Ontario Tax Credit

...deductible from Ontario Tax Payable

75% of the first $300
50% of the next $700
33.33% of the next $1275

The maximum allowable credit is $1000.00

For example:

A contribution of $500 will cost you $175
A contribution of $300 will cost you $ 75

If the total of tax credits exceeds the Ontario tax payable the amount is refundable.