Installment payments should be made based on the expected taxes owing. If the taxes owing are larger than what you expected them to be, and you were paying installments based on the expected amount, then you will be charged with installment interest (and if the interest is more than $1,000, penalties can be charged as well).
The information provided on this page is intended to provide general information. The information does not take into account your personal situation and is not intended to be used without consultation from accounting and financial professionals. Allan Madan and Madan Chartered Accountant will not be held liable for any problems that arise from the usage of the information provided on this page.