Calculators and simulators.
Calculators and simulators.
Emergency fund calculator
Type your monthly expenses, pick months of buffer, and see the target plus what holding it costs you long-term.
Inflation simulator
How much purchasing power does your savings lose over time?
Compound interest simulator
What does a monthly contribution become after twenty or thirty years?
Bond duration calculator
Move the rate, watch four bonds react. Why a 30-year bond falls hard when rates rise, and a 2-year barely flinches.
Accumulating vs distributing
Same money, same return. Reinvest dividends untaxed inside an accumulating ETF, or pay tax on each distribution. The 30-year gap.
Risk-return plot
Where does each asset class sit on the risk-return curve, and which fit your tolerance?
Currency impact simulator
Same asset, two investors. How a moving exchange rate cushions or amplifies the return for the one who reports in euros.
Lump sum vs DCA · three regimes
Three idealized markets, twelve months each. Same total, two strategies. Which regime favors lump sum, which rewards DCA?
Lump sum vs DCA · iconic years
Eight famous market years played side by side. Same total invested, two strategies. Pick a year and watch the path decide.
Fee impact calculator
How much of your final balance does a 1% annual fee actually consume over forty years?
Cost of waiting calculator
How much is each year of delay worth, when both investors save the same amount each month?
Capital gains and dividends
How much of your investment profit actually reaches your pocket, across Spain, the UK, and the US.
Allocation & rebalancing
Pick a target, watch a portfolio drift over years, and see what the gap between target and drift costs you in a crash.
Tax breakdown by country
Type a gross salary. See how much you actually keep, and where the rest of it goes.
Retirement / FIRE calculator
How much do you need to retire on the income you want, and when does your current path get you there?