Promo ROI Fundamentals
Master the Net Incremental Profit Bridge to separate value-creating from value-destroying promotions
Module Arc: You've Priced the Equilibrium and Architected the Portfolio. Now Promote Profitably.
- Pricing L1-L2 Elasticity & BE
- -2.62 meta-mean; -1.7/-1.8 CPG ceiling; 1% price leads to +8.7% OP
- Pricing L3-L4 Thresholds & WTP
- Zone of Indifference plus or minus 5%; reference-price anchoring; post-promo baseline erosion 15-25% from heavy promotion
- Pricing L5-L6 Growth Laws & XED
- Double Jeopardy, penetration > loyalty; 0.3 XED = 30% cannibalization
- Pricing L7-L9 Positioning, Parabola, Games
- Positioning / PRI; Lerner Index; Nash equilibrium, tit-for-tat, competitive simulation
- PPA L1-L2 Tiers & Pack Roles
- 15-25% tier-gap optimum; PRI 1.2-1.5x Premium / 0.9-1.1x Core / 0.7-0.9x Value; Entry / Routine / Upsize / Upscale roles
- PPA L3-L4 Incentive Curve & OBPPC
- RSP/kg index 120 / 100 / 70-85 / >120; OBPPC = Occasion x Brand x Pack x Price x Channel portfolio grid
- PPA L5 Pack-Price Matrix
- Pack role x price tier x acceptable mechanic crosswalk
- PPA L6-L7 GBB & CDT
- Good-Better-Best anchoring; Consumer Decision Tree governs portfolio logic
Pricing set the equilibrium price for a single pack. PPA architected the portfolio that sits around it. TPO tackles the temporary exceptions, the promotional events that eat 15 to 25 percent of revenue in a typical FMCG P&L and destroy value in more than half of cases. The Net Incremental Profit Bridge you are about to build is the tool that separates the events that work from the majority that do not, and the Pricing L2 leverage benchmark (1% price leads to +8.7% OP) sets the opportunity-cost hurdle every trade dollar must clear.
In an illustrative 1,640-event CPG portfolio, roughly one in five events destroy value. Volume looked great. Profit was negative.
Consider a worked-example FMCG promotional portfolio of 1,640 events. The retailer loved nearly all of them. Volume spiked. Sales teams hit their sell-in targets. But when the post-event analysis landed, around 21% of all promotions classified as "STOP". They destroyed more value than they created. The root cause was almost always the same: the volume looked incremental, but most of it was subsidized baseline, shoppers who would have bought at full price anyway. Large-sample promotional-effectiveness research points the same way: over half of all trade promotions result in little to no sales lift.
Illustrative distribution of 1,640 promotional events by ROI (worked example). The red bars on the left are promotions that lost money. Roughly one in five CPG promotions destroys value.
The Net Incremental Profit Bridge
Promotion ROI is not revenue divided by spend. It is the net incremental profit, gross incremental volume minus cannibalization minus subsidized base, multiplied by gross profit per unit, minus promo investment cost, all divided by the total trade investment. This waterfall reveals how apparent volume success becomes real profit destruction when subsidization and post-promo dips are properly accounted for.
Promo ROI = (Incremental Margin - Margin Dilution - Dip Loss) / (Margin Dilution + Dip Loss)In an illustrative 1,640-event portfolio scorecard (worked example), around 21% of events classify as STOP. They consume real trade spend while generating negative turnover. The Net Incremental Profit Bridge is the tool that separates value-creating from value-destroying promotions.
Master these trade promotion concepts before exploring the simulator
17 concepts- Purpose
- See how discount depth, volume uplift, and incrementality combine to determine whether a promotion creates real profit or just rents short-term volume.
- How to use
- Start with the default depth, then push incrementality up and down while holding everything else. Compare a shallow-with-high-uplift pattern to a deep-with-moderate-uplift pattern on the ROI waterfall.
- What to watch
- Net promo profit and the incrementality line. Incrementality below about 40 percent almost always destroys value regardless of discount depth. Post-promo dip silently reverses any headline gain.
Simulator
How deep the price cut goes during the promotion. Deeper discounts drive more volume but cost more margin. Promo price: $3.74
How much volume increases during the promotion vs. normal baseline sales. An uplift of 2.0x means double the normal volume.
Share of the UPLIFT volume (above baseline) that is genuinely new demand. The baseline volume itself is always treated as subsidised. The Performance Grid threshold uses share of TOTAL promo volume. At 40.0% of uplift x 2.0x uplift, that works out to 20.0% of total volume incremental.
How many weeks the promotion runs. Longer promotions risk training shoppers to only buy on deal.
The percentage volume drops below normal after the promotion ends, as shoppers who stocked up stay away.
How many weeks the post-promotion volume dip lasts before sales return to baseline.
20.0% of total promo volume (BEST threshold: 50% or more)
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Frozen Pizza Promo ROI: The Net Incremental Profit Bridge
Your brand manager ran a 20% temporary price reduction (TPR) on the flagship Margherita frozen pizza (RSP $4.99, COGS $2.10, normal weekly volume 10,000 units) for two weeks. Total promoted volume was 28,000 units. Trade spend for the event was $18,000 including retailer margin support and in-store activation. Post-event analysis shows a 12% dip below baseline for one week after the promotion ended. Build the Net Incremental Profit Bridge and assess whether this event belongs in the BEST, GOOD, REVIEW, or STOP quadrant.
According to the Net Incremental Profit Bridge, which formula correctly expresses the net incremental profit of a promotion?
ROI Tells You If. Source of Volume Tells You Why.
You now know how to build the Net Incremental Profit Bridge and classify an event on the Promo Performance Grid. You can trace the path from headline promoted volume through subsidized base, cannibalization, and the post-promo dip to arrive at net incremental profit. You also understand why the failure of more than half of promotions is built in, not a matter of poor execution. The +8.7% operating profit leverage of a 1% price move from Pricing Lesson 2 is the opportunity-cost hurdle every trade dollar must clear.
But the bridge answers only one question: did this event create or destroy value? It does not tell you whythe incremental volume appeared or where it came from. A +25% ROI event built on category expansion is strategically different from a +25% ROI event built on cannibalizing your own portfolio or pulling next quarter's demand forward through stockpiling. Two events with identical bridge outputs can have completely different strategic implications. One grows the pie, the other just reshuffles the crumbs.
Source of Volume decomposition answers the why. It splits every unit of incremental volume into one of six sources: Category Expansion (mutual growth with the retailer), Competitive Switching (brand-level share gain), Retailer Switching (channel-level share gain), Forward Buying (stockpiling, pulled from future periods), Internal Cannibalization (stolen from sibling SKUs), and Subsidized Base(loyal buyers who would have bought anyway). Each source has different implications for your P&L and the retailer's, and it determines whether the next event should be scaled, restructured, or stopped.
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