When do I have to pay corporate tax instalments?

When your corporation owes more than $3,000 in taxes.

If your corporation owed more than $3,000 last year, you will be required to make quarterly instalments this year. Take the amount you owed last year, and divide it by 4, and pay that amount each quarter. The CRA may require you to make monthly instalments if you have a less-than-stellar compliance history.

Corporate tax instalments are due at the end of each month or quarterly.