Costco arrived on DoorDash and Uber Eats in the same week of September 2026, and the first thing the points crowd noticed was the card. Costco warehouses take Visa only, so an American Express Gold Card has never earned anything inside one. Order the same groceries through DoorDash or Uber Eats and you pay the app, not Costco, and the app has been posting as a restaurant on Amex statements, where the Gold earns 4X. Four points a dollar on Costco groceries, for the first time.
We priced one cart to find out what those points cost. The short version: DoorDash charges 11.25% more on every item than the shelf tag in the warehouse and Uber Eats charges 12%, then the fees land on top. The 4X is worth about 8 cents on the dollar at the roughly 2 cents a point our data uses, so on its own it never catches the markup. What does catch it is a credit, and each app has one card that carries it. DoorDash with the Sapphire Reserve's promo got to about even. Uber Eats with the Gold's Uber Cash got a little under. The third app came in well under the warehouse, before and after its credit. Only one of the three did. We take them in that order, because the order is the point.
Prices below are as of September 21, 2026, at our local warehouse and in the apps set to that warehouse. They will move. The pattern is the finding, not the pennies.
Why the 4X exists at all
Costco's own list of accepted payment methods for U.S. warehouses starts with "All Visa Cards" and never mentions American Express. That is the whole reason this became a story.
The Gold Card's terms give 4X "on the first $50,000 of eligible purchases per calendar year at restaurants worldwide," and 4X at U.S. supermarkets, with a bracket that matters here: "superstores, convenience stores, warehouse clubs, and meal-kit delivery services are not considered supermarkets." So Costco the merchant is out on both counts. The only exclusion Amex writes for delivery apps is "purchases made through third-party food delivery services outside of the U.S." A U.S. DoorDash or Uber Eats order is charged by the app, and the app's merchant category is what Amex sees. That is why people are reporting 4X on Costco carts. It is the app's category, not Costco's, and Amex can recode it. Check the first order on your statement before you build a habit around it.
DoorDash's announcement on September 17, 2026 says members "can link an active Costco membership and complete their order" for "more than 4,000 products" from "all Costco warehouses nationwide." Uber's release the day before covers "nearly 600 Costco locations" in 47 states and tells members to "add your Costco membership account at checkout." Neither release says a word about how the items are priced. Our cart does.
The cart, three ways
We photographed the shelf tags in the warehouse, then built the same five-item cart in DoorDash and in Uber Eats.
The warehouse tag. The rebate carries through to both apps; the markup sits on top of it. Photo: RewardsGuru.club
| Item | Warehouse register price | DoorDash | Uber Eats |
|---|---|---|---|
| Whole pomegranates, 4 lb | $11.99 ($14.99 less a $3.00 instant rebate) | $13.34 (shown as $16.68 less the rebate) | $13.79 (shown as $16.79 less the rebate) |
| Organic strawberries, 2 lb | $10.39 | $11.56 | $11.64 |
| Organic raspberries, 12 oz | $5.59 | $6.22 | $6.26 |
| Sambazon organic dragon fruit blend, 64 oz | $5.39 ($7.89 less a $2.50 instant rebate) | $6.00 (shown as $8.78 less the rebate) | $6.34 (shown as $8.84 less the rebate) |
| Organic blueberries, 18 oz | not photographed; both apps put it at $8.99 | $10.01 | $10.07 |
| Five items | $42.35 (using $8.99 for the blueberries) | $47.13 | $48.10 |
| Markup on the items | +11.3% | +13.6% | |
| At checkout | $54.32 | $51.27 | |
| Fees and tax on top | $7.19 | $3.17, with Uber One | |
| Delivered cost over the warehouse | +28% | +21% |
The two apps are built differently. Every DoorDash price is the warehouse price times 1.1125, rounded to the cent, on the shelf price and on the post-rebate price alike. Uber Eats marks the shelf price up 12% and then subtracts Costco's instant rebate as the same flat dollars, so the two rebated items cost more there: the pomegranates are $13.79 against DoorDash's $13.34. On the three items with no rebate, the apps are within a few cents of each other. Costco's instant rebates do reach both apps either way. The blueberry tag is the one we did not photograph; both apps' prices divide back to $8.99 at their own markups, and we are naming it as an estimate rather than folding it in quietly.
DoorDash's checkout: $47.13 of items, $54.32 to pay. A second DoorDash screen for the same cart read $56.32, a $2 difference the app did not itemize. Screenshot: RewardsGuru.club
Uber Eats: $48.10 of items, $51.27 after the service fee and tax. The Uber One badge credited $7 of savings on this order, and the app was asking for $6.40 more to zero the service fee. Screenshot: RewardsGuru.club
Then checkout. DoorDash took $47.13 of items to $54.32, so $7.19 in fees and tax, another 15%. Uber Eats took $48.10 to $51.27, $3.17 in fees and tax, with Uber One waiving what it waives. Against the warehouse basket of $42.35, the delivered cart cost 28% more on DoorDash and 21% more on Uber Eats.
Grubhub carries Costco too, and that order is really an Instacart order. Instacart's own help page covers grocery orders placed through the Grubhub app, and says that after you order, "an Instacart shopper fulfills and delivers it." So the Grubhub screen is the closest look we got at Instacart-side Costco pricing. A six-item cart listed at $51.69 dropped to $43.50 once a Costco membership was linked, a line the app labels "loyalty applied." Then a $3.04 service fee, a $0.87 Grubhub fee plus $0.07 tax, a $2.00 discount for taking a scheduled window the next day, and a $5.99 delivery fee cancelled by Grubhub+, for a subtotal of $45.48. Net fees of $1.98 on the basket, the lightest of the three. Instacart's page sets the rule: Grubhub+ members get "$0 delivery fees on eligible grocery orders" with a subtotal of at least $35. We could not line those six items up against the shelf tags, so that column is a fee comparison rather than a per-item one. Hold on to the $45.48; it comes back at the end.
Grubhub's checkout, with the membership pricing and every fee on one screen. Screenshot: RewardsGuru.club
What the 4X is worth against that
On DoorDash, $54.32 earns 217 points. At about 2 cents each with transfer partners, that is $4.35. You paid $11.97 more than the warehouse for the same food, so you are $7.62 behind. On Uber Eats, $51.27 earns 205 points, about $4.10, against $8.92 extra, so $4.82 behind. Both are the generous reading: they value the points at their best use, not at the 1 cent or less they fetch as a statement credit.
The warehouse side has its own rewards you give up. The Costco Anywhere Visa pays 2% on Costco purchases and an Executive membership pays roughly 2% on top, both settled once a year as certificates. On a $42.35 basket that is about $1.69, which widens the gap to $6.50 on Uber Eats and $9.30 on DoorDash. Neither DoorDash nor Uber mentions Executive rewards on app orders, and Costco's grocery FAQ promises the 2% only on its own Same-Day service.
For the 4X to pay for the trip, the markup plus fees would have to come in under 8% of the order. On our cart it was 21% on Uber Eats and 28% on DoorDash. No basket size fixes that, because the item markup alone, 11.25% or 12%, is above the 8% the points return. So the question is never whether the points cover the app. It is which card credit does.
We compared these two cards for dining in Sapphire Preferred vs Amex Gold for dining, and the Gold's other changes this year are in the April 2026 refresh.
Match the app to the credit, worst to best
The three apps price Costco differently and take different card credits. Here is what each pairing did to our cart, in the order most people would try them.
DoorDash with the Sapphire Reserve: about even. Chase's card page gives DashPass members up to $25 a month on DoorDash: a $5 promo for restaurant orders and "two $10 promos each month to save on groceries, retail orders, and more," available through December 31, 2027. A Costco cart is a grocery order, so it takes one of the $10 promos. The same page describes DashPass as "$0 delivery fees and reduced service fees" on eligible orders. Take $10 off the $54.32 checkout and you are at $44.32 before DashPass trims the fees further, and the Reserve's 3X on dining adds about $2.66 if the order posts in that category. That is roughly even with the warehouse, twice a month, on orders sized around $50. The Sapphire Reserve carries a $795 fee, so nobody should get it for this, but if you already hold it the promo is the piece that makes a DoorDash Costco order break even. The Sapphire Preferred gets the same $10 promo once a month.
Uber Eats with the Gold's Uber Cash, or the Platinum's: a little under the warehouse. Amex's terms give Gold Card Members "$10 in Uber Cash each month," redeemable once the Gold is added as a payment method in your Uber account, and the balance expires "on the last day of each calendar month." Put that $10 on the $51.27 Uber Eats order and the delivered price is $41.27, which is $1.08 under the warehouse, and the 4X on the $41.27 you still charge returns about $3.30. The Platinum's page gives "$15 in Uber Cash each month, plus a bonus $20 in December," for U.S. rides and orders, which takes the same order to $36.27 at 1X. Both need Uber One on the account to keep the fees at $3.17, and both are use-it-or-lose-it money: if you already spend the Uber Cash on rides, this is not new value.
Grubhub with the Amex Gold: the one that beat the warehouse. Grubhub is where the Costco order gets interesting. It was ahead before any card entered the picture. Costco member pricing through Instacart brought the six items to $43.50, Prime's free Grubhub+ removed the $5.99 delivery fee, and the net fees were $1.98, so the delivered cart was $45.48. That is roughly what the cart costs in the warehouse, and it is the only app where that was true; DoorDash and Uber Eats were $9 to $12 over for five items. The credit is what turns even into a win. The Gold's $10 monthly dining credit is a Grubhub benefit by Amex's own description: up to $10 in statement credits a month "when you pay with the Gold Card at Grubhub," enrollment required. Grubhub+ comes free with Amazon Prime, which is what zeroed the $5.99 delivery fee on our screen, and a scheduled next-day window took another $2 off. The six-item Costco cart came to $45.48 after every fee. Take the $10 credit and Grubhub charged $35.48, and the 4X on that returns 142 points, about $2.84. The app's own list price for those items was $51.69 before Costco member pricing, and our five-item cart cost $42.35 in the warehouse, so a six-item cart of the same kind lands in the mid-$40s there. Grubhub without the credit sat at the warehouse price; with it, it came in a full basket of berries under. Amex's terms carry one caveat worth quoting: a transaction may not be eligible "if it is for a non-dining purchase," so watch the first statement to confirm the credit posts on a grocery cart.
Three smaller levers. Uber's release adds that Uber One members get "no Uber fees on eligible grocery and retail orders over $60," at select stores; our $48 cart was under the line, and the app said so: "Add $6.40 to get $0 Service Fee." The same release says Uber and Uber Eats gift cards are on sale for a limited time at participating Costco locations and on Costco.com at "$79.99 for $100 of value," a 20% discount that shrinks the premium but earns no 4X on the part the gift card covers. And Costco's own Same-Day delivery is direct about its pricing: its grocery FAQ says item pricing "is higher than your local warehouse" to cover Instacart's service and delivery fees, and that "Costco makes no additional profit from these fees," while promising the 2% Executive reward "on the original warehouse sell price," before the markup and delivery costs. We did not price our cart there, so we are not putting a markup number on it.
The dragon fruit blend: $5.39 on the shelf, $6.00 on DoorDash, $6.34 on Uber Eats, the rebate intact everywhere. Photo: RewardsGuru.club
Where the memberships come from
Every fee number above assumed a membership, and most of them are already sitting in a wallet or an Amazon account.
- Uber One. The Platinum Card's page offers up to $120 in statement credits a calendar year after you buy "an auto-renewing Uber One membership with the Card." The same page gives Platinum holders "$15 in Uber Cash each month, plus a bonus $20 in December," for U.S. rides and orders. Put $15 on our $51.27 Uber Eats order and it lands at $36.27, six dollars under the warehouse, though the Platinum earns 1X there, not 4X. Gold holders have a one-time $96 Uber One credit from the card's 60th anniversary, through October 30, 2026, covered in our April refresh notes. And Uber's Costco release offers eligible members half off an annual Uber One membership for the first year.
- DashPass. Chase attaches a complimentary year of DashPass to the Sapphire Reserve, the Sapphire Preferred, the Sapphire Reserve for Business, the World of Hyatt card, the Marriott Bonvoy Boundless and Bountiful, and the Southwest Priority, all to be activated by December 31, 2027. The Preferred also gets one $10 non-restaurant DoorDash promo a month, so a Costco cart on DoorDash gets the same $10 off there as on the Reserve, once instead of twice. Robinhood's Platinum card carries DashPass as well.
- Grubhub+. Amazon's page gives Prime members "all the benefits of a Grubhub+ membership for free," including "unlimited $0 delivery fees, reduced service fees" on eligible orders that meet the subtotal minimum. That is the $5.99 that disappeared on our Grubhub screen.
- Instacart+ and Instacart credits. Costco is on Instacart's own app too, and several Chase cards pay for it: the United Explorer and United Business cards carry $10 a month in Instacart credits, the United Club cards $20 a month with an Instacart+ membership, and the Southwest Plus, Premier and Priority cards $10 a month plus three months of Instacart+, all for purchases made directly through Instacart. The United versions run through the end of 2027. Those credits do the same job on an Instacart Costco order that the Reserve's promo does on DoorDash.
Each of these is a membership someone else is already paying for. None of them is a reason to open a card for Costco delivery.
The rule
Buy Costco through an app when a credit pays the markup, not when a multiplier does, and pick the app your card already pays for. With an Amex Gold, that is Grubhub: Instacart's member pricing and Prime's Grubhub+ already put it at warehouse money, the $10 dining credit puts it under, and the 4X is extra. With Uber Cash unspent, Uber Eats comes out a dollar or six under the warehouse. With a Sapphire Reserve or Preferred, DoorDash gets to even. Each works once or twice a month, on a cart sized around the credit.
For points alone, walk in. The best card at the register is still a Visa, and we ranked them in the best card to use at Costco. The convenience is real, and paying 21% to 28% for it is a fair choice on a busy week. Just do not tell yourself the points covered it.
Related articles
- Amex Gold vs Amex Platinum (2026): When Each Card Wins, and Why You Might Want Both
- Card Credits That Reset October 1: What to Use by September 30, 2026
- Chase Sapphire Reserve Turns 10: $1,050 in Offers With Two Different Deadlines
- Best Credit Cards for Groceries (2026): The Real Cashback Math
Do this with your own numbers
- Purchase optimizer — run your own spending through the same numbers this article used
- Bonus tracker — today's welcome bonuses, verified on the issuer's page