The two other key determinants of mortgages – the loan-to-value (LTV) and debt-to-income (DTI) ratios – remain the same. The maximum LTV ratio, which is the ratio of a loan to the value of the purchased property, will stay at 80 percent. The limit of the DTI ratio, which is an applicant's total debt value expressed in multiples of their net annual income, will stay at 8.5 (or 9.5 for under-36-year-olds).