Cash decision lab
Compare eight no-login browser simulations and learn why a profitable-looking operation can still run short of cash when inventory, payroll, fixed commitments, and investment happen at different times.
Break-even asks whether contribution can cover period costs. Cash runway asks whether the business has enough cash at every point before that result arrives. A sound decision checks both.
Read the whole cash system
Ending profit alone cannot show whether a business could pay each obligation on time. Cash can leave for ingredients, stock, wages, permits, rent, repairs, deposits, or equipment before customer receipts arrive. A useful analysis traces the sequence from starting cash to operating receipts and payments, then checks whether any low point creates a solvency risk.
Record starting cash, inventory already available, usable capacity, and unavoidable commitments before changing a decision.
Trace when stock, labor, maintenance, promotion, and other cash payments occur relative to completed sales.
Check whether completed sales produce enough contribution to cover recurring fixed costs and rebuild cash.
Compare the lowest cash point, ending cash, upcoming commitments, and a reasonable uncertainty buffer.
Choose by cash question
| Simulation | Cash-cycle pressure | Decision to isolate | Evidence to compare |
|---|---|---|---|
| Food Truck Strategy guide | Permits, prep, ingredients, staffing, and event receipts occur in a short cycle. | Change one prep or event commitment. | Starting cash, served orders, waste, daily profit, and ending cash. |
| Grocery Store Strategy guide | Cash is tied up across assortment, fresh stock, replenishment, and shrink. | Change one reorder or category-stock level. | Availability, stockouts, shrink, margin, profit, and cash. |
| Bookstore Strategy guide | Slow-moving titles consume cash before curation, events, and recommendations create sales. | Change one inventory or event choice. | Turnover, unmet demand, slow stock, margin, and ending cash. |
| Landscaping Strategy guide | Crews, fuel, maintenance, and equipment support routes whose value depends on density and season. | Change one crew, route, or equipment commitment. | Completed jobs, travel pressure, utilization, repair cost, profit, and cash. |
| Auto Repair Strategy guide | Parts, mechanic time, bay capacity, and equipment compete for working cash. | Change one parts, staffing, or maintenance decision. | Completed work, comeback cost, bay use, trust, profit, and cash. |
| Childcare Strategy guide | Qualified staffing and safe capacity create recurring commitments before enrollment can support them. | Change one room or staffing plan while respecting modeled ratios. | Enrollment, capacity, quality, payroll pressure, profit, and cash. |
| Restaurant Model comparison | Ingredients, labor, rent, marketing, and equipment must be funded through volatile guest demand. | Change one menu, staffing, or investment choice. | Covers, waste, contribution, satisfaction, monthly profit, and cash. |
| Motel Model comparison | Large fixed property and staffing costs continue even when rooms are empty. | Change one rate, channel, upkeep, or staffing decision. | Occupancy, ADR, RevPAR, reviews, fixed-cost coverage, and cash. |
Five comparable runs
Contribution per unit equals selling price minus variable cost per unit. Break-even units equal fixed costs divided by positive contribution per unit. A simple runway estimate divides available cash by average net cash used per period, but it is meaningful only when the timing and assumptions are stated. Never mix daily, weekly, and monthly figures without converting them.
Look for stock purchased ahead of sales, equipment spending, payment timing, debt or owner withdrawals, and commitments not represented by the profit total. Identify where the cash went before changing price or demand.
Growth may require more inventory, labor, fuel, rooms, or service capacity before receipts arrive. Compare incremental contribution with the cash needed to support each additional completed sale.
The reduction may have gone below a practical availability buffer. Test smaller steps, separate slow stock from high-demand items, and compare the cash released with lost contribution and customer effects.
That may be expected, not automatically harmful. Ask whether the business can survive the low point, whether demand can use the added capacity, how long recovery takes, and what happens in the stress run.
Use Food Truck. Compare one baseline with one inventory or event change. Students label each major inflow and outflow, then explain why ending cash and profit answer different questions.
Teams use the five-run method in different simulations. Each submits a cash timeline, break-even check, stress result, recommendation, and one condition that would trigger a stop.
Pair product inventory with a fixed-capacity service. Use the accounting lesson to reconcile profit and cash, then the risk lesson to define a reserve and stop rule.
Assess accurate units, controlled comparisons, classification, evidence, uncertainty, and responsible limits—not the largest simulated expansion. A cautious recommendation with a clear reserve can be stronger than the highest simulated return.
These simulations simplify cash timing and omit many real obligations. They are not forecasts or financial, accounting, tax, lending, investment, employment, licensing, safety, or legal advice. They cannot verify funding eligibility, solvency, collateral value, taxes, payment terms, insurance, refunds, chargebacks, depreciation, or local requirements.
For a real decision, use verified bank and accounting records, current supplier and customer terms, complete taxes and obligations, realistic downside cases, and qualified review. Do not misstate results to lenders or investors, conceal liabilities, promise guaranteed returns, or generate artificial traffic or sales evidence. Review the advertising and traffic policy and terms of use.
Start with a cash constraint, then use a related guide to isolate the operating cause instead of changing several controls at once.