What typically causes different results in time value of money calculations?

In time value of money (TVM) calculations, different results can arise from several factors, but rounding is generally a minor contributor compared to other significant influences like the length of investment periods and interest rates. However, when rounding is applied, particularly in financial calculations that involve numerous compounding periods or large figures, it can slightly alter the final result. While rounding makes sense in achieving a straightforward number, it does not fundamentally change the underlying financial principles or methods.

Investment periods and interest rates directly affect the future value or present value calculations, significantly impacting the final output and demonstrating the critical nature of accurate input data. Currency fluctuations, while relevant in certain contexts, usually pertain to converting values between different currencies rather than affecting the intrinsic calculations of time value of money directly.

Thus, while rounding can lead to discrepancies in calculations, it is generally the more profound factors related to periods and interest rates that primarily drive different outcomes in time value of money evaluations.