Published: May 2006
Content last reviewed: January 2015
ISBN: 1-4249-1553-8 (HTML)
Effective July 1, 2006, Ontario is changing the method of calculating the interest rate to be paid on overpayments of tax (i.e., refunds and surplus instalments).
The rate used to calculate interest paid on overpayments of tax and certain electricity charges (i.e., Debt Retirement Charge and Gross Revenue Charge) will be changed from the base rate minus 2 per cent to the base rate minus 3 per cent.
There will be no changes to the method of calculating the interest rate to be charged on tax shortfalls.That method is the base rate plus 3 per cent.
The method of calculating the interest rate to be paid on tax refunded following a successful objection or appeal will remain unchanged. That rate is the base rate.
For the base rate, Ontario will continue to use the mean, rounded to the nearest whole percentage, of the prime rates of the Royal Bank of Canada, Bank of Nova Scotia, Canadian Imperial Bank of Commerce, Bank of Montreal, and TD Canada Trust.
A base rate of interest is established by Ontario quarterly on January 1, April 1, July 1 and October 1 of each year. It is based on the calculated mean rate on the 15th day of the first month of the previous quarter. For example, the base rate of interest on July 1, 2006 will be the mean of the prime rates of the listed banks on April 15, 2006.
Regulations have been filed that establish the new method of calculating the interest rate to be paid as of July 1, 2006.
Interest paid on tax overpayments and certain electricity charges cited above that arose before July 1, 2006 will be calculated in accordance with the previous method, being the base rate minus 2 per cent, for the portion accrued prior to July 1, 2006.
The following statutes are affected by this measure:
Corporations Tax Act
Electricity Act, 1998 - certain electricity charges
Employer Health Tax Act
Fuel Tax Act
Gasoline Tax Act
Income Tax Act (Ontario) - Ontario administered programs only
Land Transfer Tax Act
Mining Tax Act
Race Tracks Tax Act
Retail Sales Tax Act
Tobacco Tax Act
Please contact the Ministry of Finance at 1 866 ONT-TAXS (1 866 668-8297), 1 800 263-7776 for teletypewriter (TTY), or visit our website at ontario.ca/finance.