What is an acceptable acquisition cost?

• ads
• paid
• cac
• spend
• budget
• roas
• acquisition cost
• burn

• What does a {unit} pay in the first twelve months, at gross margin?
• How many months of payment are needed to recover acquisition cost?
• How much cash can the company afford to have out at once?
• Is the channel producing the profile the business can actually serve?

• gross margin per {unit}
• average lifetime or repeat rate
• current cost per {unit} by channel
• cash available and monthly burn

• Cash, not channel performance
• Payback period longer than the company can fund

• If
  Payback is longer than the cash runway
  Then
  The channel is unaffordable at this margin, whatever the return eventually is.
• If
  Payback is short and the channel scales
  Then
  Spend is limited by cash and by {capacity}, not by prudence.
• If
  Cost per {unit} is unknown
  Then
  Cap spend at a level the company can lose entirely, and measure for one month.

Run one channel at a fixed, losable budget for four weeks with attribution recorded, and compute cost per {unit} and payback.

Read after 30 days.

• Payback period is inside what the cash position can fund
• The {unit}s acquired match the customer profile

• Cost per {unit} exceeds gross margin in the first year
• The channel delivers customers the business cannot serve profitably

• Payback is inside the funding window → Scale in steps, re-measuring at each step.
• It is not → Stop the channel and record the threshold as a company fact.

Aury can carry out: read company, prepare campaign, file memory, flag risk. Specialists involved: growth, finance.

Your approval: Aurygine never spends money. Budgets and channel launches are approved and executed by the founder.

Requires gross margin to be known. Without margin, cost per {unit} is a vanity number.

Attribution is imperfect in every channel, and short windows over-credit last-click. Aurygine holds no benchmark for what a good cost per {unit} is in your industry, and will not invent one.

• Sourced operator experience: Founder/operator case study analysed inside Aurygine — bootstrapped B2B software company, 2026
• Sourced operator experience: Payback-period discipline, standard in bootstrapped acquisition
• Aurygine synthesis: Aurygine synthesis across founder journeys

Confidence: medium. Last reviewed 2026-08-25. Your company's own recorded results override this playbook whenever the two disagree.