Trade spend and the true ROI of promotions

The finance problem: much of this spend is booked as a deduction from revenue, so it quietly shrinks the top line before anyone measures whether it worked.

For a primer on how these deductions flow through a CPG income statement, the Consumer Goods Forum publishes accessible industry material worth bookmarking.

The four sources of promoted volume

When units spike during a deal, that lift comes from four places. Only one of them creates value.

1. Incremental volume (the good kind)

Genuinely new sales: a shopper who buys the product because of the promotion and would not have otherwise. This includes category expansion (people consuming more total ketchup) and brand switching (stealing a competitor's customer). This is the volume you actually want.

2. Cannibalized baseline

Baseline is what you would have sold at the regular price with no promotion. Loyal buyers who would have paid full price now pay the deal price. You sold the same bottle for less. Pure margin loss.

3. Pantry loading (forward buying)

A shopper stocks up on six bottles because it is cheap, then buys nothing for three months. You did not gain a sale. You moved it forward and gave a discount for the privilege. Next month's sales dip: the post-promotion trough.

4. Cross-store and channel shifting

The customer would have bought your brand anyway, just at a different store or a different week. No new demand, just reshuffled timing and location.

The brand manager sees total units. Finance has to see the mix.

Doing the incrementality math

Here is a simplified worked example. Numbers are illustrative.

Suppose the ketchup normally sells 1,000 units per week at a shelf price of $4.00, with a manufacturer net price to retailer of $2.40 and a cost of goods of $1.50. Baseline gross profit per unit: $0.90.

Now run a BOGO. Effective shelf price halves. Sales jump to 3,000 units in the week.

The naive view: "We sold 2,000 extra units!"

The finance view asks: how many of those 3,000 are truly incremental?

Assume post-event analysis shows:

• 1,000 units are baseline (would have sold anyway).
• 1,200 units are pantry loading (borrowed from future weeks).
• 800 units are genuinely incremental.

To fund the BOGO, the manufacturer's net price drops to roughly $1.20 per unit (funding half off). Gross profit per unit is now negative: $1.20 minus $1.50 equals negative $0.30.

Run the totals:

The event did not just fail to add profit. It destroyed $1,800 versus doing nothing, and it will suppress the next few weeks as the pantry empties.

The lesson: deep discounts on products with loyal, price-insensitive buyers are the classic value destroyers. You are paying to discount sales you already had.

The metric that matters: ROIROIReturn on Investment: the ratio of net profit to the cost of an investment. A 300% ROI means each dollar invested returns $3.Voir la définition complète → on incremental profit

The right measure is not sales lift. It is:

Promotion ROI = incremental gross profit generated / trade spend invested

If that ratio is below 1, the promotion is underwater. Because most of the lift in the example was baseline and pantry loading, incremental profit was negative, so ROIROIReturn on Investment: the ratio of net profit to the cost of an investment. A 300% ROI means each dollar invested returns $3.Voir la définition complète → was negative.

🎬 [VIDEO: "Trade Promotion Management Explained" — youtube.com — a concise walkthrough of how CPG firms plan, fund, and measure trade promotions]

Why 60 percent still destroy value

If the math is this clear, why does it keep happening?

Misaligned incentives. Sales teams are often paid on volume, not profit. A BOGO that triples units looks like a win on their scorecard even if finance bleeds.

Baseline blindness. Without a clean counterfactual (an estimate of what would have sold anyway), lift looks impressive. Many firms historically measured "versus last period," which bakes in the illusion.

Retailer pressure. Big retailers demand promotional support as a condition of shelf space and feature. Saying no can mean lost distribution, so brands fund deals they know are marginal.

Deduction leakage. Money committed to a display or discount is not always spent as agreed, and unauthorized deductions (retailers short-paying invoices for claimed promotional support) are notoriously hard to reconcile. Cash leaks before ROIROIReturn on Investment: the ratio of net profit to the cost of an investment. A 300% ROI means each dollar invested returns $3.Voir la définition complète → is even calculated.

The averaging trap. A portfolio of promotions can look fine on average while a handful of deep, frequent discounts quietly hemorrhage margin. The good promotions subsidize the bad ones, hiding them.

What good looks like

The best FMCG finance teams do not ban promotions. They redesign them. A few concrete moves:

Promote elastic products, protect inelastic ones. A staple that loyal shoppers buy regardless of price (inelastic) gains little from discounting: you just give away margin. A discretionary or impulse item (elastic) where price genuinely swings the decision is a better promotion candidate.

Shallow and frequent beats deep and rare, sometimes. A modest discount that drives real trial can beat a 50 percent BOGO that mostly loads pantries. The right depth depends on the elasticity, so it must be measured, not assumed.

Model the trough. Always net out the post-promotion dip. A promotion is only incremental if the total, including the weeks after, exceeds baseline.

Shift from price to non-price mechanics. Feature and display without a deep price cut can lift volume by improving visibility, at far lower margin cost than halving the price.

Use clean baselines. Modern trade promotion optimization (TPO) tools use statistical models and, increasingly, machine learning to estimate the counterfactual from historical sales, seasonality, and competitor activity. The goal is to isolate true incrementality before committing spend.

Reconcile deductions rigorously. Match every dollar of committed trade spend to what the retailer actually delivered and claimed. Recovered leakage often improves promotion ROIROIReturn on Investment: the ratio of net profit to the cost of an investment. A 300% ROI means each dollar invested returns $3.Voir la définition complète → more than any clever redesign.

Bringing it back to the P&L

Trade spend sits at the intersection of sales, marketing, and finance, which is exactly why it goes unmanaged. Sales owns the relationship. Marketing owns the brand. But only finance is positioned to ask the uncomfortable question: did this deal create incremental profit, or did we pay our own loyal customers to buy what they were going to buy anyway?

For a CPG business, shifting even a few points of trade spend from value-destroying to value-creating promotions can move the entire operating margin. In a low-growth, high-competition sector, that is often where the real money is found: not in selling more, but in stopping the quiet leaks.

Key Takeaways

• Sales lift is not profit. Promoted volume comes from four sources: incremental sales, cannibalized baseline, pantry loading, and channel shifting. Only genuine incrementality creates value.
• Measure ROI on incremental gross profit, not units. If incremental profit divided by trade spend is below 1, the promotion is underwater.
• Deep discounts on loyal, price-insensitive buyers are the classic value destroyer. You pay to discount sales you already had, then absorb a post-promotion trough.
• The 60 percent failure rate is structural, driven by volume-based incentives, weak baselines, retailer pressure, and deduction leakage, not just bad luck.
• Fixing trade spend is a margin lever, not a cost cut. Redesigning promotions around real elasticity and clean counterfactuals can move operating margin more than growing volume.