Marketing
Google Ads Budget for Small Business: How to Calculate It
How to set a Google Ads budget for a small business: work back from target cost per lead and break-even ROAS, plan a test phase and avoid wasted spend.
Practical digital know-how for SMEs
A high ROAS can still lose money if your margin is thin. Enter ad spend, other marketing costs, revenue and gross margin to see ROAS, real ROI after costs, CAC and the ROAS you need to break even.
This campaign is profitable at the margin you entered.
Formulas: ROAS = revenue ÷ ad spend. ROI = (revenue × margin − all marketing costs) ÷ all marketing costs. CAC = all marketing costs ÷ new customers. Break-even ROAS = 1 ÷ margin.
Enter the ad spend for the period you want to evaluate, for example one month.
Add other marketing costs for the same period, such as agency fees or tools.
Enter the revenue attributed to the campaign and your average gross margin.
Optionally enter the number of new customers to get your customer acquisition cost.
Compare your ROAS with the break-even ROAS: below it, the ads cost more than they earn.
ROAS divides revenue by ad spend and ignores your costs of delivering the product. ROI compares profit after all marketing costs with those costs, so it shows whether the campaign actually made money.
Divide 1 by your gross margin. With a 40 % margin, break-even ROAS is 1 ÷ 0.4 = 2.5, so every unit of ad spend must bring in at least 2.5 units of revenue to cover itself.
For a full CAC, include all sales and marketing costs of the period: ad spend, agency and freelancer fees, tools and, if you can estimate it, the share of staff time spent on acquisition.
It depends on your margin, repeat purchases and other costs. A ROAS that is comfortably above your break-even ROAS is a better yardstick than any generic target.
Marketing
How to set a Google Ads budget for a small business: work back from target cost per lead and break-even ROAS, plan a test phase and avoid wasted spend.
KPIs
How to calculate customer acquisition cost: the CAC formula, which costs to include, blended vs paid CAC, CAC payback and LTV:CAC, with worked examples.
KPIs
The marketing KPIs small businesses should track, with formulas, review frequency and a one-page dashboard layout. Focus on numbers that drive decisions.
KPIs
ROAS vs ROI explained: formulas, a worked example with margin, how to find your break-even ROAS and which metric to use for which marketing decision.
| # | Tool | What it does | You enter | You get |
|---|---|---|---|---|
UTM Link Builder | Build clean campaign URLs with utm_source, utm_medium and utm_campaign. Presets for email and social, automatic checks and one-click copy. | Landing page URL, source, medium, campaign | A clean, tagged campaign link to copy | |
SERP Snippet Preview & Pixel Checker | Preview your title tag and meta description as a Google result on desktop and mobile. Pixel-width check shows what will likely get truncated. | Title tag, meta description, URL, keyword | Google preview with pixel-width check | |
Process Automation ROI Calculator | Estimate hours saved, yearly savings, payback period and 3-year ROI of automating a business process. Includes software and maintenance costs. | Task frequency, minutes, hourly cost, tool costs | Hours saved, net savings, payback period |