LTV or Loan-To-Value ratio is the maximum amount of exposure that a lender is willing to accept in financing your purchase. Lenders are usually prepared to lend a higher percentage of the value, even up to 100%, to creditworthy borrowers. Another consideration in approving the maximum amount of loan for a particular borrower is the ratio of monthly debt payments (such as auto and personal loans) to income. Rule of thumb states that your monthly mortgage payments should not exceed 1/3 of your gross monthly income. Therefore, borrowers with high debt-to-income ratio need to pay a higher down payment in order to qualify for a lower LTV ratio.