How to calculate wholesale margins and price for resale

Two mistakes account for most of the pricing errors in small retail: confusing margin with markup, and treating the supplier’s unit price as the cost of the product. Both make a business look more profitable on paper than it is in the bank.

Start with landed cost, not unit price

The number on the quote is not what the product costs you. Landed cost is everything you spend to get one sellable unit onto your shelf:

• The unit price itself
• Freight, divided across the units in the shipment
• Any duties or import charges
• Payment and bank transfer fees
• Repackaging or labelling you do yourself
• An allowance for units that arrive damaged or unsellable

A product quoted at $4.00 with $0.45 of freight, $0.10 of fees and a 2% damage allowance lands closer to $4.63. Price off $4.00 and you have quietly given away most of a discount you never agreed to.

Margin and markup are different numbers

This is the single most common arithmetic error in retail pricing.

• Markup is measured against your cost. (Price − Cost) ÷ Cost
• Margin is measured against your selling price. (Price − Cost) ÷ Price

Buy at $5 and sell at $10, and that is a 100% markup but a 50% margin. The same trade, two very different-looking numbers. Suppliers and buyers often quote different ones, so always confirm which is meant.

Pricing to a target margin

To hit a margin you have chosen, divide the landed cost by one minus that margin:

Price = Landed cost ÷ (1 − target margin)

So a $4.63 landed cost at a 45% target margin gives $4.63 ÷ 0.55, which is about $8.42. Multiplying the cost by 1.45 instead would give $6.71 — a 31% margin, not 45%. That gap is where businesses lose money without noticing.

Build in what will actually happen

A margin that only works when everything goes right is not a margin. Before settling on a price, allow for:

• Discounting. If you run sales, some of your stock sells below list. Price so the discounted price is still profitable, not just the full one.
• Returns. A returned unit costs you the shipping both ways and sometimes the whole unit.
• Marketplace fees. If you sell on a marketplace, its commission comes off every sale. Treat it as a cost, not an afterthought.
• Slow stock. Units that sit for months carry a real cost in capital and storage, even though nothing appears on an invoice.

Check the margin in dollars, not just percent

Percentages hide scale. A 60% margin on a $3 item is $1.80. A 35% margin on a $40 item is $14. If your time per sale is similar, the lower-percentage product is the better business.

This matters most when deciding what to stock more of. Sort your products by margin in dollars per unit, and again by margin in dollars per week of shelf space, and the picture usually differs from the percentage ranking.

Revisit prices when your costs move

Landed cost is not fixed. Freight rates change, suppliers adjust tiers, and payment fees vary. Recalculate whenever:

• A supplier issues a new price list
• Your shipping cost per unit changes because the order size changed
• You move to a different price tier
• You start selling through a new channel with different fees

The short version

Work from landed cost, not the quoted unit price. Know whether you are being quoted margin or markup, and use cost ÷ (1 − margin) when pricing to a target. Leave room for discounts, returns and fees before you commit to a price, and judge products by margin in dollars as well as percent.