Cost Plus Pricing Calculator

How the figure is built

Cost-plus pricing sets price as cost multiplied by one plus a target markup: price = cost × (1 + markup). If you are working from a target margin instead, the arithmetic changes to division: price = cost ÷ (1 − margin).

The distinction is exactly the markup-versus-margin problem in its most consequential form. Adding 40% to cost produces a 28.6% margin; achieving a 40% margin requires adding 66.7%. Choosing the wrong operation systematically underprices every product in the catalogue.

Numbers on it

Cost $22, target margin 45%. The price is $22 ÷ 0.55 = $40. Check it: profit is $18 on a $40 price, which is 45%.

Now the mistaken version. Adding 45% to $22 gives $31.90, on which the margin is $9.90 ÷ $31.90 = 31%. The intended 45% has become 31%, and on a catalogue of two hundred products priced the same way the business is running fourteen points light without anyone having made a visible decision.

The error compounds with volume. A business doing $500,000 of revenue at an intended 45% margin and an actual 31% is $70,000 of gross profit short of its own plan.

Where the figure deceives

Cost-plus prices from the wrong end. It tells you what you need and says nothing about what the market will pay, which means it produces prices that are too low on products people value highly and too high on commodities.

It also embeds whatever inefficiency exists in your cost. A supplier price that is 20% above market is passed straight through into a retail price 20% above competitors, and the method offers no mechanism for noticing.

Acting on it

Use it as a floor rather than a price. The cost-plus figure is the lowest price that meets your margin requirement, and the actual price should be set by what the market bears, checked against that floor.

Where the market price is well above the cost-plus figure, the difference is value you are capturing rather than a mistake. Where it is below, the product either needs a cheaper cost base or should not be in the range.

What belongs in cost before you add anything

The most common failure of cost-plus pricing is not the arithmetic but the cost. A price built on the supplier's invoice alone is built on perhaps two thirds of what the unit really costs.

The full landed figure includes inbound freight, duty, insurance, the customs brokerage spread across the shipment, and inspection. Then the per-unit operational costs: packaging, the labour to pick and pack, payment processing, and an allowance for returns and damage. On imported goods that full figure commonly runs 30% to 45% above the invoice.

A business applying a 45% margin to the invoice price rather than the landed cost is achieving perhaps 25% in reality, and it will discover this at the year-end accounts rather than at the point of pricing, which is when it is hardest to fix.

The fix is to build the landed figure once per product and price from that, rather than recalculating from the invoice each time a supplier quote changes. It also makes supplier comparisons honest, because two quotes with different freight and duty profiles are only comparable once both have been landed.