What commission does OnBuy charge sellers?

OnBuy charges between 5% and 9% commission depending on your subscription plan. The Standard plan costs GBP 19/month with 9% commission. The Professional plan costs GBP 39/month with 7% commission. The Enterprise plan costs GBP 79/month with 5% commission. There are no listing fees, no final value fee surcharges, and no payment processing fees on top — making OnBuy's total fee structure among the lowest of UK marketplaces.

How does OnBuy compare to Amazon and eBay on fees?

OnBuy's total fees are significantly lower than Amazon and eBay. Amazon UK charges 7-15% referral fee plus GBP 25/month for Professional sellers, plus FBA fees if used. eBay charges 12-14% final value fee plus GBP 0.30 per order. OnBuy's 5-9% commission (depending on plan) with no per-order fees makes it the lowest-cost major UK marketplace. For a GBP 50 sale, OnBuy takes GBP 2.50-4.50 versus Amazon's GBP 5-7.50 and eBay's GBP 6.30-7.30.

Which OnBuy subscription plan should I choose?

It depends on your monthly sales volume. The break-even point between Standard (GBP 19/mo, 9%) and Professional (GBP 39/mo, 7%): if you sell more than GBP 1,000/month, Professional saves money. Between Professional and Enterprise (GBP 79/mo, 5%): if you sell more than GBP 2,000/month, Enterprise is cheaper. Calculate your expected monthly revenue and compare total costs (subscription + commission) to find the optimal plan.

Does OnBuy charge payment processing fees?

No. Unlike Amazon and eBay, OnBuy does not charge separate payment processing fees. The commission rate (5-9% depending on your plan) covers everything — marketplace access, payment processing, buyer protection, and customer service. This simplicity is one of OnBuy's key advantages and makes profit calculation straightforward.

What is a good profit margin on OnBuy?

With OnBuy's lower fee structure (5-9% commission), healthy profit margins are more achievable than on Amazon or eBay. Target at least 20-30% net margin after all costs. Since OnBuy fees are 5-10% lower than competitors, you can either maintain higher margins or price more competitively to win the Buy Box. Many sellers use OnBuy's lower fees to undercut their Amazon/eBay pricing by 3-5%, driving volume while maintaining equivalent or better margins.

How do I reduce my OnBuy selling costs?

Key strategies: 1) Choose the right subscription plan — upgrade when your volume justifies the lower commission rate. 2) Optimize dispatch costs by negotiating courier rates and using lightweight packaging. 3) Minimize returns by writing accurate descriptions and using clear product images. 4) Price strategically — OnBuy's Buy Box favors lowest price, but don't race to zero margin. 5) Bundle products where possible to increase average order value and spread fixed costs. 6) Monitor your break-even price and never list below it.

Free Tool

OnBuy Profit Calculator

Calculate your true OnBuy profit after commission (5-9%), subscription fees, shipping, and product costs. Compare plans side-by-side and see your prorated per-item fees, margin, and ROI in GBP.

Last updated: March 2026

Sale & Cost Details

Enter your selling price, plan, and costs in GBP

Sale Price (GBP)

GBP

OnBuy Plan

Monthly Sales Volume

Used to prorate the monthly subscription per item

Your Costs

Cost of Goods (COGS)

GBP

Shipping Cost

GBP

Packaging Cost

GBP

Other Costs

GBP

Quantity to Calculate

Net Profit

£17.17

Profit Margin

49.1%

ROI

120.1%

Monthly Profit

£858.50

Profit Breakdown

Detailed breakdown of revenue, OnBuy fees, and costs per item

Item	Amount
Sale Price	£35.00
Commission (9%) Standard plan rate	-£3.15
Subscription (prorated) £19.00/mo / 50 items	-£0.38
Total OnBuy Fees (10.1%)	-£3.53
Cost of Goods (COGS)	-£10.00
Shipping Cost	-£3.50
Packaging	-£0.80
Net Profit	£17.17

Revenue Distribution

Profit (49.1%)

Your Costs (40.9%)

OnBuy Fees (10.1%)

Plan Comparison (at 50 units/month)

Standard

£17.17

9% + £19.00/mo

Professional

£17.47

7% + £39.00/mo

Enterprise

£17.37

5% + £79.00/mo

Understanding OnBuy Profit Margins

OnBuy has positioned itself as the seller-friendly alternative to Amazon and eBay in the UK market. With commission rates of 5-9% (depending on your plan) and no hidden payment processing fees, OnBuy offers the lowest total selling costs among major UK marketplaces. This calculator helps you see exactly how these fees affect your bottom line — including the prorated subscription cost per item.

OnBuy Fee Structure in 2026

OnBuy uses a subscription-plus-commission model. You pay a monthly subscription (GBP 19-79) plus a commission on each sale (5-9%). Higher subscription tiers give lower commission rates. There are no listing fees, no per-order fees, and no separate payment processing charges. This all-inclusive approach makes profit calculation simple: your only OnBuy costs are the commission plus your share of the monthly subscription.

Choosing the Right Plan

The optimal plan depends on your sales volume. The formula is straightforward: calculate your total monthly costs (subscription + commission on all sales) for each plan and pick the lowest. For most sellers, Professional (GBP 39/month, 7%) becomes optimal around GBP 1,000/month in sales, and Enterprise (GBP 79/month, 5%) around GBP 2,000/month. If you're just starting, the Standard plan has the lowest entry cost and you can upgrade as volume grows.

OnBuy vs Amazon UK vs eBay UK: Fee Comparison

For a typical GBP 30 sale: OnBuy Enterprise takes GBP 1.50 (5%) plus prorated subscription. Amazon UK takes GBP 3.00-4.50 (10-15% referral) plus GBP 2.08 prorated Professional subscription. eBay takes GBP 3.90-4.20 (13-14% FVF) plus GBP 0.30 per-order fee. OnBuy's cost advantage is clear — you keep GBP 1.50-3.00 more per sale compared to Amazon and eBay, which adds up significantly at volume.

Maximizing OnBuy Profitability

The key to OnBuy profitability is volume. Because the subscription fee is fixed monthly, selling more items reduces your per-item subscription cost. A seller on the Enterprise plan (GBP 79/month) selling 200 items/month pays only GBP 0.40 per item in subscription costs, making their effective total fee rate just 5.4%. Combine this with competitive pricing to win the Buy Box, and OnBuy can be your most profitable UK sales channel by a significant margin.

FAQ

Frequently Asked Questions About OnBuy Profit

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