Understanding the Basics of Wills: When to get a will? There are several circumstances throughout life that may trigger a need to change or update your will, such as: Age. Once you reach the legal age of majority in your province or territory (usually 18 or 19), you can legally create a will. Assets. You own assets such as property, investments, bank accounts, or personal belongings, having a will allows you to specify the distribution of these assets after your decease. Dependents. If you have dependents, such as children or others who rely on your financial support, a will enables you to name guardians for your minor children and provide for their well-being….