You can add a healthy-looking percentage to a product and still finish with less margin than you intended. The mistake usually happens before any arithmetic: the percentage is attached to the wrong starting number. Markup compares the difference between price and cost with cost. Gross margin percentage compares that same difference with selling price. The money can be identical while the percentages differ. For a small shop or studio, writing the denominator beside the percentage is a useful habit because it makes conversations about pricing much less ambiguous.
Begin with a cost you can explain
Use one clearly defined unit. That might be a finished notebook, a workshop place or a specified service package. Decide what belongs in its cost before choosing a percentage. A maker who includes materials but forgets paid assembly time has not found a cheaper way to price the product; the calculation simply leaves out a cost. The Australian Government's pricing guidance is useful background for identifying costs and considering approaches beyond cost alone. It does not supply a universally correct margin for your business.
For the invented example here, a finished item costs 60 currency units to make and supply under the chosen definition. That definition is held constant throughout the comparisons. These are illustrative inputs, not a market quotation or a suggested industry benchmark. If your cost changes, every downstream result needs to change with it. Use the Product unit cost tool first when usable output depends on rejects or a shared batch overhead.
Follow the same money through two percentages
Suppose you add 25% of the 60 cost. The addition is 15, so the selling price becomes 75. You have a difference of 15 between selling price and the included cost. Divide 15 by 60 and the markup is 25%. Divide 15 by 75 and the gross margin is 20%. Nothing went missing between those calculations. You changed the base against which the difference was measured. AccountingCoach explains this denominator distinction; the figures here are a separate worked example.
Now suppose the requirement really is a 25% gross margin. Seventy-five percent of selling price must cover the 60 cost, so the price is 60 divided by 0.75, or 80. The difference is 20. Twenty divided by 80 confirms the desired margin. The required markup is 20 divided by 60, approximately 33.33%. In the Markup & margin pricing tool, enter cost 60, markup 25 and margin 25 to compare the alternative prices side by side.
Give discounts their own calculation
A discount changes selling price while the included cost may remain unchanged. If the 80 price is discounted by 10%, the buyer pays 72. The difference above cost is then 12, and gross margin is approximately 16.67%. It is not 25% minus ten percentage points, and it is not the same as reducing your cost by 10%. This is why a percentage-off label is insufficient for comparing commercial outcomes. Carry the actual amounts through the calculation.
Volume introduces another question. Selling more units with a smaller contribution can increase or decrease total contribution depending on the numbers. Use Promotion profit comparison to enter a baseline volume, a proposed volume and any extra campaign cost. Treat the proposed volume as a scenario assumption. The tool does not predict demand, and a higher revenue total does not demonstrate a better contribution result. Check both the per-unit economics and the resulting period total.
Keep gross margin separate from the money you can withdraw
The difference above an included unit cost still has to support costs left outside that definition. Depending on how you organized the model, those may include administration, rent, marketing, refunds or financing. Tax treatment also requires a separate check. A displayed 25% gross margin is therefore not a promise that you can take home one quarter of every payment. Avoid using gross margin and net profit interchangeably in a quotation or internal report.
Consistency matters more than an impressively precise percentage. If one supplier comparison includes inbound freight and another excludes it, the percentages are not yet comparable. Write a short note beside your cost: what it includes, the quantity basis, the currency and when the estimate was checked. If the product is manufactured in batches, use usable units rather than all units started when rejects consume the same batch resources. That makes your selling-price exercise easier to audit later.
Test a decision before publishing a price
Create three versions of your own example: the current cost, a plausible higher cost and a discounted selling price. Keep those assumptions visible instead of silently overwriting the first result. Ask which change would make the offer uncomfortable, and what evidence you would need before accepting it. These are planning questions, not a recommendation to charge a particular amount. Customer value, alternatives, capacity and contractual commitments remain outside a simple denominator calculation.
Before sharing the result, read it aloud with its base: “25% markup on included cost” or “25% gross margin on selling price.” Confirm the price's tax basis separately and make sure the unit being sold matches the unit being costed. A clear statement is more useful than a bare percentage. Once the numbers and definitions agree, copy the result into your own pricing records and review it when costs or the offer change.