Calculator Inputs
Enter product economics, platform fees, advertising, returns, and taxes. Results appear above this form after submission.
Plotly Graph
This chart compares major cost components against the final net profit result.
Example Data Table
| Input | Example Value | Reason Included |
|---|---|---|
| Selling Price Per Unit | $35.00 | Defines the base revenue collected for each sale. |
| Units Sold | 500 | Scales revenue and most variable costs. |
| Referral Fee | 15% | Captures marketplace commission on sales. |
| Fulfillment Fee | $5.10 per unit | Represents pick, pack, and shipping service cost. |
| PPC Ad Spend | $900.00 | Reflects customer acquisition expense. |
| Return Rate | 6% | Estimates losses caused by returned orders. |
Formula Used
Gross Revenue = Selling Price × Units Sold
Referral Fee = Gross Revenue × Referral Fee %
Product Cost Total = Product Cost Per Unit × Units Sold
Inbound Shipping Total = Inbound Shipping Per Unit × Units Sold
Fulfillment Fee Total = Fulfillment Fee Per Unit × Units Sold
Returned Units = Units Sold × Return Rate %
Return Cost Total = Returned Units × (Product Cost Per Unit + Return Processing Per Unit)
Total Costs Before Tax = Referral Fee + Product Cost + Inbound Shipping + Fulfillment Fees + Storage + Ads + Return Cost + Discounts + Overhead
Profit Before Tax = Gross Revenue − Total Costs Before Tax
Tax Amount = Profit Before Tax × Tax %
Net Profit = Profit Before Tax − Tax Amount
Net Margin % = (Net Profit ÷ Gross Revenue) × 100
Profit Per Unit = Net Profit ÷ Units Sold
Break-Even Units = Fixed Costs ÷ Unit Contribution
How to Use This Calculator
- Enter the expected selling price and number of sold units.
- Fill in product cost, inbound shipping, and fulfillment fees.
- Add storage, advertising, coupon, and overhead totals.
- Estimate return rate and return processing cost.
- Enter the tax percentage applied to positive profit.
- Click Calculate Net Profit to view detailed results.
- Review margin, break-even metrics, and cost distribution.
- Use CSV or PDF export buttons for reporting.
Frequently Asked Questions
1. What does this calculator estimate?
It estimates net profit after marketplace fees, product cost, shipping, storage, advertising, returns, discounts, overhead, and profit tax. This gives a clearer picture than revenue alone.
2. Why include referral and fulfillment fees separately?
They behave differently. Referral fees depend on revenue, while fulfillment fees are usually charged per unit. Separating them improves pricing analysis and profit forecasting.
3. How are returns handled here?
The calculator estimates returned units from the return rate. It then assigns a loss using product cost plus return processing cost for each returned unit.
4. Does the tool calculate profit before and after tax?
Yes. It first calculates profit before tax, then applies the entered tax percentage only when profit is positive. This produces a net profit figure.
5. What is break-even price?
Break-even price shows the approximate selling price needed per unit to cover total costs and tax effect at the current sales volume. It helps pricing decisions.
6. Why is advertising entered as a total amount?
Many sellers review ad cost over a campaign, week, or month. A total amount makes it easier to compare ad spending against total revenue and profit.
7. Can I use this for monthly planning?
Yes. Enter monthly sales volume and monthly shared costs like storage, ads, and overhead. The results can support budget planning and SKU performance reviews.
8. Is this suitable for comparing products?
Yes. Run the calculator separately for each product using its own costs and fee assumptions. Comparing margins and break-even metrics helps identify stronger listings.