Selling Profit Calculator UK

How to Calculate Reselling Profit

Knowing your true profit on every item is what separates successful resellers from those who think they are making money but are not. The formula is straightforward, but most sellers forget to account for all the costs:

Item cost is what you paid for the item, whether that is a charity shop find, a car boot purchase, wholesale bulk buy, or a clearance deal. If you got it for free (gifted, found, or from your own home), enter £0.

Marketplace fees are the biggest hidden cost for new sellers. eBay charges around 15.7% in combined fees. Etsy charges around 10.7%. Gumtree and Facebook Marketplace charge zero fees on most local transactions. This difference dramatically affects your bottom line, especially on lower-margin items.

Shipping costs should include your actual postage cost, packaging materials, and any insurance or tracking you add. Even if you charge the buyer for shipping, your actual shipping cost still reduces your profit.

Other costs cover everything else: cleaning supplies, repair materials, petrol for sourcing trips, storage costs, and packaging materials. Many resellers track these as monthly overheads rather than per-item, but accounting for them per item gives you the most accurate profit figure.

Marketplace Fees Compared: eBay vs Gumtree vs Facebook vs Etsy

Each UK marketplace has a fundamentally different fee model. Understanding these differences is crucial for choosing where to list each item:

*eBay listing fee is free within 1,000 listings/month. Facebook fees are for local collection (most common UK use). Etsy rate excludes 15% offsite ads fee.

The takeaway is clear: the marketplace you choose directly determines your profit. A £100 item sold on Gumtree earns you £100. The same item on eBay earns you roughly £84. That £16 difference multiplied across dozens of items per month is the difference between a hobby and a business.

But here is the nuance: eBay and Etsy charge higher fees because they provide more reach. eBay has 23 million active buyers in the UK. Gumtree has excellent local traffic but less reach for niche items. The smartest sellers list on all platforms simultaneously so the first buyer to come along gets the item, regardless of which platform they are on.

Why Smart Sellers Cross-List

Cross-listing means putting the same item on multiple marketplaces at the same time. When it sells on one, you remove it from the others. The benefits are significant:

1. Faster sales: More eyeballs means faster sell-through. An item visible to eBay's 23 million UK users plus Gumtree's millions of local searchers plus Facebook's massive audience sells faster than being on just one platform.
2. Fee arbitrage: If a local buyer on Gumtree grabs your item before an eBay buyer, you save the entire 15.7% in eBay fees. Even if it sells on eBay, you have not lost anything by also listing on Gumtree.
3. Risk reduction: Platform outages, algorithm changes, or account restrictions on one marketplace do not stop your sales if you are on four platforms.
4. Better price discovery: Different audiences value items differently. A vintage lamp might fetch £30 on Gumtree but £60 on Etsy. Cross-listing helps you find the best price.

The traditional problem with cross-listing is time. Manually listing on 4 platforms takes 30-60 minutes per item. That is where SyncSellr comes in. Create the listing once in our dashboard, select your marketplaces, and publish everywhere with one click. When the item sells on any platform, SyncSellr automatically delists it from all the others. No overselling, no manual tracking.

Most SyncSellr users find that 20-40% of their items sell on free platforms (Gumtree or Facebook) rather than eBay. On an average monthly turnover of £2,000, that saves roughly £60-125 in marketplace fees — which more than covers the £29.99/month SyncSellr subscription.

Frequently Asked Questions