The honest answer to "how much should I spend on Google Ads" is: enough to get real data, tied to what a customer is worth to you — not a random number you picked because it felt safe. Most small businesses either underspend so badly they never learn anything, or overspend before they've fixed the leaks. Here's how to size it properly.
Work backward from a customer's value
Start with the math that actually matters. If a new customer is worth $500 to you and you close one in five leads, you can spend up to $100 per lead and break even — more if that customer comes back. A business with a $50 ticket and no repeat visits has a completely different budget than a roofer landing $12,000 jobs.
- Average sale value × how often they return = customer lifetime value
- Divide by your close rate to find what a lead can cost
- That number sets your ceiling, not your comfort level
The minimum that isn't a waste
Google Ads needs data to work. Below roughly $500–1,000 a month in most local markets, you won't get enough clicks and conversions to learn what's working, and you'll conclude "ads don't work" when really you never gave them a chance. If you can't commit at least a few hundred dollars a month for 90 days, wait until you can.
Typical ranges by business type
These are real-world starting ranges, not promises — your market and competition move them a lot:
- Local service (plumber, detailer, gym): $1,000–3,000/month
- Competitive trades (HVAC, legal, dental): $3,000–10,000/month
- High-ticket / long sales cycle: often $5,000+ because clicks are expensive
In pricey categories a single click can cost $20–50, so a small budget disappears in a day. Know your market's click cost before you set a number.
Budget for the whole funnel, not just clicks
The ad spend is only part of it. If you send clicks to a weak website with no clear phone number, you're paying for traffic that bounces. Spend some of the budget — or the effort — on a landing page and tracking, or the ad money leaks out the bottom.
Start small, prove it, then scale
Don't dump your annual budget into month one. The smart sequence:
- Start at the low end of your range for 60–90 days
- Get conversion tracking working so you can see cost per lead
- Once cost per customer is profitable, add budget to what's working
- Scale up while the numbers hold, pull back when they don't
Know when spending more stops paying
More budget isn't always better. At some point you've captured most of the high-intent searches in your area, and extra spend just buys weaker clicks at a worse cost per lead. Watch your cost per conversion as you scale — when it climbs past your ceiling, you've found your ceiling.
There's no universal right number. There's the number your customer value, your close rate, and your market's click costs will support — spent long enough to learn, on a funnel that actually converts. Get those right and the budget question answers itself: spend more when it's profitable, less when it isn't.