https://www.financialfinesse.com/2023/09/20/financial-rules-of-thumb-the-50-30-20-rule

50% needs, 30% wants, 20% goals.

Robert Kiyosaki suggested 10-10-10 – Save 10%, Invest 10%, donate 10% – prefer this ratio – 5 Frugal Habits of Robert Kiyosaki