This study aims to examine the influence of dividend payout ratio, financial leverage, audit quality and firm size to income smoothing. Dependent variable in this research is income smoothing. The population in this study is a manufacturing company listed on the Indonesia Stock Exchange in 2012-2015. This study looked at the financial statements published by the manufacturing company during the study period. The method of determining the sample is done by using purposive sampling to ensure the data obtained in accordance with the criteria in the study. From purposive sampling, obtained the number of manufacturing companies observed as many as 31 companies. The results of this study indicate that partially firm size affects income smoothing, but dividend payout ratio, financial leverage and audit quality partially have no effect on income smoothing. While simultaneously dividend payout ratio, financial leverage, audit quality and company size influence to income smoothing.