Newton Byte provides payment gateway integration for UK websites, online stores and apps. We connect providers such as Stripe, PayPal, Worldpay, Square and SumUp to your checkout, so customers can pay quickly and securely by card, wallet or bank transfer.
We handle the technical work, security settings and testing, and support you after launch.
Trusted by startups, SMEs, and enterprise brands across the UK.
Your checkout is where sales are won or lost. A slow, confusing or untrusted payment step makes customers leave, while a smooth checkout with familiar payment options increases conversions. Good payment gateway integration makes paying feel effortless and keeps card data safe.
A payment gateway securely passes card or wallet details from your checkout to the payment provider, checks the payment and returns the result to your website. Done well, it is invisible to the customer. Done badly, it causes failed payments, duplicate charges and support headaches.
Strong Customer Authentication rules also apply to most UK card payments. The FCA’s guidance on Strong Customer Authentication explains the requirements, and we make sure your checkout handles 3D Secure checks smoothly.
Customers decide in seconds whether they trust your checkout. Familiar payment logos, clear pricing, a short form and fast loading all help. Asking customers to create an account, retype details or leave your site to pay all reduce conversions. Wallet payments such as Apple Pay and Google Pay remove most of the typing on mobile, which is where many abandoned baskets happen.
Failed payments are another hidden cost. Expired cards, bank checks and network errors all cause declines. Smart retries, clear error messages and alternative payment options recover many of these sales.
From a single payment button to complex subscription billing, our payment gateway integration covers everything your checkout needs.
We regularly work with Shopify, WooCommerce, Magento, OpenCart, custom PHP and JavaScript applications, booking systems, membership platforms and native mobile apps. If your platform supports payments, we can usually integrate the provider you want.
We add payment gateways to Shopify, WooCommerce, Magento, OpenCart and custom websites, keeping the checkout fast, mobile-friendly and on-brand.
We also tidy the checkout itself: fewer fields, clear delivery costs and trust signals that reassure customers before they pay.
We set up subscriptions, memberships, instalments and Direct Debit, with automatic retries for failed payments and clear emails to customers.
Customers can update their card details or cancel through a simple self-service portal, which cuts support emails.
For booking systems, portals and mobile apps, we integrate payment APIs directly, including webhooks for real-time updates. See our API development service.
For platforms such as booking tools and client portals, we can take deposits, split payments or hold funds until a service is delivered.
We use hosted fields and tokenisation so card data never touches your servers, reducing your PCI DSS scope. 3D Secure, fraud screening and secure webhooks are configured as standard.
We also configure fraud rules to suit your business, balancing protection against genuine customers being declined.
We connect payments to your accounting software and order system, so refunds, fees and payouts match up without manual work.
Payout and fee reports help you understand the true cost of each payment method, so you can make informed decisions.
We offer our full-fledged ecommerce solutions to major businesses operating in various industries. Therefore, be it is startups or enterprises, we know the needs of custom online stores. So, if you are into retail, finance, manufacturing, logistics, or any other business, we are here to help you out.
We build checkouts as part of complete websites and stores, so we understand how payment fits with orders, stock, emails and accounting.
Building a new store? Our custom ecommerce, Shopify and WooCommerce teams can include payment gateway integration from the start.
Fees, payout times, supported payment methods and contract terms vary between providers. We look at your average order value, sales volume and customer base, then recommend the options that suit you. You sign up with the provider directly, so you keep full control of your account.
Our process keeps your payments working throughout.
We look at your current checkout, sales channels and payment needs.
We compare providers and agree the payment methods and flows to build.
We connect the gateway in a test environment, including webhooks, refunds and notifications.
We test cards, wallets, 3D Secure, failures and refunds across devices.
We switch to live mode, monitor the first transactions closely and stay on hand for support.
Payment providers update their systems regularly. Our support plans keep your integration current, so changes on the provider side don’t break your checkout.
Answers to common questions about payment gateway integration. Can’t see yours? Get in touch.
It is the process of connecting a payment provider to your website or app so customers can pay securely at checkout. Good payment gateway integration is invisible to customers.
Stripe, PayPal, Worldpay, Square, SumUp, Opayo, GoCardless and many others, including custom APIs. We recommend the right one for your payment gateway integration.
Yes. Wallet payments are quick to add with most modern gateways and usually improve mobile conversions. They work alongside your existing payment gateway integration.
Yes. We can add Klarna, Clearpay and similar options where your provider and platform support them. This can be part of the same payment gateway integration project.
Yes. We use hosted fields and tokenisation so card details are handled by the provider, not your website. Security is built into every payment gateway integration we deliver.
Any business taking card payments has PCI DSS duties. Hosted solutions greatly reduce them, and we explain what remains. We explain your responsibilities in plain English.
Yes. We set up recurring billing, memberships and Direct Debit with automatic retries. Subscriptions are a common payment gateway integration request.
A standard checkout integration can take a few days. Custom or subscription projects take longer. We agree a timeline before work begins.
It depends on your platform and requirements. We give a fixed quote after a short review. Most payment gateway integration projects have a clear, fixed price.
No. We build and test in a sandbox first, then switch to live with minimal disruption. Your customers will not notice the change.
We can compare providers and pricing models to find a better fit for your volumes. Lower fees can quickly cover the cost of the work.
Yes. We integrate native payment SDKs and wallets into iOS and Android apps. The same backend can serve your website and app.
Yes. We connect payments to Xero, QuickBooks, Sage and other tools. This removes manual reconciliation.
Yes. We monitor payments, handle provider updates and fix issues quickly. Support plans are monthly with no long contract.
Yes. Alongside the UK, we support clients in the UAE, USA and Pakistan. We agree support hours that suit your location.
Yes. Book a free, no-obligation call through our Let’s Talk page. There is no obligation to go ahead.
Contact us through our contact page and we will review your checkout for free. Most payment gateway integration projects start within a week.
