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 6 F& y$ ?' w/ \. H* ufrom 35% to 42% of gross income.7 }/ T/ C' n" R7 w1 k! [3 X% k. a
GDSR(gross debt service ratio)=(payment of principal and interest on mortgage+property taxes+heating costs+50% of condominium fees)/gross income.