Before accepting a large order, ask how much cash the business must put in before the customer pays. A healthy margin can justify the work while an unfavourable payment schedule makes it difficult to fund.
Assess three things together: what the order contributes, the largest cash gap before collection, and what happens if payment arrives late. This turns growth planning into a decision about terms and capacity as well as sales.
Begin with what each sale contributes
Subtract the costs that increase with each unit or job from its selling price. The remainder is contribution: the amount available to cover fixed costs and, eventually, profit.
For a simplified, single-product business:
Contribution per unit = selling price per unit − variable cost per unit
Break-even units = fixed costs for the period ÷ contribution per unit
The U.S. Small Business Administration's break-even calculator uses this approach. It is useful when price, unit cost, and fixed costs are reasonably stable within the range being considered. Round up if only whole units can be sold. If contribution is zero or negative, additional volume does not cover fixed costs under those assumptions.
With several products, changing sales mix, capacity limits, or step changes in costs, use a more detailed model. A single average margin can conceal an unprofitable line of work.
Add the calendar the margin calculation leaves out
Now place each receipt and payment on its expected date. Include supplier deposits, delivery costs, customer acceptance, invoice processing, and the customer's actual collection pattern.
Money spent on stock or delivery may leave long before revenue is collected. A signed order does not remove that gap. A deposit helps only if it is received when needed and can be used under the agreement and applicable rules.
The profit-versus-cash guide explains the broader distinction. Here, the question is specific: what additional cash must this opportunity borrow from the rest of the business?
Worked example: the order needs $15,000 before it earns $10,000
Fictional Cedar Lane Services is evaluating an order for 100 identical service packages. All amounts are illustrative dollars in one currency; taxes, financing costs, and unrelated business movements are excluded to isolate the order.
Each package sells for $300 and has $180 of variable cost. The order also requires a one-off $2,000 setup cost. Existing fixed overhead is unchanged and already covered in the base business forecast.
At 100 packages, revenue is $30,000. Variable costs total $18,000. After the additional setup cost, the order contributes $10,000 toward the business's existing overhead and profit. Its incremental setup-cost break-even is 17 packages: $2,000 ÷ $120, rounded up. That is not the break-even point for the entire business.
The proposed cash schedule looks like this:
| Week | Order receipts | Order payments | Cumulative order cash |
|---|---|---|---|
| 1 | $5,000 customer deposit | $12,000 supplier deposit + $2,000 setup | ($9,000) |
| 2 | $0 | $0 | ($9,000) |
| 3 | $0 | $6,000 delivery balance | ($15,000) |
| 4–5 | $0 | $0 | ($15,000) |
| 6 | $25,000 customer balance | $0 | $10,000 |
The order ends with a $10,000 contribution but needs $15,000 of funding at its lowest point. Define that requirement as the largest negative cumulative cash balance attributable to the order, before any new financing.
Assume the base business has $52,000 of projected closing cash in week 3 and a $40,000 minimum threshold. Adding the order reduces that week's balance to $37,000. The order creates a $3,000 threshold breach even though its margin is attractive.
Change the terms before changing the ambition
Suppose the customer agrees to a $10,000 deposit instead of $5,000, received before the week 1 payments. The final balance becomes $20,000. Total price and contribution remain unchanged.
The revised cumulative cash position is −$4,000 after week 1 and −$10,000 after week 3. The peak funding need falls by $5,000, and the combined week 3 cash balance rises to $42,000.
That clears the illustrative threshold in week 3. It does not establish that every other week is safe. Recalculate the full business forecast, including existing commitments, before proceeding.
Other options might include milestone billing, smaller delivery batches, or a supplier schedule agreed before ordering. Compare any discounts, fees, lost sales, or operational consequences. Improving payment timing is useful only if the revised commercial arrangement still makes sense.
Stress-test the vulnerable assumption
If the final customer payment moves from week 6 to week 8, the order's funding gap lasts two weeks longer. Its depth may stay the same in the isolated schedule, but the combined business could face payroll or tax payments during that extension.
Test the delay against the actual cash calendar. Also consider a cost overrun, partial acceptance, or a smaller order where relevant. Keep the adverse case plausible and explain which assumption changed.
Do not simply add an optimistic sales pipeline to cover the gap. A funding source needs its own credible availability date and costs.
Turn the result into an approval condition
A useful decision might read: “Proceed once the $10,000 deposit clears, the delivery scope is confirmed, and the revised weekly forecast remains above our threshold.” That tells the team what evidence is needed before committing money.
If the threshold cannot be protected, compare a smaller first order, a different schedule, or an appropriate financing arrangement. Consider the cost of saying no as well, but make the cash exposure visible rather than leaving it implicit.
CashCatalyst's dated expected items and 13-week forecast can help place agreed collections beside planned payments. Its delay scenario can test the effect of a late expected receipt. Maintain the detailed margin and order schedule alongside that view and reconcile overlaps with any historical spending assumptions. The forecast methodology explains the current calculation.
This week, choose one promising opportunity and draw its receipt-and-payment timeline. Find the deepest cash gap before discussing the final projected profit.
Frequently asked questions
Does reaching break-even mean cash risk has gone away?
No. Break-even describes a cost-and-revenue relationship under stated assumptions. Collection timing, existing obligations, and financing payments can still create a shortfall.
Is a larger customer deposit always the answer?
No. Consider customer acceptance, refund obligations, delivery risk, and any restrictions on using the money. Test feasible terms rather than assuming the customer will finance the whole job.
Sources and editorial note
The contribution calculation follows the SBA's break-even framework. The order timeline and decision examples are original illustrations. They are simplified planning tools; include taxes, financing costs, and contractual requirements when evaluating an actual order.