The widely recommended guideline is that rent should not exceed 30% of your monthly income. This rule is intended to help avoid financial strain and ensure you have enough money for other living expenses, savings, and financial goals. However, this percentage can vary depending on personal circumstances, such as income level, family size, location, and local rental market conditions. For example, high earners might choose to spend less proportionally, while those in very expensive cities or with lower incomes may need to allocate a higher percentage to rent. The 30% rule remains a common starting point for budgeting rent affordability.