M-Pesa integration means connecting your website or business system straight to M-Pesa through Safaricom's Daraja API, so payments confirm themselves without anyone checking messages. A customer taps "Pay with M-Pesa", their phone gets a prompt, they enter their PIN, and your system marks the order paid on its own. Done properly, it replaces screenshot checks and manual till matching with a checkout that closes the sale by itself.
What does M-Pesa integration actually involve?
M-Pesa integration is your system talking to Safaricom's Daraja API over the internet. The entry point for most shops is STK Push, also called Lipa na M-Pesa Online: your server sends a payment request, the customer's phone receives the prompt, they enter their PIN, and Safaricom sends a confirmation callback to your server. That callback is the only proof of payment you should ever trust - not the prompt, not a screenshot the customer sends you. Around those API calls sits the real work: matching each payment to the right order, handling retries, and recording every transaction so your books reconcile at the end of the day.
How much does M-Pesa integration cost in Kenya?
For a proper build, expect to pay from about KES 65,000 for a business tool with M-Pesa payments built in, and from about KES 85,000 for a full online shop with M-Pesa checkout - typical rates for custom build packages. The Daraja API itself is free from Safaricom; what you pay for is the work around it. Ongoing costs are small: hosting for the system, typically a few dollars a month with a third party, and nothing per transaction beyond M-Pesa's normal charges. If a developer quotes a tiny amount for "adding M-Pesa", check what you actually get - often it is just your Paybill number displayed on a page, with no automatic confirmation.
Should you use a Till number or a Paybill?
Both work with STK Push through Daraja; what changes is the account type in the request and how the funds settle. Use a Till if customers mostly buy goods at a counter or online checkout. A Paybill suits businesses taking payments against invoices or accounts. If you already have one, keep it - customers who have paid you before already have it saved.
What steps take you from idea to live checkout?
- Register on Safaricom's Daraja developer portal and get production credentials approved for your business.
- Decide the flow: what the customer sees, what happens the moment payment confirms, and who gets notified.
- Build the STK Push request and a callback endpoint that receives Safaricom's confirmation.
- Treat the callback as the only proof of payment and record every transaction with its reference.
- Test with small real amounts before opening it to customers.
- Reconcile daily: compare your records against your M-Pesa statement so nothing slips.
How long does it take to go live?
The build itself is the fast part; Safaricom's production approval is the wait, so start the credentials process before anything else. In setups like an online shop with M-Pesa payments and WhatsApp ordering, the part that saves money is not simply the prompt on the customer's phone - it is the automatic record of every shilling that lands. If you already take M-Pesa by hand, start with how to stop verifying M-Pesa payments manually, and read the Daraja API practical business guide for the deeper technical detail.
Quick answer
M-Pesa integration connects your site or system to Safaricom's Daraja API so payments confirm automatically through STK Push and callbacks. A proper build in Kenya starts around KES 65,000 to 85,000, the API itself is free, and the slow step is Safaricom's production approval, not the code.
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