The 50/30/20 Principle: A simplified guide made for humans

Introduction to the 50/30/20 mindset

This principle is a simple yet effective budgeting rule that helps individuals manage their income efficiently. The 50/30/20 rule divides after-tax income into three categories: 50% for needs, 30% for wants, and 20% for savings and investments. By adhering to this principle, you can ensure a balanced financial life, covering essential expenses, enjoying discretionary spending, and securing your future through savings and investments.


Breakdown of the 50/30/20 Rule

50% for Needs

Needs are essential expenses that are necessary for survival and basic well-being. These include:

  • Housing (rent or mortgage)
  • Utilities (electricity, water, gas)
  • Groceries
  • Transportation (car payments, fuel, public transit)
  • Insurance (health, auto, home)
  • Minimum loan payments
  • Childcare and education costs

30% for Wants

Wants are non-essential expenses that enhance your lifestyle. These include:

  • Dining out
  • Entertainment (movies, concerts, hobbies)
  • Travel and vacations
  • Shopping (clothing, gadgets)
  • Gym memberships
  • Subscriptions (streaming services, magazines)

20% for Savings and Investments

This portion is dedicated to building your financial future. It includes:

  • Emergency fund
  • Retirement accounts: RRSP
  • Investment accounts TFSA / FHSA or Non-registered accounts.
  • Debt repayment (beyond minimum payments)
  • Savings for major purchases (home, car, education)

The Power of Investing 20% Savings

Assumptions

  • Annual income: $60,000 (after-tax)
  • 20% savings: $12,000 per year
  • Investment return: 7% annually
  • Investment period: 25 years

Investment Growth Calculation

To understand the potential value of adhering to the 20% savings rule, we can use the future value formula for compound interest:

FV = PV [1 + (r/n)]nt

  • ( FV ) = Future Value
  • ( PV ) = Annual savings ($12,000)
  • ( r ) = Annual return rate (7% or 0.07)
  • ( n ) = Number of times the amount is compounding
  • ( t ) = Number of years (25)

The value of n depends on the number of times the amount is compounding.

  • n = 1, if the amount is compounded yearly.
  • n = 2, if the amount is compounded half-yearly.
  • n = 4, if the amount is compounded quart-yearly.
  • n = 12, if the amount is compounded monthly.
  • n = 52, if the amount is compounded weekly.
  • n = 365, if the amount is compounded daily.

Example:

FV = 12000(1+0.071)1×25 

or $758,916.00 after 25 years of 7% interest compounding yearly.

In other words, you save $300,000 of your own money over 25 years, and compound interest will earn you $458,916 over that same time frame.

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Conclusion

The 50/30/20 principle is a practical and straightforward approach to managing personal finances. By allocating 50% of your income to needs, 30% to wants, and 20% to savings and investments, you can achieve a balanced financial life. Moreover, the potential growth of your investments over time underscores the importance of saving and investing a portion of your income. Adhering to this principle can lead to financial stability and a secure future.


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