The major goal of this research was to see how budget assessment affected Nigeria's economic progress. The inspiration stemmed from a number of inconsistencies in the Nigerian economy's budget preparation and execution. This study employed an ex-post-facto design, with data gathered from the Central Bank Statistical Bulletin and the Federal Ministry of Finance for analysis. A model based on empirical and theoretical reviews was developed to attain this wide purpose. The model's dependent variable was the Human Development Index (HDI), while the model's independent variables were the government's capital budget, recurrent budget, and yearly budget implementation rate. To evaluate data, the researchers used the Ordinary Least Squares (OLS) Model. Budget assessment had a favorable and considerable influence on Nigeria's economic progress, according to the inferential findings. According to the report, Nigeria's government should make an effort to raise capital and recurring expenditures in its yearly budget, since both have a substantial influence on economic development. Finally, the government should make an effort to put in place effective budget monitoring and assessment equipment that will increase the rate of budget implementation while simultaneously ensuring strict adherence to due process.