Estimated FIRE Number
£750,000
Annual spending divided by your selected withdrawal rate.
Premium FIRE planning tool
FIRE Number Calculator
Estimate your financial independence number, model your savings journey, and understand when your portfolio may support early retirement in a refined FinTech experience.
35 years
£30000
£50000
£1000
5.0%
Choose a conservative or aggressive retirement rule.
Projected years to FIRE
25 years
A planning estimate based on your current savings rate.
Projected FIRE age
60
The age at which your projected balance is expected to meet the target.
Balance at FIRE
£755,052
Projected portfolio value at the point of financial independence.
On Track
FIRE readiness status
Based on your current inputs, your projected portfolio position is close enough to support your FIRE target. This planning view helps you adjust spending, savings, or return expectations with clarity.
Portfolio coverage
7%
•You can stress-test different withdrawal rates instantly.
•The chart below shows the growth path from today to age 80.
•The design keeps the calculation readable on mobile and desktop.
Wealth growth timeline
Projected portfolio curve to age 80
This timeline highlights the working-and-saving phase and then transitions into the financial freedom period once your portfolio reaches the FIRE threshold.
What makes this estimate useful?
The output combines a classic 25×-style FIRE rule with flexible withdrawal assumptions so you can evaluate your retirement path in one clean view.
FIRE number
Calculated from annual spending and your selected withdrawal rate.
FIRE age
Shows the age where your projected investments can support the target.
Monthly savings
Adjusting this slider changes the growth path instantly.
Long-term return
Use a realistic assumption to keep the forecast disciplined.
Frequently Asked Questions
These answers target long-tail FIRE SEO queries and help explain the assumptions behind the calculator.
What is a FIRE number?
A FIRE number is the amount of money you need invested to generate enough annual withdrawals to cover your lifestyle using a chosen safe withdrawal rate.
Is the 25× rule accurate?
The 25× rule is a helpful shortcut based on a 4% withdrawal rate, but real-life retirement planning should also consider taxes, inflation, market risk, and personal flexibility.
What withdrawal rate should I assume?
A more cautious plan often uses 3%, while 3.5% is a balanced middle ground and 4% is common for higher spending confidence. The right assumption depends on your risk tolerance and retirement horizon.
How can I reach FIRE faster?
Increase your savings rate, reduce unnecessary spending, and keep your portfolio diversified with long-term discipline. Even modest improvements can shorten the path to financial independence.