When a person decides to purchase a house with the help of a home loan, there are many factors that influence whether you will get the loan or not and there are certain factors that influence how much loan you will get and the RBI guidelines for home loan interest rate at which you will buy your home.

A home loan is a long-term loan, so the tenor of the loan is usually between 20 years to 30 years. But, the tenor of the home loan will be dependent upon certain factors, such as:
Age- Age is one of the major factors, while selecting the right home loan tenor. If you are a young professional, you are likely to get a longer tenor because more working years are left and the chances of becoming a loan defaulter is less. The older you are, the less working years you are left with, so more chances of becoming loan defaulter. So, older people get lesser home loan duration. When people are in your 50s or 60s, they do not get alternatives, hence they choose a smaller loan duration.

Income- If you have higher income, you will be able to opt for shorter home loan tenor. Even if you have existing debts, you will be able to handle the higher EMI with your higher income.

Another factor is the interest rate of the home loan. To know that in details, read: http://www.stillbonarticles.com/3-factors-that-can-help-you-decide-home-loan-tenor/