Marketplace Pricing Calculator
Stop guessing your prices. Enter your costs and fees to find exactly what you must charge to hit your target net profit margin
Cost & Margin Inputs
How Target Pricing Works
In e-commerce, setting a price based on your desired profit margin isn't as simple as adding a flat markup to your costs. Because marketplace fees, payment processing fees, and profit margins are all percentages taken out of your <em>final selling price</em> (not your base costs), the math must be calculated inversely.
The mathematical trap: If you buy an item for $10 and want a 20% margin, selling it for $12 will not yield 20% net profit once the platform takes its 15% cut. This calculator uses the standard margin-based pricing formula: Price = Costs / (1 - Total Percentage Deductions), so the margin you enter is the margin you keep, provided your fees really are charged as a percentage of the selling price.
Required Selling Price
How to use this tool
- Pick your currency, then enter the item cost (COGS) and the shipping cost you pay.
- Enter the marketplace fee and the payment fee as percentages of the selling price.
- Enter the net margin you want to keep, as a percentage of the selling price.
- Read the target price, base costs, total fees and net profit. If fees plus margin reach 100%, the tool warns that no price can work.
Worked example
An item costs 50 to buy and 5 to ship, so base costs are 55. With a 15% marketplace fee, a 2.9% payment fee and a 20% target margin, 55 must cover only 100% − 17.9% − 20% = 62.1% of the price. The target price is 55 ÷ 0.621 = 88.57. Fees are then 88.57 × 17.9% = 15.85 and net profit is 17.71, exactly 20% of the price. Adding 20% to the cost (55 × 1.20 = 66) would be far too low, because the fees are charged on the selling price, not on the cost.
Methodology
This tool applies the standard margin-based pricing formula commonly taught in managerial accounting, where every percentage deduction is taken from the final selling price.
Lena prices a candle: why 25% markup earns her 4.5%
Lena sells hand-poured soy candles on a marketplace. Each costs €6.40 to make, plus €0.60 of packaging, which she adds to the item cost because it is a fixed amount per order. Shipping is €3.10, so base costs are 6.40 + 0.60 + 3.10 = €10.10. The marketplace takes 12%, the payment processor 3.5%, and she wants to keep 25% of every sale.
- Deductions: 12 + 3.5 + 25 = 40.5%, so the costs must fit into 59.5% of the price.
- Price: 10.10 ÷ 0.595 = €16.97.
- Fees: €2.63. Net profit: €4.24, which is 25% of 16.97.
Her first idea was 25% on top of cost: 10.10 × 1.25 = €12.63. The fees (15.5% of 12.63) then take €1.96 and only €0.57 stays with her, a 4.5% margin. She lists at €16.97 instead. Curious about a 35% margin, she changes one field and sees €20.40, a reminder that each extra point costs more as deductions grow. This is an estimate for information only: it assumes both fees are charged as a percentage of the selling price, so check your platform’s real fee rules.
Essential E-commerce Gear
A label printer, a printing calculator and a paper planner for a small online shop
JADENS Bluetooth Thermal Shipping Label Printer
A Bluetooth thermal printer for 4 × 6 shipping labels, according to the listing, which works from a phone or a computer.
Casio HR-200RC Desktop Printing Calculator
A two-color printing calculator with cost, sell and margin keys, according to the listing, for checking markups on paper.
SUNEE Small Business Budget & Expense Planner
An undated 12-month planner for small-business income and expenses, according to the listing.
As an Amazon Associate we earn from qualifying purchases at no additional cost to you.
Frequently asked questions
What is the difference between markup and margin? ▼
Markup is a percentage added to your base cost (e.g., adding 50% to a $10 item makes it $15). Margin is the percentage of the final selling price that is profit (e.g., making $5 profit on a $15 sale is a 33.3% margin). Marketplaces usually take their commissions as a percentage of the final price, which is why this calculator uses inverse margin math rather than simple markup. Some platforms also charge fixed per-order fees.
Does this tool work for digital products or info-products? ▼
Yes. If you sell e-books or courses on platforms like Gumroad or Hotmart, simply leave the “Item Cost” and “Shipping Cost” at 0, or enter any fixed acquisition costs you have. The math for platform fees and target margins remains exactly the same.
Where do I enter fixed per-order fees, taxes or ad costs? ▼
The calculator only has percentage fields for marketplace fee, payment fee and margin, which are applied to the final price. A fixed amount per sale, such as a flat fee, packaging or ad spend per order, can be added to Item Cost or Shipping Cost, since both go into the base costs. Remember that this is an estimate and platform rules differ.
Can I include sales tax, VAT or advertising in the price? ▼
Only if they behave as a percentage of the selling price. A tax charged as a share of revenue, or ad spend you budget as a percentage of sales, can be added to the “Marketplace Fee” field. Sales tax or VAT that is added on top of the price at checkout is not part of your revenue, so leave it out and check how your platform and country display prices before publishing one.