When do I have to pay GST instalments?

If your business owed more than $3,000 in GST, you need to make instalments.

If your business owed more than $3,000 in GST, you will need to make instalments. Take the amount you owed last year and divide into quarterly payments (e.g. If you owed $8,000 in 2018, pay $2,000 quarterly during 2019). 

If you think you’ll owe less GST this year, you can calculate your GST instalments based on your best guess for the current year. However, if you underpay, you will owe interest on the underpaid amount. 

Your instalments are due within one month of the end of each quarter. If you have a June 30 year-end, your first quarter would be July 1 to Sept 30, and your GST instalment would be due October 31.