Ask most small business owners what they spend on winning customers and they'll say almost nothing. Then they'll mention the discount they give first-timers, the thank-you they send whoever brought them, and the airtime that went on boosting a post. It adds up, and it's worth knowing what it buys.
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Cost per new customer = Everything you spent winning them ÷ New customers won
Spend 40,000 in a month and win 12 new customers, and each one cost you 3,333.
The hard part isn't the division. It's being honest about the top number — most of what a small business spends on winning customers doesn't look like spending.
Five things, and only two of them feel like marketing.
The obvious one. Easy to remember because you paid for it in a lump.
Also obvious, and usually a one-off that gets forgotten in the months after.
The trips to a new market, the delivery you made at a loss to win someone over, the journey to show samples.
If someone brings you business and you give them something for it, that is what you paid for that customer. It doesn't stop being a cost because it was given warmly.
This is the one almost everybody misses, and for many businesses it's the biggest of the five. A discount you give to win someone is money spent winning them, exactly like a flyer. The only difference is that a flyer leaves your pocket and a discount never enters it — and money you didn't collect is just as gone as money you paid out.
Add those five honestly and the number is usually several times what the owner would have guessed.
There's a temptation to divide your spending only by the customers you can trace back to it. Don't. If you spent 40,000 and won 12 new customers, the honest figure is 40,000 ÷ 12, whether nine of them came from a flyer or nine came because a neighbour mentioned you.
Two reasons. The first is that you usually can't tell — someone who saw your sign three weeks ago and came because a friend spoke well of you is both, and asking them won't settle it.
The second is that counting only traceable customers makes your cost look far worse than it is, and pushes you towards spending more to fix a problem you don't have.
If you want to judge one particular effort — a specific batch of flyers, a specific promotion — then count only the customers it brought, and treat that as a separate question from the cost of running your business.
A cost of 3,333 per customer is a bargain if a customer is worth 134,400 a year to you. It's ruinous if they're worth 2,000 and never come back.
So the figure only becomes useful when you set it beside two others.
Work out what a customer is worth with the customer value calculator. The comparison tells you whether the spending pays.
Open the customer value calculator →Divide what you spent per customer by what they're worth in a month. That's your payback: the point at which a new customer stops being an investment and starts being profit.
Under three months is comfortable. Up to a year is workable if your customers reliably stay longer than that. Beyond a year, you're betting on a relationship lasting long enough to justify the cost — which brings us to the thing most owners get wrong.
It's easy to feel good about a low cost per customer. It's the wrong thing to feel good about on its own.
If you spend 3,000 to win someone who comes twice and never returns, you didn't win a customer cheaply. You bought two visits at 1,500 each, which is a different and much worse transaction.
And the reverse is true too. Spending 30,000 on someone who stays four years is one of the better things you can do with 30,000.
So the number that decides whether your acquisition spending was worth it isn't the acquisition cost. It's retention. Which is also why, for most small businesses, effort spent keeping existing customers beats effort spent finding new ones — the ones you keep cost nothing to win again.
Many small businesses run this calculation and find a very low cost per customer — sometimes a return of twenty or fifty times what they spent.
That's usually real, not an error. Word of mouth does most of the work in a neighbourhood business, and word of mouth is free. Divide a small spend by everyone who walked in and the ratio looks spectacular.
The useful signal in that case isn't the headline number. It's which of the five lines is biggest. If discounts are three-quarters of your spending, you're buying customers with margin rather than with money, and that's worth knowing even when the ratio looks fine. If referral thanks dominate, you've found the cheapest channel most businesses have and it's worth protecting.
And if a low cost sits alongside customers who don't come back, the cost was never the problem.
Knowing what you spend to win someone is half the picture. The other half is whether you keep them — and how much of your income depends on the few who've stayed longest.
Not sure what to fix first? It measures how exposed you are to losing one big customer, alongside your profit, your cash, and how much the business depends on you. Free, about 10 minutes.
Take your free Business Health CheckReady to see what's working? Monyvo tracks new and returning customers as they come, so you can tell which effort actually brought them in rather than guessing at the end of the month. Free plan available.
Get the Monyvo appThis tells you the cost of a new customer; that one tells you the worth of a regular. Put them side by side: if the worth is comfortably higher than the cost, you can afford to win more. If it isn't, the answer isn't to spend more — it's to keep the customers you already have.
Open the customer value calculator →Both halves rest on your margin — the share of each sale you actually keep. Judging what a customer is worth, and therefore what they're worth winning, starts there. If you're not sure of your margin, work it out first.
Open the profit margin calculator →