Money

Money

Deterministic personal finance — every number computed, nothing invented.

Money

Data sources

  • Loan offers you entered your data
  • Annuity, APR, compound interest formulas computed
  • Static FX reference rates reference data
  • Bundled Warsaw listings (median rent/price per m²) reference data
  • Live bank product catalogue not connected
  • Live FX feed not connected

Method

Monthly payment: annuity formula P·r·(1+r)^n / ((1+r)^n − 1), where P is principal, r the monthly nominal rate and n the number of months, plus any monthly fee.

Effective APR: solved by bisection on the internal rate of return of the real cash-flow schedule (amount received minus setup fee, against every scheduled payment). Tolerance 1e-9 on the monthly rate, max 200 iterations, annualised as (1+monthly)^12 − 1.

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