Low Income Thresholds 2017

The following applies to all provinces except Quebec.

Size of Family UnitMinimum necessary income
1 person$24,949
2 persons$31,061
3 persons$38,185
4 persons$46,362
5 persons$52,583
6 persons$59,304
7 persons$66,027
More than 7 persons, for each additional person, add$6,723

Source
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5482-instruction-fill-financial-evaluation-form-1283.html#tb-1