How to Set Up Your OnBuy Seller Account: Step-by-Step Guide

## Why Sell on OnBuy? Before diving into the setup process, it is worth understanding why OnBuy is attracting sellers in 2026. The platform has grown significantly over the past few years, offering lower fees than many competitors and a level playing field where the marketplace does not compete against its own sellers. For UK-based retailers especially, OnBuy represents a genuine opportunity to reach millions of buyers without the overhead costs associated with larger platforms. OnBuy charges no listing fees and takes a straightforward commission on sales, making it a low-risk channel to add to your selling strategy. Whether you are an established multi-channel seller or launching your first online business, the barrier to entry is refreshingly low. ## Step 1: Create Your OnBuy Seller Account Head to the OnBuy Seller Centre and click the registration button. You will be asked to provide your business name, email address, and a secure password. OnBuy supports both individual and business seller accounts, though business accounts provide access to additional features and tend to inspire more buyer confidence. Fill in your company details accurately. This includes your registered business address, company number (if applicable), and VAT registration number. OnBuy uses this information for verification and to ensure compliance with UK trading regulations. Double-check everything before submitting, as errors can delay the approval process. ## Step 2: Verify Your Identity and Business After registration, OnBuy will ask you to verify your identity and business credentials. This typically involves uploading a form of government-issued ID and proof of business registration. The verification process is designed to protect both sellers and buyers by ensuring that all sellers on the platform are legitimate businesses. Verification usually takes between one and three business days. During this time, you can begin familiarising yourself with the Seller Centre interface, but you will not be able to list products or process orders until verification is complete. Keep an eye on your email for any requests for additional documentation. ## Step 3: Configure Your Payment Settings Once verified, you need to set up your payment details so OnBuy can pay you for completed sales. Navigate to the payment settings section in your Seller Centre dashboard and enter your bank account details. OnBuy processes seller payments on a regular schedule, typically bi-weekly, directly into your nominated bank account. Make sure your bank details are correct to avoid payment delays. OnBuy uses secure payment processing to protect both your financial information and your buyers'' transactions. ## Step 4: Set Up Your API Credentials If you plan to use third-party tools such as repricing software, inventory management systems, or multi-channel listing tools, you will need to generate API credentials. In the Seller Centre, navigate to the API settings section and create a new set of API keys. You will receive a seller ID, an API key, and a secret key. Store these credentials securely, as they provide programmatic access to your seller account. Tools like [Re-Pricer](https://re-pricer.com) use these API credentials to connect to your account, monitor your listings, and adjust prices automatically based on your configured rules. Never share your API credentials publicly or with untrusted services. If you suspect your keys have been compromised, regenerate them immediately from the Seller Centre. ## Step 5: Configure Your Delivery Settings Before listing products, set up your delivery options. OnBuy allows you to define multiple delivery methods including standard, express, and next-day shipping. For each method, specify the delivery timeframe and the cost to the buyer (or set it as free delivery if you prefer to absorb shipping costs into your product price). Realistic delivery windows are important. OnBuy monitors your dispatch performance, and consistently missing your stated delivery times will negatively impact your seller metrics. Set windows you can reliably meet, even during busy periods. ## Step 6: List Your First Product With your account verified, payments configured, and delivery settings in place, you are ready to list your first product. OnBuy uses a catalogue system, so start by searching for your product in the existing catalogue. If it exists, you simply attach your offer with your price, stock quantity, condition, and delivery details. If your product is not in the catalogue, you can create a new listing from scratch. Provide a clear, keyword-rich title, detailed description, high-quality images, and accurate product attributes. A well-crafted listing improves your visibility in search results and your conversion rate with buyers. ## Next Steps After Setup Once your first listing is live, consider these steps to accelerate your growth on OnBuy: - **Expand your catalogue** by listing more products. OnBuy charges no listing fees, so there is no cost to broadening your range. - **Set up automated repricing** with a tool like [Re-Pricer](https://re-pricer.com) to stay competitive without manual price monitoring. - **Monitor your seller metrics** in the Seller Centre and address any issues promptly to maintain strong buy box eligibility. - **Explore bulk listing tools** if you have a large inventory to upload products efficiently via CSV or integration. Setting up your OnBuy seller account takes less than an hour, and most sellers are fully operational within a few days of completing verification. The platform rewards sellers who invest in accurate listings, competitive pricing, and reliable fulfilment.