Platform Commission and Split Calculation with Wave CI 2026: Formulas and Tiers

The verdict in three sentences

A miscalibrated commission kills either the platform (margin too thin) or the vendors (who leave), and once coded it is painful to change. Two models clash: the flat commission (simple but blind to volume) and degressive tiers (the rate drops as the vendor sells more, rewarding loyalty). In 2026 Cote d'Ivoire, with rates of 5 to 20% by category, Wave fees of 1% eating the margin and 18% VAT on the commission, you must model the tiers before writing a single line of code.

Flat commission versus degressive tiers

A flat commission is easy to explain but does not reward big vendors, who end up negotiating or leaving. Degressive tiers align the platform's and the vendor's interests.

2026 degressive tier grid (Cote d'Ivoire)

Here is a tier scale indexed on the vendor's monthly sales. Rates are a 2026 model; Wave fees are an order of magnitude.

The degressivity threshold kicks in at 1,000,000 FCFA of vendor sales: beyond it, the rate drops, pushing vendors to concentrate their volume on your platform rather than dilute it elsewhere.

Platform profitability simulation by tier

Always model net margin after fees and VAT, never gross commission. Example on a 15,000 FCFA ticket at the 10% tier.

The trap: displaying 10% commission and believing you collect 1,500 FCFA. After fees and VAT, only 1,080 FCFA remains, a real rate of 7.2%. That is the figure that must drive your business model.

Mini case study

Aminata launches a local-products marketplace in Abidjan. A flagship vendor does 4,000,000 FCFA in monthly sales: they fall into the 10% tier, generating 400,000 FCFA of gross commission. After Wave fees (~1%, i.e. 40,000 FCFA) and 18% VAT (72,000 FCFA), Aminata's net margin on this single vendor is 288,000 FCFA. Without the degressive tier she would have applied 20% — but the vendor, feeling over-taxed, would have diluted their volume elsewhere. Degressivity costs her a little rate but secures a partner who alone weighs 17% of her GMV.

FAQ

Flat commission or degressive tiers: which to choose? Flat to launch fast and stay readable; tiers as soon as you have high-volume vendors to retain. In 2026, degressivity beyond 1,000,000 FCFA of sales is a good compromise.

Why is my real margin lower than the displayed rate? Because Wave fees (~1%) and VAT (18% on commission) apply after. A displayed 10% rate gives a real net margin of about 7.2% on the ticket.

Does the 18% VAT apply to the commission or the ticket? The platform commission only. On 1,500 FCFA of commission that is 270 FCFA to remit — to provision from the moment you compute the split.

Where should you set the degressivity threshold? 1,000,000 FCFA in monthly sales is a common anchor in 2026: high enough to concern only serious vendors, low enough to stay a real incentive.

Is Wave CI settlement fast? Yes, generally T+0: the platform collects the ticket almost immediately, easing cash flow ahead of the weekly vendor payouts.

Let's talk about your project. We model your commission tiers and your Wave CI split engine, with net-margin simulation before coding. WhatsApp +221 77 596 93 33.