How to Price a Product for E-commerce: The Complete Formula

Q: How do you calculate product price from cost?

Divide your total cost by (1 minus your target margin). For example, if total cost is $15 and you want a 40% margin: Price = $15 ÷ (1 − 0.40) = $25. This ensures your margin is calculated on the selling price, not the cost.

Q: What is a good profit margin for e-commerce?

Net profit margins of 15–30% are healthy for e-commerce. Amazon FBA sellers often target 20–30% before advertising. Etsy and Shopify sellers vary widely. Under 15% leaves little room for advertising, returns, and price fluctuations.

Q: What is the difference between markup and margin?

Markup is profit as a percentage of cost. Margin is profit as a percentage of selling price. A 50% markup on a $10 cost gives a $15 price and a 33% margin. Always use margin when talking to investors or evaluating platform fee percentages.

Q: How do I find my break-even price?

Break-even price = total cost per unit (COGS + all fees + advertising) with zero profit. Any price above this is profitable. You want to be well above break-even — typically 20–40% above — to have a viable business.

Pricing a product wrong is one of the most common ways e-commerce sellers lose money. Price too low and you work hard for nothing. Price too high and you lose the sale to a competitor. Here's the complete formula for pricing any product for e-commerce.

Step 1: Calculate Your Total Cost Per Unit

Your total cost includes every expense you incur to get the product sold and delivered:

Cost Component	Example (per unit)
Product cost (COGS)	$8.00
Shipping to warehouse (freight ÷ units)	$1.20
Import duty	$0.60
FBA fulfillment fee	$3.50
Platform referral fee (15%)	$4.50
Advertising (target 10% of revenue)	$3.00
Returns allowance (5% rate)	$0.75
Total cost	$21.55

With a $30 selling price: profit = $30 − $21.55 = $8.45 per unit = 28% margin. That's a viable product.

The Pricing Formula

Once you know your total cost and target margin, the formula is:

Selling Price = Total Cost ÷ (1 − Target Margin)

If total cost is $15 and you want a 35% margin:

Price = $15 ÷ (1 − 0.35) = $15 ÷ 0.65 = $23.08

Round to a market-appropriate price (e.g., $22.99 or $24.99).

Price & Margin Calculator — enter your cost and target margin to get selling price, or enter your price to see margin.

Markup vs Margin: Don't Confuse Them

This is the most common pricing mistake. Markup and margin are both percentages but they're calculated differently:

	Markup	Margin
Formula	Profit ÷ Cost	Profit ÷ Selling Price
Example	$5 profit on $10 cost = 50% markup	$5 profit on $15 price = 33% margin
Used for	Internal cost-plus pricing	P&L, investor metrics, fee calculations

Amazon referral fees are expressed as a percentage of selling price — that's a margin calculation. If Amazon takes 15% of revenue, and you calculated that as 15% of your cost, you've underpriced and will lose money.

Competitive Pricing: What the Market Will Bear

Cost-plus pricing gives you a floor. Market pricing tells you what buyers will actually pay. The two must intersect:

Search your product on Amazon/Etsy. What do comparable products sell for?
If market price is above your minimum price: you have room. Consider pricing 10–15% below the average for launch, then raise once reviews build.
If market price is below your minimum price: the product economics don't work. Either find a cheaper supplier, reduce COGS, or don't launch.

Psychological Pricing

Charm pricing: $29.99 outperforms $30.00. The left digit changes (2 vs 3), which is cognitively significant.
Price anchoring: show a higher crossed-out "list price" alongside your price. Creates perceived value even if the original price was arbitrary.
Bundle pricing: "3-pack for $24.99" can increase average order value and make per-unit price comparisons harder for competitors.

When to Raise Prices

Most sellers underprice, especially at launch. Signs you should raise prices:

Consistently selling out of stock faster than you can restock
Conversion rate is high (above 15–20%) but margin is thin
Reviews are strong and you're page 1 — price sensitivity drops with social proof
COGS or freight costs have increased

Test a 10–15% price increase and monitor conversion rate for 2 weeks. Often the conversion drop is smaller than the margin gain.

Frequently Asked Questions

How do you calculate product price from cost?

Price = Total Cost ÷ (1 − Target Margin). For example, $15 cost at 40% target margin = $15 ÷ 0.60 = $25.

What is a good profit margin for e-commerce?

15–30% net margin is healthy. Amazon FBA sellers typically need 20–30% before advertising to stay profitable after ad spend.

What is the difference between markup and margin?

Markup is profit as % of cost; margin is profit as % of selling price. A 50% markup = 33% margin. Always use margin when evaluating platform fees and P&L.

How do I find my break-even price?

Sum all costs per unit (COGS + fees + freight + ads). That's your break-even. Your actual selling price should be 20–40% above break-even.