As Costco goes digital, buy-now-pay-later financing becomes a new lever for growth — and a signal of where loyalty is headed.
The warehouse king finally brings pay-over-time online. But this isn’t just about flexibility — it’s about future-proofing Costco’s ecommerce play.
Costco adds Affirm BNPL: buy bulk now, pay later
The gods of bulk just embraced Buy Now, Pay Later.
Costco has officially teamed up with Affirm to offer online shoppers a pay-over-time option, giving members the ability to split their purchases into monthly installments — right at checkout. The deal was dropped May 8 via Affirm’s shareholder letter, and it marks a quiet but strategic expansion of Costco’s ecommerce ambitions.
It also puts a BNPL giant squarely in the corner of one of America’s most trusted retailers. So yeah — this one’s worth watching. 👀
The catch: it’s online only (for now)
If you’re picturing a grandma financing 400 rolls of Kirkland toilet paper in-store — hold that thought.
For now, the Affirm integration is strictly Costco.com. That means online shoppers (with approval) will see Affirm as a payment option, likely competing for eyeballs against the Costco Anywhere Visa and other plastic-friendly methods. It also builds on Costco’s previous BNPL toe-dip: the Citi Flex Pay partnership launched back in 2023 for Visa cardholders.
But make no mistake — this isn’t just a checkout feature. It’s a loyalty play.
Costco is betting that BNPL will grease the wheels for bigger carts, repeat orders, and deeper digital engagement from younger, credit-averse shoppers.
Why it matters: ecommerce is Costco’s next battlefield
Costco’s core business is still brick-and-mortar dominance, but the long game is digital.
With rising inflation, tighter wallets, and Gen Z’s growing distrust of traditional credit, pay-over-time is table stakes in ecommerce now. According to PYMNTS, the U.S. BNPL market has exploded to $175 billion, with 38% of consumers using it in late 2024 — up from 24% the year before.
Affirm knows this trend better than anyone. In just the last month, they’ve:
- Partnered with Revolve Group to offer BNPL on fashion and beauty 🧖♀️
- Teamed with UATP to let travelers pay flights over time ✈️
- Expanded their tools via J.P. Morgan’s Commerce Platform 🏦
This Costco deal fits right in. But unlike luxury fashion or airfare, Costco is pure utility. Household staples, appliances, tech, seasonal swings — stuff that’s often too big for debit cards but too boring for revolving credit.
This is about BNPL going mainstream.
Operator POV: this is the ecommerce loyalty loop in action
Look beyond the checkout button — here’s what this actually builds for Costco:
✅ Higher AOV: Affirm users spend more than non-BNPL shoppers. According to PYMNTS, customers using BNPL by choice spend $777 on average, vs. $576 for those using it out of necessity.
✅ Broader demo reach: Millennials and Gen Z don’t want credit card debt. This is how you reach them — especially as inflation reshapes spending behavior.
✅ Better ecommerce funnel metrics: With cost transparency baked in, BNPL can improve conversion rates and reduce cart abandonment.
✅ More member data: Affirm’s integration gives Costco more visibility into how and why people buy — especially online.
It’s not a gimmick. It’s customer financing as a growth lever — and now, a Costco-level retention tool.
Bottom line: don’t sleep on BNPL 2.0
The first BNPL wave was a trend. The second is infrastructure.
Affirm isn’t just bolting onto brands anymore — it’s getting embedded inside the most resilient models in retail. And as cost-conscious households look for ways to stretch their budgets without playing interest roulette, BNPL becomes not just viable — but essential.
Costco’s move here is smart, quiet, and right on time. Pay attention.
