Canadian tax instalments?

[SafetyinNumbers]

I figure a lot of people on this board make tax instalments or are CA/CPAs so please share your view.

 

I have paid instalments for the past few years and historically it has worked out so that I have a small amount owing or a decent sized refund. This year (knock on wood), I'm looking at a payable more than twice my instalment and I'm wondering if there is any advantage to topping up my December instalment or will my future required instalments be unaffected if I do so?

[scorpioncapital]

In the following year, your installment will be higher but you can switch to the estimated actual amount owing and ignore the installment calculated.

 

[SafetyinNumbers]

Thanks Scorpion. I wish I could predict my yearly capital gains ahead of time!