Blog · Territory, capacity and quota planning · Finance and FP&A teams
Compare a special order with the business as usual alternative using only revenue and costs that change. A worked manufacturing example shows the profit effect, a freight variation and the checks before approval.
An example of incremental analysis compares the extra revenue from a business proposal with the costs that change if it proceeds. A special order adding $56,000 in sales and $46,000 in relevant costs adds $10,000 to operating profit. Costs that stay the same belong in the reconciliation, but contribute no difference to the decision.
Consider an illustrative Ohio manufacturer deciding whether to accept a one-time order during October. The alternatives are to continue its regular production without the order or accept the order alongside that production. Both cover the same month, and operations confirms sufficient unused capacity without delaying existing customers.
OpenStax's relevant-information guidance describes differential analysis as comparing the relevant revenue and costs of alternatives. A cost matters here when it changes between those alternatives. A past expenditure cannot change, while a new fixed setup charge can.
This is a managerial decision comparison. For an experiment using treatment and holdout groups, use incrementality analysis; that asks a different question about measured outcomes.
The sales workbook contains the requested quantity and offered price. Purchasing supplies material costs, operations supplies labor and packaging requirements, and a carrier quote supplies freight. The controller confirms that the existing fixed operating costs remain unchanged.
| Supplied assumption | Value | Basis |
|---|---|---|
| Order quantity | 2,000 | Units requested |
| Selling price (USD per unit) | 28 | Customer offer |
| Materials (USD per unit) | 10 | Purchase requirements |
| Additional labor (USD per unit) | 6 | Labor needed for this order |
| Packaging (USD per unit) | 2 | Order specification |
| Setup cost (USD) | 6,000 | Required only if accepted |
| Freight cost (USD) | 4,000 | Required only if accepted |
The labor assumption is consequential: it represents additional paid labor, not an allocation of salaries already committed under either choice. Likewise, materials use the cost of satisfying this order rather than an unrelated historic average. Attach an assumption date and an owner so a later purchase quote does not silently replace the approved case.
Incremental operating profit = Additional revenue - Additional variable costs - Other costs caused by the decision
All amounts below are exact USD, with no rounding. The cost rows are deductions from revenue.
| Step | Calculation | Amount (USD) |
|---|---|---|
| Additional revenue | 2,000 × 28 | 56,000 |
| Materials | 2,000 × 10 | 20,000 |
| Additional labor | 2,000 × 6 | 12,000 |
| Packaging | 2,000 × 2 | 4,000 |
| Additional variable costs | 20,000 + 12,000 + 4,000 | 36,000 |
| Setup | Supplied assumption | 6,000 |
| Freight | Supplied assumption | 4,000 |
| Total relevant costs | 36,000 + 6,000 + 4,000 | 46,000 |
| Incremental operating profit | 56,000 - 46,000 | 10,000 |
The special order covers its additional costs and adds $10,000 under these assumptions. Its break-even price is $46,000 / 2,000 = $23 per unit. That is a decision threshold for this specific order and capacity situation; it does not establish a sustainable price for the entire business.
For the related percentage measure, see incremental margin. Keep the dollar result visible because it is the amount available to improve the month's operating profit.
The regular business produces the revenue and variable costs shown below. Existing fixed operating costs are $24,000 under either alternative. This table includes those costs to prove that excluding them from the difference loses no profit.
| Monthly line | Reject order (USD) | Accept order (USD) | Change (USD) |
|---|---|---|---|
| Revenue | 240,000 | 296,000 | 56,000 |
| Variable costs | 156,000 | 192,000 | 36,000 |
| Special setup | 0 | 6,000 | 6,000 |
| Special freight | 0 | 4,000 | 4,000 |
| Existing fixed operating costs | 24,000 | 24,000 | 0 |
| Operating profit | 60,000 | 70,000 | 10,000 |
The check is $70,000 - $60,000 = $10,000, equal to the standalone incremental result. Charging the existing $24,000 again against that result would incorrectly turn it into a $14,000 loss, even though the cost remains when the order is rejected.
OpenStax's special-order discussion emphasizes the capacity condition: additional fixed costs or displaced regular sales can change the decision. Confirm that condition with operations before approving the comparison.
Suppose the carrier revises only the freight quote from $4,000 to $16,000. Quantity, price, production costs, setup and ordinary business remain unchanged.
| Result | Original freight (USD) | Revised freight (USD) |
|---|---|---|
| Additional revenue | 56,000 | 56,000 |
| Additional variable costs | 36,000 | 36,000 |
| Setup | 6,000 | 6,000 |
| Freight | 4,000 | 16,000 |
| Incremental operating profit | 10,000 | -2,000 |
The revised result is $56,000 - $36,000 - $6,000 - $16,000 = -$2,000. Whole-business operating profit becomes $58,000, below the $60,000 rejection alternative. The changed quote reverses the financial recommendation without any change to existing fixed costs.
Bring a workbook containing the alternatives, sales assumptions and cost rows; Covirage maps the columns and its tools compute and check the differences. The external AI model explains the result with every figure traced to its rows. Create a free Covirage account and bring a sample of your own data; creating the account takes about a minute.
See Covirage for finance teams for the business context.
Include a fixed cost when the decision changes it, such as a temporary supervisor hired only for the order. Exclude an existing lease or salary that remains under both alternatives. The relevant distinction is whether the amount changes, rather than its accounting label.
A sunk cost has already occurred and cannot be changed by the current choice. Recording it again can distort the comparison. Future consequences of an earlier purchase, such as a disposal receipt or an avoidable maintenance payment, still belong when they differ between alternatives.
It supports acceptance under the stated assumptions, but managers must also check capacity, customer commitments, credit risk and price effects on existing business. A profitable order can still be unsuitable if it displaces a better order or breaches a service obligation.
No. Incremental analysis compares relevant revenue and costs between business alternatives. Marketing incrementality analysis compares outcomes for assigned treatment and holdout groups. A cost comparison does not establish that a marketing campaign caused additional sales.