The cost of a marriage annulment can vary depending on various factors, such as the state where the annulment is being sought, the complexity of the case, and whether or not attorneys represent the parties. Filing an annulment may cost from a few hundred to several thousand dollars. Additionally, some states require filing fees, which can add to the annulment cost. For example, in Massachusetts, the cost of filing an annulment is $220 (3). It is recommended to check with the court in your state or consult a family law attorney to get an estimate of the cost of an annulment in your specific case.