Why $2.99 feels so much cheaper than $3.00
Thomas and Morwitz discovered in 2005 that our brains start encoding prices before we finish reading them. When we see "$2.99", the leftmost digit "2" gets anchored first—and that first impression biases our entire perception.
This is why nearly every price ends in .99—it's not about saving you a penny, it's about making the price feel a whole dollar less.
You'll see pairs of prices and rate how different they feel to you. Don't calculate—go with your gut. We'll measure your left-digit bias.
Watch how your brain encodes "$2.99" in real-time. The encoding begins before you finish reading the number:
Click to see the encoding process
Your fast, intuitive brain encodes "~$2" while your slow, rational brain is still processing the ".99". By the time you consciously recognize it's nearly $3, the first impression has already biased your perception.
Maximum psychological impact! The left digit changes.
Minimal effect—left digit (3, 2) stays the same.
The left-digit effect appears in surprising places: smokers are more likely to quit when cigarette prices cross a dollar threshold ($5.99→$6.00), people buy more "low-calorie" foods ending in 9 (199 cal vs 200 cal), and stock traders show excess buying at just-below prices ($1.99 vs $2.00).