Succeeding the specified economic targets of national economies, productive investments and their financing are critical. In this sense, savings can be considered as catalyst for investments. Taking this mission into account, the determinants of savings raise a great concern. In this framework, the main objective of this study is to estimate the effects of macroeconomic variables on saving types for the 21 OECD countries during the 2006-2015 period by using Dynamic Ordinary Least Squares Mean Group (DOLSMG) panel cointegration method. Per capita income, short-term real interest rates and the inflation decrease private savings but the liquidity increases private savings. Inflation increases public savings; on the other hand, growth rate, per capita income, short term real interest rates and liquidity decrease public savings. The growth rate and liquidity increase national savings while per capita income, short-term real interest rates, and inflation decrease national savings. The findings in the study indicate that negative relationship between the growth rate and the public savings supports the Permanent Income Hypothesis while positive relationship between the growth rate and national savings supports the Life-Cycle Income Hypothesis. However, our analysis displays that the real interest rates influence savings negatively and this implies that the income effect exceeds the substitution effect.