The main reason for an annulled consumer proposal is a 3-month payment delay. If this happens, your proposal will be automatically annulled under the Bankruptcy and Insolvency Act. A consumer proposal can also be annulled if the court issues an annulment order, which is very rare.
When your consumer proposal is annulled, you will immediately lose the money that has already been sent to your creditors. Any debts that were partially repaid during the proposal period will no longer be taken into account, and you will have to start over from scratch.
All the interest, bills, and penalties that were included in the proposal will come back as if you had never filed one. Additionally, the annulment of the proposal affects your credit report and will remain on your record for 6 years.