Find Your Financial Freedom Goal in 60 Seconds: Estimating Your FIRE Number
If you hope to enjoy greater life choices in the future—and potentially retire earlier while living the life you truly want—you will need a pool of accumulated assets, commonly referred to as a FIRE number.
A FIRE number represents the total amount of assets required to achieve Financial Independence and Retire Early (FIRE).
The purpose of this estimate is to ensure that the passive income generated by your investments can consistently and sustainably cover your living expenses, without the need to continue working. It can serve as a reference point for planning your desired standard of living.
How Do You Calculate Your Annual Living Expenses?
Before estimating your FIRE number, it is important to have a clear understanding of your annual expenses.
When reviewing your spending, the following categories can help you make a more comprehensive assessment:
Category |
Examples |
Housing |
Mortgage, rent, utilities, internet, property tax, credit card spending |
Food |
Eating out, groceries at home |
Personal |
Clothing, skincare/make‑up, media subscriptions, pet care |
Health |
Medical insurance, life insurance, dental work, contact lenses |
Transport |
Car insurance, vehicle maintenance, fuel, public transport fares |
Social |
Gifts, gatherings, extracurricular Activity Fees |
Since some expenses are paid monthly while others are annual or irregular, your total annual spending can be calculated as follows:
(Monthly living expenses × 12) + Annual expenses = Total annual spending
Once this figure is established, you can move on to estimating your FIRE target amount.
What Is the "4% Rule"?
After calculating your annual expenses, you can use the 4% rule as a reference to estimate the level of assets required for retirement, your FIRE target amount.
The basic assumption of the 4% rule is that your annual living expenses represent approximately 4% of your total investment assets. If investment returns are equal to or higher than 4%, it is theoretically possible to use those returns to cover living expenses, while aiming to maintain or gradually grow the value of your assets. This serves as one of the reference assumptions when estimating retirement asset needs.
The calculation methods are:
- Method 1: Total annual expenses × 25 = FIRE amount
- Method 2: Total annual expenses ÷ 0.04 = FIRE amount
Example:
If your monthly expenses are HK$20,000:
- Annual expenses: HK$20,000 × 12 = HK$240,000
- Required FIRE number: HK$240,000 × 25 = HK$6,000,000
In other words, accumulating approximately HK$6 million in investment assets can provide a more reassuring financial foundation for retirement planning.
Three Actions to Start Your Financial Freedom Journey
"Financial freedom" may still feel like an abstract concept. However, through clear calculations and thoughtful planning, it can be transformed into a tangible and measurable goal—your own number.
You can begin with these three simple and sustainable actions:
- Write Down Your Financial Goal
Record your FIRE number and place it somewhere you will see every day, as a reminder of what you are working towards.
- Track Your Living Expenses for 30 Days
Use a financial app or a simple expense tracking record to better understand where your money goes, helping you manage spending more systematically and build a stronger foundation for long-term planning.
- Use the Right Tools and Plan for the Long Term
Appropriate tools and solutions can provide practical support throughout your financial planning journey.
You may consider making use of Prudential Hong Kong's range of financial and retirement calculators to estimate funding needs across different life stages. Based on your personal goals, you can also explore suitable savings and retirement planning solutions to help build a more resilient financial foundation for the future.