Time Value of Money (TVM) is the single most important concept in Financial Management — every chapter from capital budgeting to bond valuation is built on it. The idea is simple: ₹1 in your hand today is worth more than ₹1 promised to you a year from now, because today's money can be invested to earn returns. This is asked in almost every CA Inter FM paper, either as a standalone 4–6 mark calculation or as the engine inside NPV, IRR, and lease-vs-buy problems.
There are two directions to move money through time. Future Value (FV) asks: if I invest money today, what will it grow to? Use FV = PV × (1 + r)ⁿ. Present Value (PV) asks the reverse: what is a future cash flow worth today? Use PV = FV ÷ (1 + r)ⁿ. The process of calculating PV is called discounting, and the rate used is the discount rate (also called required rate of return or cost of capital). When interest earns further interest, that's compounding — the magic that makes FDs grow faster than simple interest.
For a series of equal periodic cash flows, use annuity formulas. PV of Ordinary Annuity = A × PVIFA(r, n), where PVIFA = [1 − (1+r)⁻ⁿ] ÷ r. An ordinary annuity has payments at period-end (default assumption in exams). An annuity due has payments at period-start — multiply ordinary annuity result by (1+r). A perpetuity — equal payments forever — simplifies beautifully: PV = A ÷ r. This shows up in preference share valuation. For compounding more than once a year (semi-annual, quarterly), adjust: r becomes r/m and n becomes n×m, where m = compounding frequency. ICAI typically provides PVIF and PVIFA tables in the question — use them to save time, but know the formulas cold in case tables aren't given.