Setting a Google Ads budget that actually makes money isn't about picking a number that feels safe — it's about working backward from what a customer is worth to you. Most owners pick $10 a day out of thin air, get nothing, and conclude Google doesn't work. The real problem is the budget was too small to buy enough clicks to learn anything.
Start with what a customer is worth
Before you set a dollar amount, know two numbers:
- Average job value: what one new customer pays you. A drain cleaning might be $200. A full detail, $150. A new dental patient over a year, $1,000+.
- Your close rate: of the leads who call, how many actually book. Be honest — for many service businesses it's 30–50%.
These tell you how much a lead is worth, which tells you how much you can spend to get one.
Work the math backward
Say your average job is $300 and you close 40% of leads. Then each lead is worth about $120 to you ($300 x 0.40). If you're willing to spend a quarter of that to acquire a lead, you can pay up to $30 per lead and still come out well ahead.
Now bring in your cost per click. If clicks in your market run $8 and it takes about 5 clicks to get one lead, that lead costs you $40 in ad spend. That's above your $30 target — so either your close rate needs work, your landing page needs to convert more clicks into leads, or this keyword is too expensive. This is the math that turns "is Google worth it?" into a real answer.
Set a budget big enough to learn
Here's the trap with tiny budgets: at $10 a day and $8 clicks, you're buying barely one click a day. You can't learn anything from that, and Google's automated bidding can't optimize on it. As a rough floor, you want enough daily budget to buy 10–20 clicks. In a market with $8 clicks, that's $80–160 a day — which surprises people, but it's the honest number for a real test.
If that's out of reach, narrow your focus instead of underfunding a wide campaign. Run one tight ad group on your highest-intent keywords in your best neighborhoods. A small budget aimed at "emergency [service] [city]" beats the same money spread across 40 loose keywords.
Daily budget vs monthly reality
Google spends by daily budget but can go up to twice your daily cap on busy days (it evens out over the month). Set your daily number at roughly your monthly budget divided by 30.4. So a $2,400 monthly budget is about $79 a day.
Give it a real runway before judging
Don't evaluate after four days. A new campaign needs two to three weeks and 15–30 conversions before the numbers mean anything. Set aside a test budget you're willing to spend to learn — often the first month is tuition, not profit. After that, you'll know your true cost per lead and can scale up, hold, or cut.
Then let the results move the number
Once you know your cost per lead and it's below what a lead is worth, the budget question inverts: spend as much as you profitably can. If every $40 in ad spend reliably returns a $300 job, you don't want a $2,400 budget — you want to buy every one of those you can get. The budget stops being a guess and becomes a dial you turn up as long as the math holds. That's the whole game: fund it enough to learn, measure honestly, then scale what pays.