Custom payment integration
for SG businesses.
PayNow, GrabPay, and beyond.

Singapore has one of the most advanced digital payment ecosystems in the world. Consumers here expect to pay with PayNow, GrabPay, or PayLah! the same way they expect to pay by card. The good news is that platforms like HitPay and Stripe SG now make it straightforward to accept local and global payment methods through a single integration. For many businesses, that is all you need.

But when your payment flow involves specific business logic, split payments, deposit-then-balance collection, automated invoice reconciliation, or a checkout experience tailored to your exact workflow, off-the-shelf solutions start to show their limits. That is where custom payment integration comes in.

When standard solutions
are not enough.

Platforms like HitPay and Stripe SG handle the basics well. They bundle PayNow, GrabPay, cards, and more into a single dashboard with reasonable transaction fees. If your needs are straightforward, collecting payment for products or services, these are solid, proven options and we would recommend starting there.

The limitations show up when your business logic is more specific.

Split payments. If your business needs to split payments between deposits and final balances, or between multiple vendors, standard platforms do not support this natively. You end up managing the difference manually.

Custom checkout flows. You want a checkout experience that matches your exact workflow, not a generic hosted payment page. Maybe it is a multi-step booking with payment at different stages, or a pricing calculator that feeds directly into the payment request.

Automated reconciliation. You need payments to automatically update your internal systems, trigger fulfilment workflows, or reconcile against invoices without manual matching. Standard plugins process the payment but leave everything after that to you.

The Singapore payment
landscape.

PayNow (QR and API). Singapore's real-time bank transfer system. Customers scan a QR code or authorise via their banking app. For websites, the PayNow API allows you to generate unique QR codes per transaction and receive instant confirmation webhooks when payment clears.

GrabPay. Widely used across Singapore, especially for everyday purchases. Integration requires OAuth authentication and a specific checkout flow. When done well, it feels seamless. When done poorly, customers drop off at the redirect.

Stripe SG. Stripe's Singapore entity supports PayNow, GrabPay, and cards in a unified API. It is often the backbone of custom integrations because it handles compliance and settlement in SGD.

HitPay. A Singapore-based payment platform that bundles PayNow, GrabPay, cards, and other local methods in a single integration. Particularly popular with SMEs for its straightforward setup and local support. For businesses with standard checkout needs, HitPay is often the fastest path to accepting local payments.

DBS PayLah! and NETS. PayLah! reaches over 1.6 million users in Singapore. NETS remains essential for certain demographics and transaction types. Both have APIs available for website integration, though documentation and support vary.

What custom integration
actually looks like.

A custom payment integration is not a plugin installation. It is code written specifically for your business logic, connecting your website to payment APIs through secure server-side endpoints.

The flow typically involves: your customer selects a payment method, your server generates a payment intent or QR code via the provider's API, the customer completes payment in their app, a webhook confirms the transaction to your server, and your site updates the order status and sends a receipt.

Every step is handled programmatically. No manual verification. No checking bank statements. No delays.

Real use cases in
Singapore.

F&B pre-orders. A restaurant takes lunch orders online. Customers pay via PayNow QR at checkout. The kitchen receives confirmed, paid orders only. No chasing payments at pickup.

Clinic deposits. A dental clinic collects a $50 deposit when patients book online. The integration generates a PayNow request, confirms payment, and locks the appointment slot automatically.

Membership subscriptions. A fitness studio bills members monthly via Stripe SG with PayNow as the payment method. Failed payments trigger automated retry logic and member notifications.

B2B invoicing. A services firm sends invoices with a "Pay Now" button. The client clicks, selects PayNow or bank transfer, and payment reconciles against the invoice in real time.

Security and PDPA
compliance.

Payment integration touches sensitive data. Card numbers, personal identifiers, transaction history. In Singapore, the Personal Data Protection Act (PDPA) governs how this data is collected, stored, and processed.

What this means in practice: payment data should never touch your server in raw form. Use tokenisation through your payment provider. Store only what you need for receipts and reconciliation. Encrypt data at rest and in transit. Implement proper access controls so only authorised systems can query transaction records.

Custom integrations give you full control over these boundaries. Unlike plugins where you hope the developer followed best practices, a bespoke solution lets you define exactly what data flows where, and audit every step.

We build this into your
existing site.

Sometimes the right answer is connecting a provider like HitPay or Stripe SG to your website using their API. You get local payment methods, a proven platform, and a checkout flow that sits neatly within your existing site rather than redirecting customers elsewhere. We handle the API integration, webhook setup, and testing so it works reliably from day one.

Sometimes the answer is a fully custom integration built around specific business logic that no off-the-shelf provider supports out of the box. We build that directly into your current site, whether it runs on WordPress, another CMS, or a fully custom stack.

Either way, the process is the same. We assess your current setup, identify the right approach for your use case, build the integration with proper webhook handling and error flows, test thoroughly in sandbox environments, then deploy. Ongoing, we monitor for API changes from providers and handle updates before they break anything.

The goal is not complexity for its own sake. It is making sure your payment flow works exactly the way your business needs it to.