Find the minimum active memberships needed for a cold plunge operation to cover fixed and member-driven costs. The calculator also shows contribution per member, current monthly profit or shortfall, and the revenue required at break-even.
The threshold is the smallest whole number of active memberships whose contribution covers fixed monthly costs.
Exclude sales tax collected for authorities. Include payment fees in variable cost when they scale with memberships.
At $129 per month with $24 variable cost, each member contributes $105. With $8,500 fixed cost, break-even is 81 members; 90 members produce an estimated $950 monthly operating profit.
No. It is a planning estimate based on the values you enter; actual outcomes can differ.
Zero is accepted only where it has a practical meaning. The calculator flags values that would make the calculation invalid.
Use the period requested by each field and convert your records consistently before entering them.
Recalculate whenever pricing, volume, performance, or operating assumptions change materially.
It assumes price and per-member cost stay constant and does not model capacity constraints or tier mix.
| Variable | Meaning |
|---|---|
| Contribution margin | Price minus variable cost |
| Break-even members | Fixed cost divided by contribution, rounded up |
| Current profit | Members × contribution minus fixed cost |
| Break-even revenue | Threshold members × price |