How Much Should You Spend on Google Ads Per Month?

The short answer

There is no honest one-size number. Anyone who tells you “spend $1,000 a month” without asking about your margins, your market and your website is guessing. What you can do is work backwards from what a new customer is worth to you, then set a budget that is big enough to produce a fair test.

The rest of this guide shows that method, explains how Google really limits your spend, and lists the mistakes that waste budget in the first month.

Work out your budget backwards, from the customer

Start with the outcome, not the ad spend. You need four numbers from your own business.

1. What a new customer is worth. Use profit, not revenue. If a job brings in 2,000 but leaves 600 after costs, your number is 600.
2. Your close rate. Of 10 enquiries, how many become paying customers? If you do not know, look at the last 20 enquiries.
3. The most you can pay for one enquiry. Multiply profit per customer by your close rate. This is your break-even cost per lead.
4. How many customers you want a month. This sets the number of enquiries you need.

Here is an illustration with made-up round numbers, only to show the arithmetic. Say a customer is worth 600 in profit and you close 1 in 5 enquiries. Your break-even cost per lead is 120. If you want 5 new customers a month you need about 25 enquiries. If each enquiry costs 60 in ad spend, that is a 1,500 monthly budget. If it costs 120, the same goal needs 3,000 and you are only breaking even.

The cost per enquiry in the example is not a benchmark. Your real cost depends on your industry, location, competitors, keywords, ads and landing page. The first weeks of data tell you what it really is.

Next step: write down your profit per customer and close rate today. Without them, any budget is a guess.

How Google actually limits your spend

In Google Ads you set an average daily budget for each campaign. According to Google’s help pages, the campaign can spend more than that on a busy day because traffic changes from day to day, but it will never spend more than 2 times the daily budget on a single day.

Over a billing period, Google says you are never charged more than 30.4 times your average daily budget, where 30.4 is the average number of days in a month. A daily budget of 10 therefore caps a billing period at 304. If overdelivery pushes costs past that, you are charged only up to the cap.

There is no separate “monthly budget” box in a standard campaign. Your monthly ceiling comes from the daily number. To plan a monthly figure, divide it by 30.4 to get the daily budget.

Google also shows recommended budgets for campaigns that keep hitting their budget. The recommendation is based on recent performance, typically the past 15 days. Treat it as a prompt to review the campaign, not an order. Google earns more when you spend more, so check that extra spend is bringing leads you want.

Can you run Google Ads on a small budget?

Yes, but a small budget needs a narrow focus. If the budget covers only a handful of clicks a day, you cannot afford broad keywords, many campaigns or a wide location. Pick your one most profitable service, the area you can actually serve, and the searches that show clear buying intent.

A tiny budget also slows learning. With few clicks, you see very few enquiries, so it takes longer to tell a good keyword from a bad one. Smart Bidding strategies generally work better when they have conversion data to learn from, so check Google’s current guidance for the strategy you choose before relying on it with very little data.

If your realistic budget is too low to fund even a basic test in your market, it is better to say so than to spread it thin. Fix the website or build organic visibility first, then add paid search when you can fund a proper test. Our guide on Google Ads vs Facebook Ads for small businesses helps you decide where to start.

What pushes the right budget up or down

• Competition in your market. Crowded, high-value services such as legal, finance or software tend to cost more per click than low-competition local services. Check your own search results and the Keyword Planner estimates for your terms.
• Location. Targeting a whole country is different from targeting one city. A wider area gives more searches but also more waste if you can only serve part of it.
• Your landing page. If 2 in 100 visitors enquire instead of 5 in 100, you pay 2.5 times more per lead for the same clicks. Fixing the page is often cheaper than raising the budget.
• Your sales cycle. B2B services that take months to close need more patience and a budget you can sustain, not one you cut after three weeks.
• Tracking. If you cannot see which clicks led to calls, forms or sales, you cannot tell whether the budget is working.

A sensible way to roll out your first months

1. Set up tracking first. Form submissions, calls and chats should all be counted before you spend a pound, dollar or euro.
2. Start with one or two focused campaigns. Choose your best service and location. Add more only after the first campaign is stable.
3. Fix a test budget and leave it alone for several weeks. Constant changes reset your learning and hide what works.
4. Review lead quality, not just lead count. Ask your team which enquiries were real.
5. Raise the budget only when the numbers support it. If cost per lead is below your break-even figure and the campaign is limited by budget, an increase is justified. If it is above, fix the ads, keywords or page first.

If a campaign is not spending at all, that is a different problem. See why your Google Ads campaign is not spending.

Budget mistakes that waste the first month

• Splitting a small budget across many campaigns. Each one gets too few clicks to learn anything.
• Judging success by clicks or impressions. Those are inputs. Leads and sales are the outcome.
• Cutting the budget after a bad week. A single week, especially with a small number of clicks, can be noise.
• Ignoring the fees on top. Ad spend goes to Google. Management, landing pages and creative are separate costs, and they decide how efficiently the spend works.
• Accepting every automated recommendation. Some suggestions help. Others mainly raise spend. Judge each one against your cost per lead. Newer features such as Promotion Mode also need a budget plan before you switch them on.

What does it cost to have someone manage it?

Agencies price in different ways, so treat any quote you receive as something to compare line by line. The things to separate are the management fee, the ad spend that goes to Google, one-off setup, landing page work and any third-party tools. A fair proposal lists the deliverables, the reporting you will receive and what is excluded. Nobody can honestly guarantee results from a budget, because competition, your website and your sales process all affect them.

At Maq Digital Media we quote after a free audit of the account and the website, so the budget recommendation comes from your numbers rather than a generic package.

Sources

• Google Ads Help: Choose your bid and budget
• Google Ads Help: Set and change an average daily budget for your campaign

The help pages show no last-updated date. Both were checked on 8 November 2026.

Frequently asked questions

Where we can help

Want a budget recommendation built from your numbers? We review your account and website first.

Written by the MAQ Digital Media team. Platform features, policies and interfaces change often, so check each platform’s current help documentation before acting on any step. Last reviewed 9 November 2026.