How to Integrate M-PESA into Your Website in Kenya

M-PESA is the backbone of digital payments in Kenya. With over 30 million active users, integrating M-PESA into your website is the single most effective way to increase online sales and reduce abandoned checkouts. In this guide we explain exactly how M-PESA website integration works, what it costs and how your business can start accepting mobile payments online.

What is M-PESA Daraja API?

Daraja is Safaricom's official API (Application Programming Interface) that allows developers to integrate M-PESA payments into websites, mobile apps and software systems. The name "Daraja" means "bridge" in Swahili — it is the bridge between your website and M-PESA's payment infrastructure.

Through Daraja, your website can:

  • Send payment requests directly to a customer's phone (STK Push)
  • Receive payments from customers (C2B — Customer to Business)
  • Send payments to customers or suppliers (B2C — Business to Customer)
  • Check transaction status and account balances
  • Process refunds automatically

Types of M-PESA Integration for Websites

STK Push (Lipa Na M-PESA Online)

This is the most common integration for e-commerce websites. When a customer clicks "Pay with M-PESA", a payment prompt is automatically sent to their phone. They simply enter their M-PESA PIN to complete the payment — no need to remember paybill numbers or account references.

STK Push is the best user experience for online payments in Kenya. It is seamless, fast and familiar to every M-PESA user.

Paybill Integration (C2B)

C2B integration allows your website to detect and verify payments made to your Paybill or Till number. When a customer sends money to your Paybill, your website automatically receives confirmation and updates the order status. This is useful for businesses that want customers to use existing Paybill numbers.

B2C Payments

Business to Customer payments allow your website to send money directly to customers' M-PESA accounts. This is used for refunds, disbursements, salary payments and loyalty rewards.

Requirements for M-PESA Integration

To integrate M-PESA into your website you need:

  • A Safaricom Paybill or Till Number — apply at any Safaricom shop or online at developer.safaricom.co.ke
  • A Daraja Developer Account — free to create at developer.safaricom.co.ke
  • A live website — Daraja requires a publicly accessible URL for callbacks
  • SSL Certificate (HTTPS) — mandatory for all Daraja integrations
  • A developer or agency with M-PESA Daraja experience

How Long Does M-PESA Integration Take?

A standard M-PESA STK Push integration takes 3–7 business days for an experienced developer. The process involves:

  • Day 1: Setting up Daraja developer account and sandbox testing
  • Day 2–3: Building the integration on your website
  • Day 4–5: Testing in sandbox environment with simulated transactions
  • Day 6: Applying for production access (go-live) with Safaricom
  • Day 7: Production testing and final launch

Safaricom's approval process typically takes 1–3 business days once you submit your go-live application.

How Much Does M-PESA Integration Cost in Kenya?

M-PESA integration costs depend on the complexity of your requirements:

  • Basic STK Push integration: KSh 15,000 – KSh 30,000
  • Full e-commerce with M-PESA checkout: KSh 50,000 – KSh 100,000
  • Custom payment system with B2C: KSh 80,000 – KSh 200,000

These are one-time development costs. Safaricom charges transaction fees on M-PESA payments, but there are no monthly API fees for using Daraja.

Common Mistakes When Integrating M-PESA

Many businesses in Kenya have had poor experiences with M-PESA integration because of these common mistakes:

  • Using unofficial libraries — always use Safaricom's official Daraja API, not third-party shortcuts
  • Skipping sandbox testing — always test thoroughly before going live
  • Not handling callback failures — your system must handle cases where the M-PESA callback fails to reach your server
  • Poor error messages — customers need clear feedback when a payment fails or succeeds
  • No reconciliation system — always build a system to reconcile M-PESA transactions with your orders

The Business Impact of M-PESA Integration

Businesses that add M-PESA to their websites consistently report:

  • 40–60% reduction in cart abandonment
  • 200–300% increase in completed online purchases
  • Significant increase in orders from customers outside Nairobi
  • Faster order processing with automatic payment confirmation

Get M-PESA Integrated into Your Website

Nexlent Solutions specialises in M-PESA Daraja API integration for websites and mobile apps across Kenya. We have successfully integrated M-PESA STK Push, C2B and B2C payments for businesses in retail, hospitality, logistics, healthcare and more. Contact us for a free consultation and we will advise you on the right integration for your business.