Most developing countries have been faced problem of increasing tax revenue as theyrnneed to cover expenditure. Since Ethiopian is one part of developing country, patternrnof tax revenues and economic growth across countries has become a significantrnconcern to it. This study so investigated the determinants of tax revenue performancernin Ethiopian federal government by using time series data from 1992-2013.Thernvariable used were Foreign direct investment, public debt, openness ,foreign aidrn,inflation and gross domestic product. The study has employed both descriptive andrntime series regression method as well as Eviews software for analysis purpose. Alsornpost positivism research approach has been used. The trend of tax collection inrnEthiopia is inconsistent, changing upward and downward depending upon economicrnconditions. However, in recent years it shows an incremental in total tax collectionrnbut performance of tax collection is decreasing from year to year. As an example, taxrnrevenue was increased staring from 2003, because tax base was added as the form ofrnVAT and also GDP was the main contributor since it has been rapidly increased. Thernstudy made diagnostic tests to assess the fitness of the model. The study reveals thatrngrowth domestic product, public debt foreign direct investment, and openness, havernsignificant positive relationship with tax revenue performance. But, foreign aid isrnnegatively related to tax revenue performance. The study also providesrnrecommendations that will be solve this problem and added tax revenue performance.rnPolicy implication has been stated in this study for example government should adjustrnits fiscal policy and investment area should be selected based on their benefit forrncountry.rnKey words:Tax revenue: Determinants of tax: Time Series analysis: Ethiopia FederalrnGovernment