Diocesan priests in the Latin church make solemn promises when they are ordained a deacon the year before they are ordained priests.
These promises are to live a celibate (unmarried) life, to respect and obey the bishop and his successors, and to be faithful in praying the Divine Office (Liturgy of the Hours or Breviary). When he is ordained a priest, he is again asked to promise celibacy.
Consecrated Religious priests (e.g., Dominicans, Franciscans, Benedictines, Augustinians, Jesuits, Carmelites) do take solemn vows of poverty, chastity, and obedience. These are called the Evangelical Counsels. Religious men and women (brothers and sisters, monks and nuns) take a vow of poverty which means they do not own any personal property.
They have no credit card in their name, no bank account, no checking or savings account, and no ATM card. They do not own a car or home. They earn no salary and pay no taxes. Everything they use is owned and shared by the community. If they inherit something or somebody gives them a gift, it does not belong to them individually; instead, it belongs to the religious community they are a part of. The superior of the house (the person elected or appointed to be in charge of the community that lives together under one roof) gives the brothers and sisters money to buy necessities like underwear, toiletries, shoes, socks, medicine, and food. Religious priests who take a vow of poverty do get a very modest monthly allowance ($50-$100) for necessities so they do not have to bother the superior for every little thing.
Diocesan priests do not take the vow of poverty as they typically live alone or with only one other priest in a rectory, whereas religious priests live together in communities as small as five to ten or as large as twenty, fifty, or more. The larger the community, the more shared assets there are; also, those who take the vow of poverty commit to living simple lives.
Diocesan priests live more like their parishioners, paying taxes and insurance, making monthly payments on their cars, paying for the gas and maintenance, and buying clothes and food. This helps them appreciate that their people have financial and economic concerns and worries since they do, too, to some degree. While the residence is provided by the parish, diocesan priests must provide their own transportation and make co-payments for their prescriptions and medical expenses just like the laity.
This reality check helps them remember when it comes time to ask the congregation to donate more money each week because they, too, personally know about rising prices and costs of living. Even without a vow of poverty, diocesan priests are asked to live sensibly, modestly, and economically so as not to scandalize the faithful.