Cost of growth is what you spend to acquire and retain customers and to add or improve products. If that cost is too high relative to the value those customers or products create, growth isn’t sustainable. Here’s how to think about it and how to measure it with a simple cost growth tool set.
Customer Acquisition: LTV and CAC
The cost of acquiring a customer (CAC) should be lower than the value that customer will generate over time (LTV). A common rule of thumb is LTV:CAC ≥ 3:1 and payback period under 12 months. Use our LTV Calculator to compute LTV, LTV:CAC, and payback so you can see whether your acquisition cost is in a healthy range.
Product-Level Profitability
Growth that comes from products that lose money (after COGS, shipping, fulfillment, returns) increases total cost without enough upside. The Product Profitability Analyzer shows net profit and margin per product so you can grow with products that actually contribute profit.
Pricing and Bundles
Price and bundle changes directly affect margin and the cost of delivering value. The Pricing & Bundling Simulator lets you model price and bundle scenarios before you launch, so you can grow revenue without eroding profitability.
Bringing It Together
Cost of growth is not a single number—it’s the combination of acquisition cost (CAC vs LTV), product cost (profitability per SKU), and pricing (margins and bundles). Use the tools above together; for the full set of free profitability tools and more, see our tools hub.