The average monthly remittance for a year is determined by dividing the total of the amounts to be remitted as income tax withheld from remuneration paid as an employer or as a payer, QPP contributions, QPIP premiums and the contribution to the health services fund by the number of months in the year (maximum of 12) for which the amounts were remitted.

A corporation's average monthly remittance is equal to:

• the total of the corporation's average monthly remittance and the average monthly remittance of every associated corporation, where the remittance is determined on the basis of the 2022 taxation year;
• the corporation's average monthly remittance, where the remittance is determined on the basis of the 2023 taxation year.

Income tax withheld from an income-averaging annuity for artists is not included in the calculation of the average monthly remittance.