eBay transaction defect rate: what counts as a defect and how to bring it down

What is the eBay transaction defect rate?

The eBay transaction defect rate is the percentage of your orders in the evaluation window that went wrong in a way eBay blames on the seller. eBay calls each of those orders a transaction defect. It is the main number in eBay's seller performance standards, and it decides whether you are Top Rated, Above Standard or Below Standard.

The formula is simple: defective transactions divided by total transactions in the window. What makes it tricky is that a few defects can move the rate a long way when your volume is low, and that the window can be as long as a year.

Which orders count as a transaction defect?

On eBay UK, two kinds of problem create a defect. They are listed on eBay's seller performance policy page.

• Seller cancellations for being out of stock. If a buyer pays and you cancel because you cannot supply the item, that order is a defect. eBay's order cancellation policy says so plainly.
• Cases closed without seller resolution. A buyer opens an item not received or not as described request, you do not resolve it, the buyer asks eBay to step in and eBay finds in the buyer's favour. That order is a defect.

Late deliveries are measured separately as the late delivery rate. Negative feedback and low detailed seller ratings do not count as defects under the current standards, though buyers still see them.

One order can only be one defect. If the same sale is cancelled and also produces a case, it still counts once.

Which cancellations do not count as defects?

Not every cancelled order hurts you. The difference is who started it and why. A cancellation is only a defect when it is the seller's failure to supply what was sold.

• The buyer asks to cancel. Buyers can request a cancellation from their purchase history, or message you to ask. If you accept that request through eBay's cancellation process, it is not a defect.
• The buyer never paid. An unpaid order closed through eBay's unpaid item process is not a defect for the seller.
• There is a problem with the buyer's address. If you cannot post because the address is incomplete or undeliverable, eBay offers a separate reason for that situation. Use it only when it is true.

What matters is that the reason you select is the real one. eBay treats a full refund made outside its own systems, for example by sending money back through another payment route instead of cancelling, in the same way as an out of stock cancellation. It also treats a misleading reason as a breach of its rules, which can bring far bigger trouble than one defect. If you are tempted to pick a different reason, the honest fix is to stop the stock problem from happening again.

The practical habit is to talk to the buyer before you cancel. Explain the problem, offer an alternative if you have one, and let the buyer decide. Some buyers will wait a few more days; some will choose a similar item; some will ask to cancel themselves. Whatever they choose, write it down in the eBay message thread so there is a record.

What are the defect rate limits on eBay UK?

eBay evaluates on the 20th of each month. It uses the last 3 months if you had more than 400 transactions, otherwise the last 12 months.

A worked example of the defect rate

Example, with hypothetical numbers. Seller A has 300 transactions in the last 12 months. The 12 month window applies because that is fewer than 400.

1. Seller A cancelled 5 orders because the supplier ran out of stock, each to a different buyer.
2. One item not received case was closed by eBay in the buyer's favour.
3. Total defects: 6. Rate: 6 divided by 300 is 2%.

At exactly 2%, Seller A is still within the Above Standard limit. One more out of stock cancellation would give 7 defects out of 301 transactions, about 2.3%, from 7 different buyers. That is over 2% and more than 4 buyers, so Seller A would be Below Standard at the next evaluation.

Seller B has 2,000 transactions in the last 3 months. 2% of 2,000 is 40, so Seller B has far more room in absolute terms, but a single supplier failure that cancels 50 orders in one week would still push the rate over the limit.

Why is my eBay transaction defect rate too high?

When the rate climbs, the defect report on the seller dashboard usually shows one of four patterns.

Stock that was never really available

The most common cause is listing a quantity you cannot supply. This happens when stock is shared across channels, when a supplier's stock moves faster than your listings, or when a listing was copied with a high default quantity.

Prices that changed after the sale

If the cost of the item rises after the buyer pays, some sellers cancel rather than sell at a loss. eBay still records the cancellation as out of stock if you choose that reason, so it is a defect.

Cases left too long

Under the eBay Money Back Guarantee, sellers must respond within 3 business days. After that the buyer can ask eBay to step in. Many closed cases come from messages that sat unread over a weekend.

Parcels with no proof

An item not received case is hard to win without valid tracking that shows delivery. Without it, eBay will usually side with the buyer.

How do you lower a transaction defect rate?

You cannot delete a recorded defect, but you can stop new ones and dilute old ones with clean sales.

1. Download the defect report. Group the defects by product, supplier and reason. A single product often explains most of them.
2. Fix stock at the source. Set quantities to what you can supply this week. When a supplier is out of stock, set the eBay quantity to 0 rather than ending and relisting.
3. Never pick a false reason. Choosing buyer request when the buyer did not ask is against eBay's rules and can lead to wider action on the account. If you cannot supply, ask the buyer whether they would accept a cancellation, and only use the buyer request reason if they actually request it.
4. Answer cases the same day. Offer a refund, replacement or return before the 3 business day deadline.
5. Appeal what was not your fault. Defects caused by carrier failures, eBay system issues or buyers breaking the rules can be appealed through Seller Help.
6. Keep selling cleanly. Every order without a problem lowers the rate a little, and old defects age out of the window.

Sellers who source from Amazon carry extra stock risk, and should also read eBay's drop shipping policy. Dropshipping from a wholesale supplier is allowed; buying the item from another retailer or marketplace that ships directly to your buyer is not. Whatever your source, you are responsible for safe delivery within the time in your listing and for the buyer's satisfaction.

How do you appeal a transaction defect?

eBay will look again at a defect when the cause was outside your control. The usual grounds are a carrier that lost or delayed a parcel despite a timely scan, an eBay system problem, a buyer who misused the case process, or events such as severe weather that eBay recognises. The route is through Seller Help in your account, and eBay lists the situations it considers on its seller performance pages.

A good appeal is short and factual. Give the order number, say what happened in one or two sentences, and attach or reference the proof: the tracking page with scan dates, the message thread, or the carrier's reply. Do not appeal every defect as a matter of habit. Appeals that fit eBay's grounds are worth making; appeals that simply disagree with the outcome rarely succeed and take time you could spend preventing the next one.

While an appeal is open, plan as if it will fail. Keep working out how much room you have left in the window, and act on the root cause straight away.

What to do next

• Check your current rate and projected level in Seller Hub today.
• Work out how many more defects your window can take before you cross 2%.
• Set every listing with doubtful stock to a quantity you can supply.
• Turn on notifications for returns and cases so none waits more than a day.
• Read our guide to eBay seller performance standards in the UK for the other two metrics.

If stock changes faster than you can check by hand, a tool that reads supplier stock and sets the eBay quantity to 0 when an item is unavailable takes the most common defect off the table. See how Dropizon's stock guard works.