What should be included in cost?
Include costs that change with one additional sale: direct labor, materials, subcontractors, transaction fees, fulfillment, shipping, and similar delivery costs. Do not quietly omit your own delivery labor because no invoice arrives for it.
Is gross margin the same as net profit margin?
No. Gross margin subtracts the direct cost of the sale. Net margin also reflects overhead, owner compensation, taxes, interest, and other business expenses. A healthy-looking gross margin can still produce a weak or negative net result.
Why does a higher margin require such a large price?
The cost portion remains fixed while the target profit becomes a larger share of the final price. A 50% gross margin means cost can consume only half of revenue, so the selling price must be twice the direct cost.
Should I simply use the target price the calculator gives me?
Treat it as an economic requirement, not proof the market will accept the price. Pressure-test customer value, positioning, alternatives, demand, and whether the cost estimate is complete. If the market rejects the price, the real options are to lower cost, change the offer, accept a lower margin knowingly, or stop selling that work.
Does the selling price include sales tax?
No. Use the pre-tax selling price and direct cost. Taxability and collection rules depend on the transaction and location; add applicable tax separately using qualified guidance.