Open Loop vs Closed Loop Payments
What Are Open Loop and Closed Loop Payments? Definition and How They Work
Definition
Open loop payments use universally accepted payment networks (Visa, Mastercard, and other card schemes or interbank rails) that work across any merchant or institution connected to those networks. Closed loop payments operate within a proprietary ecosystem controlled by a single operator, such as a retailer's gift card, a transit authority's contactless card, or a platform's internal wallet, and can only be used within that operator's network.
How it works
An open loop payment instrument connects to a shared payment infrastructure that any compliant merchant or financial institution can access. A Visa-branded debit card can be used at any Visa-accepting merchant globally: the cardholder's bank (the issuer), any accepting merchant's bank (the acquirer), and the card network itself are all separate entities operating under shared scheme rules. The openness is the interoperability: no single entity controls both the issuance and acceptance sides.
A closed loop payment instrument is issued and accepted within a single proprietary ecosystem. A Starbucks gift card can only be used at Starbucks. An Amazon gift card can only be used on Amazon. A London Oyster card works on Transport for London services. The operator controls both issuance (loading value onto the instrument) and acceptance (where the instrument can be spent), creating a contained economic loop.
Hybrid instruments exist between these poles. Prepaid cards issued on Visa or Mastercard rails are open loop (usable anywhere those networks accept payments) but may have restricted spending categories or geographic limits. Shopping centre gift cards usable at any tenant within the centre are semi-closed loop: broader than a single merchant but narrower than a universal open loop card.
Transit contactless systems (London, Singapore, Hong Kong) have moved toward open loop acceptance: commuters can tap a standard Visa or Mastercard contactless card or digital wallet instead of loading a proprietary transit card. This is an open loop intrusion into traditionally closed loop territory, improving user convenience at the cost of the transit operator's ability to collect transaction fees and hold float.
Why it matters
The choice between open and closed loop shapes the economics and user experience of a payment product. Closed loop instruments provide the issuing operator with significant economic benefits: float income from unspent balances, breakage from unclaimed funds, and the ability to capture all transaction fees (no interchange paid to a card network). They also enable highly tailored user experiences within the ecosystem.
Open loop instruments provide universal acceptance that closed loop cannot match: a Visa debit card works across millions of merchants globally without any merchant-specific setup. For most everyday payment use cases, open loop wins on convenience because the cardholder does not need to manage multiple closed loop instruments for different merchants.
Platform design decisions around open and closed loop have strategic implications. A marketplace that builds its own closed loop wallet captures float and avoids external payment fees, but faces user friction in getting buyers to load and maintain balances. A marketplace that accepts open loop cards offers zero friction at the cost of processing fees and no float capture. Many platforms blend the two: accepting cards (open loop) while incentivising wallet top-up (closed loop) through rewards or discounts.
With PXP
PXP's open-loop card acceptance can sit alongside closed-loop wallet methods within one checkout. Talk to our team about how PXP can support your card and wallet acceptance.
Frequently asked questions
Is PayPal open loop or closed loop?
PayPal is primarily closed loop within its own ecosystem: PayPal balance transfers between PayPal accounts are internal ledger entries within PayPal's platform. However, PayPal is also open loop in its acceptance: merchants accept PayPal payments as a checkout option alongside cards, and PayPal funds can be withdrawn to bank accounts. PayPal occupies a hybrid position, using closed loop balance management internally while connecting to open loop card and bank rails for funding and withdrawal.
What is float income in a closed loop payment system?
Float income is earned when an operator holds customer funds between the time they are loaded onto a closed loop instrument and the time they are spent. A gift card purchaser who buys a $100 gift card creates $100 of float that the operator holds interest-free. Across millions of gift cards and prepaid wallets, float balances can be significant. The operator earns investment income on this float within applicable regulatory constraints, and retains breakage (the portion of balances never redeemed) as additional income.
Why are transit systems moving from closed loop to open loop?
Transit operators historically used proprietary contactless cards (Oyster, Octopus, EZ-Link) because open loop card infrastructure was too slow for high-throughput fare gates. As contactless card and digital wallet transaction speeds improved, open loop acceptance became viable for transit. Open loop transit acceptance reduces the cost of managing proprietary card infrastructure, eliminates the need for passengers to pre-load transit-specific cards, and improves the experience for occasional users and tourists who can tap any card.
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