Separate retail and membership contribution
No account, identifying deal details or document upload required.
Two streams, with no duplicate retail revenue
Retail contribution per wash = realized retail price − variable retail cost. Membership contribution per paid account = realized monthly membership price − average included visits × variable cost per visit − other per-account variable cost. Unit contributions are rounded to cents before monthly totals. Counts of retail washes and paid accounts are whole numbers; average member visits can be fractional.
Monthly contribution = retail washes × retail contribution + paid accounts × membership contribution. Membership visits are included in the membership cost line and total visit count; they are excluded from retail wash revenue. Gross modeled revenue is retail price × retail washes plus membership price × paid accounts. This is a monthly scenario, not a cash-collection schedule or revenue-recognition opinion.
Operating break-even and the broader cash target
Operating contribution after fixed costs = total contribution − entered fixed operating costs. The broader cash target adds your debt payments and capital reserve allowance to fixed operating costs. The remaining balance after that target is a planning measure, not accounting net profit, free cash flow or taxable income. Taxes, owner draws and any omitted costs are not inferred.
Holding membership count unchanged, required retail washes = the remaining target after membership contribution divided by positive retail unit contribution, rounded up to a whole wash. Holding retail washes unchanged, solve the same way for required paid accounts using positive account contribution. These are two separate alternatives, not counts that must both be added together.
What zero and negative contribution mean
If the other stream already covers the target, the minimum required count for this stream is zero. This does not mean additional loss-making activity is harmless. When an uncovered gap remains and the selected stream contributes zero or a loss per unit, no positive count in that stream can close it under the entered assumptions. The tool displays that condition instead of dividing by zero or suggesting a negative wash count.
The per-day figure divides the monthly retail requirement by your entered operating days and rounds up for an even daily target. It is not proof that demand or physical capacity can support it. A one- and two-extra-visit comparison isolates membership utilization while holding prices, counts and all other costs unchanged.
Worked example: contribution before and after financing
Assume $15,000 fixed operating costs, $5,000 debt payments and a $1,000 reserve allowance: the monthly cash target is $21,000. At a $12 retail price and $3 variable cost, 1,000 retail washes contribute $9,000. Four hundred paid accounts at $30, with three included visits costing $2 each and $1 other account cost, contribute $9,200.
Total contribution is $18,200: $3,200 above fixed operating costs but $2,800 below the broader cash target. Holding memberships at 400 requires 1,312 retail washes in total, 312 above the example volume. Holding retail washes at 1,000 requires 522 paid accounts, 122 above the example count. With one extra included visit per member and everything else unchanged, the planning shortfall becomes $3,600. These are hypothetical inputs, not Indiana benchmarks.
Validate what changes when volume changes
Confirm costs that change with each wash, each paid account and each staffing or capacity step. The model assumes the entered fixed costs and unit economics hold across the tested volumes. Real staffing, equipment, price mix, refunds, payment failures and capacity constraints can change that relationship. Paid memberships are not the same as free, paused or failed-payment accounts.
Use the membership retention tool for cohort/count scenarios, the cash runway planner for payment timing and the acquisition worksheet to compare annual ownership and financing assumptions.
Source and method
Reviewed October 17, 2026. SBA business planning guidance describes single-product break-even as fixed cost divided by unit contribution. This tool’s two-stream method holds the other stream constant; its debt/reserve cash target and visit sensitivity are separately disclosed planning extensions.