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 ; g; e+ a+ W& V6 }7 I( `8 H0 A' gfrom 35% to 42% of gross income.$ F3 L4 e5 U, ^ M4 r' a
GDSR(gross debt service ratio)=(payment of principal and interest on mortgage+property taxes+heating costs+50% of condominium fees)/gross income.