Is it a surprise that for lower income families, renting actually is cheaper than buying? The table below is based on buyers in the 15% tax bracket.
The abstract of the Congressional Budget Office (CBO) study:
This paper illustrates how the different tax treatments of owner-occupied and rented houses affect the relative costs of owning and renting. In the examples, a representative landlord computes the rental rate (the ratio of the rent to the value of the house) required to break even on an investment in a house. Potential homeowners compare that market rental rate as a tenant with an implicit rental rate that reflects the cost of owning a home.
The tax advantages tend to make owning more advantageous than renting for higher-income households, but lower-income households can find renting cheaper than owning. The paper also illustrates how limiting or eliminating certain tax advantages would change the cost of owning relative to renting. While the precise comparisons are specific to the conditions detailed in the examples, their general implications are broadly applicable.
Read the entire study.