How Much to Spend on Google Ads
Step 1: Start With Your Sales Goal
How many new customers or jobs do you want from Google Ads each month? Start with a realistic number.
Step 2: Know Your Close Rate
Out of every 10 leads, how many become customers? If you close 3 of 10, your close rate is 30 percent.
Leads needed = new customers wanted ÷ close rate
Step 3: Estimate Your Cost Per Lead
Cost per lead depends on what a click costs and how many clicks turn into calls or forms.
Cost per lead = average cost per click ÷ conversion rate
Google Keyword Planner shows estimated click costs for your services and area. A well-built landing page with tracking in place helps your conversion rate.
Step 4: Do the Math
Monthly budget = leads needed × cost per lead
Subheading:
- Goal: 6 new jobs per month
- Close rate: 30 percent, so 20 leads are needed
- Average cost per click: $6
- Conversion rate: 8 percent, so each lead costs about $75
- Budget: 20 leads × $75 = about $1,500 per month in ad spend
Then check it against what a customer is worth. If an average job brings in $2,000 in profit, spending $250 to get one customer is a strong return.
Tips Before You Launch
- Set up call and form tracking first. Without it you cannot see your cost per lead.
- Start with your most profitable services and your core service area.
- Add negative keywords to block searches for jobs, free, DIY and services you do not offer.
- Give a new campaign time to learn. Judge results after 60 to 90 days, not the first week.
- Budget too small to get steady leads? Narrow the area or services before spreading it thin.





