Costco Memberships for Single People: The Math I Was Wrong About

For about six years I told anyone who asked that Costco didn’t make sense for one person. I had the whole speech ready. You’ll throw out half the produce. You’ll eat the same thing eleven days in a row and hate your life by day four. The $65 membership only pays off if you have three children and a chest freezer.

I was half right, which is another way of saying I was half wrong.

The part I had correct: if you walk into Costco trying to do a weekly grocery run for one, you will lose money. The pack sizes in the produce and bakery sections are built for families, and nothing will make you resent your own kitchen faster than a three-pound clamshell of strawberries going soft on day five. That math is real.

The part I had wrong: I was judging the entire warehouse by the produce section. Costco is not primarily a grocery store. It’s a gas station, a pharmacy, an optical shop, a tire center, and a wholesaler of specific dry and frozen goods that happen to keep forever. If you build your Costco trip around those — and treat fresh produce as a rare bonus — the $65 pays for itself, sometimes several times over, for a single person. I run the numbers on mine every year. I keep re-upping.

Here’s what I wish someone had told me in 2019, when I was writing off the membership on vibes.

The pack-size objection is category-specific, not store-wide

The argument against Costco for singles always collapses into one sentence: “the packs are too big.” But “too big” is only meaningful per category. A 30-roll pack of Kirkland toilet paper is not “too big” for a single person — it’s a year’s supply of a thing that does not spoil, bought at roughly 30% less per sheet than the grocery-store equivalent. “Too big” in that sentence just means “takes up closet space.” Closet space is cheap. Money is not.

So the real question isn’t “is Costco for singles.” It’s “which parts of Costco are for singles.” Here’s how I split it in my head.

Things that are right-sized for one person, no hedging

Start with anything shelf-stable. A roommate and I split a 30-roll Kirkland TP pack in 2022 and I still had my half the following July. Paper towels and trash bags work the same way; kitchen parchment too. None of it expires, none of it wants prime real estate. Closet space is cheap; the savings per sheet are not. A three-liter Kirkland extra virgin olive oil runs about $30 and lasts me a year, compared to close to $60 for the same volume in grocery-store glass bottles; I decant into a smaller bottle by the stove so the working supply doesn’t go rancid from light. The same logic covers vinegar, soy sauce, peanut butter, and the 20-pack of RXBARs that runs about 30% under Target. If you eat a lot of salad, bagged baby spinach is the one fresh-produce category that works for a single person, and only because I’ll eat it every night for a week without revolting.

Gas. The single biggest argument for a Costco membership if you drive. I’ll come back to the math below, but Costco gas in my area runs 25–40 cents a gallon under the nearest Shell or Mobil. For a driver doing 12,000 miles a year in a 28-mpg car, that’s around $160 in savings — already 2.5x the membership fee, before anything else.

Prescriptions. Costco Pharmacy is famously one of the cheapest in the country, and you don’t need a membership to use it (federal law). But members pay less on certain drugs, and the executive-tier rewards can apply. I fill a boring generic there for $4 a month; my previous pharmacy wanted $22.

Tires and the installation package. Costco tires come with lifetime rotation, balance, and flat repair. For a single driver keeping one car for ten years, this is hundreds of dollars in labor nobody ever factors in.

Cheese that freezes. Kirkland shredded mozzarella comes in two-pound bags. If you freeze it in 8oz portions the day you buy it, it thaws fine and costs about half the grocery-store rate per pound. Hard cheeses — parm, manchego, aged cheddar — freeze well in blocks too.

Coffee beans. A three-pound bag of Kirkland’s Colombian (roasted by Starbucks, incidentally) costs about what a one-pound bag of mid-tier specialty coffee costs. I pour half into an airtight jar, freeze the rest, and the frozen half tastes identical four months later.

Salmon and some other freezer-friendly proteins. Last October I paid $14.99/lb for farmed salmon at Whole Foods. Same week, Costco had wild Alaskan sockeye for $9.99/lb in a two-pound pack. I portioned it into six pieces, vacuum-sealed them, and ate one every ten days. Better fish, roughly 35% less per pound, and I had dinner planned for two months with no effort.

Things that don’t work, and I’ve stopped pretending otherwise

Costco’s bakery is a trap. I’ve bought the muffins. I’ve bought the croissants. I ate the first four, got sick of them, and watched the rest go stale. A six-pack of bakery muffins for $7 is not a deal if you eat two of them.

Three-pound clamshells of berries. Bagged apples larger than my head. Pre-made deli trays designed for parties I’m not having. A gallon of mayo — I can’t even picture the single person who should buy this. Rotisserie chicken is the one exception in this zone; at $4.99 it’s priced like a loss leader, and one bird is three meals for me if I’m organized about it.

The general rule I’ve settled on: fresh food that spoils in under ten days is almost always the wrong purchase, unless you’re willing to portion and freeze it within 24 hours of getting home. If the answer is “I’ll probably eat it all eventually,” you’ll throw it out.

The gas math is the easiest case

If you own a car and drive regularly, the membership can pay for itself on gas alone. Here’s how I sanity-check it.

My friend Tom drives from Brooklyn to LaGuardia about twice a month for work, plus weekends upstate. He does roughly 10,000 miles a year in a Subaru Forester that gets 27 mpg. That’s about 370 gallons of gas. The Costco in Sunset Park runs about 35 cents under the Mobil on his usual route. Over a year, 370 × $0.35 = $129.50 in savings. Minus the $65 membership, he’s up $64 — and we haven’t counted anything else he buys there.

That’s a light commuter. A sales rep who drives 25,000 miles a year at the same spread saves $320 on gas, netting $255 after membership. Heavy drivers clear the fee by March.

The one honest caveat: the nearest Costco gas to me in Brooklyn has a 15-minute line on Saturday mornings. If your time is worth $50/hour and you’d spend 30 extra minutes a month waiting, you’re paying $25/mo in opportunity cost for $10–15 in gas savings. Go off-hours. Tuesday at 2pm has no line.

The services people forget

This is where Costco quietly outperforms the grocery-store comparison, because the grocery store doesn’t do any of this.

Eye exams and glasses. An independent optometrist in my neighborhood charges $180 for an eye exam and $340 for a basic frame-and-lens combo. Costco Optical did the exam for $85 and the frame-and-lens for $180. I needed a new pair in 2023, tried Costco mostly as an experiment, and left kicking myself for not doing it five years earlier.

Hearing aids. Costco’s Kirkland Signature hearing aids cost $1,599 a pair as of 2025. The equivalent from a chain audiologist is often $4,000–6,000. If you or a parent needs them, this alone justifies the membership forever.

Travel. Costco Travel is not magic — for most trips I can match or beat it with a few minutes of searching. But for rental cars it’s often meaningfully cheaper and the cancellation terms are flexible. I’ve saved $40–60 on individual rental-car bookings maybe six times in the last four years.

Costco Anywhere Visa. 4% cash back on gas (up to $7,000/yr of spend), 3% on dining and travel, 2% in-warehouse. You need to be an executive member to hold it. If you use it even moderately, the cash back stacks with the gas savings.

Gold Star vs Executive, and where the break-even sits

The standard membership is $65 ($60 until last year). The Executive membership is $130 and kicks back 2% on most Costco purchases, capped at $1,000/year.

The math everyone cites: $65 ÷ 2% = $3,250. Spend more than $3,250/year at Costco and Executive pays for itself.

For a single person who mostly buys gas, TP, coffee, and some frozen stuff, $3,250 is a stretch. I’d guess I hit around $2,400/year at my current usage. On paper, Gold Star is the right tier for me.

The thing people forget: Costco will refund the $65 difference if you downgrade mid-year and didn’t hit the threshold. So the worst case of trying Executive is you break even. If you’re on the bubble, try Executive one year, track your spending closely, and downgrade if you fell short. I did this in 2024, came in at $2,100 in purchases, got my $65 back at the membership desk in about four minutes.

The Costco tax is real. Don’t pretend otherwise.

Every honest piece of Costco advice has to address this, and most don’t. You will walk in for gas and walk out with a $90 cashmere sweater you didn’t need. You will buy a three-pack of sheet pans because they cost $18 and you vaguely remember needing one. Costco’s entire store design — the treasure-hunt layout, the rotating seasonal aisle, the zero signage by design — is engineered to make you buy impulse items.

The trap I fell into my first year as a member: I “saved” maybe $200 over twelve months on groceries and gas, and spent $340 on a bread maker I used four times, a Dyson cordless on clearance, and two fleece jackets. My net position was negative, and I was smug about the savings the whole time.

What fixed it for me was a simple rule. I write a list before I go. I don’t walk any aisle that isn’t on the list. If I see something I want that isn’t on the list, I take a phone photo, leave the store, and decide whether I still want it forty-eight hours later. Nine times out of ten I don’t. The tenth time, it was a legitimate need and I go back.

When I tell a single person to skip Costco outright

The membership is not for everyone, and I don’t buy the “it pays for itself for anyone” line.

Skip it if:

• You don’t own a car (the gas savings alone carry the deal for most people)
• You live in a walkable city and eat out or order in most meals — you’d need to cook enough at home for the staples to matter
• Your apartment has no storage; a 30-pack of TP and a three-liter olive oil need a place to live
• You’re the kind of shopper who cannot resist the impulse aisle, and you know this about yourself

If three of those four apply to you, do not get the membership, no matter what the math looks like on paper. The discipline cost is higher than the savings.

What I think after seven years of membership

Costco for singles is a better deal than conventional wisdom says, but only if you treat it as a pharmacy and a gas station first, with some hardware-store kitchen staples on the side, and barely a grocery store at all. Walk in with a list of six things. Leave with eight. Spend $110. Save $15 on gas on the way out. Do this nine times a year and you’re ahead of the membership fee and the Costco tax combined.