Measuring the ROI of a fitness floor: formulas, benchmarks and a recalculable scenario
Most gym business plans fail not for lack of figures but because the assumptions behind them are never written down. Four formulas, ten indicators and one explicit ramp-up assumption are enough to build a payback calculation a lender can actually assess. This guide sets out the method, the cost breakdown and three fully recalculable scenarios, ramp-up included.
The four formulas
- Return on investment. ROI equals cumulative surplus minus investment, divided by investment, expressed as a percentage over a stated horizon, usually five or ten years. An ROI of 150 percent at ten years means the investment has been recovered and has returned one and a half times its value on top.
- Payback period. Investment divided by annual operating surplus. This only holds in steady state. On a new opening you have to accumulate surpluses year by year with the ramp-up applied, otherwise the real payback is understated by several months.
- Member lifetime value. Annual revenue per member divided by the annual attrition rate. A member paying 480 EUR a year in a business with 30 percent annual attrition stays 3.3 years on average and represents a lifetime value of 1,600 EUR.
- Acquisition cost and its ratio to lifetime value. Marketing budget divided by new members generated. A healthy ratio of lifetime value to acquisition cost is at least 3. Below that, the business does not fund its own growth.
The indicators to track from the project phase onwards
| Category | Indicator | Benchmark, mainstream club |
|---|---|---|
| Acquisition | New members per month | 10 to 30 depending on the phase of the business |
| Acquisition | Cost per acquisition | 60 to 120 EUR depending on the local market |
| Acquisition | Trial to subscription conversion | 30 to 50 percent |
| Retention | Monthly attrition rate | 2 to 5 percent |
| Retention | Average membership duration | 18 to 36 months |
| Revenue | Average revenue per member | 40 to 70 EUR per month |
| Revenue | Lifetime value | 1,000 to 2,500 EUR |
| Operations | Density per square metre | 1.5 to 3 members per usable m2 |
| Operations | Fixed costs as a share of revenue | 55 to 70 percent |
These are working orders of magnitude consolidated from our own projects and from the files we assess. They are not published market data or sector statistics. They frame a first hypothesis and should be replaced by your own measurements as soon as you have them. A business plan that reproduces sector averages without testing them against its own catchment area is not a business plan. Note also that a box or a coaching studio has far higher revenue per member and far fewer members, so these benchmarks do not transfer directly.
Breaking down the cost base
Initial investment splits into six lines. Equipment runs from roughly 80,000 to 300,000 EUR depending on size and positioning. Fit-out and building work run 200 to 800 EUR per square metre depending on the condition of the unit. Sports flooring varies with the zones treated and the reaction to fire requirement that applies. Changing rooms, showers and sanitary facilities are the line most often underestimated, at 30,000 to 100,000 EUR depending on scope. Furniture, signage and IT run 10,000 to 30,000 EUR. Formation costs and the commercial launch run 10,000 to 40,000 EUR.
Fixed costs cover rent and property charges, salaries and social contributions, fleet maintenance, professional liability and damage insurance, management software subscriptions and energy. On maintenance, budget 3 to 5 percent of fleet value per year for preventive work: lubrication, cable replacement, recalibration. That benchmark is worth holding to rather than under-providing.
One line is routinely confused with maintenance and should not be. Renewal is separate from preventive upkeep. Provide an annual partial fleet renewal budget to keep the facility attractive. It is what avoids the cliff effect, where the entire fleet reaches end of life in the same year.
Variable costs are acquisition cost multiplied by new members, consumables and cleaning products, and payment processing commissions.
The assumption that changes everything: ramp-up
This is where business plans and reality diverge. A club does not open at its target membership, it reaches it over eighteen to twenty-four months. Payback periods are almost always calculated on the steady state surplus, which shortens them artificially.
The assumption applied in every scenario below, and one you can change: year one at 50 percent of target surplus, year two at 80 percent, years three to ten at 100 percent. Over ten years that gives a cumulative equivalent to 9.3 full years, not 10. That assumption alone explains the gap between the payback calculated in steady state and the payback actually observed from opening. Write yours into your business plan. A lender who cannot find it will reasonably conclude the file is not built.
A worked scenario
| Line | Value | Basis |
|---|---|---|
| Initial investment | 600,000 EUR excluding VAT | Equipment 180k, works 250k, flooring 35k, changing rooms 80k, other 55k |
| Target membership | 800 members | 1.6 members per m2 on 500 m2, reached in 18 to 24 months |
| Revenue per member | 45 EUR per month | 540 EUR per year |
| Steady state annual revenue | 432,000 EUR | 800 times 540 EUR |
| Annual fixed costs | 270,000 EUR | Rent 100k, salaries 120k, maintenance 8k, other 42k, equal to 62.5 percent of revenue |
| Operating surplus | 162,000 EUR | Margin of 37.5 percent |
| Payback period | 4.4 years | From opening, ramp-up included. 3.7 years if calculated in steady state |
| ROI at ten years | About 151 percent | Cumulative 1,506,600 EUR, of which 906,600 EUR above the investment |
The gap between 3.7 and 4.4 years is not a rounding difference. It is eight months of cash, and it is entirely produced by the ramp-up assumption. A smaller cross training box at 180 m2 with an initial investment nearer 180,000 EUR follows the same method with a higher revenue per member and a much smaller membership base.
The most profitable lever is retention
Neither the subscription price nor the floor area is the strongest lever. Retention is. Moving the monthly attrition rate from 5 percent to 3.5 percent extends average membership duration from 20 to 28 months and raises lifetime value by 43 percent, without a single additional euro of investment. In equipment terms that argues for spending on fleet condition, floor quality, changing rooms and air handling rather than on headline machine count, because those are the items members leave over.
Frequently asked questions
What payback period should a fitness project target?
For a mainstream club with a substantial fit-out, four to six years from opening, with ramp-up included, is a defensible range. Anything under three years usually indicates that the ramp-up assumption has been omitted or that the fit-out has been under-costed.
How much should I provide for equipment maintenance?
Three to five percent of fleet value per year for preventive maintenance, plus a separate annual renewal provision. Cable driven machines carry a consumable line that plate loaded machines do not, so the mix on your floor changes the figure.
Does leasing change the calculation?
It changes the cash profile, not the economics. Equipment leasing and asset finance move the investment out of the initial outlay and into a fixed monthly cost, which improves the opening cash position and lengthens the total cost. Run the payback both ways: on purchase, to see the real return, and on the finance package, to see whether the monthly payment is covered by the operating surplus at year one levels, not steady state levels.
How do I use these benchmarks for a box or a studio?
Keep the formulas and the ramp-up method, replace the benchmarks. Revenue per member is far higher and membership far smaller in those formats, so density per square metre and average revenue both move substantially.
Have your equipment package costed
Light In Fitness has equipped more than 500 facilities from Tours, France, since 2013, and issues detailed quotations within 24 working hours. Stock items ship in five to ten working days, delivery covers France, Belgium, Switzerland and Luxembourg, and export is costed project by project. Steel structures carry a twenty year warranty, machine ranges two to five years, and stainless steel a lifetime warranty.
See our turnkey projects service and the commercial gym equipment guide, or request a quote with your floor area and target membership so the equipment line of your plan rests on real prices.
