How much to spend on Google Ads when you're just starting out

Ask ten agencies how much you should spend on Google Ads and you’ll get ten different answers — almost all of them vague. “It depends.” “Somewhere between 500 and 2,000 euros.” “Enough for the algorithm to learn.”

The truth is nobody tells you what actually matters, because the honest answer doesn’t sell services.

This article does the opposite. It gives you a concrete way to set your first budget using numbers that already exist in your business — no guesswork, no recycled “best practices”.

You’re asking the wrong question

“How much should I spend?” assumes there’s a magic number waiting to be found.

There isn’t. Spending €500 might be too little for one business and reckless for another. It depends on what you sell, your margins, and how long you can survive without results.

The better question is: “How much can I afford to lose while I figure this out?”

The first months on Google Ads are always a learning phase. Even a seasoned agency needs 4 to 8 weeks to discover which keywords pull, which pages convert, which audiences respond. On your own, that window is longer.

If you treat the budget as tuition — not as an investment with guaranteed returns in 30 days — you’re already ahead of 80% of people who try paid ads.

The 3 numbers you need before touching Google Ads

Before picking a budget, you need to know how much each customer is worth to you. Without that, any number is a guess.

1. Average sale value

How much does a new customer pay you on their first purchase? If you sell a mix of products at different price points, use the average from the last 3 months.

2. Gross margin

How much is left from the sale after direct costs? Services tend to run high (70-90%). Physical products sit tighter (30-50%). Use your actual number, not an industry benchmark.

3. Customer lifetime

How many times does a typical customer come back? If you don’t know, assume once — the math stays conservative, which is exactly where you want to start.

The simple formula

With those three numbers, you can land on a starting budget that holds up:

Initial monthly budget = 10 to 15 x the gross margin of 1 new customer

You’re betting that one month of spend can bring in 10 to 15 customers — enough for the data to show clear signals.

A real-world example

An online cosmetics shop. Average sale: €45. Gross margin: 40% (€18 per sale). Customers return about 1.5 times a year (€27 total margin per customer).

Suggested starting budget: €270 to €400/month.

At that level, the shop needs 10 to 15 new customers for the spend to break even. If after 2 months the numbers aren’t close, something is off — keywords, landing page, or pricing. If they hit and exceed the target, it’s time to scale.

The same logic scales to any ticket size. The higher the margin per customer, the larger the sustainable budget — and the fewer customers you need to justify the spend.

The mistakes that will drain your budget

Three mistakes that catch almost everyone:

• Spending “to test” without knowing what you’re testing. “I’ll throw €20/day at it and see what happens” is not a strategy. Pick your keywords, landing page, and goal before you launch.
• Burning through the budget in month one and quitting. The algorithm needs time to learn who responds. Pulling the plug after 3 weeks is like yanking a cake from the oven halfway through.
• Fixating on CPC and ignoring conversions. A €0.40 click that never buys is more expensive than a €1.20 click that does. What matters is cost per acquired customer — and that only appears when you have conversion tracking set up properly.

Signals to scale up or pull back

After 6 to 8 weeks, you’ll have data. That’s when you decide:

Green signals: cost per customer sits below your gross margin, 2 to 3 keywords are driving real buyers, paid traffic converts on par with organic.

Red signals: plenty of clicks but zero conversions, cost per customer exceeds margin, you can’t trace where customers are coming from.

Pausing a campaign isn’t failure. It’s data. Coming back three months later with sharper targeting is the smart play.

What comes next

Google Ads rewards persistence backed by method. The first 3 months are the most expensive and the most confusing. From month 4 on, if you’ve done the groundwork, patterns emerge: winning keywords, peak hours, pages that close. That’s the moment the budget shifts from tuition to investment.

The hardest part is tracking these signals over time without losing the thread. Raveki does that for you — it monitors your CPC, conversions and ROAS automatically, and alerts you when something changes. But even without any tool, the three numbers we listed are your starting point.

Before you open Google Ads this week, write down the three numbers we covered — average sale value, gross margin, customer lifetime. Run the formula. Only then log in.

It’s the most underrated step in paid marketing. And it’s the only one that separates learners from wasters.