Definitions are consistent, but the cases are not normalized to one city, staffing level, building or sales unit. Annual forecasts and monthly unit-economics sensitivities can use different fixed-cost assumptions.
Car Wash: scope, limitations and input evidence
Illustrative modeled scenario. We use the cited sources to define operating scope and cost categories, and label local ticket, throughput, roster, project budget, contribution and growth as authored assumptions. Screen the exact site for permitted access hours, drainage, wastewater acceptance and available utility capacity before committing to the equipment. Meter water and energy, record chemical use and time paid bay occupancy through ordinary and busy periods. EPA distinguishes self-service from automatic and conveyor formats; water-reclaim savings from those other formats do not establish savings here. Stop or reduce the opening commitment if site work, recurring tariffs, uptime or retained spend cannot support the fixed costs. The annual forecast and the operating calculator are separate scenarios: the annual path uses changing costs and the calculator holds its own fixed costs and contribution constant. A first positive operating month neither funds the opening ramp nor repays the opening investment. Local delivered bids, paid owner and employee hours, employer costs, supplier terms, collections, maintenance and a dated monthly cash plan determine the investment decision.
Opening allocation. The $650,000 opening allocation funds four self-service bays, site and utility work, payment systems, setup and a separate $65,000 operating reserve. The lower scope reuses sound bays and utilities; the upper scope replaces more equipment and site systems. Land and a conveyor tunnel are excluded. Confirm wastewater terms, installed capacity, utility charges and equipment condition; the reserve does not certify cash sufficiency through construction, bad weather or a prolonged fault.
Annual forecast. Year one uses 70% and Year two 91% of the Year-three sales case, with separate payroll and overhead schedules. Years four and five use 105% and 110% of Year-three sales, with separate expense increases. The annual schedule uses a rounded $480,000 Year-three sales case; the calculator uses the exact $12 spend, 110 site-wide washes and 4.33 weeks per month, equivalent to 51.96 weeks per year. The separate calculator applies its own linear monthly ramp and fixed-cost allowance; that allowance is lower than Year-three paid payroll and overhead. Test the full annual costs divided by twelve when assessing mature fixed commitments. Payroll stays payable when demand falls; operating earnings exclude financing, income tax, replacement capital, working-capital timing and distributions.
The evidence register explains the assumptions behind each budget, forecast and calculator input. “Assumption” means the amount was selected for the scenario; the linked reference does not independently establish that amount.
Assumption: Opening budget
The equipment guide sets the physical scope. All site allowances are planning budgets pending contractor quotes. Daily washes and average spend are capacity assumptions; fixed costs include staffed cover, rent, insurance and maintenance. Weather, water tariffs and equipment downtime can materially change results. The lower scenario reuses usable bays and utilities; the upper scenario replaces equipment and undertakes major site work. Land purchase and a conveyor tunnel are excluded.
- Total opening budget
- Lower opening budget
- Upper opening budget
- Bay equipment and water systems
- Site and utility improvements
- Working capital reserve
- Permits, design and deposits
- Payment systems and launch
[car-wash-guide][sba-startup]Assumption: Annual forecast
Authored annual sales, direct-cost, paid-owner/staff and overhead schedules. Year-one and Year-two revenue are 70% and 91% of the Year-three case; later sales growth is assumed. Source context does not verify local invoices, roster coverage, wages, utility bills, rent or safe capacity. Annual costs and cash timing require local records.
- Revenue (Years 1–5)
- Chemicals, water and variable power (Years 1–5)
- Paid owner and staff incl. employer costs (Years 1–5)
- Occupancy and other operating (Years 1–5)
[car-wash-guide][bls-cleaners][sba-startup]Assumption: Operating assumptions
Authored retained price, site- or route-wide completed units, selling days, contribution and linear monthly ramp. The calculator's fixed-cost allowance is a separate simplified scenario, lower than Year-three payroll plus overhead; test the complete annual commitment divided by twelve. Bounds are sensitivities and do not guarantee feasible hours, resources or local paid demand.
- Average wash spend (base scenario)
- Average wash spend (lower sensitivity)
- Average wash spend (upper sensitivity)
- Washes per day (base scenario)
- Washes per day (lower sensitivity)
- Washes per day (upper sensitivity)
- Trading days per week (base scenario)
- Trading days per week (lower sensitivity)
- Trading days per week (upper sensitivity)
- Monthly fixed operating costs
- Contribution margin
- Opening sales as a share of mature volume
- Monthly increase toward mature volume
- Forecast horizon (months)
[car-wash-guide][bls-cleaners][sba-startup]Laundromat: scope, limitations and input evidence
Illustrative modeled scenario. We use the cited sources to define operating scope and cost categories, and label local ticket, throughput, roster, project budget, contribution and growth as authored assumptions. Obtain the selected distributor's installed machine schedule and the landlord's utility obligations, then observe loads, wash and dry payments, peak queues, outages and metered bills at a comparable catchment. The $12 visit combines wash and dry revenue once; counting dryer sales again would overstate it. Part-time cover is not full-day supervision: record paid cleaning, opening, closing, cash handling, customer assistance, maintenance and owner time in the actual roster. The annual forecast and the operating calculator are separate scenarios: the annual path uses changing costs and the calculator holds its own fixed costs and contribution constant. A first positive operating month neither funds the opening ramp nor repays the opening investment. Local delivered bids, paid owner and employee hours, employer costs, supplier terms, collections, maintenance and a dated monthly cash plan determine the investment decision.
Opening allocation. The $420,000 allocation funds washers and dryers, coordinated utility and fit-out work, deposits, payments and furniture, launch and a separate $35,000 reserve. The lower scope reuses laundry infrastructure; the upper scope converts a larger unit with new equipment. Real estate is excluded. Connection fees, installation, ventilation, rent, utility tariffs and supplier timing need local quotes. A reserve line does not establish monthly funding for utility deposits, delays or major machine replacement.
Annual forecast. Year one uses 70% and Year two 91% of the Year-three sales case, with separate payroll and overhead schedules. Years four and five use 105% and 110% of Year-three sales, with separate expense increases. The annual sales bridge uses the 4.33-weeks-per-month convention, equivalent to 51.96 weeks, with whole-dollar rounding. The separate calculator applies its own linear monthly ramp and fixed-cost allowance; that allowance is lower than Year-three paid payroll and overhead. Test the full annual costs divided by twelve when assessing mature fixed commitments. Payroll stays payable when demand falls; operating earnings exclude financing, income tax, replacement capital, working-capital timing and distributions.
The evidence register explains the assumptions behind each budget, forecast and calculator input. “Assumption” means the amount was selected for the scenario; the linked reference does not independently establish that amount.
Assumption: Opening budget
The manufacturer guide informs equipment and permitting scope. It does not quote the equipment allowance used here. Visit spend bundles washing and drying; visits are not washer cycles. Utility costs and plumbing capacity require engineering and tariff checks. All financial inputs are modeled allowances pending distributor and lease quotations. The lower case refits an existing laundry with reusable infrastructure; the upper case converts a larger retail unit and installs new equipment. Real estate purchase is excluded.
- Total opening budget
- Lower opening budget
- Upper opening budget
- Commercial washers and dryers
- Plumbing, electrical and fit-out
- Working capital reserve
- Lease deposits and permits
- Payment system, furniture and launch
[laundry-guide][sba-startup]Assumption: Annual forecast
Authored annual sales, direct-cost, paid-owner/staff and overhead schedules. Year-one and Year-two revenue are 70% and 91% of the Year-three case; later sales growth is assumed. Source context does not verify local invoices, roster coverage, wages, utility bills, rent or safe capacity. Annual costs and cash timing require local records.
- Revenue (Years 1–5)
- Water, gas, power and supplies (Years 1–5)
- Paid owner and staff incl. employer costs (Years 1–5)
- Occupancy and other operating (Years 1–5)
[laundry-guide][bls-cleaners][sba-startup]Assumption: Operating assumptions
Authored retained price, site- or route-wide completed units, selling days, contribution and linear monthly ramp. The calculator's fixed-cost allowance is a separate simplified scenario, lower than Year-three payroll plus overhead; test the complete annual commitment divided by twelve. Bounds are sensitivities and do not guarantee feasible hours, resources or local paid demand.
- Average laundry visit spend (base scenario)
- Average laundry visit spend (lower sensitivity)
- Average laundry visit spend (upper sensitivity)
- Laundry visits per day (base scenario)
- Laundry visits per day (lower sensitivity)
- Laundry visits per day (upper sensitivity)
- Trading days per week (base scenario)
- Trading days per week (lower sensitivity)
- Trading days per week (upper sensitivity)
- Monthly fixed operating costs
- Contribution margin
- Opening sales as a share of mature volume
- Monthly increase toward mature volume
- Forecast horizon (months)
[laundry-guide][bls-cleaners][sba-startup]