FIRE Calculator UK / Ireland — How to use & plan your FIRE goal

What is FIRE?

FIRE stands for Financial Independence, Retire Early. It’s a growing movement of people who aim to save and invest enough so that they can stop working — or work only if they want to — well before the traditional retirement age.

In simple terms, FIRE is about:

• ✅ Saving aggressively during your working years
• ✅ Keeping your spending low
• ✅ Investing your savings wisely
• ✅ Reaching a “FIRE number” — the amount you need invested to live off, year after year

How to use this FIRE Calculator

This calculator helps you estimate:

• ✅ How much you need to reach your FIRE number
• ✅ How many years it might take, based on your savings rate
• ✅ The impact of changing your expenses or investment returns

You’ll need to enter:

1. Your current invested savings
2. Your target annual expenses (post-FIRE)
3. Your monthly savings
4. Expected annual return on investments
5. Target number of years — or let the calculator estimate it for you

Tips for using the calculator

Be realistic about your post-FIRE expenses — don’t forget healthcare, housing, or hobbies!

Investment returns can vary — conservative estimates (4–6%) are often safest.

Review your plan yearly — as markets and life can change.

Many FIRE followers use a “safe withdrawal rate” of 3.5–4% — this calculator helps you model that.

Ready to start?

👉 Try our FIRE Calculator here — and compare investment platforms to help you reach your FIRE goal faster.