50/30/20 Rule: 50% for needs (housing, food, utilities), 30% for wants (dining out, entertainment), and 20% for savings and debt repayment.
70/20/10 Rule: 70% for living expenses, 20% for debt repayment or investments, and 10% for savings or donations.
80/20 Rule: Simply save 20% of your income and spend the remaining 80% as you see fit.