6 Types of Online Payments and What Works Best in Asia

Online payments are how businesses collect money from customers over the internet — whether a shopper buys a product on your site, a subscriber renews a SaaS plan, or a traveler books a flight.

For merchants expanding globally, the challenge isn't just enabling payments. It's supporting the right payment methods in the right markets. A checkout that converts in the US can miss most customers in Indonesia, Thailand, or the Philippines — markets where local wallets dominate, not international cards.

This guide covers:

• How online payment infrastructure works — and where it creates friction for cross-border transactions

• Which payment methods actually convert in each major Southeast Asian market

• How to set up global payment acceptance, whether you're on Shopify or building a custom API integration

• How settlement cycles affect your cash flow — and what T+0 settlement means in practice

What Are Online Payments?

Online payments are digital transactions where a buyer transfers funds to a merchant over the internet — using a card, digital wallet, bank account, or other electronic method — without physical cash or in-person interaction.

The terms "e-payment" and "digital payment" are used interchangeably. What they share: the transaction is initiated online, and a payment service provider (PSP) handles the secure transmission, authorization, and settlement.

Online payments fall into two broad categories:

• One-time payments: A single transaction — a product purchase, a service fee, a booking.

• Recurring payments: Automatic charges on a set schedule — subscriptions, SaaS billing, membership fees.

Both run through the same underlying infrastructure. The difference is whether the merchant stores authorization to charge the customer again, which is handled via tokenized payment credentials.

How Do Online Payments Work?

An online payment moves through six steps — from checkout encryption to funds clearing in your account — in under three seconds, with a payment service provider coordinating authorization between your customer's bank and yours.

Every payment involves four key parties:

Here's what happens step by step:

1. Customer enters payment details at checkout — card number, wallet credentials, or bank login.

2. The PSP encrypts the data and transmits it securely to the acquiring bank.

3. The acquiring bank routes the request through the relevant card network (Visa, Mastercard, UnionPay) or payment rail.

4. The issuing bank approves or declines based on available funds, fraud checks, and any authentication requirements such as 3D Secure.

5. The result returns to the merchant: payment confirmed or declined.

6. Funds begin the settlement process — the timeline for when they actually reach your account varies by PSP and payment method (covered in the settlement section below).

Cross-border transactions add complexity at the acquirer and card network layer, routing through additional intermediaries and often requiring currency conversion before settlement. This is where PSP choice directly affects both speed and cost.

→ For a full breakdown of PSP selection: what a PSP does and how to choose one

Types of Online Payment Methods

Online payment methods fall into six categories — cards, digital wallets, bank transfers, BNPL, recurring payments, and cash-based methods — and which ones you offer directly determines your checkout conversion rate in each market.

The "Asia Availability" column matters more than most merchants realize. In Southeast Asia, digital wallets and fast-payment rails — not international cards — handle the majority of online transactions in several key markets. A checkout page that only supports Visa and Mastercard leaves a significant share of potential customers without a usable payment option.

→ Full list of 300+ supported payment methods : Any Device, One Experience

Online Payments in Asia: What US and European Merchants Need to Know

In Southeast Asia, local payment methods — not international credit cards — are the primary way consumers pay online, and in several key markets they account for the majority of digital transactions at checkout.

A checkout page that supports only global card networks is functionally invisible to a large share of potential customers across the region.

Here’s an overview of selected key markets supported by Antom, along with their major local payment methods.

Key Insight: To convert shoppers in Indonesia and the Philippines, digital wallets like DANA and GCash are non-negotiable — not optional extras. In Thailand, PromptPay is the dominant real-time payment rail. In Singapore, PayNow is the primary instant transfer rail for digital transactions. A single PSP integration that covers all of these is the practical choice for most merchants entering Southeast Asia.

These aren't niche alternatives. GCash serves more than 94 million users in the Philippines. Touch 'n Go eWallet has more than 17.8 million users in Malaysia. GrabPay operates across Malaysia, Singapore, and Indonesia.

How to integrate Asia payment methods

• SME (Shopify / WooCommerce): Antom's no-code plugins give you access to local payment methods across Asia Pacific in a few steps — no development required.

• Enterprise (API): A single Antom integration covers 300+ payment methods across 200+ markets, including all major local wallets listed above.

Your Asia Payment Readiness Checklist

Before launching checkout in any Southeast Asian market:

• Identify which local wallets dominate in your target country (Contact us for recommendations)

• Verify your PSP is licensed to operate in that jurisdiction

• Confirm support for local currency and language at checkout

• Enable 3D Secure (3DS) for card transactions in that market

• Configure fraud rules calibrated for the market's typical transaction profile

• Confirm settlement speed aligns with your cash flow requirements

A note on compliance

Each market has its own regulatory framework for payment services:

• Singapore: Cross-border payment services fall under the Payment Services Act, regulated by the Monetary Authority of Singapore (MAS).

• Indonesia: Payment service providers are regulated by Bank Indonesia.

• Thailand: Payment systems are overseen by the Bank of Thailand (BOT).

We recommend consulting a legal professional familiar with your target market’s payment regulations before launch, or contact us for support.

How to Accept Online Payments for Your Business

Accepting online payments requires three things: a payment service provider, an integration with your sales platform, and the right payment methods enabled for each market you're selling in.

The right integration path depends on your business size and technical resources.

SME path: No-code plugin (Shopify / WooCommerce)

If you're on Shopify or WooCommerce, you don't need a developer to get started.

1. Choose a PSP that covers your target markets and supports the local payment methods your customers use.

2. Install the plugin. Antom's Shopify and WooCommerce plugins activate in a few steps — no development work required.

3. Enable payment methods for your target regions.

4. Test checkout across devices and payment types.

5. Go live.

Enterprise path: API integration

For custom checkout flows, multi-country coverage, or deeper control over the payment experience, API integration offers maximum flexibility.

Antom offers three main integration paths:

• Hosted Checkout Page: Antom hosts the checkout UI — fastest to launch, minimal dev effort.

• Embedded Checkout Page: Checkout elements embed directly into your existing site — more control over UX.

• Direct API: Full control over card and APM payment flows — maximum flexibility for custom builds.

Key factors when choosing a PSP

• Payment method coverage: Does it support what your customers in each target market actually use?

• Security and compliance: PCI DSS certification is non-negotiable.

• Settlement speed: T+0 vs. T+3 has real cash flow implications — covered in the next section.

• Cross-border support: Selling internationally requires a PSP that handles multi-currency, local compliance, and regional payment rails.

→ Full PSP evaluation framework: what a PSP does and how to choose one

Are Online Payments Secure?

Yes — when processed through a PCI DSS-compliant payment service provider, online payments are protected by multiple security layers that operate in real time.

PCI DSS (Payment Card Industry Data Security Standard) is the baseline for the entire industry. Any PSP you work with must be PCI DSS certified — this standard governs how payment data is stored, transmitted, and processed across the full transaction chain.

The cross-border fraud challenge

Rule-based fraud engines calibrated for US or European transactions routinely misclassify legitimate digital wallet payments from Southeast Asian buyers as high-risk — creating false declines that cost merchants conversions without improving security. Effective fraud prevention for cross-border merchants in Asia requires AI models trained specifically on regional transaction behaviors. Antom Shield addresses this directly: 100% real-time decisioning, a 55% average improvement in fraud risk coverage, and models trained on 7 billion data points.

Chargebacks and dispute management

A chargeback occurs when a cardholder disputes a transaction with their issuing bank, triggering a reversal of the payment. For cross-border merchants, chargeback rates on international card transactions can be higher than on domestic payments — due to unfamiliar merchant names, currency conversion confusion, and a higher incidence of card-not-present fraud.

Managing chargebacks effectively requires clear transaction documentation, transparent refund policies, and a PSP with built-in dispute management tools. Reducing chargebacks before they occur — through real-time fraud screening and 3D Secure authentication — is significantly more effective than disputing them after the fact.

Online Payment Settlement: How Fast Do You Actually Get Paid?

Payment settlement is the process of transferring authorized funds from your customer's bank to your merchant account — a step that takes anywhere from real time to three business days, depending on your PSP and payment method.

Authorization and settlement are two separate events. When a customer's payment is approved at checkout, that's authorization — a signal that the funds are available. The actual transfer of money to your merchant account happens on a separate, slower timeline.

Why settlement speed matters for cross-border merchants

For high-volume merchants, the difference between T+0 and T+3 settlement can tie up meaningful working capital at any given time — funds that aren't available for inventory, marketing, or operations while they're clearing. This effect compounds when you're managing multi-currency payouts across multiple Asian markets simultaneously.

Local fast-payment rails in Asia are built for speed. PayNow (Singapore), PromptPay (Thailand), and QRIS (Indonesia) are designed for real-time or near-real-time settlement. International card transactions processed in the same markets typically follow the standard T+2–T+3 cycle — a meaningful difference for cash flow planning.

Frequently Asked Questions About Online Payments

How much does online payment processing cost?

Processing fees vary by payment method and provider. Credit and debit card transactions typically carry a fee in the range of 1.5–3% per transaction. Bank transfers and local fast-payment rails tend to have lower per-transaction costs. Most PSPs also charge platform or monthly fees. The full cost depends on your transaction volume, average order value, and the markets you operate in.

What is the best online payment method for small businesses?

The right choice depends on where your customers are. For US or European markets, cards and digital wallets (Apple Pay, Google Pay) cover most use cases. For businesses entering Asia, supporting local wallets — GrabPay, GCash, PromptPay, and others — is essential for checkout conversion. Antom's Shopify and WooCommerce plugins let small businesses enable these methods without any development work.

How long does online payment processing take?

Authorization is real time — typically a matter of seconds. Settlement takes longer: T+0 (real time) to T+3 (3 business days), depending on the PSP, payment method, and market. Local fast-payment rails like PayNow (Singapore) and PromptPay (Thailand) settle significantly faster than international card transactions.

What is a payment service provider (PSP) and do I need one?

A payment service provider handles the full payment process — authorization, fraud screening, compliance, and settlement — through a single integration. Unlike a standalone payment gateway (which only transmits data) or a payment processor (which only moves funds), a PSP combines all three functions. Virtually every online merchant needs one. → Payment Service Providers Explained

How do I add GrabPay, GCash, and other Asian wallets to my Shopify store?

The fastest path is a PSP's native Shopify plugin. Antom's Shopify integration enables local payment methods across Asia Pacific — including GrabPay, GCash, DANA, and PromptPay — with no coding required. Once installed, you can activate specific payment methods by market from your dashboard.

What is the best payment solution for US merchants selling in Asia?

The key requirement is a PSP with genuine local coverage in your target Asian markets — not just international card processing. Look for a provider that supports the dominant local wallets and fast-payment rails in each country, holds the necessary acquiring licenses, and offers regional fraud prevention. Antom is purpose-built for this use case, covering 300+ payment methods across 200+ markets with Asia-specific risk management built in.

Online payments aren't one-size-fits-all. The methods that convert in the US are often not the ones your customers in Thailand, Indonesia, or the Philippines will use. Getting this right — supporting the right payment methods in the right markets, with solid security, chargeback protection, and settlement timing that works for your cash flow — is what separates a checkout that converts from one that loses customers at the final step.

Ready to accept 300+ payment methods across Asia and beyond — including GrabPay, GCash, PromptPay, and more — with a single integration? → Explore Antom's online payment solutions