Essential payment terms to help UK businesses thrive

Understanding how payments work shouldn’t feel complicated. Yet for many small and medium sized businesses, the terminology alone can be a challenge. Terms like payment service provider, settlement, interchange fees, chargebacks and 3D secure appear regularly – but knowing what they mean can make a real difference to how confidently you run your business. 

This guide breaks down some of the key UK payment terminology to help you choose the right payment systems, manage costs and support your cash flow.

Read time: 5 mins  Added: 01/04/26

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How payments work for UK businesses

Understanding the steps behind each payment helps you see how money moves from your customer to your bank account. This section covers the key stages, so you know what’s happening at different points in the process.

Payment Service Provider (PSP)

A PSP is a company that enables your business to take payments in different ways, such as through card machines or online checkout systems. It provides the technical link that securely passes payment information between you and the organisation that completes the transaction.

Card acquirer

A card acquirer is the financial institution that enables your business to accept card payments, processes those transactions on the merchant’s behalf, and settles the funds into the merchant’s account.

Payment authorisation

Authorisation is the first step in a card transaction. The customer’s bank checks the card is valid and that enough funds or credit are available. Authorisation doesn’t mean the money has reached your bank account yet.

Settlement and payout

Settlement is when money moves between banks after a transaction has been processed. Your PSP then pays those funds into your business account – this is called a ‘payout’.

Some providers offer T+3 payouts – meaning funds are paid into your bank three business days after the payment or trade is made. Others may be quicker, sometimes with additional costs.

Understanding the steps behind each payment helps you see how money moves from your customer to your bank account. This section covers the key stages, so you know what’s happening at different points in the process.

Payment Service Provider (PSP)

A PSP is a company that enables your business to take payments in different ways, such as through card machines or online checkout systems. It provides the technical link that securely passes payment information between you and the organisation that completes the transaction.

Card acquirer

A card acquirer is the financial institution that enables your business to accept card payments, processes those transactions on the merchant’s behalf, and settles the funds into the merchant’s account.

Payment authorisation

Authorisation is the first step in a card transaction. The customer’s bank checks the card is valid and that enough funds or credit are available. Authorisation doesn’t mean the money has reached your bank account yet.

Settlement and payout

Settlement is when money moves between banks after a transaction has been processed. Your PSP then pays those funds into your business account – this is called a ‘payout’.

Some providers offer T+3 payouts – meaning funds are paid into your bank three business days after the payment or trade is made. Others may be quicker, sometimes with additional costs.

Common payment methods for UK-based merchants

UK businesses might typically use a mix of payment types, depending on their customers’ and trading needs. Here are the most common ones:

 

Card payments: Debit and credit card payments are widely used both in person and online. They’re convenient for customers and come with standard processing fees and the potential for chargebacks.

Contactless: Customers can tap a card or device for a fast, secure checkout. Contactless now represents the majority of in store card payments across the UK.

Bank transfer: A bank transfer moves money directly from one bank account to another without using a card network. It’s a straightforward way for customers to pay you directly through their bank.

Common payment methods for UK-based merchants

UK businesses might typically use a mix of payment types, depending on their customers’ and trading needs. Here are the most common ones:

Card payments: Debit and credit card payments are widely used both in person and online. They’re convenient for customers and come with standard processing fees and the potential for chargebacks.

Contactless: Customers can tap a card or device for a fast, secure checkout. Contactless now represents the majority of in store card payments across the UK.

Bank transfer: A bank transfer moves money directly from one bank account to another without using a card network. It’s a straightforward way for customers to pay you directly through their bank.

In store and online payment systems

The tools you use to accept payments can shape the customer experience and how efficiently your business operates.

Point of Sale (POS) systems

POS stands for Point of Sale. It’s where your customer completes a purchase and you take the payment – and the system you use to do that.

Card terminal

The physical device customers tap or insert their card into. Sometimes also called a card reader.

Payment gateway

A payment gateway securely connects your website to your payment processor. It’s essential for online card payments.

Hosted checkout

When taking online payments, some PSPs provide a secure, pre-built payment page. This reduces admin and helps with meeting security requirements.

Understanding card payment fees

Businesses pay a few different fees each time they accept a card payment. These fees cover the cost of moving money securely across the card networks. Knowing the basics helps you understand what you’re being charged. Here are some of the key fee types:

  • Transaction fees: Fees for accepting card payments such as Visa Debit or Mastercard Credit. This could be charged as a percentage of each sale processed or a fixed fee per transaction or as a combination of both.
  • Interchange fees: These are the fees that a card issuer (like a bank) charges the card acquirer every time someone pays with a card. They help cover things like payment processing and fraud protection. These fees are set by card schemes such as Visa and Mastercard and form part of the overall cost a business pays to accept card payments.
  • Scheme fees: These are fees that Visa and Mastercard charge for using their card networks. They’re billed to the card acquirer and cover things like authorising transactions, security checks and running the network. They ultimately form part of the cost a business pays each time it accepts a card payment. 
  • Additional fees: Some transactions such as online, over the phone, refunds, chargebacks, or international card payments may come with additional fees.

These fees vary depending on your provider, payment method and card type.

Refunds, chargebacks and fraud

Handling disputes and preventing fraud are important parts of running a secure payment operation. This section explains what to expect and how to help protect your business.

  • Refunds: Returning money to a customer after a completed purchase. Refunds typically take several working days to appear on a customer’s statement.
  • Chargebacks: A chargeback happens when a customer asks their bank to reverse a card payment. Chargebacks can be time-consuming and costly for SMEs.
  • Payment disputes: Your formal response to a chargeback, where you provide evidence to support your case – such as receipts or delivery confirmation.
  • Friendly fraud: When a customer disputes a legitimate payment – often because they don’t recognise the merchant name on their statement.
  • Fraud monitoring: Fraud monitoring tools help PSPs identify unusual or suspicious activity to protect your business.

Security and compliance for UK merchants

Payment security standards help keep your customers’ data safe and protect your business from risk. This section introduces the essential requirements businesses need to be aware of.

 

PCI DSS compliance: Payment Card Industry (PCI) and Data Security Standard (DSS) is a set of rules to help keep card information safe. Businesses that handle card payments must follow these requirements, to protect customer data.

Strong Customer Authentication (SCA): Extra security checks for online payments, such as one-time passcodes or app approvals.

3D Secure: 3D Secure is an extra identity step used during online card payments to make sure the shopper is the real cardholder. It works by asking the shopper to confirm their identity – for example, entering a code sent to their phone. It’s designed to help stop fraud and keep payments more secure.

Security and compliance for UK merchants

Payment security standards help keep your customers’ data safe and protect your business from risk. This section introduces the essential requirements businesses need to be aware of.

PCI DSS compliance: Payment Card Industry (PCI) and Data Security Standard (DSS) is a set of rules to help keep card information safe. Businesses that handle card payment must follow these requirements, to protect customer data.

Strong Customer Authentication (SCA): Extra security checks for online payments, such as one-time passcodes or app approvals.

3D Secure: 3D Secure is an extra identity step used during online card payments to make sure the shopper is the real cardholder. It works by asking the shopper to confirm their identity – for example, entering a code sent to their phone. It’s designed to help stop fraud and keep payments more secure.

Why understanding payment terminology matters

Getting to grips with payment terminology can help you:

  • Manage cash flow
  • Compare fees and avoid unexpected costs
  • Protect your business from disputes or refunds
  • Offer smoother, faster ways for customers to pay
  • Choose the right payment solutions as your business grows

A clear understanding of these terms makes it easier to stay on top of your payments and support your business with confidence.

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