子供がいる場合は、最低限、人数に応じたLICO(Low Income Cutoff)以上の収入が必要です。3人家族の場合、$29,944が最低年収となります。
Sponsors must show they have the minimum necessary income (LICO) to support the sponsored persons as well as their family members in Canada or those already sponsored. http://www.cic.gc.ca/manuals-guides/english/ip/ip02e.pdf,p.50