There are many approaches to measuring housing affordability. The approaches are Price to Income Ratio (PIR), Rent to Income Ratio (RIR), Housing Expenditure to Income Ratio, Market Basket Measure, Quality Based Measure, and Residual Income Measure. The price Income Ratio (PIR) is often used as an indicator of measuring housing affordability. The objective of this research is to examine housing affordability in Pulau Pinang by using the Price to Income Ratio (PIR) approach. The sample of this research comprises individuals who own a low-cost house at Pulau Pinang. The convenience sampling technique is used for this research with the regression method as its analytical tool. The findings indicate that Price to Income Ratio (PIR) is a valid and easy approach to measure housing affordability in Pulau Pinang.