Costco is one of those stores where it’s incredibly easy to convince yourself that buying more means saving more. The packages are bigger, the price per item can be lower, and a good deal can make it tempting to toss something into the cart just because it looks like a bargain.
But bulk shopping only saves money if you actually use what you buy.
Some foods go bad before you can get through them. Others lose their flavor or quality after sitting in the pantry for months. There are also household products that simply aren’t worth buying in huge quantities unless you use them regularly.
I’ve learned that a little restraint at Costco can save just as much money as finding a good deal. These are some of the items I’m careful about buying in bulk.
Bread
Bread seems like an easy bulk purchase until you realize how quickly it can go stale.
A couple of loaves might be a great price, but if your household only goes through one loaf every week or two, you could end up throwing part of the package away. Freezing bread is an option, but the texture can change once it thaws.
If you have a large family or eat bread every day, the larger packages may make sense. For smaller households, I usually stick with one loaf at a time.
Milk
Milk has a way of making its way to the back of the refrigerator before you realize it’s getting close to its expiration date. A multi-pack can look like a great deal, but there’s little benefit if you end up pouring part of it down the drain.
Milk also spoils faster once it has been opened.
If your family goes through several containers quickly, buying in bulk may work. If not, smaller containers can help cut down on waste.
Cooking Oil
A huge bottle of cooking oil can be tempting, especially if the price per ounce is much lower. The problem is that oil doesn’t stay fresh forever.
Once opened, many cooking oils can start losing quality over time. If you don’t cook often or only use a small amount at a time, that oversized bottle could sit in the pantry for months.
I prefer buying an amount I know I’ll use within a reasonable period. Keeping oil in a dark glass oil dispenser bottle can also help protect it from light and air.
Fresh Produce
This is probably one of the easiest ways to waste money at Costco.
A giant container of berries, several pounds of salad greens, or a huge bag of vegetables can look like a healthy choice. Then a few days later, you’re staring at produce that needs to be eaten immediately.
Unless you have a large household, meal prep regularly, or share produce with someone else, smaller quantities may be the better buy.
I’d rather pay a little more for food I’ll actually eat than save a few dollars on something that ends up in the trash.
Eggs
Eggs keep for quite a while, but that doesn’t mean every household needs a giant carton.
If you make eggs for breakfast, bake regularly, or have several people eating them, the larger package can disappear pretty quickly. For households that only use a few eggs each week, though, a smaller carton is often easier to finish before the quality starts to decline.
Skincare and Beauty Products
Buying a multipack of your favorite beauty products can feel like a smart move, especially if the price is good. The catch is that many personal-care products have a limited period of good quality after opening.
Mascara, foundation, creams, and other products can sit unused for months while you work through the first container. By the time you get around to the extras, they may no longer be something you want to use.
I’d rather buy one product I know I’ll finish than collect several backups that spend months sitting in a bathroom cabinet.
Spices and Dried Herbs
Spices don’t usually become unsafe just because they’ve been sitting in the cabinet, but their flavor and aroma can fade.
That giant container of paprika or dried oregano might save money at checkout, but it isn’t much of a bargain if you use it once in a while and it takes years to finish.
I usually buy smaller containers, especially for spices I don’t use often. Keeping them in airtight spice jars with labels can also make the pantry easier to keep track of.
Cheese
Cheese is another Costco item that can be tricky for smaller households.
A large package can be a great deal if you’re making sandwiches, cooking regularly, or feeding several people. If you only use cheese occasionally, though, the package may start growing mold before you get through it.
Buying smaller portions means you may pay a little more per ounce, but you’re less likely to throw away food you couldn’t finish.
Condiments
Ketchup, mayonnaise, mustard, salad dressing, and similar products can sit in the refrigerator for a surprisingly long time.
That’s part of what makes them tempting to buy in large containers. But once they’re opened, quality can decline, and some products simply don’t get used quickly enough.
If your family eats ketchup or dressing with nearly every meal, the Costco-sized bottle may be fine. For everyone else, a smaller bottle can make more sense.
Brown Rice
Brown rice has a shorter storage life than white rice because it contains more natural oils.
A large bag may look like a good pantry deal, but if you don’t cook brown rice often, it can sit around for a long time before you finish it.
I’d rather buy a smaller bag and replace it when needed, especially if rice isn’t something we eat several times a week.
Flour
Flour is another pantry staple that can be easy to overbuy.
If you bake bread, cakes, cookies, or other baked goods regularly, a large bag may disappear quickly. If you only pull out the flour a few times a month, that oversized bag can sit around for a long time.
Flour can also absorb moisture and odors and may attract pantry pests if it’s stored poorly.
For occasional baking, I prefer a smaller bag that I can use while it’s still fresh.
Ground Coffee
Anyone who drinks coffee every morning may have no trouble finishing a large container. For occasional coffee drinkers, it’s a different story.
Once ground coffee is opened, it gradually loses some of its aroma and flavor. A bulk package may cost less per serving, but stale coffee isn’t exactly a bargain.
If freshness matters to you, buying smaller amounts more often can make a noticeable difference in the cup.
Soda and Carbonated Drinks
Buying soda in bulk makes sense if your household goes through it quickly. If not, those cans or bottles can sit around for months.
Over time, carbonated drinks can lose some of their fizz and taste less fresh than they did when you first bought them.
So before grabbing the biggest case available, think about how quickly your household actually drinks soda.
Related: 15 Things You Can Do With Club Soda Besides Drink It
Liquid Bleach
Bleach is one of those products people tend to assume will last forever. It doesn’t.
Liquid bleach gradually loses its strength while sitting in storage, so buying several large bottles may not be the bargain it appears to be.
If you only use bleach occasionally, there’s little reason to keep a large supply on hand. A smaller bottle that gets used within a reasonable amount of time is often the more practical choice.
Think About How Fast You’ll Use It
Costco can absolutely save money, but the lowest price per unit isn’t always the lowest total cost.
Before buying a huge package, I ask myself one simple question: Will I actually use all of this before it goes bad, loses quality, or gets forgotten in the pantry?
If the answer is no, I leave it on the shelf. A smaller package might cost a little more upfront, but avoiding food waste and unused products can save more money over time.
