Are You Spending Too Much on Ads? A Practical Audit of Your Acquisition Costs

You are spending too much on ads when the customers you acquire do not create enough contribution to justify the full acquisition cost. The answer depends on your margins, sales conversion and cash flow, rather than a universal cost per click.

For Irish SMEs, the same monthly budget can be sustainable in one business and damaging in another. Before cutting everything or adding more spend, establish what each customer is worth and what you are actually paying to win them.

Calculate a usable acquisition measure

Start with advertising spend divided by the customers acquired over a relevant period. Then add management, creative and other acquisition costs to understand the wider picture. Keep the time period consistent with your sales cycle.

For example, €1,500 in media spend producing ten attributable new customers gives a media-only acquisition cost of €150. If each customer contributes €120 after direct delivery costs, the first transaction does not cover that advertising cost. Future retention may help only if supported by reliable evidence.

Check whether your reported conversions are meaningful

A page view, button click, submitted form and completed purchase are different events. Verify which actions the campaign is optimising towards and whether they reflect your objective. Test forms and orders, confirm values and currency, and check for duplicate events.

Review platform reporting alongside your CRM, Shopify orders or enquiry log. Attribution differences are normal; a report that cannot be reconciled at all needs attention before it guides spending decisions.

Look for five common sources of waste

• Irrelevant demand: searches or audiences that do not fit the offer.
• Wrong locations: enquiries you cannot serve commercially.
• Weak destinations: generic pages, missing details or broken checkout steps.
• Poor economics: offers whose margin cannot support acquisition.
• Lost follow-up: suitable prospects who never receive the promised response.

Make reductions deliberately

Pause or adjust activity with a clear reason, such as unavailable stock, irrelevant search themes or a broken destination. Avoid judging every advert after a handful of clicks or making several major changes at once.

Separate existing-customer sales from new customer acquisition where possible. A strong remarketing report may not show how much additional demand the business created. Consider total revenue and contribution alongside channel metrics.

Protect cash flow while testing

Agree a spending ceiling, review dates and a point at which the test should stop or change. A profitable order on paper can still create pressure when stock and advertising must be paid long before the cash is available.

Use a weekly view of spend, suitable enquiries, sales, contribution and outstanding payments. This makes the decision to scale more concrete.

Frequently asked questions

Is a high ROAS enough to justify increasing spend?

No. Check margins, returns, fulfilment, acquisition fees and whether the reported orders represent additional business.

Should I stop all ads if performance looks weak?

Investigate the cause first. A tracking problem, poor landing page and commercially unviable offer require different responses.

Brand Depot reviews advertising alongside business constraints. Explore Google Ads management, Meta Ads management and growth consultancy, or discuss your current advertising costs.