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 range2 A9 `7 S# S5 n' S2 _$ p& Y
from 35% to 42% of gross income.! O# Q/ }2 f0 ]* X; c W0 D
GDSR(gross debt service ratio)=(payment of principal and interest on mortgage+property taxes+heating costs+50% of condominium fees)/gross income.