Offer closes on Tuesday, 8 August 2023 (5.00pm Sydney time).
I'm not sure about bank transfer times.
But if you pay via BPAY (at least with Commbank), you can pay on the 8th (so long as it's before your banks processing cut-off time and obviously before the Entitlement closing time of 5:00pm). The payment will be acknowledged as having been made on the 8th by the Biller (even though the payment will not be processed until the next business day).
It might be different for other banks. I'm not sure. I suggest you contact your bank (the one you will be transferring the funds from) and ask them directly about it. But so long as the funds are received by the 5:00pm on the 8th, you'll make the cut-off.
Below is what Commbank says about how long it takes for BPAY funds to be received by a Biller:
If your payment is made on a bank business day before 6pm (Sydney / Melbourne time) it will be debited from your account instantly and processed that day. The biller will acknowledge the payment as having been made that day and should process the payment the next banking business day.
If you make a payment on a weekend or public holiday, or after 6pm (Sydney / Melbourne time) Monday to Friday, the payment will be debited from your account instantly and processed the next business day. The biller will acknowledge the payment as having been made on the next banking business day (this does not include weekends or public holidays).
The information I've provided is only certain for Commbank. If you're with another bank, you'll need to check with them about transfer times.
The info I've provided is in good faith and to the best of my knowledge. It's not financial advice and I accept no responsibility or liability for any errors/inaccuracies. You need to check directly with your bank about transfer times and act accordingly.
Also, don't forget to sort out your transfer/BPAY limits beforehand to avoid unpleasant last-minute surprises that could cause delays.
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