Many country and state governments are providing financial incentives for energy efficiency projects in the form of tax credits. Building the value of these credits into your financial analysis can help you to win approval for your projects. However, our financial analysis is only as good as the data that we put in. There are some common pitfalls that we should take care to avoid. This course helps to illustrate why including elements such as marginal cost and blended rates are essential when calculating savings. We will use Excel to construct cash flow, internal rate of return, net present value, and annual return.