Financial guides

Our calculator pages include current formulas and worked examples. Earlier articles are retained below with a historical-content notice.

Current calculation methods

Estimate a fixed monthly loan payment, total interest and the effect of extra principal payments.

Project regular monthly investments with an explicit choice of beginning or end-of-month contributions.

Estimate principal and interest alongside separately entered property tax, insurance and recurring housing costs.

Calculate lump-sum growth with an explicit compounding frequency, including negative-rate scenarios.

Calculate total return and annualized growth for a single starting and ending value.

Project a retirement balance and compare it with an inflation-adjusted spending and withdrawal-rate scenario.