Search for advice on ad budgets and you'll find a lot of confident numbers. Spend at least this much. Never go below that. Most of it is made up, and the people repeating it have no idea what a customer is worth to you.
We don't publish a minimum, because a minimum that ignores your business is just a number with a dollar sign in front of it. What we can give you is the arithmetic that produces a real one.
Start from what a customer is worth
Before you think about budget at all, you need one figure: what a new customer is actually worth to you over the time they stay.
Not what they pay the first time. What they're worth in total: repeat business, the things they buy alongside the main thing, the people they refer.
A business selling a modest one-off service and a business whose customers stay for years are not playing the same game. No shared "minimum spend" makes sense across both.
Then work backwards
The chain looks like this:
- Cost per click, what it costs to get one person onto your page.
- Conversion rate, how many of those people actually get in touch.
- Close rate, how many of those become customers.
Multiply those out and you get your cost per customer. Compare that to what a customer is worth, and you know whether the math works at all.
Here's the part people skip. At the start, you don't know any of those three numbers. Not really. You have industry averages, which are averages of businesses that aren't yours.
What the first 90 days are actually for
The first phase isn't mainly about profit. It's about replacing three guesses with three measurements.
That changes the budget question. You're not asking "what should I spend every month forever." You're asking: what does it cost to buy a trustworthy answer?
You need enough conversions for the platform's optimization to have something to learn from, and enough for you to draw a conclusion that isn't noise. A handful of leads tells you very little, because at that size luck and signal look identical.
So the learning budget is whatever it costs to get past that point at your own cost per conversion. That number falls out of your business, not out of a rule of thumb. Which is the whole argument here: the figure is yours, and anyone who hands you one without knowing your numbers is guessing.
Why the timeline matters
Most accounts see lead volume pick up in the first two to four weeks. That early movement is encouraging, but it isn't a verdict yet.
The real compounding happens between days 60 and 90. By then there's enough data to cut what isn't working and put more weight behind what is. Judging an account at three weeks is like tasting a stew ten minutes in. You'll learn something, just not the thing you want to know.
This is the single most common way ad budgets get wasted. Not overspending. Underspending for two months, panicking, switching everything off, and buying nothing but a learning phase you never got to use.
Spend less than you can afford to lose
One rule does hold everywhere: the testing phase should cost less than you can comfortably absorb if it teaches you the answer is no.
If a budget has to work or the business is in trouble, it's too much. That kind of pressure leads to switching things off at week three, which guarantees you pay the cost and skip the knowledge.
What we'd tell you
We ask for ninety days to start, then month to month, the same ninety days this whole piece is about, and the reason we ask for it. On the call we work out what a customer is worth to you, what clicks are likely to cost in your category, and what it would take to buy a real answer. Sometimes that number is comfortable. Sometimes it makes clear that paid ads aren't the priority yet.
What the budget buys differs by channel. Google spends it on clicks from people already searching. Meta spends part of it finding out which creative works.
Either way you leave knowing the number and the reasoning behind it. Book a call and we'll work through it with you.