The study examined the effect of tax revenue on government budget implementation in Nigeria. Specifically, the study sought to find the effect of company income tax proceeds, petroleum profit tax proceeds and value added tax proceeds on government budget implementation proxied by government total expenditure in Nigeria. The study adopted ex-post facto research design which enabled time series data to be collected from the annual statistical bulletins of Central Bank of Nigeria and Federal Inland Revenue Service for the period of 25years (1999 to 2023). The study employed descriptive statistics to determine the individual characteristics of the model variables. Ordinary Least Square (OLS) Regression Analysis was conducted to estimate the empirical relationship between the components of tax revenue employed in this study and government budget implementation at 5% level of significance. The results of the OLS multiple regression analysis indicated that all the variables, company income tax proceeds, petroleum profit tax proceeds and value added tax proceeds have positive and significant effect on government budget implementation in Nigeria. The implication of the results is that tax revenue has not significantly contributed in the government total spendings for the years reviewed. The study therefore recommended that government should transparently and prudently account for the revenue generated through taxation by using it to develop other sectors of the economy such as solid minerals and Agriculture which would help to improve the well being of the citizenry.