Abstract The purpose of the performed and presented financial analyzes, in the case of the two units, does not allow major discrepancies between the estimated and achieved situation. The authors have based the research on the technical-economic and financial analysis of investments, which sets economic efficiency and investments viability and assumes forecast of revenue, expenses, profit and loss account, balance sheet and cash flow: a) static analysis of indicators; b) dynamic analysis of indicators, c) cost-benefit analysis. Analysis of economic efficiency and sustainability of investments aimes at both static indicators of investment analysis and dynamic analysis of economic efficiency. The goal of research was to improve analyzes and economic indicators for assessing the effectiveness and sustainability of investments and the objectives targeted technical and economic analysis, solvency and viability of investments and the impact of the investment on key indicators of economic and financial technical analysis. Case studies, carried out at S.C. NORD INTERMED CONSULTING GROUP S.R.L. Dorneşti, Suceava county and S.C. ANDIMIR TOP S.R.L. Mihălăşeni, Botoşani county, led to a series of measures to improve the financial analysis of economic efficiency and sustainability of investments.