Commission plans are written to motivate effort, and their larger effect is on where effort goes. A salesperson with limited hours chooses which deals to work, and the plan makes that choice for them.
Attention follows the payout, not the instruction
A representative can only run a certain number of active opportunities, so every plan is implicitly a ranking of which customers deserve time.
If new business pays materially more than expansion, existing accounts get less attention regardless of what the strategy document says.
Managers often read the resulting behaviour as a discipline problem when it is a rational response to the arithmetic they published.
Accelerators concentrate effort into windows
Plans that increase the commission rate above a threshold create a strong pull to reach that threshold and a weaker one to keep selling after it.
Representatives close to the line will pull deals forward, sometimes with concessions; those who cannot reach it may push deals into the next period instead.
The revenue does not disappear, but its timing is decided by individual compensation positions rather than by customer readiness, which makes forecasting harder than it needs to be.
Flat rates spread effort but blunt direction
A single rate across all products removes the timing distortion and gives no guidance about which products the company most wants sold.
Representatives then optimise for what closes easiest, which is usually the mature product with the established reference customers rather than the new one that needs early adopters.
Launching something new therefore requires a deliberate compensation decision, or the new product competes for attention on terms it cannot win.
Clawbacks change what gets sold to whom
Where commission is repaid if a customer cancels early, sellers become more careful about who they sell to, which is the intended effect.
It also makes them cautious about smaller or less established buyers whose risk of failure is higher but whose lifetime value might be substantial.
The provision is doing exactly what it was designed to do, and the company has to decide whether the caution it produces is the caution it wanted.
Plan changes are read as statements of intent
Sales teams examine a new plan for what it says about the company's view of their previous year, particularly where quotas rise or territories are redrawn.
Frequent changes teach representatives that any behaviour rewarded this year may be penalised next, which shortens their planning horizon.
Stability has value of its own, and companies that alter plans annually often find the compounding effect of trust harder to rebuild than any single incentive is worth.