Do you want your customers to pay for your products or services using Visa, Mastercard or other supported bank cards directly from your website or mobile application?
As more businesses move their operations online, accepting card payments can make it easier for customers to purchase products, pay invoices, book services and subscribe to digital platforms.
A customer may find your business through Google, social media or an advertisement, visit your website and decide to make a purchase. If your website only provides manual payment instructions, the customer may have to leave the checkout page, make a separate payment and then contact your business to confirm the transaction.
A properly designed card payment integration can make the payment process part of your website or application.
At WATT-IF LTD, we provide website development, e-commerce development, mobile application development, API development and payment integration services to help businesses create connected online payment systems.
Need Card Payments on Your Website?
WATT-IF can help integrate card payment functionality into your website, online store, mobile application, invoicing system or custom business software.
Request a Card Payment Integration Quote
Card payment integration is the process of connecting your website, mobile application or business software to a supported payment service so that customers can pay using eligible debit or credit cards.
Depending on the payment provider and merchant arrangement, customers may be able to use payment cards such as:
Visa
Mastercard
Other supported card networks
The payment process is incorporated into your digital platform rather than being handled completely outside your website.
For example, a customer shopping on your website can:
Select a product.
Add the product to the shopping cart.
Proceed to checkout.
Enter their billing and contact information.
Select card payment.
Enter the required card details through the applicable secure payment interface.
Complete any required authentication.
Receive a payment result.
Receive order confirmation if the payment is successfully confirmed.
The exact process varies depending on the payment gateway and the merchant configuration.
Customers have different payment preferences.
Some customers prefer:
M-Pesa
Airtel Money
Debit cards
Credit cards
Bank transfers
PayPal
Other digital payment methods
If your business operates online, providing appropriate payment options can make it easier for different customers to complete purchases.
Card payments can be particularly useful when you sell to customers who:
Shop online regularly
Live outside your immediate area
Purchase high-value products
Use international payment cards
Prefer not to use mobile money
Need to pay through a corporate card
Are purchasing services online
For an online business, the checkout experience is an important part of the customer journey.
A business can accept payments online without having a card payment gateway.
For example, you could provide:
Bank Name: ABC Bank
Account Number: XXXXX
Account Name: Your Company
The customer then leaves your website, logs into their banking application and makes a transfer.
This can work, but it introduces additional steps.
Card payment integration can provide a more direct online checkout experience.
Instead of telling customers:
"Make a bank transfer and send us proof of payment."
you can provide a structured payment process as part of the website.
This is especially useful for e-commerce businesses.
The technology behind card payments involves several systems working together.
Your website or application collects the necessary order information.
The payment integration communicates with the selected payment provider.
The customer enters their payment information through the applicable secure payment environment.
The payment provider processes the transaction.
The payment result is then communicated back to your application.
Your system can use the verified payment status to determine what happens next.
For example:
A customer places an order.
The system creates an order record.
The customer proceeds to payment.
The payment provider processes the transaction.
The transaction is confirmed or declined.
Your system updates the order based on the appropriate payment status.
The customer receives the relevant confirmation.
This process allows payment to become part of your wider business system.
A payment gateway is a service that facilitates communication between your online business and the payment processing infrastructure.
Your website does not simply send raw card information to any server it chooses.
Instead, the payment process is normally handled through an appropriately designed payment gateway or hosted payment environment.
The exact architecture depends on the payment provider.
This is important because card payments involve sensitive financial information and require appropriate security and compliance measures.
A common misconception is that a developer can simply create a form containing:
Card number
Expiry date
CVV
Cardholder name
and store those details in the business database.
That is not an appropriate approach for a normal business website.
Card payments require careful handling of sensitive payment information, security controls and applicable industry requirements.
A professional integration should use an appropriate payment provider and architecture rather than unnecessarily storing sensitive card information on your own server.
This is one of the reasons businesses should work with developers who understand payment integrations rather than simply asking someone to "add a card payment form."
E-commerce is one of the most common reasons businesses request card payment integration.
Imagine that you operate an online electronics store.
A customer finds a laptop for:
KSh 95,000
They add it to their cart and proceed to checkout.
Your checkout can offer several payment methods, such as:
M-Pesa
Airtel Money
Card Payment
The customer selects card payment and follows the applicable payment process.
Once the transaction is successfully confirmed, the website can update the order.
This can make the entire process faster and more professional.
Turn Your Website Into an Online Store
Do you already have products but customers cannot conveniently pay online?
WATT-IF can help you develop an e-commerce website with product management, shopping cart, checkout, payment integration, order management and other required functionality.
Build My E-Commerce Website
You don't need to sell physical products to benefit from card payment integration.
Service businesses can also accept online payments.
Examples include:
Web development companies
Marketing agencies
Consultants
Training companies
Law firms
Accounting firms
Design agencies
Travel companies
Event companies
Professional service providers
For example, suppose you offer a website design package costing:
KSh 80,000
Your website can present the service, explain what is included and allow the customer to proceed to an online payment process.
This can reduce the number of manual steps required to close the sale.
Businesses that operate booking platforms can incorporate card payments into the booking process.
Examples include:
Hotels
Apartments
Tour operators
Travel agencies
Event venues
Training providers
Consultants
Appointment-based businesses
A customer may:
Select a service.
Choose a date.
Enter their details.
Review the booking.
Pay online.
Receive booking confirmation.
The exact payment workflow should be designed according to the business rules.
For example, your business may require:
Full payment
Deposit
Booking fee
Partial payment
Payment before confirmation
WATT-IF can develop the system around the required workflow.
Subscription businesses require a slightly different approach from one-time purchases.
Examples include:
SaaS platforms
Online learning platforms
Membership websites
Digital services
Software platforms
Professional service subscriptions
A customer may choose:
Basic Plan – KSh 1,000/month
Professional Plan – KSh 3,000/month
Business Plan – KSh 8,000/month
The system then needs to manage more than the initial payment.
It may also need to manage:
Subscription status
Customer account
Billing dates
Payment status
Renewal
Failed payments
Account access
The availability of automated recurring billing depends on the payment provider and merchant arrangement.
WATT-IF can help design the subscription architecture around the available payment functionality.
Businesses that regularly issue invoices can benefit from online card payment options.
For example:
Invoice No.: WIF-00125
Customer: ABC Company
Service: Software Development
Amount: KSh 250,000
Instead of sending the invoice and separately asking the customer to make a bank transfer, your system can provide an appropriate online payment option.
The customer can access the invoice and proceed to payment.
After the payment has been appropriately confirmed, the invoice status can be updated.
This can make the invoicing process more efficient.
An ERP system can bring several business functions together.
Depending on the business, it can include:
Sales
Purchasing
Inventory
Customers
Accounting
Invoicing
Payments
Reporting
Employees
Payment integration can connect the payment process to these functions.
For example, a customer pays an invoice using a card.
The payment is confirmed.
The transaction is associated with the relevant invoice.
The invoice is updated.
The accounting workflow can then process the transaction according to the system's configuration.
This creates a more connected business environment.
A CRM system stores information about customers and sales activity.
A business may want its CRM to show:
Customer name
Products purchased
Services purchased
Orders
Invoices
Payment status
Customer history
Where technically appropriate, card payment information can become part of this broader customer record.
This can help sales and customer service teams understand customer activity.
If you operate an online store, payment and inventory often need to work together.
Suppose your website has:
Product A – 20 units
A customer purchases two units.
After the payment and order are appropriately confirmed, your system can update the inventory according to your configured workflow.
The result could be:
Available stock – 18 units
This becomes particularly important when you receive many online orders.
A properly designed e-commerce system can connect:
Products
Orders
Payments
Inventory
Customers
Invoices
Reports
This reduces the need to manage each process separately.
WATT-IF also develops mobile applications that can incorporate payment functionality where appropriate.
Examples include:
E-commerce apps
Delivery apps
Booking apps
Transport apps
School apps
Hospital apps
Event apps
Membership apps
Service platforms
SaaS applications
For example, a customer using a mobile application can select a service, proceed to checkout and choose a card payment method.
The application communicates with the backend.
The payment provider processes the transaction.
The application receives the relevant payment status.
The order or service request can then be updated according to the business rules.
Schools can also use online payment systems for:
School fees
Registration fees
Activity fees
Application fees
Boarding fees
Transport fees
Other approved charges
A school management system can be designed to show the student's balance and provide appropriate payment options.
Once a payment has been confirmed, the system can associate it with the relevant student account.
This can help reduce manual reconciliation.
Hospitals and medical facilities can incorporate online payments into appropriate billing workflows.
For example, a hospital management system may contain:
Patient information
Services
Billing
Invoices
Payments
Receipts
Reports
A patient or authorized payer can access an applicable bill and make a payment through the supported payment method.
The system can then update the relevant financial record after confirmation.
One of the major reasons businesses consider card payments is the ability to serve customers who may not use local mobile money services.
Suppose you operate a Kenyan business selling:
Software
Consulting
Digital services
Online courses
Design services
E-commerce products
You may have customers outside Kenya.
A payment solution that supports appropriate international card transactions can make it easier for eligible customers to pay.
However, international payment acceptance depends on the payment provider, merchant account, currencies, business category and other requirements.
WATT-IF can help you assess the technical side of your requirements.
Your business does not necessarily have to choose between card payments and mobile money.
A better approach for many online businesses can be to provide multiple payment options.
For example:
M-Pesa
Airtel Money
Visa / Mastercard
PayPal
Other supported payment methods
The exact options available depend on the payment providers and merchant configuration.
Providing appropriate options can help accommodate different customer preferences.
Give Your Customers More Payment Options
WATT-IF can help you build an online checkout that supports multiple payment methods where appropriate.
This can include mobile money, card payments and other supported payment providers.
Build My Multi-Payment Checkout
A payment API allows your website or application to communicate programmatically with a payment service.
For example, your application may need to:
Create a payment request
Send transaction information
Receive a payment response
Check transaction status
Process payment notifications
Update an order
The API provides the communication layer required for these operations.
This is why payment integration and API development are closely related.
WATT-IF provides API development and integration services for businesses that need to connect different software systems.
Not every payment attempt will succeed.
A transaction may fail because of:
Insufficient funds
Incorrect payment information
Bank restrictions
Authentication failure
Expired card
Network problems
Payment provider issues
Customer cancellation
A professional payment workflow should be designed to handle these situations.
For example, if a payment fails, your system should not automatically mark the order as paid.
Instead, it can show the customer an appropriate message and allow them to retry or select another payment method.
This is an important part of payment system development.
Once the appropriate payment confirmation has been received and verified, your system can perform the next business action.
Depending on your business, this could include:
Marking an order as paid
Generating a receipt
Updating an invoice
Updating inventory
Confirming a booking
Activating an account
Sending an email
Sending an SMS
Updating a CRM record
Updating a customer's payment history
The actual workflow is determined during system development.
At WATT-IF, we don't start by asking:
"Which payment button do you want?"
We start by understanding your business.
Our objective is to determine how payment should fit into your overall digital system.
We discuss:
What you sell
Who your customers are
How customers currently pay
Whether you have a website
Whether you have an application
Whether you have an e-commerce store
Whether you issue invoices
Whether you manage inventory
Whether you need subscriptions
Whether you need international payments
Whether you need multiple payment methods
This gives us a clearer understanding of the required solution.
If you already have a website, we can assess:
Website platform
Backend
Database
Checkout
Hosting
Existing payment functionality
Security
API capabilities
We then determine whether the existing system can support the required integration.
A good payment system begins with a good checkout experience.
We consider:
Customer information
Product information
Pricing
Taxes where applicable
Discounts
Delivery
Payment methods
Order confirmation
Customer notifications
The objective is to make checkout straightforward without unnecessary steps.
WATT-IF develops the technical integration between your system and the selected payment provider.
This may include:
API integration
Authentication
Payment initiation
Transaction references
Payment status handling
Callback processing
Error handling
Database integration
Transaction logging
This is where we add the business logic.
For example:
Customer
places an
Order
which creates an
Invoice
which requires a
Payment
which updates the
Order Status
and potentially
Inventory
and
Accounting Records
The exact workflow is customized to your business.
We test the payment workflow before launch.
Testing may include:
Successful transactions
Failed transactions
Cancelled transactions
Incorrect amounts
Duplicate payments
Network interruptions
Payment callbacks
Order updates
Invoice updates
Receipt generation
The goal is to identify problems before customers use the live system.
Once development and testing are complete, the payment integration can be deployed according to the payment provider's production requirements.
We can train your team on how to:
View payments
Check transaction statuses
Manage orders
Manage invoices
Generate reports
Handle failed transactions
Manage customers
Use the administration system
Your business may eventually want to add:
M-Pesa
Airtel Money
PayPal
Stripe
Flutterwave
Subscription payments
Mobile applications
ERP
CRM
Accounting
Inventory management
WATT-IF can continue developing your digital platform as your business grows.
There is no single price for card payment integration.
The cost depends on the project.
A business with an existing e-commerce website may only require payment integration.
Another business may need:
Website development
E-commerce
Product management
Customer accounts
Shopping cart
Card payments
M-Pesa
Airtel Money
Inventory
Invoicing
Accounting
CRM
Naturally, these projects require different levels of development.
Existing website:
Whether you already have a compatible website.
Technology:
The platform and programming technologies being used.
Payment provider:
The selected payment gateway and its integration requirements.
Checkout complexity:
A simple payment page is different from a complete e-commerce checkout.
Business automation:
Whether payments need to update invoices, inventory, orders or accounts.
Additional payment methods:
Whether you want cards alongside M-Pesa, Airtel Money and other methods.
Custom software:
Whether the payment system needs to connect to an ERP, CRM, POS or another custom application.
For this reason, WATT-IF recommends assessing the project before providing a final quotation.
Get a Card Payment Integration Quote
Tell us what you currently have and what you want your customers to be able to do.
WATT-IF can assess your requirements and recommend an appropriate solution.
Request a Custom Quote
The timeline depends on the complexity of the project.
A simple integration into an existing compatible website may take significantly less time than building an entire e-commerce platform.
The timeline may depend on:
Website technology
Existing checkout
Payment provider
Merchant setup
API requirements
Testing
Custom business logic
Additional integrations
If you need a more accurate timeline, WATT-IF can assess your existing website or requirements first.
WATT-IF can help you explore an online payment solution.
An appropriate online checkout can provide a more connected payment experience.
We can assess your requirements and help integrate an appropriate card payment provider.
A properly designed online payment workflow can reduce reliance on manual screenshot verification.
WATT-IF can develop an e-commerce checkout.
A multi-payment solution can be designed around the supported providers.
We can assess your international payment requirements and help determine suitable payment options.
WATT-IF can develop mobile applications with appropriate payment integration.
We can develop an invoicing and payment workflow.
WATT-IF can develop subscription workflows subject to the capabilities of the selected payment provider.
Security should be one of the most important considerations when implementing online card payments.
A professional implementation should consider:
HTTPS
Secure authentication
Payment provider integration
Access control
Server-side validation
Transaction verification
Secure database practices
Error handling
Transaction logging
Appropriate payment security requirements
Businesses should avoid unnecessarily storing sensitive card information on their own servers.
Instead, the payment architecture should be designed around the security capabilities of the selected payment provider.
The exact security and compliance requirements depend on the payment solution and how it is implemented.
A payment integration developer should understand more than APIs.
They should understand how payment fits into your business.
At WATT-IF, we provide:
Website development
E-commerce development
Mobile application development
API development
Payment integration
ERP development
CRM development
POS systems
Inventory systems
Accounting systems
Invoicing systems
Custom software development
This means we can build the payment functionality alongside the system that needs to use it.
For example, your business could have:
Website
↓
E-Commerce
↓
Checkout
↓
Card Payment
↓
Order Management
↓
Inventory
↓
Invoice
↓
Accounting
Instead of having separate systems that employees have to manage manually, the appropriate components can be designed to communicate with each other.
If you are launching a new business, you may not need a complex system on day one.
You might start with:
Business website
Online checkout
Card payments
M-Pesa
Airtel Money
As the business grows, you could add:
Customer accounts
CRM
Inventory
Accounting
ERP
Mobile application
Subscription functionality
WATT-IF can help you build a digital foundation that can grow with the business.
Many SMEs still manage sales and payments through several disconnected tools.
For example:
Website
Excel
M-Pesa
Bank transfers
Manual invoices
This can become difficult as the business grows.
A connected system can bring together:
Customers
Products
Orders
Payments
Invoices
Inventory
Reports
This can help reduce repetitive administrative work and give the business better visibility.
Yes, WATT-IF can help integrate an appropriate payment provider that supports the required card networks and merchant arrangement.
Yes.
Yes, depending on the WordPress setup and selected payment provider.
Yes, where the selected payment provider supports the required WooCommerce integration.
Yes.
Yes.
Yes, where the ERP supports the required integration.
A properly designed system can update invoices based on confirmed payment information.
Yes.
They can be incorporated into an order and inventory workflow according to the business rules.
Yes. Receipt functionality can be developed into the system.
Yes. A website can be designed with multiple supported payment methods.
Yes, where the applicable payment services and merchant arrangements support the required integration.
Yes. WATT-IF provides PayPal integration as part of its payment integration services.
Yes. Stripe integration can be considered where it is appropriate for the business and merchant setup.
Yes. WATT-IF can develop integrations with supported payment platforms according to the project's requirements.
This depends on the selected payment provider, merchant account, supported currencies and transaction rules.
Potentially, depending on the payment provider and merchant configuration.
The cost depends on the website, application, payment provider and functionality required.
The timeline depends on the complexity of the project.
An appropriate merchant/payment provider account is generally required for processing online card transactions.
No. WATT-IF provides the development and technical integration. The merchant relationship is established with the relevant payment provider.
Yes. Training can be included in the project depending on the solution.
Yes. Ongoing support and maintenance can be arranged.
Your customers should not have to struggle to pay you.
Whether you are selling products, services, subscriptions, bookings or digital products, an online payment system can make your business easier to transact with.
WATT-IF can help you develop a payment-enabled digital platform that brings together:
Website
E-commerce
Online checkout
Card payments
M-Pesa
Airtel Money
Invoicing
Orders
Inventory
Customers
Accounting
Reporting
The objective is not simply to add a payment option.
It is to build a payment process that fits into the way your business operates.
Ready to Accept Card Payments Online?
Whether you already have a website or are starting from scratch, WATT-IF can help you plan and develop your online payment solution.
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