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A product can earn money on each order and still leave its launch in the red. The photo shoot, setup work, and other fixed launch expenses need to be covered before the project pays for itself. A margin percentage alone does not tell a small-brand owner how many units that takes.
The break even point in units is fixed costs divided by the amount left from each unit after variable costs. Use a consistent time period, include the relevant costs, and round up to whole units. This worked example shows how to turn the result into a launch decision.
Start with the selling price and the costs that rise when one more unit is sold. For a simple ecommerce example, those might include the goods, packing, payment fees, and the shipping cost paid by the seller. Which items belong depends on the decision and the stated cost basis.
The amount left is the unit contribution toward fixed costs and profit. It is not automatically profit per order. Fixed expenses have not yet been covered. That distinction explains why a product can have an attractive order margin while the launch still needs more sales than the team expects to achieve.
The profit-margin explanation helps separate the cost bases. Use it to keep the names consistent. A break-even model should not use one definition of cost for the price decision and another, more flattering definition for the sales target.
| Part of the model | What the SBA formula uses | Meaning for this launch |
|---|---|---|
| Fixed costs | The cost amount to be covered by unit contributions. | Define the launch expenses and the period included. |
| Unit contribution | Selling price per unit minus variable cost per unit. | The amount each sale leaves to cover those fixed costs. |
| Required unit sales | Fixed costs divided by unit contribution. | The threshold under the stated single-product assumptions. |
Source: the U.S. Small Business Administration's break-even explanation, reviewed November 11, 2026. Its single-product formula is an estimate; it does not establish demand or guarantee an accounting outcome.
Assume a hypothetical launch has $3,000 of fixed costs. The product sells for $40, and the variable costs total $25 per unit under the scope we just defined. Each sale leaves $15 to cover the launch costs. Dividing $3,000 by $15 gives a threshold of 200 units.
At 100 units, the model shows $1,500 of contribution toward those fixed costs. The launch is still $1,500 short of covering them. At 200 units, the full $3,000 has been covered. Further unit contributions add to the result within this model, as long as the assumptions stay the same.
The example uses assumed figures, not a real store's results. It also assumes the product sells at the stated price and the unit costs do not change with volume. The point is to make the target visible. A plan to sell 120 units is not enough for this cost structure merely because each of those orders leaves $15.
Keep the fixed costs at $3,000 and compare three choices. At the base price of $40 and variable cost of $25, you need 200 units. If the price falls to $35 while cost stays at $25, each sale leaves $10 and you need 300 units. The lower price requires 100 more sales to cover the same fixed cost.
Now keep the price at $40 but raise unit cost to $28. The $12 contribution means you need 250 units. The cost increase looks small next to the selling price, yet it raises the sales threshold by 50 units. That is why a discount or shipping subsidy deserves a fresh calculation.
If the calculation gives a fraction, round required unit sales up. You cannot sell part of a boxed item to cover the remaining gap. Keep the unrounded result in the working sheet so the team can see the math, then use the whole-unit threshold when comparing it with the sales plan.
This comparison does not show which price will sell better. A higher price can lower the calculated threshold while reducing demand. A lower price can raise the threshold while attracting more orders. The model reveals what must be achieved under each choice; evidence about buyers must help judge which choice is plausible.
A monthly overhead figure and a full-year sales estimate should not be compared without adjustment. Decide whether the model concerns a one-time launch, a month of trading, or another clearly defined period. Then put both the fixed costs and expected unit sales on that basis.
Watch for a cost counted twice. If a creator's fixed campaign fee is included in the launch cost, do not also spread that full fee into every unit's variable cost. A per-sale payment is different: it rises as sales rise and may belong in the variable side. The contract and the actual payment terms determine the treatment.
The influencer campaign budget guide helps identify expenses that can sit outside the visible creator fee. Bring those costs into the launch model once, under the right basis, rather than treating the ad or creator budget as a separate source of free sales.
Once the required units are clear, compare them with a defensible sales range. A follower count or a large view total is not a unit-sales forecast. Look for evidence that fits the product, price, audience, and buying route. Keep guesses labeled so they do not become hard commitments when the launch plan is shared.
If the credible range is below the threshold, consider a smaller fixed launch cost before chasing more reach. A simpler shoot, a smaller first run, or a narrower test may change the economics. The model cannot choose the creative for you, but it can show when the original plan asks too much of the sales evidence.
For a wholesale route, the selling price and cost basis change again. The wholesale-pricing guide explains that separate decision. Do not apply a direct-store price to units sold to a retailer and call the resulting threshold comparable.
If price minus variable cost is zero, more sales contribute nothing toward fixed costs in this model. If it is negative, each extra sale widens the gap. There is no finite positive unit threshold that fixes those assumptions. The price, cost, or offer must change before a larger sales target makes sense.
Multiple products add another issue: the sales mix can change. A total of 200 units means little if half the orders carry a lower contribution than the item in the example. Use product-level calculations or a clearly stated mix, and revisit it when the actual mix shifts. Keep the model close enough to the launch that the team can still act on it.
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