Enter monthly store inputs
The page stays in a single content column, while the calculator fields adapt to larger and smaller screens.
Example data table
Use this sample set to validate the calculator before entering real store numbers.
| Metric | Sample value | Metric | Sample value |
|---|---|---|---|
| Monthly orders | 1,200 | Average order value | $48.00 |
| Shipping income | $2,400.00 | Other income | $600.00 |
| Discount rate | 8% | Refund rate | 5% |
| COGS | 34% | Packaging cost | $0.85 per order |
| Shipping label cost | $5.40 per order | Payment fee rate | 2.9% |
| Fixed payment fee | $0.30 per order | Ad spend | $9,500.00 |
| Influencer spend | $1,800.00 | Platform fees | $650.00 |
| App subscriptions | $420.00 | Payroll and overhead items | $6,550.00 total |
Formula used
- Gross product sales = Monthly orders × Average order value
- Discount amount = Gross product sales × Discount rate
- Refund amount = (Gross product sales − Discounts) × Refund rate
- Kept product revenue = Gross product sales − Discounts − Refunds
- Net revenue = Kept product revenue + Shipping income + Other income
- COGS = Kept product revenue × COGS percentage
- Payment fees = (Net revenue × Payment fee rate) + (Orders × Fixed payment fee)
- Variable costs = COGS + Packaging + Shipping labels + Return handling + Payment fees
- Fixed costs = Marketing + Software and platform cost + Payroll and overhead
- Profit before tax = Net revenue − Variable costs − Fixed costs
- Estimated tax = Profit before tax × Tax rate, when profit is positive
- Net profit = Profit before tax − Estimated tax
- Net profit margin = Net profit ÷ Net revenue × 100
- Contribution margin = (Net revenue − Variable costs) ÷ Net revenue × 100
- Breakeven orders = Fixed costs ÷ Contribution per order, rounded upward
How to use this calculator
- Enter your monthly order count and average order value first.
- Add shipping income and any extra revenue collected during the month.
- Fill in discount rate and refund rate from your store reports.
- Enter product, packaging, shipping, and return handling costs.
- Include payment processing rates and fixed fees per order.
- Add ads, influencer budgets, platform fees, payroll, and overhead.
- Enter an estimated tax rate if you want after-tax profit.
- Press the calculate button to show results above the form.
- Use the CSV or PDF buttons to export the summary.
FAQs
1. What does this monthly profit calculator measure?
It estimates monthly ecommerce profitability after discounts, refunds, variable costs, marketing, software, overhead, and estimated tax. It helps you see whether revenue is truly turning into retained profit.
2. Should shipping income be included in revenue?
Yes. If customers pay shipping, enter that amount as shipping income. The calculator then compares that collected amount against your shipping label costs to reveal whether fulfillment is subsidized or profitable.
3. How is refund rate handled here?
Refund rate is applied after discounts. This mirrors many store reports, where discounted sales are the starting point before chargebacks, returns, or customer refund adjustments reduce retained product revenue.
4. Why separate variable and fixed costs?
Separating them helps you understand scalability. Variable costs rise with orders, while fixed costs stay relatively stable each month. That distinction makes breakeven orders and contribution margin far more useful.
5. What is contribution margin in this calculator?
Contribution margin shows how much revenue remains after variable costs. That remainder is what covers fixed expenses and profit. A weak contribution margin often signals pricing, fulfillment, or fee problems.
6. Can I use this for marketplaces and direct stores?
Yes. Enter marketplace commissions under platform fees, or add storefront software charges under app subscriptions. The calculator works for direct-to-consumer stores, marketplaces, and blended channel operations.
7. What does breakeven orders tell me?
Breakeven orders estimate the minimum monthly volume needed to cover fixed expenses, based on current contribution per order. It is useful when testing budgets, pricing changes, or seasonal sales forecasts.
8. Are taxes always deducted from profit?
No. Estimated tax is only applied when profit before tax is positive. Loss-making months show zero estimated tax, helping you avoid overstating the impact of tax expense on weak performance.