E-commerce
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Payback Period
How many months until a customer’s contribution recovers CAC. It is a cash view, not just an LTV:CAC ratio.
Detailed explanation
A simple version is CAC ÷ monthly gross-profit contribution (or contribution margin × AOV × repeat). Ignoring returns and payment terms makes payback look faster than it is.
Short payback allows more aggressive media. Long payback without cash reserves makes scaling risky.
First-month discounts stretch payback. A campaign can claim “lower CAC” while only deferring revenue.
Frequently asked questions
- What is a good payback?
- It depends on cash. Many ecommerce teams want 1–3 months; high-LTV B2B may accept longer.
- Why not just use ROAS?
- ROAS talks revenue. Payback talks cash. High ROAS with thin margin still pays back slowly.
Related terms
Internal links for the topic cluster — read these concepts together.
- CACCustomer Acquisition Cost: the average cost to win a new customer. If media is the only input, the number looks cheaper than it is.
- LTV:CAC RatioLifetime value divided by customer acquisition cost. It summarizes how many times a customer covers what it cost to win them.
- LTV (Customer Lifetime Value)LTV is the estimated total revenue a customer will generate for a company over the course of their relationship with the brand; it's a core metric for evaluating long-term marketing return.
- Profit MarginProfit Margin is a core financial performance indicator that shows the percentage of a business's total revenue that becomes actual profit, revealing how much of sales converts into real earnings.
- Breakeven PointBreakeven Point is the financial concept describing the sales volume or revenue level at which a business's total revenue exactly equals its total fixed and variable costs — the point of neither profit nor loss.