Available balance vs actual balance.
If you look at your accounts on internet banking, you’ll notice each account shows two amounts: ‘balance’ and ‘available’.
Here’s what they mean:
Why the difference?
Whenever you use a card to pay for something on your account, the money will be instantly put aside for the transaction – but it’s not actually sent to the seller until later, when they put in a claim for it. They can take up to 10 days to do this, but normally it's only 1 or 2.
Long story short: any difference between the ‘balance’ and ‘available’ amounts represents money you’ve already spent. Hasta la vista, baby.