Shopify Profit Calculator accuracy and testing

Formula source

• Profit per order = selling price - product cost - shipping cost - ad cost - platform cost - payment fee - return allowance. Payment fee = selling price * payment fee percent / 100 + fixed fee.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• Enter your own payment pricing because processor and Shopify fee schedules can change.
• The model is per order and does not include taxes, refunds already processed, chargebacks, or fixed payroll.
• Calculations run locally and do not store store or product data.

Unit handling

• Selling Price accepts values in $.
• Product Cost accepts values in $.
• Shipping Cost accepts values in $.
• Ad Cost per Order accepts values in $.
• Platform Cost per Order accepts values in $.
• Payment Percent Fee accepts values in %.
• Payment Fixed Fee accepts values in $.
• Return Allowance accepts values in %.
• Profit per Order is displayed as currency.
• Contribution Margin is displayed as a percentage.
• Payment Fee is displayed as currency.
• Total Variable Cost is displayed as currency.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Currency outputs are displayed with standard US dollar formatting.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log