Wave Digital Finance joined the BCEAO’s PI-SPI instant-payment system on 30 September 2026, the regulatory deadline set by the central bank, according to an updated list published by the Banque Centrale des États de l’Afrique de l’Ouest. The connection brings one of the region’s largest mobile money operators into an interoperability infrastructure it had previously held back from joining.
The BCEAO did not extend the deadline for banks, electronic-money institutions and payment institutions, despite earlier delays to the platform’s rollout. In a decision published on 25 June 2026, the central bank set 30 September as the final date for those institutions to complete their connection to PI-SPI and open services to the public. Only microfinance institutions received an extension, to 30 June 2027.
Wave’s absence had drawn attention since the platform launched in Dakar on 30 September 2025. The operator did not feature among the 45 institutions that opened PI-SPI services to the public at launch. That first group included banks, electronic-money institutions and microfinance institutions.
Participation reaches 175
The list published on 30 September brings the total number of participants authorised to offer PI-SPI services to the public to 175 across WAEMU. Senegal has the largest number, with 43 participants, followed by Côte d’Ivoire with 38 and Burkina Faso with 20. At launch, the platform had 45 participating institutions; by 24 June 2026, that figure had reached 80, with a further 74 institutions in live testing.
Wave’s integration expands the range of transactions its users can conduct. Until now, the company had built its service around an ecosystem that allowed users to transfer money, make payments and withdraw funds through its own network. Regional interoperability removes the restriction to a single operator’s network. Depending on the services Wave activates, users will be able to interact with accounts or wallets held by other institutions participating in PI-SPI.
The strategic calculation
Wave’s connection follows a period of regulatory pressure. The BCEAO issued a definitive mandate requiring full integration into PI-SPI, with an initial deadline of June 2026 before the extension to September. The platform was designed to dismantle closed-loop networks and enable instant transfers between banks, mobile wallets and fintechs across the eight-nation union.
For Wave, which captured over 38 per cent of the region’s mobile money transaction value in 2024, full integration means ceding part of the competitive advantage it built on a closed-loop network. The company’s growth has been underpinned by a flat transaction fee of about 1 per cent, significantly lower than those historically charged by telecom-led operators. Across WAEMU, mobile money transactions reached CFA160,415bn ($267bn) in 2024, equivalent to nearly 119 per cent of the bloc’s combined GDP.
The BCEAO’s decision not to extend the deadline reflects a pragmatic assessment. The earlier extension, announced in June 2026, was granted to allow the remaining 74 institutions in testing to complete their integration under optimal conditions. By September, with the deadline approaching, the central bank signalled that the transition to open competition would proceed as scheduled.
Orange Money, the market leader by transaction value share at 41.3 per cent in 2024, had already adapted its strategy following the BCEAO’s mandate for free person-to-person transfers. The operator introduced a 1 per cent fee on cash withdrawals, effectively shifting costs to recipients in a market where over 92 per cent of digital funds are ultimately cashed out.
The Business API bottleneck
While Wave’s entry into the participant layer marks a significant expansion, the Business API layer remains concentrated. The BCEAO’s approved Business API list, published on 16 September and updated on 17 September 2026, contains 24 providers across seven WAEMU countries. Senegal accounts for nine, Côte d’Ivoire for eight, and Niger for two. Benin, Burkina Faso, Guinea-Bissau, Mali and Togo each have one.
In all five of those smaller markets, the sole approved provider is Ecobank. The distinction matters. An institution may be authorised to offer PI-SPI services to the public without holding an approved Business API. An approved API allows companies to initiate and receive payments, submit bulk payment requests, automate payment operations, track transactions in real time and integrate payment data into accounting and treasury systems.
For a company in Cotonou, Ouagadougou, Bissau, Bamako or Lomé that wants to connect its software directly to PI-SPI, the practical choice is Ecobank. In Benin, the number of institutions authorised to open PI-SPI to the public increased from six in February 2026 to eleven by September, yet only one Business API has been approved.
Among the 104 participants on the July 2026 register, there was only one aggregator: TouchPoint Financial Services, operating in Côte d’Ivoire and Senegal. The September update does not alter that position.
Wave’s deepening ties with the state
Wave’s integration into PI-SPI comes as the company deepens its relationship with the Senegalese government. On 10 September, Senegal’s minister of telecommunications and digital economy, Samba Diouf, visited Wave’s offices in Dakar to discuss access to digital public services and the digitisation of transport, health and Treasury payments. No new deployment plan or timetable was announced after the meeting, according to Agenceecofin.
Wave holds about 80 per cent of Senegal’s mobile money market. As of 21 August 2026, Senegal’s outstanding electronic money stood at CFA571bn. Wave accounted for CFA459bn, against CFA106bn for Orange Money Sénégal. In April 2026, the Ministry of Health signed a partnership with Wave Digital Finance to digitise payments in public health facilities. In September 2026, the Caisse de sécurité sociale announced that some benefits would be paid directly into Wave accounts.
In transport, Wave partnered with Dakar Mobilité in 2024 for ticketing on Dakar’s bus rapid transit system. Mobile ticket purchases rose from about 10 per cent of transactions at launch to about 30 per cent within months, according to the operator. Wave has since expanded to the regional express train and the state bus company.
What the deadline means
The BCEAO’s decision to hold the line on 30 September reflects a strategic calculation. The platform had 80 connected participants by late June, with 74 more in testing. Extending again would have delayed the transition to a unified market. Holding the deadline forced the region’s largest operators to commit.
For Wave, the connection is an acknowledgment that interoperability is now a regulatory requirement, not a strategic option. For the BCEAO, it is a test of whether a system designed to break down closed-loop networks can avoid replicating concentration at a different layer.
The participant register is expanding. The Business API layer is not. The next updates to the central bank’s lists will show whether that gap narrows — or whether corporate access in five countries remains in the hands of a single bank.
The platform is live. The deadline has passed. The access map is not yet settled.