How Much Should You Spend on Google Ads? A Practical Way to Set Your Budget

“How much should I spend on Google Ads?” is usually the first question I get on a call, and it’s a fair one. Google lets you start with any amount, so there’s no official minimum to point to. That’s part of the problem: a lot of businesses pick a number that feels safe, run ads for a month, get a handful of leads, and decide Google Ads doesn’t work.

In my experience, the budget is rarely wrong because it’s too high. It’s wrong because nobody worked out what the account needed to produce enough data to learn from. Here’s how I set a starting budget, why very small budgets tend to fail, how to split the money, and when to spend more.

The short answer

For most small and mid-size businesses running lead generation campaigns, I recommend starting with $1,500–$2,000 a month in ad spend. That’s my own guidance, not a Google rule, and it’s based on what I’ve seen work across 50+ industries over 7+ years.

Below that, it often takes much longer to collect enough conversions to know what’s working. Above that, the right number depends on your market, your cost per click and how many leads you can handle. The better answer is to calculate it, by hand with the formula below or with my free Google Ads budget calculator.

The formula: budget from cost per click, conversion rate and target cost per lead

Your budget only needs three inputs:

1. Expected cost per click (CPC). What you’ll typically pay for one click on your main keywords.
2. Expected conversion rate. The share of clicks that turn into a lead, call, booking or sale.
3. How many conversions you need per month. Enough to get real data, and enough to make the effort worth it.

From the first two, you get your expected cost per lead:

Expected cost per lead = CPC ÷ conversion rate

And from that, your monthly budget:

Monthly budget = conversions needed per month × expected cost per lead

Then do one sanity check against your economics:

Maximum affordable cost per lead = value of a new customer × lead-to-customer close rate

If the expected cost per lead from the first formula is higher than what you can afford from the last one, you don’t have a budget problem. You have a conversion rate, offer or pricing problem, and spending more won’t fix it.

If you’d rather not do the math by hand, the budget calculator runs both formulas for you.

Where to get the inputs

• CPC: Google’s Keyword Planner gives estimated top-of-page bid ranges for your keywords and location. Industry benchmarks are a useful cross-check. For example, LocaliQ’s 2026 search advertising benchmarks put the average CPC across industries at $5.42.
• Conversion rate: If you’ve run ads before, use your own data. If not, start with a benchmark. The same LocaliQ report puts the cross-industry average conversion rate at 8.18%, but the spread between industries is wide.
• Conversions needed: For a starting point, I aim for roughly 30 conversions a month. Google’s own guidance on evaluating a Target CPA strategy recommends looking at the last 30 days with at least 30 conversions, which is a sensible bar for judging results too.

A worked example (hypothetical)

The numbers below are a hypothetical example for a dental clinic, using LocaliQ’s industry averages as inputs. They are not a client result.

• Expected CPC: $8.00 (LocaliQ’s average for Dentists & Dental Services)
• Expected conversion rate: 10.67% (same source)
• Expected cost per lead: $8.00 ÷ 0.1067 ≈ $75
• Conversions wanted per month: 30
• Monthly budget: 30 × $75 = $2,250, or about $74 a day

That buys roughly 280 clicks a month, or around 9 a day.

Now the sanity check. Say a new patient is worth $1,000 in gross profit over their first year, and the clinic turns 1 in 3 leads into a patient. The maximum affordable cost per lead is $1,000 × 33% ≈ $330. An expected $75 is well inside that, so the budget makes sense.

At $600 a month, the same clinic would get roughly 75 clicks and about 8 leads: very little to learn from.

Benchmark inputs by industry

These are averages from LocaliQ’s 2026 search advertising benchmarks, which are based on thousands of customer campaigns across Google Ads and Microsoft Ads. The last column is my own calculation (30 × average cost per lead), to show roughly what 30 leads a month would cost at the average.

Source: LocaliQ / WordStream, 2026 Search Advertising Benchmarks. Averages hide a lot: your city, your competitors and how specific your service is can move these numbers a long way in either direction.

Treat these as a starting estimate, not a forecast. If you’re in one of these fields, I go into more detail on Google Ads for law firms, dentists, med spas, physical therapists and landscaping companies.

Why too-small budgets fail

A small budget isn’t wrong in itself. The issue is what happens to the data.

The learning period needs conversions

When you launch a campaign on an automated bid strategy, or change one, Google shows a “Learning” status while the system calibrates. Google says the length of that period depends mainly on how many conversions the campaign gets, how long your conversion cycle is, and the bid strategy, and that it typically takes one to two conversion cycles. Google’s documentation on conversion goals also describes a 7–14 day learning phase and advises against frequent changes to budgets, targets or conversion goals during it.

With a tiny budget, a campaign might get two or three conversions a week. The system has very little to learn from, and the learning drags on.

Small numbers are mostly noise

Say you get 6 leads one month and 10 the next. Did something improve, or was it luck? With numbers that small, you can’t tell. One extra lead changes your cost per lead by 10–15%.

With a few dozen clicks per keyword, you also can’t say which keyword, ad or landing page is better. You end up deciding on gut feel, or changing things too early and resetting the learning.

Budget gets spread too thin

A small budget split across many keywords, several campaigns and a wide area means each piece gets a few clicks a day. Nothing gets enough volume to prove itself. If the budget is small, narrow the focus instead: fewer services, a tighter area, your highest-intent keywords.

This is why the first 30 days of any account I take on are about learning and testing, and scaling usually happens in months two and three. That timeline only works if the budget produces enough conversions in month one to learn from.

How to split your budget across campaign types

There’s no fixed formula, but this is my usual starting point for a local lead generation business. Your situation may call for something different.

• Search campaigns on high-intent, non-brand keywords: most of the budget. People searching “emergency dentist near me” or “family lawyer [city]” are the closest to buying. This is where I put the bulk of spend first.
• Brand search: a small slice. If people search for your business by name, a cheap brand campaign protects that traffic from competitors. Brand clicks are usually inexpensive, so this rarely needs much.
• Remarketing: a small slice, once there’s traffic. Showing ads to people who visited but didn’t convert. It needs a decent audience size before it’s worth much.
• Performance Max: later, not first. PMax leans heavily on conversion data, so on a new account I prove the offer and tracking with Search first, then test PMax once conversions are flowing. Watch whether it’s mostly picking up your brand searches; I cover that in why Google Ads aren’t converting.

How daily budgets actually work

Google Ads works on an average daily budget. Google says a campaign can spend up to twice its average daily budget on a given day, but won’t spend more than 30.4 times the daily budget over a month. So to target a monthly figure, divide it by 30.4. A $2,000 monthly budget is about $66 a day.

When should you increase your Google Ads budget?

I look for these signs before recommending more spend:

1. Your cost per lead is stable and below your maximum affordable cost per lead. At least a full month of data, ideally two.
2. Campaigns are limited by budget. The status column shows “Limited by budget”, or you’re losing a meaningful share of impressions to budget (check the “Search lost IS (budget)” column).
3. Leads are turning into customers, not just form fills.
4. You can handle more leads. They’re only useful if someone answers the phone.

When those are true, increase in steps rather than doubling overnight, and give each step time to settle. Remember Google’s advice about avoiding frequent budget changes during the learning phase.

A real example: for Bennett and Fitzgerald, a law firm, leads went up 30% and cost per lead dropped 25%. Those results are what gave the firm the confidence to increase its budget and scale the campaigns. The order matters: prove efficiency, then add spend.

How to judge whether your budget is working

• Give it enough time. The first month is mostly learning. Judge on 30 days or more, and on enough conversions to mean something.
• Measure cost per lead (or per sale), not clicks. Cheap clicks that don’t convert are expensive.
• Check lead quality. Ask how many leads became customers. If your tracking can’t answer that, look at an analytics and tracking setup before adding budget.
• Watch the trend over months two and three. Improvements compound. At Radiance MedSpa, cost per lead went from $142 to $89 over six months, mostly by fixing the landing page and what counted as a conversion, not by spending more.
• Compare against what a customer is worth. A $130 lead is cheap if the client is worth $5,000.

If you’re not sure whether your current spend is set up to succeed, a Google Ads audit will tell you where budget is being wasted and whether the account has enough data to optimize.

What about the management fee?

Your ad budget and the management fee are separate: ad spend is paid directly to Google. My Google Ads management starts at $750 a month, flat, with no contracts, and you own your account (details on the pricing page; market rates in how much a Google Ads consultant costs). Below $1,500–$2,000 a month in ad spend, the fee becomes a large share of the total, which is another reason for that recommendation. If you’re weighing who to hire, see Google Ads freelancers vs agencies, or browse the case studies.

FAQ

How much should a small business spend on Google Ads?

For most local lead generation businesses, I recommend starting at $1,500–$2,000 a month in ad spend. A better approach is to calculate it: divide your expected CPC by your expected conversion rate to get cost per lead, then multiply by the number of leads you need each month.

What is the minimum Google Ads budget?

Google doesn’t set a minimum. The practical minimum is the amount that gets you enough conversions to learn from. If your budget only buys a handful of leads a month, narrow the campaign to your best service and area rather than spreading it thin.

Is $500 a month enough for Google Ads?

It can work in a low-CPC market with a narrow focus. In industries where clicks cost $8–$10, $500 buys only 50–60 clicks a month, which usually isn’t enough to judge what’s working.

How long before I know if my budget is working?

Plan on the first 30 days being mostly learning and testing, with clearer results in months two and three. Judge on cost per lead and lead quality over at least a month, not on the first week.

Want help working out the right budget for your business? Book a free call with me.