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 range( Y/ {, W, M3 N7 G8 ^) S
from 35% to 42% of gross income. 5 S( U3 X" C; I J6 T1 I7 JGDSR(gross debt service ratio)=(payment of principal and interest on mortgage+property taxes+heating costs+50% of condominium fees)/gross income.