In any crisis or uncertain situation, it is necessary to carefully decide about three main points: when, what to invest, and which financial sources will be used. A profit reinvestment would be an effective and safe way of circulating money flows in a company. The first wave of COVID-19 has changed business conditions not only in the Czech Republic, but also it has an influence on financial decisions of entrepreneurs on how to use financial resources in individual segments of the company. The main goal of this chapter is to compare the reinvestment behavior in the company before the crisis based on primary research data (at least 425 respondents). The chapter includes results of different preferences influenced by COVID-19 uncertainty, and factor analysis has shown that availability of internal resources was important to survive restrictions and to be able to continue in financial planning to sustainably develop the business. Unfortunately, the relationship between business experience and main motives to invest wasn't confirmed.