Merchant Account
What Is a Merchant Account? Definition and How It Works
Definition
A merchant account is a type of account that enables a business to accept and process card payments. It is held by an acquiring bank on behalf of the merchant and acts as a temporary holding account where funds from card transactions are deposited before being transferred to the merchant's settlement bank account. Obtaining a merchant account requires underwriting by the acquirer and agreement to card scheme rules.
How it works
When a customer pays by card, the transaction is authorised through the card network and issuing bank. Once captured, the acquiring bank credits the net transaction amount (after deducting interchange, scheme fees, and acquiring margin) to the merchant account. This balance accumulates throughout the settlement period, then transfers to the merchant's nominated bank account on the agreed settlement schedule: T+1, T+2, or another agreed cycle.
A merchant account is not a standard current account. It does not hold funds indefinitely: it is a transit account specifically for payment processing. Merchants cannot freely withdraw from it or use it as an operating account. The acquiring bank controls the merchant account and can place holds, apply rolling reserves, or withhold settlement if fraud or chargeback risk warrants it.
Two models exist for merchant accounts. A direct merchant account gives the merchant their own unique merchant identification number (MID), their own acquiring agreement, and a direct relationship with the acquirer. An aggregated merchant account places the merchant as a sub-merchant under a payment facilitator's master MID, which handles the acquiring relationship. Direct accounts offer more control and typically better economics at scale; aggregated accounts are faster to obtain and require no direct acquirer relationship.
The merchant account application process involves the acquirer underwriting the merchant: assessing business type, financial history, chargeback risk by MCC, processing volumes, and the structure of the business. High-risk merchants face more intensive scrutiny, higher fees, and reserve requirements.
Why it matters
Without a merchant account (direct or through a facilitator), a business cannot accept card payments. It is the commercial and technical foundation of card acceptance. For growing businesses, the structure of their merchant account arrangement determines their processing costs, their settlement timing, and how much control they have over their payment stack.
Direct merchant accounts are the right structure for businesses processing significant card volume: they unlock interchange-plus pricing, direct scheme access, and the ability to negotiate bespoke acquiring terms. Aggregated models through payment facilitators suit lower-volume merchants where the simplicity and speed of onboarding outweigh the cost differential.
Merchant account management is an ongoing operational responsibility. Chargeback ratios above scheme thresholds (around 0.9% and 100 disputes for Visa, and 1.5% for Mastercard) trigger scheme monitoring programmes, fines, and ultimately the risk of merchant account termination. Terminated merchants may be placed on the MATCH (Member Alert to Control High-Risk Merchants) list, making it difficult to obtain a new merchant account from any acquirer.
With PXP
PXP holds direct acquiring licences in key markets and provides merchant accounts and acquiring through one platform. Talk to our team about how PXP can support your acquiring and merchant accounts.
Frequently asked questions
What is a merchant identification number (MID)?
A MID (Merchant Identification Number) is a unique identifier assigned to a merchant account by the acquiring bank. It appears on every transaction processed through that account and is used by the card networks, acquirers, and issuers to identify the merchant in authorisation, clearing, and dispute flows. Merchants with multiple locations, multiple acquiring relationships, or multiple business types may have multiple MIDs.
Can a merchant account be terminated?
Yes. Acquirers can terminate a merchant account for breach of the acquiring agreement, including excessive chargebacks, fraud, processing prohibited transaction types, or financial insolvency. Merchants terminated for fraud or excessive chargebacks may be added to the MATCH list (Mastercard) or equivalent scheme databases, making it significantly harder to obtain a new merchant account. MATCH listings last five years.
What is the difference between a merchant account and a payment facilitator account?
A direct merchant account is a dedicated acquiring relationship between the merchant and an acquiring bank, with the merchant's own MID. A payment facilitator account places the merchant as a sub-merchant under the facilitator's master MID. Sub-merchants do not have a direct acquirer relationship; the facilitator is responsible for onboarding, risk management, and settlement. Direct accounts offer more control and better long-term economics; facilitator accounts offer faster onboarding and simpler compliance.
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