Promotion ROI: The Formula & Why 50% of FMCG Promos Destroy Value

Trade Promotion ROI measures the incremental profit generated by a promotion relative to the trade spend invested. It answers the question every CFO eventually asks: "Are we actually making money on these promotions, or just buying volume?"

The answer, across the FMCG industry, is sobering. Large-sample promotional research consistently finds that roughly 40-57% of trade promotions fail to cover their fully-loaded cost, with around 59% failing to deliver positive ROI. Roughly 50% of promoted sales would have happened anyway -- they are subsidized volume. Even more striking, decomposition studies of household-panel data show that only about one-third of apparent promotional uplift represents genuinely new category demand -- the rest is brand-switching, stockpiling, and forward buying that does not grow the category. Total trade spend in FMCG typically runs 15-25% of gross revenue, making it the single largest controllable cost after cost of goods sold.

Why does this persist? Three reasons. First, the data to measure promotion profitability is complex and often siloed across TPM systems, syndicated data, and finance. Second, commercial teams are incentivized on volume and revenue, not profit. Third, retailers demand promotions as a condition of doing business, and manufacturers feel trapped in a cycle of spending they cannot prove works. Breaking this cycle starts with measuring ROI rigorously at the event level.

ROI = (Incremental Gross Profit - Promo Cost) / Promo Cost

Or equivalently:
ROI = Net Incremental Profit / Promo Investment

Where:
- Incremental Gross Profit = Incremental Volume x Gross Profit per unit
- Promo Cost = Total trade investment (on-invoice + off-invoice + promotional allowances)
- Incremental Volume = Promoted Volume - Baseline Volume (excluding cannibalization and subsidized base)

A positive ROI means the promotion generated more gross profit than it cost. Negative ROI = value destruction. Industry benchmark thresholds are:
- > +25% ROI: Strong performance (green)
- -25% to +25% ROI: Moderate / needs review (amber)
- < -35% ROI: Poor performance / stop (red)

Note: best-in-class promotions are 5x more efficient than average. The gap between worst and best within any company's portfolio is enormous.

A frozen pizza brand runs two promotions at the same retailer:

Promotion A: 25% off, no display, 2 weeks
- Promoted volume: 8,000 units. Baseline: 3,000/week (6,000 total)
- Gross incremental volume: 2,000 units
- After cannibalization (-300 units from own SKUs): Net incremental = 1,700 units
- Incremental GP: 1,700 x $2.40 = $4,080
- Promo cost: $6,500
- ROI = ($4,080 - $6,500) / $6,500 = -37% (red -- stop)

Promotion B: 15% off + gondola end display, 1.5 weeks
- Promoted volume: 7,200 units. Baseline: 4,500 total
- Gross incremental volume: 2,700 units
- After cannibalization (-150 units): Net incremental = 2,550 units
- Incremental GP: 2,550 x $2.80 = $7,140
- Promo cost: $5,200 (discount + display fee)
- ROI = ($7,140 - $5,200) / $5,200 = +37% (green -- replicate)

Same brand, same retailer. Promotion B spent less and earned more. The difference: display support and shallower discount. This pattern repeats across thousands of events in any TPO database.

Connecting to Pricing Lesson 2: a 1.0 ROI promotion just breaks even against doing nothing, so the +8.7% operating profit leverage from a 1% price move sets the opportunity-cost hurdle for every trade dollar. A trade dollar spent subsidizing loyal biscuit buyers at 20% off is a trade dollar that could have funded a 0.5% price hold earning +4.3% OP -- or absorbed a 1% COGS inflation wave with no consumer impact at all. Sub-1.0 ROI events lose to both alternatives.

Experienced RGM directors treat promotion ROI not as a reporting metric but as a decision filter. Every proposed promotion should have a projected ROI before it is approved, and every executed promotion should have an actual ROI in the post-event analysis.

A leading frozen foods company TPO Playbook embeds ROI into a governance process: promotions with projected ROI below the amber threshold (-25%) require escalation through an Out of Guideline (OOG) approval process. This prevents the calendar from accumulating value-destroying events that persist through inertia.

Critical nuance: negative ROI is not always wrong. Acceptable reasons include retailer relationship building, category growth obligation, manufacturing capacity utilization, new product trial, and competitive defense. The key is that these exceptions are conscious, documented, and time-limited -- not accidental outcomes of poor planning.

The biggest practical mistake: calculating ROI at the promoted SKU level only. True ROI must account for cannibalization of own-portfolio SKUs and the post-promotional dip. SKU-level ROI almost always overstates the real return.