A 10% discount is not a 10% problem.
A discount doesn't shave the price. It shaves the profit zone — and on a thin margin, that bite is brutal.
Drag the sliders. Watch how much extra volume a "small" discount quietly demands just to keep gross profit flat.
Ask a different question before you sign off a discount.
A customer asks for a better price. The rep wants to close. The manager sees a chance to grow revenue. Five or ten percent feels like a rounding error. But on profit, a discount is never a rounding error — it comes straight out of unit gross profit, and the thinner the margin, the harder it lands.
Two situations every commercial leader recognises.
This is sharpest in companies that grow revenue but feel margin slipping away — the ones working with 10–35% gross margins, frequent negotiations, and sales KPIs tied to turnover.
Thin margin, automatic discounts
A distributor runs on a ~12% gross margin. Reps are measured on turnover, so 3–5% discounts go out almost reflexively to close deals. A year later revenue is up 15% — and gross profit in euros is roughly flat. Each small discount ate a large slice of an already-thin margin, and the promised extra volume often never arrived. The company grew volume exactly where profit didn't.
"A bigger discount for a bigger order"
A manufacturer holds a 20% margin. A large buyer asks for 10% off "for volume." It sounds reasonable — until the model shows that discount needs double the volume to break even on gross profit. The real question stops being "should we discount?" and becomes "is the buyer contractually committed to that double volume — and will we verify it actually shipped?"
In both cases the discount isn't the villain. The villain is a discount with no link to volume, cost, and gross profit.
How much more you must sell.
The model answers one precise question: how much more volume keeps gross profit in euros at the level it was before the discount. (This is not the formula for keeping the same margin percentage — it's for keeping the same euros of profit.)
Same 5% discount. Completely different cost. Why? Because the discount is subtracted from the profit zone, not the price. At a 10% margin, 5% off cuts unit profit in half; at 15%, the same 5% only cuts it by a third. The thinner the starting margin, the more aggressively a discount eats profit — and the more volume you need to claw it back.
When volume can't save you.
The dead zone: discount ≥ margin
When the discount equals or exceeds the gross margin, unit gross profit becomes zero or negative — and no amount of extra volume helps.
10% margin · 15% discount → price €85 · cost €90 · profit −€5 — every extra unit deepens the loss.
Here the right question is no longer "how much more do we sell?" It's "why are we selling below the profit line at all?"
The full interactive model.
Move across every margin-and-discount combination and watch the required volume change in real time. The empty region in the chart is the dead zone above.
This is a static model. Sometimes you need less.
The chart assumes unit cost stays fixed. It deliberately does not price in:
In reality, a deeper discount sometimes pulls in larger orders that dilute unit cost — and then you need less extra volume than the static model says. Take 20% margin with a 10% discount:
But if scale drops cost €80 → €75: profit €20 → €15 → ×1.33 → only +33% volume
Instead of doubling volume, ~33% more is enough — but only when the cost reduction is contracted, not hoped for. That's why the static model isn't the final answer. It's the first check: it shows when a discount is commercially dangerous and deserves a closer look.
Six questions that change the answer.
The value of this model isn't that it forbids discounts. It's that it replaces "what discount can we give?" with questions that actually protect profit:
- How much unit gross profit do we give up?
- How much extra volume will we really get — committed, not hoped for?
- Will the larger order genuinely reduce unit cost?
- Is the customer committed to the volume, contract, or wider basket?
- Do our sales KPIs measure profit, or only turnover?
- After the deal, do we check whether the promised volume actually shipped?
A discount isn't a problem when it's managed. It becomes one when it's a reflex answer to a customer's request instead of a decision backed by numbers.
A discount is a profit decision — so price it like one.
Growing companies rarely lose profit to bad selling. They lose it to weakly governed pricing and discount decisions. If you want to check whether your pricing grows profit and not just turnover, let's talk.