San Francisco, embedded finance partnership, announced September 10.

Parafin and Tekion have launched a new B2B BNPL product called Pay Over Time, which lets dealership customers split invoices and bills into biweekly installments instead of paying upfront or negotiating net terms with suppliers. It’s embedded directly into Tekion Pay, the payments layer inside Tekion’s Automotive Retail Cloud, so approval happens at checkout rather than through a separate financing application.

The underwriting is the actual story here. Parafin qualifies businesses based on real bank transaction data rather than a personal credit score or a credit bureau pull, and buyers can choose Pay-in-4, Pay-in-8 or Pay-in-12 plans with no personal guarantee required.

That’s a meaningful shift from how B2B BNPL and B2B financing more broadly have traditionally worked in this corner of the economy, where a dealership’s ability to get flexible payment terms depended heavily on how long it had been doing business with a given supplier and how good those relationships were. Lines of credit are issued by Celtic Bank, the same partner bank a long list of fintech lenders use to originate credit without holding a banking charter themselves.

Parafin has been building toward this kind of B2B BNPL product for a while. It already runs embedded financing on Amazon, Gusto and DoorDash, has extended more than $35 billion in offers to small businesses, and recently closed a $300 million forward-flow deal with a New York asset manager to fund more of this lending off its own balance sheet.

Tekion, for its part, has been stacking payment partnerships onto its ARC platform all year, including a separate deal with Klarna announced in May that brought consumer-style flexible payments into the service lane. Pay Over Time is the B2B counterpart to that same strategy: turn the dealership software platform into the place where money moves, not just where repair orders get logged.

The part worth being skeptical about is how this actually performs when a dealership’s cash flow gets choppy, which happens often in an industry exposed to interest rates, used car pricing swings and consumer demand. Cash-flow underwriting is more forgiving to a fast-growing business with thin credit history, but it can also be more volatile than a traditional credit score during a downturn, since bank transaction patterns can shift quickly in ways a FICO score doesn’t.

Parafin’s bet is that its data gives it an earlier read on deteriorating cash flow than a credit bureau would, and it’s had a few years of loan performance across other verticals to test that thesis. Whether it holds up in auto retail, a sector with its own particular seasonality and supplier dynamics, is a separate question the two companies aren’t addressing in this release.

How the B2B BNPL Underwriting Actually Works

The mechanics of this B2B BNPL product are worth spelling out, since they diverge from how most buy-now-pay-later products get built. Parafin isn’t scoring a business owner’s personal credit file, it’s scoring the business’s own bank transaction history, the same underwriting approach it already uses across Amazon, Gusto and DoorDash sellers. That makes the product more accessible to newer dealerships without a long credit history, though it also means Parafin is making a bet that transaction-level cash flow data predicts repayment better than a FICO score does in an industry as cyclical as auto retail.

Readers can find Parafin’s own description of its underwriting approach on the company’s site, and more B2B fintech coverage in Fintechbits’ startup news archive. Fintechbits covered a related compliance technology story today in its report on Wolters Kluwer’s new bank compliance analytics module, another sign of vendors racing to automate risk monitoring in real time.

The more interesting number to track isn’t the launch itself, it’s how many of Tekion’s dealership customers use it inside the first two quarters, which will say more about whether cash-flow underwriting actually beats net terms in practice than anything in this announcement does.