How to Use the Omni-Channel P&L Calculator
Our free profit and loss calculator gives online sellers a precise, real-time breakdown of what they actually take home after platform fees, shipping costs, VAT, and HMRC obligations. Simply enter your sale price, unit costs, and choose your platform to get an instant result.
📦 eBay Fee Calculator
Calculates eBay's Final Value Fee, per-order fixed fee, regulatory operating fee (0.35%), and promoted listings cost — with seller level adjustments for Top Rated sellers.
🛒 Amazon Fee Calculator
Covers Amazon referral fees by category, per-item closing fees, and international transaction surcharges for sellers shipping overseas.
🎨 Etsy Fee Calculator
Includes Etsy's 6.5% transaction fee, $0.20 listing fee, payment processing and optional offsite ads deduction — fully calculated per sale.
📱 TikTok Shop Calculator
Accounts for TikTok Shop's referral fees and commission model — increasingly popular for UK dropshippers and D2C brand sellers in 2025.
What Do Net Profit, Margin and ROI Mean?
Net Profit is the money remaining after subtracting all platform fees, cost of goods, shipping costs, and VAT obligations from your total revenue.
Profit Margin % expresses net profit as a percentage of total revenue. A margin above 20% is generally healthy for ecommerce businesses.
ROI (Return on Investment) measures how much profit you earn relative to what you spent. An ROI of 100% means you doubled your total investment.
HMRC Flat Rate VAT for UK Sellers
If you're VAT-registered in the UK and use the Flat Rate Scheme, enable the VAT toggle and enter your flat rate percentage. The calculator will display your estimated HMRC obligation so you know your true take-home profit after all tax obligations are met.
How Promoted Listings Affect Your Profit
eBay's promoted listings feature charges an ad rate (typically 2–15%) when a buyer clicks your promoted listing and purchases within 30 days. Enter your chosen ad rate to find the optimal balance between visibility and profit margin.