The Math Behind Cash Positive Growth

There is a simple equation at the heart of every healthy business. The money you spend to acquire a customer must be less than the money that customer generates over their lifetime.

This is called the LTV to CAC ratio. Lifetime value divided by customer acquisition cost. If this number is above three, you are in good shape. If it is below one, you are lighting money on fire.

Most venture backed startups ignore this ratio in their early stages. They spend thousands of dollars acquiring customers who generate hundreds in revenue. The justification is always the same: we will figure out monetization later.

At A Foundery, we figure out monetization first.

Here is how the math works for a typical portfolio company. Let us say it costs five hundred dollars in time and effort to acquire a new client. That client pays two thousand dollars per month and stays for an average of eighteen months. The lifetime value is thirty six thousand dollars. The ratio is seventy two to one.

Those are real numbers from a real company in our portfolio.

Why are the numbers so good? Because service businesses with strong delivery have incredibly low churn. When you do great work for a client, they do not leave. They have no reason to. Switching costs are real. The relationship matters. The quality is consistent.

The acquisition cost stays low because we do not rely on expensive marketing. Cold outreach, referrals, and network effects drive most of our growth. These channels cost time but very little money.

The math also improves over time. As delivery becomes more efficient through better SOPs and more experienced teams, the cost to serve each client drops. Revenue per client stays the same or increases. Margins widen.

This is what cash positive growth looks like. Every new client makes the business stronger. Every month, the gap between revenue and costs widens. The business generates more cash, which funds more growth, which generates more cash.

The math is simple. Following it is the hard part.