Important facts
The PAD service allows taxpayers registered in My Account to authorize the CRA to withdraw from their Canadian financial institution a pre-determined amount on a pre-determined date.

If you are already a My Account user, go to your account on the CRA website. Setting up a PAD agreement will be offered as an option upon login.
During set-up, you can:
specify the amount of the withdrawal;
set the date or recurring dates when the withdrawal(s) are to be made; and
indicate the bank account you’d like to use to make the payment(s).
Notes

To set up a PAD, you must first register in My Account. Please allow 5 to 10 business days for your security code to arrive in the mail. You will need this code to complete the registration.

To avoid interest or late-payment charges, make sure to set up your PAD at least five business days before the deadline for any balance owing or arrears.

Once your PAD is created, you will be provided with an online confirmation letter that can be saved or printed.
You can modify or cancel your PAD online up to five business days before your payment due date.
The PAD service is one of many online payment options available to taxpayers. It’s a great way to pay recurring payments such as instalment payments. Signing up for the PAD service is easy, convenient, and secure. Set it up and forget it.