For any business that accepts payments online, choosing the right payment gateway is one of the most consequential technical decisions to make. A poorly chosen gateway — one that fails to inspire confidence, introduces friction into the checkout process, or does not support the payment methods customers prefer — can directly and negatively affect conversion rates and sales revenue. A well-chosen gateway, by contrast, makes the payment process as seamless and reassuring as possible.
The following overview covers what a payment gateway is, the key reasons it matters commercially, and a comparison of five of the most widely used options available to businesses in the UK market.
What Is a Payment Gateway
A payment gateway is the technology that enables a business to accept customer payments online. It is the mechanism through which credit and debit card details, and other payment information, are securely captured, encrypted, and transmitted for processing. Without a payment gateway, online transactions are not possible.
Why Choosing the Right Gateway Matters
Avoiding Lost Sales
When a payment gateway does not work reliably or does not present a professional and trustworthy appearance, customers are more likely to abandon their shopping carts before completing a purchase. Payment abandonment is a significant source of lost revenue for online businesses, and a well-functioning, professionally presented gateway is one of the most direct ways to reduce it.
Building Customer Confidence
Customers need to feel confident that they are transacting with a legitimate business that accepts widely used forms of payment. Accepting only obscure or unfamiliar payment methods can create doubt and deter purchases. Research consistently indicates that a significant proportion of customers will abandon a purchase if their preferred payment method is not available — making payment method breadth a meaningful commercial consideration.
Maximising Conversion Rates
A smooth, fast, and frictionless checkout experience directly supports conversion rates. Every additional step, delay, or point of confusion in the checkout process represents an opportunity for a customer to reconsider. The payment gateway should be as transparent and effortless as possible — ideally keeping the customer on the same site throughout rather than redirecting them to an external payment page.
Managing Costs
Payment gateway providers charge for their services through a variety of fee structures — including transaction fees, monthly account fees, setup fees, and chargeback fees. The total cost of a gateway depends on the volume and value of transactions processed, the payment methods accepted, and whether the business operates internationally. Evaluating the overall cost to the business — rather than focusing on any single headline figure — is essential before committing to a provider.
All pricing figures for the gateways below should be confirmed directly with each provider, as fees are subject to change and UK pricing may differ from the figures originally quoted in US dollars at the time this article was first published.
Five Payment Gateways Worth Considering
PayPal
PayPal is one of the most widely recognised payment platforms in the world, which is a significant advantage in itself. Many customers already have a PayPal account and feel comfortable using it, which can reduce friction at checkout. It handles international payments and supports multiple currencies, and it works across all major platforms. PayPal Express allows transactions to be completed without redirecting the customer to an external site, which can help protect conversion rates.
On the cost side, PayPal can be more expensive than some alternatives when monthly account fees are added to transaction fees. Businesses should review the full fee structure for their expected transaction volumes before selecting it.
Stripe
Stripe has grown rapidly to become one of the leading payment gateway providers, particularly valued for the ease with which it can be integrated directly into a website. Because Stripe keeps customers on the same site throughout the payment process, there is no redirect to an external page — a factor that can have a positive effect on conversion rates. Stripe accepts a wider range of card types than some competitors and supports more currencies than PayPal. It does not charge monthly account fees, which can make it more cost-effective for businesses with lower transaction volumes. Technical assistance may be required for initial integration.
Amazon Pay
Amazon Pay (formerly Amazon Payments) allows customers to use the payment and address information already stored in their Amazon account to complete purchases on other websites. The familiarity and trust associated with Amazon can reduce hesitation at checkout and has been shown to support improved conversion rates. Amazon is a trusted e-commerce brand, and sellers benefit from Amazon's fraud protection. Businesses considering Amazon Pay should review current transaction limits and fee structures directly with the provider, as these have been subject to change.
Authorize.net
Authorize.net has been operating in the payment gateway space since 1996, giving it a long track record and a depth of experience that many newer providers cannot match. It is owned by Visa, which provides an additional layer of institutional credibility. It offers a wide range of features — including various security settings, fraud protection services, and subscription handling — and integrates easily across a variety of platforms. Very good customer support is available. The trade-off is that it is more expensive than some alternatives, requires a merchant account, and moving away from the platform can involve some complexity in transferring data.
WorldPay
WorldPay has been processing payments since 1994 and is a large, established company with a substantial client base. Lower transaction rates are available compared to some competitors, and the scale of the organisation provides stability. However, WorldPay typically requires a contract, and early cancellation fees apply if a business needs to exit before the contract term ends. Customer service has been noted as an area of variable quality, and the fee structure includes multiple charges that should be reviewed carefully before committing.
Two Questions to Ask Before Choosing a Gateway
Will It Integrate Easily With the Existing Website or Platform
Integration time and cost vary significantly between providers and between website platforms. If a gateway requires significant technical resource to integrate, or does not work smoothly with an existing setup, the total cost of adoption is higher than the transaction fees alone suggest. Compatibility with the current platform — and the likely direction of the website's development — should be a key consideration.
Will It Support Business Growth
The payment gateway should be evaluated not just on its current fit but on whether it can scale with the business. A gateway that delivers a smooth, simple, and consistent checkout experience — one that keeps customers on the site, supports the payment methods they prefer, and processes transactions reliably — will support long-term commercial performance far more effectively than one chosen purely on the basis of initial cost. An unpleasant checkout experience, regardless of how competitive the fees are, will cost more in lost sales than it saves in transaction charges.
Making the Right Decision
Choosing a payment gateway requires research, comparison, and a clear understanding of the specific needs of the business. Reading independent reviews, speaking to other business owners about their experiences, and reviewing the full fee structures of each provider — rather than headline rates alone — produces a far more informed decision than selecting on brand recognition alone.
How Professional Academy Supports Your Journey
E-commerce, digital strategy, and commercial decision-making are all areas covered within the CIM marketing qualifications delivered by Professional Academy. Understanding the digital infrastructure that supports online business — including payment gateways, conversion optimisation, and customer experience — is an increasingly important part of modern marketing practice.
To explore the full range of CIM marketing qualifications, or to find out which programme is the right fit, visit the Qualifications Navigator or book a call with the team.
