A DTC brand sees discount emails drive instant sales while its brand videos show no measurable short-term return, so it shifts nearly all budget to the emails. What does the 60/40 rule predict?

Sales hold up briefly, then stall as future demand dries up

Sustained growth, since every dollar is now provably efficient

Sales hold up briefly, then stall as future demand dries up

⚖️ Why the ads you can't measure are the ones that grow you

Most marketers love the tactics they can measure: the discount email that drives 200 orders by tonight, the search ad with a clear cost-per-sale. What they quietly starve is everything they can't neatly measure — the brand ads that make people feel something and remember your name months later. Analyzing hundreds of campaigns, marketing scientists Les Binet and Peter Field found this instinct backfires, and proposed a fix now known as the 60/40 rule.

Their data pointed to a rough split: spend about 60% on brand building and 40% on sales activation. Sales activation is short-term and targeted — promos, offers, 'buy now' ads that convert people who are already ready. Brand building is long-term and broad — emotional, memorable advertising that reaches people who aren't in the market yet, so your name is the one that surfaces when they finally are.

The trap is that activation looks more 'efficient' on a dashboard because its payoff is instant and trackable, while brand building pays off slowly and diffusely. Chase only the measurable wins and you drain the reservoir of future demand — sales hold up for a while, then quietly stall. The 60/40 split is an average, not a law (B2B and niche brands tilt differently), but the lesson is universal: the hardest-to-measure spending is often what compounds.