The trade incentive effectiveness curve: when more spending stops working

The trade incentive effectiveness curve for West and East African FMCG distribution networks shows a consistent shape across markets: minimal response below 5% incremental spend (distributors do not change behaviour for marginal changes), strong linear response between 5% and 15% incremental spend (the sweet zone), a pronounced flattening between 15% and 25%, and near-zero marginal response above 25%. The inflection point — where additional spend produces the best return per dollar — sits consistently at 8–12% above baseline. Beyond 25% incremental spend, the constraint shifts from motivation to capacity: distributors who are already at maximum throughput cannot increase sell-out further regardless of incentive size.

The capacity constraint at the upper end of the curve is a specifically African finding. In markets with structural supply chain constraints — irregular stock availability, transport infrastructure limitations, refrigeration gaps for cold-chain products — distributor performance is ultimately bounded by operational factors that incentives cannot resolve. Companies that are pushing incentive spend into the 25%+ range are often competing against their own supply chain rather than against distributor motivation. Resolving the operational constraint produces more sell-out improvement than any amount of incremental incentive spend.

• Plot your current trade incentive spend as a percentage above your baseline and locate yourself on the effectiveness curve — if you are above 20%, you may be in diminishing returns territory
• Before increasing trade incentive budgets, investigate whether operational constraints are capping distributor performance — an undersupplied route cannot be incentivised to better performance
• The 8–12% incremental spend zone is where to concentrate budget for maximum efficiency — split a large incentive increase into smaller tranches at more frequent intervals rather than one large annual programme