⚡ Free Seller Tool
OnBuy Fee & Profit Calculator (Rates & VAT)
Calculate exact OnBuy marketplace category commissions, UK/EU VAT deductions, Boost ad spend, and final net profit margins in real time.
Calculation Inputs
£
Price excluding VAT.
£
Your buy/supplier price.
£
Shipping charged to customer.
£
Courier or packaging cost.
%
Standard: 20%
%
Performance ad rate (0% or 5% to 30%).
Profit & Fee Analysis
REVENUE BREAKDOWN
VAT on Item Price
£0.00
Total Customer Payment
£0.00
MARKETPLACE FEES & PROMOTIONS
Category Commission
£0.00
Boost Advertising
£0.00
NET PROFIT SUMMARY
Total Deductions (Costs + Fees + VAT)
£0.00
PERFORMANCE METRICS
Profit Margin
0.00%
Return on Investment (ROI)
0.00%
Calculated via getmytracks.com • OnBuy Seller Calculator
How to Price for Profit on OnBuy
Selling on OnBuy differs fundamentally from platforms like Amazon or eBay. Because OnBuy operates purely as a third-party marketplace without competing against its own merchants, seller visibility relies primarily on product data quality, delivery reliability, and accurate pricing.
Key Accounting Principle: OnBuy calculates commission on the delivered total (Product Price + Shipping Charged to Buyer). Splitting item price into shipping charges does not reduce your marketplace commission.
Understanding the OnBuy Category Fee Matrix
Rather than charging a flat fee across all items, OnBuy sets category-specific commissions. Standard rates range from 7% on high-ticket items like Consumer Electronics to 20% on Jewellery.
| Category Group | Commission Rate | Pricing & Margin Strategy |
|---|---|---|
| Consumer Electronics & Large Appliances | 7% | Thin margins require strict courier and return cost tracking. |
| Baby, Food, Consoles & Health/Beauty | 8% | Competitive rate allowing higher promotional Boost spend. |
| Beer, Wine & Spirits | 10% | High volume; account for excise duty and fragile packaging. |
| DIY, Tools & Power Tools | 13% | Weight-based logistics can heavily influence net contribution. |
| Standard / Clothing / Toys / Pet / Home | 15% | The baseline rate across the majority of retail catalogue items. |
| Jewellery | 20% | High commission category; ensure healthy initial markups. |
Accounting Best Practices for OnBuy Merchants
To avoid cash flow misalignments and incorrect tax filings, keep the following accounting rules in place:
- Track Payout Timing Accurately: OnBuy payouts generally become available around 7 days after the delivery window ends. Do not treat bank deposits as revenue on the date they land.
- Isolate Boost Ad Costs: Treat OnBuy Boost (5% to 30%) as an advertising expense in Xero or QuickBooks rather than blending it into general marketplace fees.
- Monitor VAT Thresholds Across All Channels: The £90,000 UK VAT registration threshold applies to your combined taxable sales across OnBuy, Amazon, eBay, and your own online store.