Do you want customers to buy from your website without calling you, sending WhatsApp messages or waiting for manual payment instructions?
A professional online checkout can turn your website from a simple information page into a platform that actually generates and processes sales.
Customers can browse your products or services, select what they want, enter their details, choose an available payment method, complete payment and receive confirmation.
At WATT-IF LTD, we design and develop online checkout solutions for businesses that want to accept payments through their websites, e-commerce stores, mobile applications and custom software.
We can integrate the checkout with payment methods and platforms appropriate for your business, including M-Pesa, Airtel Money, cards, Flutterwave, Stripe, PayPal and other supported payment providers.
Want Customers to Pay Directly From Your Website?
WATT-IF can build an online checkout connected to your website, payment gateway, orders, invoices, inventory and customer management system.
Request an Online Checkout Quote
An online checkout is the part of a website or application where a customer completes a purchase.
Think about a physical shop.
A customer:
Selects a product.
Takes it to the cashier.
Provides payment.
Receives a receipt.
Takes the product.
An online checkout performs a similar function digitally.
The customer:
Selects a product or service
↓
Reviews the order
↓
Enters details
↓
Chooses payment method
↓
Makes payment
↓
Receives confirmation
The checkout is therefore one of the most important parts of an e-commerce or online sales system.
You may have an excellent website.
You may have beautiful product images.
You may have competitive prices.
You may have strong SEO.
You may even have thousands of visitors.
But if customers cannot easily complete their purchases, your website may fail to convert that traffic into revenue.
Imagine a customer wants to buy a product worth:
KSh 15,000
They click:
Buy Now
Then your website tells them:
"Contact us on WhatsApp for payment."
The customer now has to:
Open WhatsApp
Send a message
Wait for a response
Receive payment instructions
Make payment
Send confirmation
Wait for verification
Some customers will complete the process.
Others will simply leave.
A well-designed checkout reduces unnecessary steps.
A good checkout should be:
Customers should understand what to do next.
Customers should not have to complete unnecessary forms.
The majority of online customers may access your website through smartphones.
Payment and customer information must be handled appropriately.
Customers should clearly understand what they are paying.
The system should correctly process payment statuses.
The checkout should communicate with your orders, invoices and other systems.
Kenyan businesses often need payment options that match local customer preferences.
Depending on your business and payment-provider configuration, you may want to offer:
M-Pesa
Airtel Money
Debit cards
Credit cards
International cards
Flutterwave
Stripe
PayPal
Other supported payment methods
The right combination depends on your customers.
For example, a Kenyan fashion store may prioritize:
M-Pesa + Card
while an international software company may prioritize:
Card + international payment provider
A business serving both Kenyan and international customers may need a combination.
WATT-IF can help you determine the appropriate payment architecture.
Not Sure Which Payment Methods Your Customers Need?
Tell WATT-IF where your customers are located, what you sell and how you currently collect payments.
We can help you plan an online checkout around your business requirements.
Discuss My Checkout Requirements
A typical checkout can follow this process:
Customer
↓
Product/Service
↓
Shopping Cart
↓
Checkout
↓
Customer Details
↓
Payment Method
↓
Payment Gateway
↓
Payment Verification
↓
Order Confirmation
↓
Invoice
↓
Fulfilment
The exact workflow depends on the type of business.
For a simple service business, you may not need a shopping cart.
For an e-commerce store with hundreds of products, a complete cart and order-management system may be required.
E-commerce is one of the most common applications of online checkout development.
Imagine you sell electronics.
Your website has:
Smartphone — KSh 45,000
Laptop — KSh 85,000
Tablet — KSh 35,000
A customer selects:
Laptop
They click:
Add to Cart
Then:
Checkout
The checkout displays:
Product: Laptop
Quantity: 1
Subtotal: KSh 85,000
Delivery: KSh 500
Total: KSh 85,500
The customer selects an appropriate payment option and completes the transaction.
The system then records the order.
You don't need to sell physical products to use online checkout.
A service business can also provide online purchasing.
For example:
KSh 80,000
Customer clicks:
Buy Now
↓
Provides contact details
↓
Pays deposit
↓
Receives confirmation
The system can then create a project or customer record.
This can be particularly useful for:
Consultants
Agencies
Training companies
Freelancers
Software developers
Marketing agencies
Professional service providers
Digital products are particularly suitable for online checkout.
Examples include:
E-books
Software
Online courses
Templates
Digital designs
Reports
Memberships
Downloadable files
A customer can complete the entire process online.
Product
↓
Checkout
↓
Payment
↓
Verification
↓
Download/Access
This can reduce manual order processing.
Suppose you offer:
Digital Marketing Course
KSh 20,000
The customer visits your course page.
They click:
Enroll Now
↓
Checkout
↓
Payment
↓
Account Created
↓
Course Access
Your platform can then connect the customer's payment status to their course access.
This means you don't have to manually activate every student.
Online checkout can also be integrated into booking platforms.
For example:
Hotel Room
KSh 12,000/night
Customer:
Selects dates
↓
Selects room
↓
Provides details
↓
Makes payment
↓
Receives booking confirmation
This can be used for:
Hotels
Tours
Events
Consultants
Appointments
Training
Car rentals
Equipment rentals
Subscription businesses need a slightly different checkout.
Instead of:
Buy Once
the customer sees:
Subscribe
For example:
KSh 1,000/month
KSh 3,000/month
KSh 8,000/month
The customer selects a plan.
↓
Creates an account.
↓
Completes payment.
↓
Subscription becomes active.
↓
Customer receives access.
This checkout can connect to a subscription-management system.
SaaS businesses can use checkout to allow customers to purchase software directly.
For example:
Project Management Software
Starter — $10/month
Professional — $30/month
Enterprise — Contact Us
A customer can select a plan.
After payment:
Account Created
↓
Subscription Activated
↓
Premium Features Enabled
This creates a direct connection between sales and software access.
Building Software That Customers Can Purchase Online?
WATT-IF can connect your website checkout to your SaaS platform, customer accounts, subscription system and payment gateway.
Build My SaaS Checkout
For many Kenyan businesses, M-Pesa is an important component of online checkout.
Depending on the payment provider and integration method, customers can initiate a mobile-money payment from the checkout.
For example:
Total: KSh 5,000
Customer selects:
M-Pesa
↓
Enters phone number
↓
Payment request
↓
Customer authorizes payment
↓
Payment verified
↓
Order confirmed
The exact process depends on the payment provider and implementation.
Businesses can also consider Airtel Money where supported by their chosen payment provider.
For example:
Select Payment Method
M-Pesa
Airtel Money
Card
Customers can then choose the method that is most convenient for them.
This can be particularly useful when your customer base uses multiple mobile networks.
Card payments can help businesses serve customers who prefer:
Visa
Mastercard
Other supported card networks
This can be particularly important when selling internationally.
For example:
A customer outside Kenya visits your website.
They may not have access to M-Pesa.
A card payment option can provide another way to complete the purchase where supported.
Flutterwave provides payment infrastructure that can be used to build online payment experiences.
Depending on the applicable configuration, businesses can integrate payment methods such as cards and mobile money.
WATT-IF can integrate Flutterwave into:
Websites
E-commerce stores
Mobile applications
Custom software
Invoicing systems
Subscription platforms
The exact payment methods available depend on the merchant account, market and provider configuration.
Stripe provides checkout and payment tools for supported businesses and markets.
It can be useful for:
SaaS
E-commerce
Digital products
Subscriptions
International businesses
However, Stripe availability varies by country and business type.
Your eligibility and available products should be confirmed with Stripe before development.
WATT-IF can then handle the technical integration.
PayPal can also be incorporated into online payment strategies where it is appropriate for your business and customers.
This can be particularly useful when serving customers who already prefer PayPal.
A business may therefore provide:
Card
M-Pesa
Airtel Money
PayPal
depending on the selected payment architecture.
Some businesses need more than one payment method.
For example:
M-Pesa
Airtel Money
Card
PayPal
The checkout can be designed to present relevant payment methods.
This can improve convenience for different customer groups.
However, adding more payment providers also increases technical complexity.
WATT-IF can help you determine which payment methods are actually necessary.
It may seem like offering ten payment methods is automatically better.
It isn't always.
Too many options can make the checkout confusing.
Instead, choose payment methods based on your customers.
For example:
If 90% of your customers use M-Pesa, make M-Pesa highly visible.
If you sell internationally, prioritize suitable international methods.
If your business sells subscriptions, make sure the selected provider supports the required recurring-payment functionality.
The objective is:
More convenient payments
not:
More payment buttons.
Your checkout must work properly on smartphones.
A customer should be able to:
View their order
Enter information
Select payment
Complete payment
Receive confirmation
without zooming in and out or struggling with tiny buttons.
A poorly designed mobile checkout can result in customers abandoning their purchases.
WATT-IF develops responsive websites designed to work across:
Smartphones
Tablets
Laptops
Desktop computers
One major problem in e-commerce is checkout abandonment.
This happens when customers start the purchase process but don't complete it.
Reasons may include:
Too many form fields
Complicated checkout
Unexpected costs
Poor mobile design
Slow website
Payment problems
Lack of preferred payment method
Trust concerns
Unclear instructions
A professional checkout should aim to remove unnecessary friction.
We can design your checkout around the customer journey.
For example:
Customer selects product.
Customer reviews order.
Customer provides essential information.
Customer selects payment.
Payment is processed.
Order is confirmed.
The number of steps depends on your business requirements.
The goal is to avoid unnecessary complexity.
Payment systems can encounter problems.
For example:
Payment Failed
The customer should not simply see:
"Error."
Instead, the system can provide an appropriate message.
For example:
"Your payment could not be completed. Please try again or select another payment method."
The customer should have a clear next step.
This is an important part of good checkout design.
One of the most important technical components of an online checkout is payment verification.
Your system should not automatically mark an order as paid simply because the customer reached a payment-success page.
The backend should use the appropriate confirmation mechanism from the payment provider.
For example:
Customer initiates payment
↓
Payment provider processes transaction
↓
System receives payment status
↓
Payment verified
↓
Order marked paid
↓
Customer notified
This protects your order-processing workflow.
Your checkout can be connected to an invoicing system.
For example:
Order
KSh 50,000
↓
Invoice Generated
↓
Payment
↓
Invoice Updated
↓
Receipt
This is useful for businesses that need formal financial records.
For physical products, checkout can be connected to inventory.
For example:
Stock
100 units
Customer buys:
5 units
After order processing:
Stock
95 units
The inventory system can therefore reflect sales made through your website.
A checkout can also create or update customer records.
For example:
Customer
John Kamau
Purchase
Website Package
Amount
KSh 80,000
Payment
Completed
The CRM can then store this customer information.
This gives your sales team better visibility.
Businesses with ERP systems can connect checkout data to:
Sales
Customers
Inventory
Invoices
Accounting
Reporting
This means an online purchase can become part of your wider business operations.
Payment information can be incorporated into financial workflows.
For example:
Sale
KSh 100,000
↓
Payment
KSh 100,000
↓
Invoice
Paid
↓
Accounting Record
Created/updated according to system configuration
This can reduce manual data entry.
Our approach focuses on the entire payment journey.
We first understand:
What you sell
Who your customers are
Where your customers are
How much you charge
Payment methods required
Whether you need subscriptions
Whether you need invoices
Whether you need inventory
Whether you need CRM
Whether you need ERP
If you already have a website, we assess:
Platform
Technology
Database
Hosting
Existing payment system
E-commerce functionality
Security
This determines what can be integrated.
We design the checkout structure.
For example:
Cart
↓
Customer Information
↓
Delivery
↓
Payment
↓
Confirmation
The exact layout depends on your business.
We integrate the relevant payment provider.
Possible options may include:
M-Pesa
Airtel Money
Flutterwave
Stripe
PayPal
Cards
Other supported providers
The backend manages:
Orders
Customers
Payments
Transactions
Invoices
Inventory
Subscription status
We configure the appropriate payment confirmation workflow.
We test:
Successful transactions
Failed payments
Cancelled payments
Duplicate transactions
Payment callbacks
Order creation
Invoice generation
Inventory updates
Once the system has been tested and the required payment-provider configuration is complete, the checkout can be deployed.
We train your team on how to:
View orders
Check payments
Manage customers
Review invoices
Handle payment issues
Manage the administration dashboard
WATT-IF can provide ongoing support and development as your business grows.
There is no single price.
The cost depends on what you need.
Existing website + payment gateway.
Website + products + cart + checkout + payments + orders.
E-commerce + payments + invoices + inventory + CRM + ERP.
Website + mobile app + subscription system + multiple payment gateways + API integrations.
These require very different amounts of development.
Several factors affect the project price.
An existing compatible platform may reduce development requirements.
A completely custom platform requires more development.
Large product catalogs require additional functionality.
Adding multiple gateways increases integration requirements.
Automated invoicing adds another component.
Inventory management requires additional database functionality.
Recurring billing requires additional business logic.
Customer management integration adds development requirements.
ERP integration can significantly increase project complexity.
Get a Custom Online Checkout Quote
Don't pay for features your business doesn't need.
Tell WATT-IF what you sell, how your customers currently pay and what you want your website to do.
Request a Custom Quote
The timeline depends on the scope.
A simple payment integration into an existing website can be much faster than developing a complete e-commerce platform.
A complex project may include:
Website development
Product management
Shopping cart
Checkout
Multiple payment gateways
Invoicing
Inventory
CRM
ERP
Mobile application
After assessing your project, WATT-IF can provide an appropriate development timeline.
WATT-IF isn't only a payment integration company.
We provide broader technology solutions.
Our services include:
Website development
E-commerce development
Mobile applications
Payment integrations
API development
ERP systems
CRM systems
Inventory systems
POS systems
Invoicing systems
Accounting systems
Custom software development
This means your checkout can be built as part of your wider digital infrastructure.
For example:
Website
↓
Products
↓
Checkout
↓
Payment
↓
Orders
↓
Invoices
↓
Inventory
↓
CRM
↓
Accounting
This is much more powerful than simply adding a payment button.
We can develop an online checkout.
We can integrate an appropriate M-Pesa payment solution.
We can integrate an appropriate card payment provider.
We can integrate Flutterwave where applicable.
We can integrate Stripe where it is available and appropriate for your business.
We can incorporate PayPal into your payment strategy where appropriate.
We can design a multi-payment checkout.
We can develop the required payment verification and order workflow.
We can connect checkout to an invoicing system.
We can connect checkout to inventory management.
We can build customer account functionality.
We can develop subscription and recurring-payment functionality.
We can develop the necessary API integration.
It is the part of a website or application where customers complete their purchases.
Yes.
Yes, provided the website's technology supports the required integration.
Yes.
Yes, subject to the selected payment provider and supported integration.
Yes, where supported by the selected payment provider.
Yes.
Yes.
Yes, subject to Stripe availability and eligibility.
Yes, where appropriate.
Yes. The appropriate architecture depends on your requirements.
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
It depends on the required features and integrations.
The timeline depends on the complexity of the project.
Yes.
Yes. Ongoing support can be arranged.
Your website shouldn't only tell customers who you are.
It should help customers take action.
Instead of:
Website
↓
Customer interested
↓
"Contact us for payment"
you can create:
Website
↓
Product/Service
↓
Checkout
↓
Payment
↓
Confirmation
↓
Order
↓
Fulfilment
That is the difference between an informational website and a website designed to support online business transactions.
Ready to Accept Payments Online?
Whether you already have a website or want WATT-IF to build your entire e-commerce platform, we can help you create a checkout designed around your customers and business.
Build My Online Checkout
Add M-Pesa Payments
Add Card Payments
Integrate Flutterwave
Integrate Stripe
Build My E-Commerce Website
Connect Payments to My ERP/CRM
Request a Custom Quote
Start Your Project With WATT-IF