“How much should I spend on Google Ads?” is the question I hear most from business owners. The honest answer is that your budget shouldn't be a guess or a round number someone picked. You can work it out from four numbers, and once you see the math, the right range for your business gets a lot clearer. Let's work it out together, one step at a time.

Video transcript

1. How much should you spend on Google Ads? Let's work it out together, one step at a time.
2. Start with how many people search for what you offer each month. Multiply by click-through rate to get clicks. Multiply clicks by cost per click to get your ad spend. Then multiply clicks by your conversion rate to get leads. Netembark campaigns average a twelve to sixteen percent conversion rate. That's an average, not a guarantee.
3. Say a law firm's keywords get six thousand searches a month. At a five point eight seven percent click-through rate, that's about three hundred fifty clicks. At nine eighty-seven a click, that's about thirty-five hundred dollars. That brings in roughly forty-two to fifty-six leads, at about sixty-two to eighty-two dollars per lead.
4. Now a medical practice with four thousand searches. At six point six one percent, that's about two hundred sixty-four clicks. At four seventy-six a click, that's around twelve hundred fifty dollars, for about thirty-two to forty-two leads.
5. And a home improvement company with five thousand searches. At six point four seven percent, that's about three hundred twenty clicks. At eight thirty-three a click, that's about twenty-seven hundred dollars, for thirty-nine to fifty-two leads.
6. Now add a twenty percent cushion, because click prices move. That puts the law firm near forty-two hundred a month, and home improvement near thirty-two hundred. The medical practice comes in under our two thousand dollar minimum, so we'd recommend two thousand.
7. Want your own numbers? Try our free budget calculator at netembark.com/budget-calculator/google-ads, or call (800) 707-2697.

Estimate your Google Ads budget → · Book a call · Call (800) 707-2697

The four numbers behind every Google Ads budget

Every budget I build starts with the same chain of math:

1. Monthly searches: how many people search for what you offer each month in the area you serve.
2. Click-through rate (CTR): the share of those searchers who click an ad. Searches × CTR = clicks.
3. Cost per click (CPC): what each click costs. Clicks × CPC = ad spend.
4. Conversion rate: the share of clicks that turn into leads. Clicks × conversion rate = leads.

Divide your ad spend by your leads and you have your cost per lead, which is the number most owners care about.

How to find your own numbers: Google Keyword Planner (inside your Google Ads account, under Tools) shows estimated monthly searches and bid ranges for the keywords you'd target. Set the location to your actual service area, since searches in your town are what matter. If you've run ads before, your account history gives you real CTR and CPC figures, which beat any estimate.

What counts as a conversion, and what to expect

We count a conversion as a real step toward a customer: a phone call, a form submission or a booked consultation. Across our paid campaigns, we average a 12–16% conversion rate. That's an average, not a guarantee. Your results depend on your market, your offer, your website and how quickly your team follows up.

In the examples below, I use 12% and 16% as the low and high ends so you can see a realistic range instead of one tidy number.

Worked example: three businesses, three budgets

Example only. These use 2026 industry benchmarks for CTR and CPC from WordStream by LocaliQ's Google Ads Benchmarks 2026 (Attorneys & Legal Services, Physicians & Surgeons, and Home & Home Improvement). The search volumes are made up for illustration. Your local numbers will be different.

	Law firm	Medical practice	Home improvement
Monthly searches	6,000	4,000	5,000
CTR	5.87%	6.61%	6.47%
Clicks	~350	~264	~320
CPC	$9.87	$4.76	$8.33
Ad spend	~$3,500	~$1,250	~$2,700
Leads (12–16%)	~42–56	~32–42	~39–52
Cost per lead	~$62–82	~$30–40	~$52–69

Here's the law firm row written out: 6,000 searches × 5.87% ≈ 350 clicks. 350 clicks × $9.87 ≈ $3,500 in ad spend. 350 clicks × 12% to 16% ≈ 42 to 56 leads, which works out to roughly $62 to $82 per lead.

The medical practice and home improvement rows follow the same steps with their own CTR and CPC.

Add a 20% cushion, because click prices move

Click prices aren't fixed. They shift with competition, seasons and how many advertisers are bidding on the same searches. So once you have your base spend, add a 20% cushion.

• Law firm: ~$3,500 + 20% ≈ $4,200 a month
• Home improvement: ~$2,700 + 20% ≈ $3,200 a month
• Medical practice: ~$1,250 + 20% ≈ $1,500 a month

When the math comes in low

The medical practice lands around $1,500, which is under the $2,000 a month in ad spend we recommend at minimum. In that case, we'd recommend $2,000. At $4.76 a click, a $2,000 budget with room for price swings still buys about 350 clicks. A budget that's too thin spreads a small number of clicks across a whole month, which makes it hard to reach enough people or learn what's working.

Every figure in this post is ad spend paid to Google.

Turn your monthly number into a daily budget

Google Ads campaigns run on an average daily budget, not a monthly one. Google's own guidance is to divide your monthly amount by 30.4, the average number of days in a month. Spend can run higher on busy days and lower on slow ones, but Google won't charge more than 30.4 times your average daily budget in a month for most campaigns.

Using the example budgets above:

• $4,200 ÷ 30.4 ≈ $138 a day
• $3,200 ÷ 30.4 ≈ $105 a day
• $2,000 ÷ 30.4 ≈ $66 a day

Re-run the math after your first month

Your first budget is an estimate. Once your campaign has real data, swap the benchmarks for your actual numbers:

1. Pull your real CTR, average CPC and conversions from your account.
2. Make sure calls, forms and booked consults are all being tracked, so your conversion rate isn't understated.
3. Re-run the same four-step math and compare your actual cost per lead to the estimate.
4. If leads come in at a cost per lead you're happy with, and there are still searches you're not reaching, that's a sign more budget could bring more leads.

Frequently asked questions

How do I calculate my Google Ads budget?

Multiply your monthly searches by your expected click-through rate to get clicks. Multiply clicks by your average cost per click to get ad spend. Multiply clicks by your conversion rate to estimate leads. Then add a 20% cushion, because click prices change.

How much should a small business spend on Google Ads per month?

It depends on your industry, location and lead goals, so start with the math above. For most local businesses, we recommend at least $2,000 a month in ad spend so the campaign gets enough clicks to produce leads and useful data.

What is a good conversion rate for Google Ads?

Netembark's paid campaigns average a 12–16% conversion rate, counting phone calls, form submissions and booked consultations. That's an average, not a guarantee. Your rate depends on your market, landing page and follow-up.

Why add a 20% cushion to a Google Ads budget?

Cost per click moves with competition and seasonality. A 20% cushion keeps your ads running through price swings instead of running out of budget partway through the month.

How do I turn a monthly Google Ads budget into a daily budget?

Divide the monthly amount by 30.4, the average number of days in a month. For example, $3,040 a month is a $100 average daily budget.

Want your own numbers?

Try our free Google Ads budget calculator — pick your industry, enter your lead goal, and get a recommended monthly and daily budget with the same 20% cushion used in this post. Or talk it through with us. We're a Google Premier Partner (2023), and we'll walk through your searches, click costs and lead goals with you.

Estimate your Google Ads budget → · Book a call · Call (800) 707-2697 · Email info@netembark.com

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Want a budget built on your own numbers? Book a call or call (800) 707-2697.

Netembark LLC · Google Premier Partner (2023) · 42 E Main St, Suite 202, Freehold, NJ 07728 · (800) 707-2697 · info@netembark.com · @netembark