TDSR(Total debt service ratio)=(payment of principal and interest on mortgage+property tax +heating costs+50% of condominium fees+payments on other personal loan)/grss income. TDSR guidelines Currently range6 Z$ f4 g% q9 p; V$ p# g) [
from 35% to 42% of gross income. 6 ?" @3 T$ }. Z5 X' }GDSR(gross debt service ratio)=(payment of principal and interest on mortgage+property taxes+heating costs+50% of condominium fees)/gross income.