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Peak Atlas

Problem · Rising ad costs

Every customer gets more expensive. Does it earn that back?

Rising ad costs only become a problem when new customers no longer earn back their acquisition cost. Work out how many orders and months that takes.

Calculate customer acquisition costUnderstand the causes

Plausibility check

What does a customer cost? And when is it paid?

Enter the values of a typical month. Count new customers, not orders.

€

First-time buyers, not orders.

After goods, shipping and fees, before advertising.

€

Cost per new customer

80,00 €

A new customer needs 3.6 orders until the ad costs are earned back, at your buying rhythm about 21.8 months.

CAC = ad costs ÷ new customers · Payback = CAC ÷ contribution margin per order

Assumptions and limits

  • The calculation spreads all ad costs across new customers. Ads that reach existing customers make the value look more expensive.
  • Orders per customer is an average. Many customers buy only once, a few very often.
  • Salaries and agency costs for marketing are missing. Add them if you want to see the full costs.

Your entries stay in this browser. Nothing is saved or sent.

How you'll notice

The budget goes up. New customers don't, to the same degree.

  • For the same number of new customers, you need more budget every quarter.
  • Nobody can say after how many orders a customer becomes profitable.
  • Channels are compared by cost per click, not by cost per customer won.

Understand the causes

Where rising costs come from come per customer.

  1. 01

    The audience is exhausted

    How you'll notice
    Costs rise while reach stagnates.
    Why it happens
    The cheapest customers are won; each additional one is harder to reach.
    What helps
    Test new audiences or channels with a small budget before raising the main budget.
    Limit
    Tests need time and budget before they allow a conclusion.
  2. 02

    Repeat purchases aren't used

    How you'll notice
    Payback takes longer than a year.
    Why it happens
    Customers buy once and don't come back, so the first order has to carry everything.
    What helps
    Measure your repeat purchase rate and deliberately encourage the second order, instead of only buying new customers.
    Limit
    For products bought rarely, the first order stays decisive.
  3. 03

    Existing customers get paid for too

    How you'll notice
    Campaigns reach many who would have bought anyway.
    Why it happens
    Brand terms and retargeting pick up existing customers and make the new-customer number look more expensive.
    What helps
    Evaluate new-customer and existing-customer campaigns separately.
    Limit
    A clean separation isn't possible in every ad account.
  4. 04

    Contribution margin has dropped

    How you'll notice
    Cost per customer is the same, but payback takes longer.
    Why it happens
    Discounts, shipping, or purchasing have reduced the contribution margin per order.
    What helps
    Check contribution margin per order before you touch the ad budget.
    Limit
    Sometimes margin is the problem, not advertising.

Ways to solve it

Cost per customer keep in view.

Ways to fix rising ad costs, compared
WayEnough ifLimit
Monthly bill in a spreadsheetYou have one or two channels and count new customers from the shop.No breakdown by channel or cohort.
Reporting in the ad accountsYou want to optimize cost per click and campaigns within one channel.Each account sees only itself and no margin.
Analysis of repeat purchases by cohortYou want to find out how much one customer brings in over time.Needs clean customer data over several months.
Peak OneYou want to see ad spend, cost per customer, and channel efficiency together.Marketing Payback is planned; until then, calculate payback with the calculator above.

Peak One in action

From the expense to the profitable channel.

  1. TriggerDo we earn more from customers than it costs to win them?
  2. 01 · BudgetSignalAd Spend shows how much is spent on advertising and for what.
  3. 02 · CustomerUnderstandingBlended CAC shows what a customer costs on average.
  4. 03 · ChannelDecisionChannel Efficiency and LTV:CAC show which channels bring profitable customers.
  5. 04 · TaskActionThe budget shift becomes a task in Peak Board, with a date for the next review.
Result: Budget follows the channels whose customers earn back their costs.

The apps for it

In Peak One.

Three steps

Before you cuts the budget.

  1. 01 / 03

    Count new customers

    For the last three months, note the number of first-time buyers and the ad spend per month.

  2. 02 / 03

    Calculate the payback

    With the calculator above, work out after how many months a new customer has earned back their cost.

  3. 03 / 03

    Set a limit

    Set a maximum payback period your liquidity can carry, and check channels above it.

Frequently asked questions

Briefly answered.

What is a good CAC?

One the customer earns back in a time you can afford. What matters is the ratio to contribution margin per customer, not the absolute value.

Should I cut the budget when costs rise?

First check whether the payback still works. Rising cost per customer is fine if customers bring in correspondingly more. Cut channels first whose customers don't buy again.

What is the difference from a good ROAS?

ROAS evaluates individual orders. CAC and payback evaluate customers over their lifetime. For the order level, there is the Break-even ROAS calculator.

Keep exploring

What's included.

Welt Control

✦ A Peak principle

Growth starts with what exists. Not at the next channel.

Exhaust first, then expand

More problems

Typical bottlenecks in growing companies, each with a tool you can try right away, the causes, and the path Peak One provides for it.

Alle Probleme

Solve it once. The rest follows.

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