Calculate your real profit after VAT, ads, shipping and product costs.
Input details
Revenue
Product Price
£
Units Sold
Costs
Product Cost (per unit)
£
Shipping Cost (per unit)
£
Payment Processing %
Refund Rate (%)
Marketing
Fixed Costs (£)
£
Target Monthly Profit (£)
£
Common hidden costs
- Marketplace and platform fees
- Packaging and insert materials
- Returns, refunds, and chargebacks
- Storage and fulfillment handling
- Customer support time
Your Results
Enter values to see results
Revenue£0.00
Total Costs£0.00
VAT£0.00
Net Profit£0.00
Margin %0.00%
ROAS0.00x
Net Revenue—
Contribution Margin / Unit—
Break-even Units—
Break-even Revenue—
Required Revenue (Target Profit)—
Required Units (Target Profit)—
How Calculations Work
This calculator uses publicly available UK tax information including:
- • Standard UK VAT rates
- • Income tax thresholds
- • National Insurance contribution bands
- • Generalised e-commerce cost assumptions
The tool does not account for individual tax circumstances, reliefs, special accounting schemes, or complex company structures unless explicitly selected by the user.
How this calculator works
E-commerce calculation logic:
- Revenue = Product Price × Units Sold
- Net Revenue = Revenue × (1 - Refund Rate %)
- Payment Processing Fee = Net Revenue × Processing %
- Product Costs = Product Cost per Unit × Units
- Shipping Costs = Shipping per Unit × Units
- Total Costs = Product Costs + Shipping Costs + Processing Fee + Fixed Costs
- Net Profit = Net Revenue − Total Costs
- Margin % = Net Profit / Net Revenue
- Contribution Margin per Unit = Selling Price − Product Cost − Shipping − (Selling Price × Processing %)
- Break-even Units = Fixed Costs / Contribution Margin per Unit
- Break-even Revenue = Break-even Units × Selling Price
- If Target Monthly Profit is entered:
- Required Units = (Fixed Costs + Target Profit) / Contribution Margin per Unit
- Required Revenue = Required Units × Selling Price
Processing is calculated from Net Revenue.
Refunds reduce revenue BEFORE fees.
Log in to unlock all advanced metrics. The calculator is completely free.
VAT (if enabled) is excluded from profit path unless explicitly toggled.