It is the first question almost every local business owner asks, and the honest answer is that there is no single number. What matters is not how much you spend, but whether the amount you spend is enough to buy the data Google needs to work with. Below that threshold, advertising tends to feel like guesswork.
Start with cost per click, not with a monthly budget
Most people pick a round number — five hundred a month, a thousand a month — and work backwards. That is the wrong order. The number that decides everything is your cost per click, and it varies enormously by industry and by location.
A click on a search for a local hair salon might cost a small fraction of what a click on a personal injury lawyer search costs, in the same city, on the same day. Legal, insurance, cosmetic surgery, water damage restoration and similar high-value services sit at the expensive end. Everyday local services sit far lower.
So the first step is finding out what a click actually costs for your services in your area. That figure sets the floor for everything that follows.
The clicks-per-day test
Here is a simple way to sanity-check any budget before you commit to it:
- Find the typical cost per click for your service in your area.
- Multiply it by 15 to 20. That is a realistic daily budget.
- Multiply that by 30 for a monthly figure.
Why 15 to 20 clicks? Because below roughly that volume, you are not generating enough data for anyone — you, an agency, or Google's own bidding systems — to tell the difference between a campaign that is working and one that is not. You end up making decisions on noise.
Why spreading a small budget thin fails
The most common mistake is not spending too little. It is spending a small amount across too many things — every service, the whole metro area, several campaign types at once. The budget gets divided until no single part of it gets enough traffic to prove anything.
A smaller budget concentrated on your most profitable service, in the area you most want customers from, will almost always outperform the same budget spread across everything you offer.
What your budget cannot fix
Budget will not rescue a campaign leaking money in the background. Before increasing spend, it is worth confirming three things:
- You are only paying for searches from people who could realistically become customers — not job seekers, students, DIY researchers or competitors.
- Your targeting actually matches your service area, rather than a radius that quietly includes towns you do not serve.
- Calls and form submissions are being tracked, so you can see which spend produced real enquiries.
Without that third point in particular, a bigger budget just means spending more money you cannot measure.
A realistic expectation for month one
Your first month is largely about learning. You are finding out which searches convert, which do not, and what a lead genuinely costs you. Campaigns typically need a few weeks of consistent spend before the picture is stable enough to make confident decisions.
Plan for that. A budget you can sustain for three months will teach you far more than a larger one you stop after three weeks.