Checkout.com Best Buy news landed on Tuesday, September 8, 2026. Checkout.com said it will support the next phase of Best Buy’s Marketplace payments infrastructure as the retailer expands third-party selling on BestBuy.com and the Best Buy app. Specifically, it will handle card acquiring plus pinless and debit routing. That is essentially the whole announcement: a payments processor is plugging into a marketplace that is getting bigger.

What the Checkout.com Best Buy Release Says

Checkout.com’s release describes technology built to adapt as Best Buy’s needs evolve. It covers current payment flows while laying a foundation for future payment methods, geographies and commerce models. It also promises dedicated enterprise support for settlement complexity across channels. Chief Revenue Officer Antoine Nougué pointed to modular technology, AI-powered payment optimization and a hands-on approach.

There is no dollar figure, no contract length and no detail beyond acquiring and debit routing about what changes in the technology stack. Read that again: it is almost entirely forward-looking language about needs that have not been specified. Marketplace deals usually come with at least some specifics, such as split-settlement mechanics or seller onboarding volume. By that standard, this release comes up short.

Checkout.com Best Buy Plugs Into a Mirakl Marketplace

Context helps explain the narrow scope. Best Buy launched its U.S. marketplace in August 2025 on Mirakl’s platform. It is also the retailer’s second attempt, after an earlier U.S. marketplace ran from 2011 to 2016 and was shut down after generating only about 1% of revenue.

Because Mirakl already runs the marketplace layer, the Checkout.com Best Buy role looks like a payments-processing slot rather than a full marketplace rebuild. Card acquiring and pinless debit routing matter here because routing debit over lower-cost networks can trim processing fees at scale. Those savings are real, but they are plumbing improvements rather than a strategic reinvention.

Checkout.com Best Buy and the Public Marketplace Numbers

The biggest gap in the release is size, but that gap is not total. On its March earnings call, Best Buy said its U.S. marketplace generated about $300 million in GMV in fiscal Q4 2026, with more than 1,100 third-party sellers. Executives also said more than 80% of marketplace returns come back through physical stores.

That changes the reading of the Checkout.com Best Buy release. A marketplace running around $300 million a quarter is growing, but it is still small next to Best Buy’s first-party business. In that light, a modest processing deal with modest disclosure fits the scale.

Fintechbits analysis

Why Checkout.com Best Buy Still Solves a Real Problem

The underlying business problem is real. Marketplace payments get harder as a seller roster grows. They bring split settlement across parties, chargeback liability shared between platform and seller, and reconciliation that gets messier with every new category. Cross-currency payouts would only enter the picture if Best Buy expands beyond the U.S., which the release hints at by mentioning future geographies. Amazon, Walmart and Target all had to solve versions of this as their marketplaces scaled, part of the broader embedded finance shift in retail.

So the need for a stronger payments partner is legitimate. The release simply does not show how Checkout.com Best Buy work will meet it beyond acquiring and routing.

What to Watch Next for Checkout.com Best Buy

Best Buy has already put numbers on marketplace sellers and GMV, so the next test is different. Watch whether updated marketplace GMV appears in upcoming earnings, and whether Best Buy credits payments changes with lower costs or higher authorization rates. Also watch for any move into new geographies, which would bring the cross-border payout complexity Checkout.com is built for. That matters for the wider future of payments in retail marketplaces.

Fintechbits covers payments, retail commerce and marketplace infrastructure. Nothing here constitutes financial or investment advice. All analysis represents the editorial views of Fintechbits.