Model your CrossFit box's real monthly profit across membership dues, drop-ins, and retail — with churn, payroll, and overhead fully loaded.
120 members times $150 a month reads like $18,000, and that's the number that gets you to sign the bigger lease. Then 5% of them quietly cancel every month, the rent is due whether 12 people show up to the 5am or 2 do, and your head coach wants the raise you promised. The spreadsheet headline and the bank balance are two different animals. This calculator takes active members, membership fee, drop-ins, retail, churn, rent, payroll, and overhead, and returns monthly revenue by stream, net profit, and margin — the number that survives contact with month-end.
The model runs on six revenue and retention inputs — Active Members, Monthly Membership Fee, Drop-In Visits, Drop-In Rate, Monthly Retail Revenue, and Monthly Churn Rate — with rent, instructor payroll, and overhead on the cost side. What's left is net profit per month: the number that actually decides whether you can afford a second coach, replace the rowers, or expand into the unit next door.
Churn: the silent revenue drain that membership count hides
Monthly Churn Rate is the percentage of members who cancel each month. At 5% churn on 120 members, you lose 6 members per month. To hold the same count, you need at least 6 new memberships per month — every month. At $150/month average fee, that 5% churn represents $10,800 in annualized revenue at risk that has to be continuously replaced.
The calculator applies churn to model your effective revenue baseline rather than your nominal membership count. A box with 120 members and 8% churn generates meaningfully less reliable revenue than one with 90 members and 3% churn, even though the higher-count box looks stronger on paper. Reducing churn by two percentage points on a 100-member box saves roughly 2 memberships per month — $300–$450 in monthly revenue without any acquisition spend.
Drop-in revenue: the supplement that matters more than most owners track
Drop-In Visits Per Month times Drop-In Rate is a revenue stream that many boxes treat as incidental but that can represent a meaningful share of monthly gross. At $25 per drop-in and 40 visits per month, that is $1,000 — roughly the equivalent of 6–7 monthly members at standard rates. For a box in a tourist area or near a corporate hotel district, drop-in volume can spike seasonally.
The drop-in revenue enters the model as a flat monthly estimate. If your drop-in traffic is highly seasonal, run the model twice — once with your off-season average and once with your peak average. The gap tells you how much revenue volatility you are managing and whether a solid member base needs to be large enough to cover fixed costs independently of drop-in contribution.
Retail revenue and its contribution to margin
Monthly Retail Revenue captures merchandise, supplements, apparel, and any equipment sales through the box. Retail typically carries better gross margins than services because the cost of goods is fixed — a $40 branded hoodie at 50% margin contributes $20 to gross profit regardless of whether it takes 2 minutes or 20 minutes to sell. Most boxes underinvest in retail because it feels secondary to the coaching product.
Enter your actual monthly retail figure. For most small boxes it is $200–$800. For boxes with active apparel drops or supplement programs, it can reach $1,500–$3,000. The contribution to net profit per dollar is usually higher than memberships on a percentage basis, which is why growing retail is one of the most margin-efficient strategies available without adding overhead.
Payroll and rent: the two costs that define a box's viability
Monthly Instructor/Staff Payroll is the largest variable expense for most boxes. A head coach plus a part-time assistant and front desk coverage can run $6,000–$12,000 per month depending on hours and market rates. The calculator takes this as a flat monthly input, which means it does not scale with class count — a feature that accurately reflects how most box payrolls are structured.
Monthly Rent is the other defining cost. CrossFit boxes require large square footage — typically 2,500–5,000 square feet — and industrial space in most markets is expensive. A box paying $4,500/month in rent and $8,000 in payroll has $12,500 in fixed costs before overhead and marketing. At $150 per member, that requires 84 members just to cover payroll and rent, before the owner earns a dollar.
Net profit and what a healthy CrossFit box margin looks like
A well-run CrossFit box typically targets 15–25% net margin after the owner draws a real salary from the payroll line. Below 10% and the business is fragile — one bad membership month or a major equipment failure can push the month to a loss. Above 25% is achievable but usually requires either a favorable rent situation, higher-than-average per-member rates, or a strong retail and drop-in contribution.
The most common margin problem in box economics is not a pricing issue — $150/month memberships are competitive — it is a density problem. Not enough members per square foot of space. The calculator shows what net margin looks like at your current member count, then lets you increase active members to find the headcount where the business achieves target margin. That number is your growth target, expressed as a specific member count rather than a vague aspiration.
How to use it
- Enter Active Members — your current paying member count, not your all-time high or your goal.
- Enter Monthly Membership Fee as your average across all membership tiers.
- Enter Drop-In Visits Per Month and Drop-In Rate as separate fields to capture that revenue stream independently.
- Enter Monthly Retail Revenue from supplement, apparel, or equipment sales.
- Set Monthly Churn Rate — your actual cancellation percentage per month.
- Fill in Monthly Rent, Monthly Instructor/Staff Payroll, and Monthly Overhead, then read net profit and margin.
Who it's for
- Box owner evaluating a second coaching hire — Adds $2,800/month to the payroll line and 18 new members to see whether the hire is justified — finds that 18 members at $155/month exactly covers the additional payroll, making the hire break-even at that growth rate.
- Owner considering a rate increase from $145 to $165 — Raises membership fee by $20 and drops member count by 8% to model expected churn — finds net profit increases by $1,400 even after the member loss, confirming the rate increase is worth the risk.
- Investor evaluating a box acquisition — Enters the selling box's reported member count, fees, churn, and costs to verify the presented EBITDA against the model — finds the owner's salary is excluded from payroll, reducing actual net profit by $4,500/month.
- New box setting a membership target before lease signing — Enters projected rent and payroll for a new location to find that 75 members at $155/month is the minimum count for the business to cover fixed costs — which informs the go/no-go decision on the lease.
Key terms
- Monthly churn rate
- The percentage of active members who cancel their membership in a given month. At 5% churn, a 100-member box loses 5 members per month on average and must acquire 5 new ones to hold flat.
- Drop-in visit
- A single-class purchase by a non-member, typically at a premium rate ($20–$35) over the per-class equivalent of a monthly membership. A variable revenue source that supplements membership dues.
- Member density
- Active members per square foot of facility space. Higher density means fixed real estate costs are spread across more revenue-generating relationships, improving margin.
- Blended membership rate
- The average monthly fee across all membership tiers weighted by the proportion of members on each tier. More accurate than using a single full-price rate when multiple pricing tiers exist.
Frequently asked questions
Should I include a corporate or punch-card tier in the membership fee input?
Enter a blended average membership fee across all tiers — weight it by the approximate distribution of member types. If 70% of your members pay $155 and 30% pay $125 on a reduced plan, your blended average is around $146. Using the full-price tier overstates revenue.
What churn rate is normal for a CrossFit affiliate?
Monthly churn of 3–6% is typical for most boxes. Below 3% indicates strong retention — often correlated with community programming, personal coaching quality, or a strong member cohort. Above 7% is a retention problem that no amount of new member acquisition can permanently solve.
Should the owner's coaching salary be in the payroll field?
Yes. If you coach classes and do not include your own wage in payroll, the net profit is artificially inflated. Enter a market-rate amount for your hours — what you would pay a head coach to replace your role — and the model becomes an honest picture of the business's profitability independent of owner labor.
How do I model a kids programming or specialty course revenue?
Treat it as additional monthly revenue added to your Drop-In Rate or Retail Revenue field, or increase the effective Active Members count to include program participants at their fee. The key is that every revenue stream is in the model so the net profit calculation is complete.