Payback period
The time, usually measured in months, that it takes for a business to recover its customer acquisition cost from a customer's gross margin.
Payback period is the length of time it takes for a company to earn back the cost of acquiring a new customer. Typically measured in months, this metric is a critical indicator of capital efficiency, especially for subscription-based businesses. It answers a simple question: how quickly does a new customer's revenue pay for the sales and marketing investment required to win them? A shorter payback period means the business can fund its own growth more quickly.
How to Calculate Payback Period
The formula for payback period divides the total cost of acquisition by the gross-margin-adjusted revenue a customer generates in a given period, usually a month or a year. Factoring in gross margin is essential, as it accounts for the cost of servicing the customer.
The standard formula is:
Payback Period (in months) = Customer Acquisition Cost / (Average Revenue Per Account per month × Gross Margin %)
For example, if a company spends $6,000 to acquire a customer that generates $500 in monthly recurring revenue at an 80% gross margin, the payback period is 15 months ($6,000 / ($500 × 0.80)).
Why Payback Period Matters
Payback period is a key indicator of a company's financial health and the sustainability of its go-to-market strategy. While the LTV:CAC ratio measures the long-term profitability of a customer, payback period measures the short-term speed of capital recovery. A company with a long payback period requires more working capital to fuel growth, as money spent on acquisition is tied up for longer.
SaaS benchmarks vary by sales motion. A typical sales-led growth model might aim for a payback period of 12 to 18 months, whereas a more efficient product-led growth model may achieve it in under 6 months.
Also known as: CAC payback, CAC payback period
