Money
Compounding, independence, liabilities, UK property, tax wrappers and cash runway. Deterministic. In your browser.
Compound Engine
Growth with contributionsProject exponential capital growth with recurring contributions, compounding frequency, and real inflation drag.
Best for: Long-term index fund modelling and multi-decade wealth planning.
OpenFIRE Matrix
Independence timelineCalculate net-worth milestones and safe-withdrawal timelines to reach financial autonomy.
Best for: Pinpointing your early retirement date and required target portfolio.
OpenDebt Payoff Engine
Avalanche vs snowballSimulate avalanche versus snowball strategies to cut interest leakage across liabilities.
Best for: Choosing the fastest route to clear loans, cards, or a mortgage.
OpenBuy-to-Let Yield
UK property returnsGross and net yield, Section 24 tax, debt service, SDLT, and rate-stress cashflow.
Best for: Assessing a UK residential rental before you commit capital.
OpenISA / GIA Optimiser
Wrapper tax frictionQuantify compounding friction from dividend and CGT in a GIA versus a tax-free ISA.
Best for: Decide portfolio location and the cost of leaving money unshielded.
OpenRunway Matrix
Cash reserve targetLiquid capital required from fixed versus variable burn, dependants, and income volatility.
Best for: Calibrating cash for an employment gap or business downturn.
Open