is the asterisk (*) in the upper right corner of the price sign. This star means the item will not be reordered. When you see a .97 price with an asterisk, you are looking at a discontinued or seasonal item being cleared out. This is the prime opportunity for deep grocery savings on non-perishables, frozen foods, and even some fresh items. The discount can range from 20% to 50% off the regular Costco price.

Standard sales at Costco are typically manufacturer-driven and appear as instant rebates at the register. These are marked with a yellow "Sale" sign and a specific end date. These deals are reliable but rarely as deep as the .97 clearance markdowns. The best strategy is to combine knowledge of both systems: buy staples during manufacturer sales and stock up on high-value clearance items when you spot the .97 tag.

Reading the Costco Price Tag Code

Every Costco price tag contains hidden information that tells you the deal status. Learning to read this code is the single most effective skill for grocery savings at Costco.

The Price Ending Decoder

  • .99: Full retail price. No deal. This is the standard Costco price for that item.
  • .97: Clearance or manager markdown. This is the best deal in the store. Act fast, as stock is limited.
  • .00 or .88: Floor sample or display model markdown. Rare for groceries, but sometimes applies to large beverage or snack displays.
  • .49 or .79: Manufacturer markdown or special buy. These are typically temporary price reductions on specific items.

The Asterisk (*) Warning

As mentioned, an asterisk in the top right corner of the price sign means the item will not be restocked. This is your signal to buy now if you want it. Without the asterisk, a .97 price could simply be a temporary markdown that will return to full price later. With the asterisk, the item is gone for good once the current inventory sells out.

The Date Code on Perishables

Costco often marks down fresh meat, deli items, and bakery goods with a .97 price when the sell-by date is approaching. This is a fantastic way to save 30-50% on high-quality proteins and prepared foods. Always check the date and plan to cook or freeze the item immediately. The discount is applied at the register based on the marked price, so you do not need a coupon.

Stacking Savings: Coupons, Rebates, and Executive Membership

True grocery savings at Costco come from layering multiple discounts. While Costco does not accept manufacturer coupons from outside sources, they have their own internal systems that can be combined.

Executive Membership 2% Reward

If you spend more than $250 per month at Costco, the Executive Membership ($120/year) pays for itself. You earn 2% back on almost all purchases, including sale items and clearance deals. This 2% is effectively a discount on top of any markdown you already secured. For a family buying bulk groceries, this adds up to $60-$120 or more annually.

Costco Anywhere Visa Card

Using the Costco co-branded Visa card adds another layer: 2% back on Costco purchases (including gas and groceries) plus 3% on restaurants and travel, and 4% on gas. Combined with Executive Membership, you get 4% total back on Costco grocery purchases. This is a significant stack that many shoppers overlook.

Costco Shop Cards (Gift Cards)

You can purchase Costco Shop Cards at a discount through third-party resale sites or occasionally through employer benefits programs. Using a discounted Shop Card to pay for your groceries effectively adds another 2-5% savings on top of your membership rewards. Always check the terms, as some resellers are not authorized.

Manufacturer Rebates (Mail-in or Digital)

Some items at Costco, particularly electronics, appliances, and certain health products, offer manufacturer mail-in rebates. These are separate from the in-store price. You pay the full price at the register, then submit proof of purchase for a check. Always read the fine print: rebate forms must be submitted within a specific window, and you need the original UPC code. For groceries, this is rare but occasionally applies to energy bars, supplements, or baby formula.

When to Buy: Timing Your Costco Grocery Run

Timing is everything for maximizing grocery savings at Costco. The store's inventory and markdown cycles are predictable once you know the pattern.

Best Days for Clearance Deals

Costco typically receives new shipments and resets shelves on weekdays. The best days to find .97 clearance items are Tuesday, Wednesday, and Thursday. Monday mornings can also be good if the store was busy over the weekend and needs to clear out seasonal or overstocked items. Avoid weekends for deal hunting; the store is crowded, and the best clearance items are often picked over by Friday afternoon.

Seasonal Clearance Windows

Costco is famous for its seasonal items. The markdowns follow a predictable calendar:

  • January-February: Holiday candy, decorations, and winter seasonal foods go to .97 clearance. Stock up on baking supplies and snacks for the year.
  • April-May: Spring and Easter items clear out. Look for marked-down ham, lamb, and specialty baking ingredients.
  • July-August: Summer grilling supplies, condiments, and picnic items hit clearance. This is the best time to buy ketchup, mustard, and barbecue sauce in bulk.
  • October-November: Back-to-school and fall seasonal items are cleared to make room for holiday inventory. Look for marked-down snack boxes and baking mixes.
  • December 26-31: The motherlode. Holiday gift sets, chocolates, and seasonal foods are slashed to .97 prices. This is the single best week of the year for grocery savings at Costco.

End-of-Day Markdowns on Perishables

Fresh meat, poultry, and prepared foods are often marked down in the late afternoon or early evening. If you shop around 4:00 PM to 6:00 PM, you will find the best selection of marked-down proteins and deli items. The markdowns are applied by the meat department staff, so timing your visit to coincide with their markdown schedule is key. Ask a butcher when they typically discount items at your local store.

Common Mistakes That Kill Your Savings

Even experienced shoppers make errors that erode their grocery savings at Costco. Avoid these pitfalls to keep your effective discount high.

Buying Perishables You Cannot Use

The biggest mistake is buying a bulk quantity of a perishable item simply because it is on clearance. A 5-pound bag of salad greens at 50% off is not a deal if you throw away 3 pounds of it. Always calculate your household's actual consumption rate. For non-perishables, this is less of a risk, but for fresh items, stick to what you will use within the shelf life or freeze immediately.

Ignoring the Unit Price

Costco's bulk prices are usually lower per unit than grocery stores, but not always. Compare the unit price (price per ounce, per pound, or per count) to the same item at a regular grocery store during a sale. A .97 clearance price at Costco is almost always a win, but a standard .99 price on a brand-name item might be cheaper at a supermarket with a coupon. Always do the math.

Falling for the "Sale" Sign Without Checking the Date

Yellow sale signs are tempting, but they are often only a 10-20% discount. Compare that to the .97 clearance markdown which can be 50% or more. Do not impulse-buy a yellow sale item unless it is a staple you need immediately. The real savings are in the clearance section.

Forgetting to Check the Return Policy

Costco has a generous return policy, but it does not apply to all groceries. Perishable items like meat, produce, and dairy are not returnable for a refund if you simply changed your mind. However, if the quality is poor or the item is spoiled before the date, you can return it for a full refund. Keep your receipt for any clearance grocery purchase in case the quality is subpar.

Tools and Strategies for the Savvy Shopper

Maximizing grocery savings at Costco requires a system. Use these tools and strategies to stay organized.

The Costco App and Online Inventory Check

The Costco app does not show real-time inventory for individual stores, but it does display current warehouse deals and coupons. Use the "Warehouse" tab to see what is on sale at your local store. You can also check the online-only deals, which sometimes offer deeper discounts on bulk non-perishables than the warehouse. For clearance items, you must visit the store in person.

The Price Book Method

Keep a simple spreadsheet or notes app with the lowest price you have seen for your staple items. For example, if you know that a 48-pack of Kirkland water is $3.99 at full price, and you see it at $2.97 on clearance, you know it is a great deal. Track the prices of your top 20 grocery items over a few months to build your own price book. This eliminates guesswork.

Freezer and Pantry Management

Clearance deals only work if you have space to store them. Maintain an organized freezer and pantry. Use a first-in, first-out (FIFO) system: rotate older stock to the front and place new clearance items in the back. Label everything with the purchase date and the price paid. This prevents waste and ensures you actually use what you bought.

The Buddy System

Splitting bulk clearance items with a friend or family member is a powerful strategy. You can buy a massive pack of meat or a giant box of snacks at a deep discount, divide it, and both save. Coordinate with a neighbor or coworker who also shops at Costco. This works especially well for perishable items and seasonal foods.

When to Walk Away: Recognizing a Bad Deal

Not every markdown is a good deal. Learn to recognize when to pass, even if the price tag ends in .97.

Expired or Near-Expired Non-Perishables

Some clearance items are close to their "best by" date. For dry goods like pasta, rice, and canned goods, this is usually fine for months or years. But for items like protein bars, vitamins, or oils, the quality degrades after the date. Check the expiration date before buying. If it is within 30 days and you cannot consume it in time, skip it.

Bulk Sizes You Cannot Store Properly

A 25-pound bag of flour at 50% off is a terrible deal if you do not have a pest-proof container to store it. Similarly, a giant box of produce that requires refrigeration is wasted if your fridge is already full. Only buy clearance items that fit your storage capacity.

Brands You Do Not Like

It is tempting to buy a cheap brand because it is on clearance. But if you know your family prefers a specific brand of ketchup or cereal, the savings are not worth the waste. Stick to brands you know you will use. The .97 price is only valuable if the product gets consumed.

Practical Takeaway

Grocery savings at Costco are not about luck; they are about understanding the markdown system. Focus on the .97 price tag as your primary signal for deep discounts, check for the asterisk to know if the item is being discontinued, and time your shopping for midweek afternoons. Combine your Executive Membership and Costco Visa for an extra 4% back, and always compare unit prices. Avoid buying perishables you cannot use, and maintain an organized pantry to prevent waste. By treating Costco sales as a system rather than a random event, you can consistently cut your grocery bill by 20-40% on the items you actually need.