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FIRE calculator guide

FIRE calculator - when can I retire early?

A FIRE plan becomes useful only when it gives you a concrete year, a target portfolio value and clear next actions. Dywidenciarz calculators help you move from a broad financial-independence idea to numbers you can review every quarter.

Quick FIRE calculator

Best for a first pass. Enter expenses, portfolio value and savings rate to estimate your FIRE number and approximate time to target in less than a minute.

Open quick FIRE

Advanced FIRE calculator

Model Lean, Barista and Fat FIRE scenarios, include inflation, Polish dividend tax and dividend reinvestment.

Go to the FIRE calculator

Plan monthly savings

Use the FIRE savings-rate calculator to check how much you need to put aside every month and whether that pace is realistic for your household budget.

Calculate the required savings rate

The key FIRE calculator inputs

  • Annual expenses: include fixed costs, irregular spending, travel and private healthcare so the plan reflects the lifestyle you actually want to fund.
  • Expected return: use conservative after-inflation assumptions. For many Polish investors, a 3-4% real return is a safer planning range than optimistic market averages.
  • Savings rate: this is the main lever for shortening the journey. A higher savings rate often changes your timeline more than small return assumptions.
  • Passive income: dividends, rent or flexible project income can reduce the portfolio size you need, but they should be modeled separately from guaranteed salary income.

How to read the calculator results

Years to FIRE

The result estimates how many years remain until passive income can cover your living costs. If the date is too far away, revisit spending, income growth or the savings rate.

Target portfolio

This is your FIRE number: the investable capital that can support withdrawals around 3-4% a year without relying on active income.

Safety margin

Add a 10-20% margin for unexpected spending, tax changes, market drawdowns or a longer transition period.

Withdrawal rhythm

Test monthly, quarterly and annual withdrawals so the cash-flow plan matches how you prefer to manage expenses.

Make the calculator part of your routine

Update the numbers quarterly

Review new expenses, raises, bonuses and dividends. Regular updates keep the plan useful instead of turning it into a one-off spreadsheet.

Add a FIRE review to your calendar

Connect it with dividend investing

Use the dividend portfolio calculator to estimate how much passive income your holdings could generate over the next decades.

Open dividend portfolio analysis

Frequently asked questions

Which FIRE calculator should I use first?
Start with the quick FIRE calculator for a fast estimate. When you want a more robust plan, move to the full FIRE calculator and the savings-rate tool.
How often should I update the calculator?
At least once per quarter, and whenever expenses, salary, bonuses or portfolio allocation change materially.
Does the FIRE calculator include taxes?
The advanced calculator lets you model Polish dividend tax and tax-advantaged retirement accounts, which makes the output more realistic for investors in Poland.