Profit calculator
Ecommerce Profit Calculator
See what one ecommerce order actually leaves behind after product cost, shipping, fees, advertising, returns and the other variable costs you enter.
Net profit per order
$19.30
You keep $19.30 from a $80.00 order after the costs and ad spend you entered.
Net margin
24.1%
Profit after all entered variable costs as a share of revenue.
Contribution before ads
$39.30
What is left to pay for acquisition and profit.
Max break-even CPA
$39.30
The most this order can spend on acquisition before profit reaches zero.
Break-even ROAS
2.04x
The minimum revenue return required if this order came from paid ads.
Actual ROAS
4.00x
Order revenue divided by the ad cost / CPA you entered.
Total variable costs
$60.70
Every per-order cost entered, including advertising.
Projection
At 100 orders per month
Monthly revenue
$8,000.00
Monthly profit
$1,930.00
A straight-line projection: same order economics multiplied by the order count. It does not model fixed costs or changing ad efficiency at scale.
Where the order revenue goes
$80.00 of order revenue split across the variable costs you entered and the profit left over.
- Product cost$25.0031.3%
- Shipping & fulfilment$8.0010.0%
- Percentage fees$2.403.0%
- Fixed transaction fee$0.300.4%
- Expected returns/refund loss$3.003.8%
- Other variable cost$2.002.5%
- Advertising / CPA$20.0025.0%
- Net profit$19.3024.1%
What your ecommerce profit result means
Revenue is not profit. This calculator starts with what the customer paid, then removes the per-order costs you entered. The result is the amount that order actually contributes after acquisition cost — before fixed overhead such as salaries, software and rent.
Worked ecommerce profit example
Take an $80.00 order with $25.00 of product cost, $8.00 of fulfilment, 3% percentage fees, a $0.30 fixed transaction fee, $3.00 of expected returns/refund loss, $2.00 of other variable cost and $20.00 of advertising cost.
Before advertising this order has $39.30 available, so its maximum break-even CPA is $39.30 and its break-even ROAS is 2.04x. At the entered $20.00 CPA, the actual ROAS is 4.00x and the order keeps $19.30.
Net margin vs contribution margin
Contribution before ads tells you how much acquisition budget exists. Net margin tells you what is left after the acquisition cost you actually entered. They answer different questions: contribution sets your ceiling; net margin tells you whether the current order is worth scaling.
How to model returns and refunds
Return economics differ by business: some products come back into sellable inventory, some incur two-way shipping, and some refunds never recover the product. Instead of assuming a universal return rate, the calculator asks for your expected loss per order. Use the average economic loss from refunds, return handling and unrecovered goods that your own data supports.
How ad spend changes ecommerce profit
Advertising is deliberately separated from the other variable costs. That lets the tool show your contribution before ads, your maximum break-even CPA and your actual profit at the CPA you entered. If actual CPA is above maximum CPA, the order loses money even when the ads dashboard reports revenue growth.
Need the same limit expressed as a return ratio? Use the Break-Even ROAS Calculator.
What the monthly projection does — and does not do
The monthly figures simply multiply the current per-order economics by the order count. They do not include fixed overhead or assume ad efficiency stays constant as spend grows. Treat the projection as a sensitivity check, not a forecast.
Related guides
- How to Calculate Ecommerce ProfitThe full per-order cost stack, the order of subtraction and the difference between contribution and net profit.
Methodology
How the Ecommerce Profit Calculator calculates
Costs included
- Product cost (COGS)
- Seller-paid shipping and fulfilment
- Percentage payment/platform fees and a fixed transaction fee
- Advertising cost or CPA per order
- Expected returns/refund loss entered by you
- Other per-order variable costs entered by you
Costs excluded
- Fixed overhead: salaries, rent, software and subscriptions
- Tax and VAT unless you intentionally enter them as a cost
- Customer lifetime value and repeat purchases
- Changes in CPA or conversion rate as volume scales
Assumptions
- All inputs refer to the same average order and use one currency
- Percentage fees are charged on selling price plus shipping charged
- The return/refund field is an expected economic loss per order, not a return-rate guess
- The monthly projection repeats the same order economics without scale effects
Calculations run locally in your browser. No figures are transmitted, logged or stored, and the page works with the network disconnected once loaded.
Formula and copy last reviewed 2026-08-20. Read how every calculator on this site is built and checked in the methodology.
This tool is informational. It is not accounting, tax, investment or financial advice, and it does not replace your own books.
Frequently asked questions
What is a good ecommerce profit margin?
There is no universal target. Margin depends on category, fulfilment model, acquisition cost and fixed overhead. Use your own cost stack and compare the result with the margin your business needs to cover fixed costs and reinvestment.
Should I include shipping the customer pays?
Yes. Put customer-paid shipping in “Shipping charged” and the fulfilment/postage you pay in “Shipping & fulfilment cost.” The difference then flows through profit correctly.
What if the sale is organic and has no ad cost?
Enter 0 for advertising cost. The calculator will show contribution and profit without an actual ROAS, because dividing revenue by zero ad spend would not be meaningful.
Does this include fixed business expenses?
No. This is an order-level variable-profit calculator. Fixed expenses belong in a store-level break-even model, not inside every order unless you deliberately allocate them per order.