Cashback appears in an account within hours and then sits pending for months. The delay is structural, and it follows from who holds the money at each stage.
The money has not been earned yet
A cashback portal is paid a commission by the retailer for a completed sale. A sale is not complete while the customer can still send the goods back.
Return windows commonly run for weeks, and some categories allow longer. Until that window shuts the retailer cannot know whether the transaction stands.
Paying the shopper before that point would mean paying out on sales that later reverse, with no practical way of recovering the money afterwards.
The chain has more links than it appears
Most retailers do not work with each portal directly. An affiliate network sits between them, handling tracking, validation and payment for hundreds of merchants at once.
Each link adds a settlement cycle. The retailer validates on its own schedule, pays the network on invoice terms, and the network pays the portal after that.
None of those cycles are aligned. A sale validated at the end of one month can easily miss the following payment run and wait for the next.
Validation is a real process
Retailers check that transactions were genuinely referred, that vouchers used were permitted, and that the order was not cancelled, returned or paid for fraudulently.
Some of this is automated and some is manual. Categories with high fraud exposure, such as travel and financial products, are examined more closely and take longer.
Financial products stretch furthest because commission may depend on the account still being open after a qualifying period that runs for months rather than weeks.
Why the pending amount can change
The tracked figure is an estimate based on the order value at the moment of click-through. It is not a commitment, and the final amount is calculated later.
Partial returns, delivery charges, taxes and excluded product categories are stripped out during validation, so a rate applied to the basket total will overstate the result.
Portals hold their own reserve as well. The rate advertised to the shopper is a share of the commission, not the whole of it.
What happens when it stalls entirely
A claim raised with the portal is passed up the same chain and can only move at the speed of the retailer's response, which is why resolutions take weeks.
Evidence matters more than persistence. Order confirmations, timestamps and the referring click are what the network can act on, and screenshots of a basket are not.
Because the portal is not holding the money, it cannot simply decide to pay. Its position in the chain determines both the delay and the limits of what it can do.