Two gyms. Same city. Same €1,000 a month in ads.
The first one books 12 trials, closes 4 members, and the owner is convinced ads don't work. The second books 50 trials, closes 30 members, and is opening a second location.
Same budget. Same platform. Wildly different outcome.
So when a gym owner asks us "how much should I spend on ads?" — the honest answer is: that's the wrong first question. The budget isn't the lever. The math behind the budget is.
Let's build it.
How much should a gym actually spend on ads in 2026?
Most local gyms need €600 to €1,500 a month in ad spend to keep a trial calendar full. But that range is an output, not a guess. You get to it by working backward from one number: how many new members you want.
Here's why a flat figure fails. "Spend €500" means nothing if you don't know what €500 buys. In one market it books 25 trials. In another, 10. The dollar amount is meaningless until you tie it to a member goal and a close rate.
So forget "what should I spend." Ask "how many members do I want, and what does each one cost to get?" The budget falls out of the answer.
What's the real math behind a gym ad budget?
Four numbers. That's the whole model.
- Member goal — how many new members you want this month.
- Trial-to-member close rate — what percent of booked trials become members. 60% is a strong benchmark.
- Cost per booked trial — €15-25 for most gyms running paid social.
- Member value — what a member is worth over their life with you. €600+ is common at €40-60/month.
Now run it. Say you want 18 new members.
- 18 members ÷ 0.60 close rate = 30 trials needed
- 30 trials × €20 per booked trial = €600 in ad spend
Want 36 members? Roughly €1,200. Want to fill a brand-new location fast? €1,500+. The budget scales with the goal, cleanly, because every step is a real number you can measure.
And here's the kicker — those 18 members at €600 each are €10,800 in lifetime value, off €600 in ads. That's the shape of a system that works. It's the same math that took a wellness client of ours from €620 in spend to €44,000 in revenue. Different niche, identical engine: cheap front-end lead, strong close, high lifetime value.
What's a good cost per lead for a gym?
A healthy gym cost per lead is €8-12 for a basic lead and €15-25 for a booked trial — a lead who actually picks a time on your calendar.
Watch the second number, not the first. A €4 lead who never shows up is more expensive than a €20 trial who walks through the door. Cheap raw leads are a trap. We've seen gyms brag about €3 leads and close two members a month, because those leads filled a form on a meme and forgot they ever did.
| Metric | Healthy 2026 range | What it tells you | |---|---|---| | Cost per lead | €8-12 | Top of funnel — cheap, noisy | | Cost per booked trial | €15-25 | The number that predicts members | | Trial-to-member close | 60%+ | Whether your front desk works | | Cost per member | €30-50 | The only number that pays rent | | Member lifetime value | €600+ | Whether the whole thing is profitable |
The metric that pays your rent is cost per member. Everything above it is just plumbing.
Why does spending too little cost you more?
Because paid platforms run on data, and a starved budget never feeds them enough.
Below roughly €500 a month, the algorithm on Meta, Google, or any paid channel can't find your pattern of good leads. It doesn't get enough conversions to learn who your buyers are, so it keeps guessing — and guessing is expensive. Your cost per result stays high and bounces around week to week.
This is the part that feels backward to a careful owner. Spending a little more, steadily, often produces a lower cost per member than spending a little. You're not just buying clicks. You're buying the algorithm's education. Starve it and it stays dumb.
If you're stuck under that threshold and your numbers are all over the place, that's worth a second pair of eyes — we'll pull your numbers in a free audit and tell you whether you're underfeeding the algorithm or something else is leaking.
What if the ads work but trials don't convert?
Then your problem isn't the budget. It's the 90 seconds after the lead comes in.
A gym that converts 60% of trials into members is twice the business of one converting 30% — on the identical ad spend. Read that again. You can double your members this month without spending one extra euro, just by fixing what happens after the form gets filled.
The usual leaks:
- Slow follow-up. A lead that books at 9pm and hears from you at noon the next day is half-cold. Speed is the cheapest win in the building.
- No-show trials with no reminder system. A booked trial isn't a member. Texts and reminders the day before are the difference between 40% and 70% show-up.
- A trial that's just a tour. Walking someone past the squat racks isn't a trial. Putting them through a session they feel in their body the next day is.
- An intro offer priced wrong. Your trial or intro should sit around 60-70% of your full membership price — high enough to attract committed people, low enough to say yes to.
We look at this before we touch ad spend. Pouring more budget into a 30% close rate is just buying more leaks.
So what's the minimum to start?
If you want a single starting number: €600-800 a month, three or more creatives in rotation, optimized for booked trials, with a same-day follow-up system behind it. That's the floor that gives the algorithm enough data and gives you enough trials to learn from.
From there you scale by your member goal, not your nerves. Every €600 should book ~30 trials and close ~18 members. When that ratio holds, adding budget is just adding members at a known price. When it doesn't, you fix the leak before you add a euro.
The 30-Second Audit
Three honest questions:
- Do you know your cost per member — not per lead, per member? If not, you're flying blind on the only number that pays rent.
- Do 60% of your booked trials become members? If you're under 40%, your budget isn't the problem. Your follow-up is.
- Are you spending enough for the algorithm to learn? Under €500/month, your cost per result will stay high and jumpy no matter how good the ad is.
If any answer was no, book a free audit. We'll run your real numbers and tell you the exact budget to fill your calendar — even if you never work with us.
Budget by your member goal, not your fear. The math doesn't lie. Your gut does.