Hi @Lee_Atkinson
The way I would do this is to separate the cashback from the sales themselves, which would then exclude them from your income. Then you would tag the cashback as a transfer from petty cash to your merchant account.
Let me give an example, let’s say we have the following:
- Daily sales total £9,000 + VAT (£10,800)
- Daily cashback requests total £200.00
- My till had a float of £500.00, but £200.00 of this has been paid out in cashback
I have my invoice, as normal for my sales

For simplicity, let’s assume I took all payments by card, so this would go straight to my merchant holding account. I’m using a Square holding account in this scenario, but this could be anything, the name is just an example.

That’s the invoice paid, so now let’s take care of the cashback element.
In the merchant account I would now have the income from the daily sales (because I marked the invoice as paid). So now, I need to add in the cashback.
This creates a new untagged entry, which can simply be tagged as a transfer from your petty cash account.
This increases the income in your merchant account by £200.00 and decreases the balance in your petty cash account by the same amount. My petty cash account now looks like this:
The fees for the card merchant and the payout would just be treated like any other merchant account.
In summary, you have two transactions - one for the transfer to your current account (the payout), plus another transaction for the merchant fees.
Let’s assume the merchant take £50.00 in fees, with the balance of £10,950 being paid to my current account.
As @ian_roberts mentions, you tag the fee to a purchase invoice. The final transfer out is just tagged as a transfer to your current account (which should then also marry up with your bank statement).
However, I’m just thinking out loud here, so there may be an easier way. I’m not an accountant nor bookkeeper, so it may be worth clarifying this with them too.
Hope that helps!