Bundling gets used as a blunt discounting tool: put three products together, knock ten percent off the combined price, call it a value pack. That's a promotion, not a pricing strategy, and it trains customers to expect the bundle discount permanently while doing nothing for margin.
Bundle to Sell the Slow Mover, Not to Discount the Fast One
I design bundles around moving inventory or attention toward products with better margin or slower natural velocity, using the popular product as the draw rather than discounting the popular product itself. Pair a strong seller at full price with a complementary item that has thinner organic demand but healthy margin, and the customer perceives added value while the blended margin on the transaction actually improves rather than degrades.
That's the opposite of how most bundles get built, where the instinct is to discount the hero product to drive the sale. The hero product doesn't need the discount. It needs a companion that benefits from the association.
Test Elasticity Before Scaling the Bundle
Before I roll a bundle out broadly, I test it against straight unit sales of the same products separately, tracking whether the bundle increases total units per transaction or simply cannibalizes what the customer would have bought anyway at full margin. A bundle that increases average order value without increasing overall discount depth is doing its job. One that just repackages what would've sold anyway at a lower blended price is a margin leak wearing a growth costume.
Bundling done well is a merchandising tool that raises average order value and clears inventory intelligently. Done carelessly, it's a permanent discount you've talked yourself into calling a strategy.