Latest / The Pricing Marketing Podcast with Fexingo: Price Anchoring, Bundling, and Conversion Pricing / The Rule of 100 in Pricing Discounts
Transcript
- Lucas: Luna, have you ever noticed how a ten-dollar discount on a twenty-dollar item feels like a steal, but the same ten bucks off a two-hundred-dollar purchase barely registers? Luna: Absolutely. And I always assumed it was just because ten dollars is a bigger share of the smaller price. Lucas: That's part of it, but there's a more specific psychological rule at play. It's called the Rule of 100, and it's a powerful pricing tactic that tells you exactly when to use percentage discounts versus dollar discounts. Luna: I've heard the term, but I never quite understood the boundary. Is it really that precise? Lucas: It is. The rule, which comes from research by marketing professor Akshay Rao at the University of Minnesota, says this: if the product's price is below 100 dollars, consumers respond better to a percentage discount. If it's above 100 dollars, they respond better to an absolute dollar amount. Luna: So a 50-dollar sweater should be advertised as 30 percent off, not 15 dollars off? Lucas: Exactly. At 50 dollars, 30 percent off is 15 dollars — same absolute savings. But 30 percent feels bigger because our brains are wired to compare percentages relative to the price. Below 100 dollars, the percentage number is usually a larger digit than the dollar figure, so it grabs attention. Luna: And once you cross 100, you flip it. A 200-dollar jacket at 10 percent off saves 20 dollars. But 10 percent sounds small, while 20 dollars sounds like real money. Lucas: Right. The threshold is the number 100 itself. Above that, consumers anchor on the dollar amount because it's a substantial, concrete number. Below it, they process the percentage as the more meaningful signal. Luna: I recall seeing a furniture ad that said '500 dollars off' rather than '25 percent off' on a 2,000-dollar couch. That fits perfectly. Lucas: That's a textbook application. And the rule works in reverse for discounts that are framed as surcharges or premiums. But in standard discounting, it's remarkably consistent across many product categories. Luna: Are there any exceptions? What about luxury goods where a dollar discount might seem tacky? Lucas: Interesting point. For high-end brands, percentage discounts can feel more elegant — '20 percent off' versus '200 dollars off' — because the absolute number might seem gaudy. But even there, the Rule of 100 often holds. The key is knowing your audience and the context. For most retail and e-commerce, the rule is a reliable guide. Luna: So if I'm a small business owner setting up a sale on products that range from 30 to 300 dollars, I need to advertise each item's discount differently based on its price. Lucas: Exactly. That's the practical takeaway. You don't use a one-size-fits-all discount message. You tailor the frame: percentage for items under 100, dollar amount for items over 100. And if you have a mix, you can even test which version drives more conversions. Luna: I wonder how this plays into subscription pricing. Many software tools price plans at, say, 99 dollars a month — just under the threshold. Lucas: That's another layer. Products priced right at 99 dollars are common because they sit just below the 100-dollar mental barrier. But when discounting such a plan, you'd want to use a percentage discount, since 99 is below 100. A 20 percent discount feels bigger than 19.80 dollars off. Luna: Right, and if the plan is 149 dollars, you'd say '30 dollars off' instead of '20 percent off,' because 30 dollars is a bigger number. Lucas: You've got it. And this ties back to anchoring: the discount format anchors the consumer's perception of the deal. A well-framed discount can make the same savings feel much larger. Luna: You know, Lucas, I really appreciate these deep dives into pricing psychology. They've changed how I look at every sale sign I pass. Lucas: That's exactly the kind of feedback that makes producing this show worthwhile. And it reminds me — if these marketing conversations have sparked ideas you've actually used in your work, or if you simply value having an ad-free space to explore them, listener support is what keeps the show independent. You can help at buy me a coffee dot com slash fexingo. Luna: Yeah, it's a small way to say this content matters to you — and it helps us keep bringing in guests and research without any commercial breaks. Lucas: Speaking of research, let's get back to the Rule of 100 and look at a real-world test. In one study, a retailer offered the same discount on a 45-dollar item: one group saw '30 percent off,' another saw '13.50 dollars off.' The percentage group had a significantly higher purchase rate. Luna: And on a 160-dollar item, the dollar discount outperformed. That's exactly what the rule predicts. Lucas: Yes. And the interesting nuance is that the rule applies not just to discounts but to any numeric comparison. For example, when framing a surcharge or an increase, the opposite may hold. But for markdowns, it's remarkably robust. Luna: So next time I see a 'Save 10%' sign on a 500-dollar TV, I'll know the store might be leaving money on the table by not saying 'Save 50 dollars.' Lucas: Exactly. That 10 percent looks anemic next to 50 dollars. The Rule of 100 is a simple but powerful tool for any marketer or business owner. And it's one of those insights that, once you know it, you see it everywhere. Luna: Alright, Lucas, I'm going to start testing this on my own shopping decisions. But I have one more question: does the rule hold for B2B purchases where the ticket prices are much higher, like thousands of dollars? Lucas: It can, but at that scale, other factors like negotiation context and relationship matter more. In B2B, dollar amounts are almost always preferred because the savings are large in absolute terms. But if you're selling a 5,000-dollar service, saying '20 percent off' is 1,000 dollars — both numbers are significant. I'd test both formats. The rule is a starting point, not an iron law. Luna: Fair enough. So the takeaway: for consumer goods under 100 dollars, lead with percentage; over 100, lead with the dollar amount. And for anything in between, test. Lucas: That's a perfect summary. And with that, you can walk into any store or launch any promotion with a smarter pricing lens. Thanks for listening, and see you next time. Luna: See you, Lucas.