This study investigates the relationship between immigration and GDP/capita in Sweden for the period 1993-2015. This period is chosen because of limitations of data and to include the recent refugee flows in Sweden. The analysis is based on a decomposition framework of GDP/capita. This study contains two empirical investigations; First, an analysis of the contributions of foreign citizens to the Swedish GDP/capita derived from the participation rate. Second, an analysis of which underlying factor(s) of GDP/capita that had an effect from immigration. The result states that an increase in the participation rate for foreign citizens will help to increase the growth of Sweden’s GDP/capita. The result further suggests that there exists no direct effect from immigration on Sweden’s GDP/capita. It also shows that the overall participation rate has a negative correlation with immigration, but no significance when investigation the participation rate with other explanatory factors from GDP/capita. The conclusion must therefore be that any negative effect that immigration has on the participation rate will be weakened or canceled out from possible positive effects in the output-capital ratio, capital intensity rate or the employment rate.