First-order effects

• Small businesses on Square can now offer customers monthly installment plans without building their own financing relationships, turning a capability previously reserved for big retailers into a checkbox feature.
• Square Capital's book of business broadens from merchant cash advances to consumer credit originated through its sellers' checkouts.

Second-order effects

• Rival point-of-sale and payments providers face pressure to bundle comparable financing into their own terminals and software, since a seller whose checkout offers payment plans has one more reason not to switch processors.
• The feature deepens merchant lock-in: installments run through Square's system, so each financed sale reinforces both the payments relationship and the data Square uses to underwrite future loans.

Third-order effects

• If the pattern holds, point-of-sale vendors consolidate into full-stack financial services platforms — payments, advances, consumer financing, and eventually banking-adjacent products like the Square Card debit card that followed months later — with underwriting driven by transaction data the platform already sees.
• Consumer credit approval migrates from banks and card issuers toward the software layer where the purchase happens, raising the question of how regulators treat underwriting done by payments companies rather than licensed lenders.