What Is Mobile Money and How Does It Work?

Mobile money is an electronic wallet linked to a mobile phone number. Customers deposit cash with an agent or receive money into the wallet, then use the balance to pay merchants, send money to other people, buy airtime and pay bills — all without a bank account. The phone number itself acts as the account identifier.

Mobile money is one of the most important payment stories in Africa. M-Pesa, launched in Kenya, became the dominant way to move money in much of East Africa and proved that a phone-based wallet could leapfrog traditional banking. In South Africa, MTN MoMo and Vodacom's wallet offerings bring the same model to the local market, with a particular focus on unbanked and underbanked consumers.

How Does a Mobile Money Payment Work?

1. The customer loads value into their wallet — by depositing cash with an agent or retailer, or by receiving a transfer.
2. To pay a merchant, the customer authorises a payment from the wallet, typically via the provider's app, USSD menu or by approving a payment request.
3. The wallet provider moves the value from the customer's wallet to the merchant instantly.
4. The merchant either keeps the value in a business wallet or settles it out to a bank account.

Because USSD works on any phone, mobile money does not require a smartphone or data — one of the main reasons it reaches customers that card and app-based methods miss.

Why Is Mobile Money So Significant in Africa?

• It banks the unbanked. A wallet requires a SIM card and identity verification, not a bank relationship, branch visit or minimum balance.
• The agent network is the branch network. Cash goes in and out through large networks of agents and retail points.
• Person-to-person transfers drove adoption. Sending money home cheaply and instantly made wallets ubiquitous in markets like Kenya and Tanzania, and merchant payments followed.
• It runs on any handset. USSD support means feature phones participate fully.

In South Africa, a well-developed banking system and card infrastructure meant mobile money took longer to gain traction than in East Africa, and early attempts were discontinued. Current offerings such as MTN MoMo target the segment that traditional banking still serves poorly.

Mobile Money vs Other Wallets

For how card-based wallets like Apple Pay and Google Pay work, see What Are Digital Wallets?. Note also that paying to a phone number is not unique to mobile money — PayShap lets banked customers do the same between bank accounts using a ShapID.

How Can a Business Accept Mobile Money?

• Direct merchant integration with the wallet provider, via API, payment links or an in-store QR/USSD flow.
• Through a payments provider or gateway that includes mobile money alongside cards and other methods in one integration and one settlement.
• Payment requests, where the merchant sends a request the customer approves in their wallet.

Points to confirm with the provider:

• How and when wallet balances settle to your bank account.
• Transaction fees and any wallet or settlement account charges.
• How refunds are processed back to a wallet.
• Reporting and references for reconciliation.

When Does Mobile Money Make Sense for Your Business?

Mobile money is strongest where your customers are cash-first, informal-sector or without cards — and it pairs naturally with voucher and cash payment methods in an inclusion-focused checkout. If you trade into other African markets, wallet acceptance is often not optional but expected, since in several countries mobile money is the default way consumers pay.

Tips

• Verify the customer-facing flow on a basic handset, not just the smartphone app.
• Reconcile wallet settlements daily using the provider's transaction references.
• Keep payment instructions simple and language-light for first-time users.
• Reassess coverage periodically — wallet participation and features change quickly in this space.

Related Topics

• Other Payment Methods
• What Are Digital Wallets?
• What Is PayShap?
• How Do Voucher and Cash Payments Work Online?