What a forward buy is
A forward buy is when a retailer or distributor buys far more product than it needs during a deal window, then sits on the extra and sells it later at full margin once the deal has ended. I spent years on the brand side watching this happen, and the tell was always the same: a quarter where shipments to KeHE spiked 40% on a four-week off-invoice allowance, and then went dead for the six weeks after. Nobody bought 40% more protein bars that month. The distributor just bought ahead of the discount.
The mechanic loving the deal isn't doing anything wrong, exactly. If you offer $3 a case off for four weeks, a buyer with warehouse space is going to load up. Why pay full price next month when you can pay deal price now and pocket the difference? That difference is the whole game. The brand funded a discount to move incremental volume to shoppers, and instead it funded a margin transfer to the buyer's balance sheet.
Forward buy vs. diversion
Forward buying and diversion are cousins, and people use the words loosely, so it's worth pinning them apart. A forward buy keeps the product in the buyer's own system: they bought deep on a deal and they'll sell it through their own stores later. Diversion is the next step. The buyer (often a distributor in a deal-heavy region) resells the deal-price product into a different market or channel that the allowance was never meant to reach. A West Coast distributor buys on a California promotion and trucks the pallets to an account in Arizona that's paying full freight.
Both distort the same thing: they decouple what the brand shipped from what a shopper actually bought. And the gap between consumption and shipment data is exactly where a forward buy hides.
A worked example
Here's a sparkling-water SKU through a regional distributor. Normal weekly demand is 1,000 cases. The brand runs a four-week off-invoice deal at $3.00 off a $30.00 case, expecting some lift. Watch the order pattern.
| Period | Weeks | Cases/wk | Total cases | Price/case | Brand revenue |
|---|---|---|---|---|---|
| Normal (pre-deal) | 4 | 1,000 | 4,000 | $30.00 | $120,000 |
| Deal window | 4 | 2,500 | 10,000 | $27.00 | $270,000 |
| Post-deal hangover | 6 | 350 | 2,100 | $30.00 | $63,000 |
| 14-week total | 16,100 | $453,000 |
Now compare it to fourteen weeks at the normal 1,000 cases a week and no deal: 14,000 cases at $30.00 is $420,000. So the brand pulled in 2,100 extra cases of real consumption for the trouble. But look at the deal window in isolation: of those 10,000 cases shipped at a discount, only a slice was incremental. The rest was the distributor pulling forward demand it was going to satisfy anyway, just now at $3.00 less per case.
The forward-buy cost is blunt. On roughly 6,000 of the deal-window cases that simply replaced future full-price orders (the post-deal hangover proves they existed), the brand gave away 6,000 x $3.00 = $18,000 for volume it would have sold at full price. That $18,000 is not a marketing investment. It's a check written to the buyer's margin, dressed up as a promotion.
Why it inflates shipment data and wrecks promo ROI
If you grade that promotion on shipments inside the deal window, it looks like a monster: 10,000 cases against a 4,000-case baseline, a 150% lift. Any analyst reporting on sell-in alone will call it a win and lobby to repeat it. The post-deal crater is in a different reporting period, so it quietly disappears from the promo recap.
This is the single most expensive mistake I saw in promo evaluation: measuring lift on the weeks that looked good and ignoring the weeks that paid for them. The honest read needs the full window, and it needs to net out forward buy. The allowance design matters here too, which is why off-invoice vs. billback is a live debate. An off-invoice deal is dead simple for a buyer to game by ordering deep; billback and scan-based structures pay on what actually sold through, which takes a lot of the forward-buy oxygen out of the room. They cost the brand more in admin and claims reconciliation, but they stop funding warehouses.
Where Scout fits
Forward buy lives in the seam between shipment data and consumption data, and the only way to see it is to put both next to each other across the full window, not just the deal weeks. Scout connects your SPINS or retailer consumption data to the sell-in side, so a promo recap spans the pre-deal baseline, the deal window, and the hangover after. It won't recover the $18,000 or renegotiate the allowance for you, that's still your job and your trade terms. It just makes the forward buy impossible to miss when you're deciding whether to run the deal again.
The short version
- A forward buy is a buyer over-ordering on a deal to resell later at full margin; diversion is reselling that deal product into a market the allowance never covered.
- It inflates shipments inside the deal window and leaves a crater after, so a promo graded on sell-in alone looks like a win it wasn't.
- Always evaluate the full pre-deal / deal / post-deal window, and prefer billback or scan-based structures over off-invoice if buyers are loading up.