Financial formulas
Model loan payments, net present value, internal rate of return, and depreciation.
Calculate future value of savings with FV
Calculate internal rate of return with IRR
Calculate net present value with NPV
Calculate straight-line depreciation with SLN
Calculate the interest rate of a loan with RATE
Frequently asked questions
How do I calculate an annual payment instead of monthly?
Use the annual rate directly and the total years as nper — =PMT(B1, B2, -B3) — without dividing or multiplying.
How do I model a lump-sum investment with no ongoing contributions?
Set pmt to 0 and use the pv argument — =FV(rate, nper, 0, -lump_sum) — to grow a one-time deposit at compound interest.
What is the difference between IRR and XIRR?
IRR assumes evenly-spaced periods. XIRR accepts actual dates for each cash flow, making it more accurate for irregular payment schedules.
What does a positive NPV mean?
A positive NPV means the investment creates value — the discounted future cash flows exceed the initial cost. A negative NPV means the investment destroys value at the given discount rate.