An annuity due is a series of annual payments made at the beginning of each year for a fixed number of years. Annuity due formulas are used to calculate annuity due values. The formula to use will depend on which components of the annuity due are already known.
Annuity Due Formula Examples
The listing below summarizes the various formulas to use for annuity due calculations.
In all annuity due formulas the following symbols are used.
- FV = Future value
- PV = Present value
- i = Periodic rate
- Pmt = Periodic payment
- n = Number of years
- LN is a natural logarithm
The example used below for each annuity due formula is based on the following information.
- Future value = FV = 7,922.80
- Present value = PV = 4,992.71
- Annual annuity rate = i = 8%
- Annual annuity payment = Pmt = 1,000
- Number of years = n = 6
Future Value of an Annuity Due
Formula FV = Pmt x ((1+i)n-1)/i x (1+i) Excel Formula FV = -FV(i%,n,Pmt,,1) Example FV = 1000 x ((1+8%)6-1)/8% x (1+8%) = 7,922.80
Present Value of Annuity Due
Formula PV = Pmt x ((1-1/(1+i)n)/i x (1+i)) Excel Formula PV = -PV(i%,n,Pmt,,1) Example PV = 1000*((1-1/(1+8%)6)/8% * (1+8%)) = 4,992.71
Calculate Annuity Due Payments based on Present Value
Formula Pmt = PV/((1-1/(1+i)n)/i x (1+i)) Excel Formula Pmt = PMT(i%,n,-PV,,1) Example Pmt = 4,992.71/((1-1/(1+8%)^6)/0.08 * (1+8%)) = 1,000
Calculate Annuity Due Payment based on Future Value
Formula Pmt = FV/(((1+i)n-1)/i x (1+i)) Excel Formula Pmt = PMT(i%,n,,-FV,1) Example Pmt = 7,922.80/(((1+8%)6-1)/8% * (1+8%)) = 1,000
Number of years based on Future Value of Annuity Due
Formula n = LN(FV x i/(Pmt x (1+i))+1)/LN(1+i) Excel Formula n = NPER(i%,Pmt,,-FV,1) Example n = LN(7,922.80 x 8%/(1000 x (1+8%))+1)/LN(1+8%) = 6
Number of years based on Present Value of Annuity Due
Formula n = -LN(1+i x (1-PV/Pmt))/LN(1+i)+1 Excel Formula n = NPER(i%,Pmt,-PV,,1) Example n = -LN(1+8%*(1-4,992.71/1000))/LN(1+8%)+1 = 6
The annuity due formulas are summarized below.
The other type of annuity is the regular annuity where payments are made at the end of each year.
About the Author
Chartered accountant Michael Brown is the founder and CEO of Plan Projections. He has worked as an accountant and consultant for more than 25 years and has built financial models for all types of industries. He has been the CFO or controller of both small and medium sized companies and has run small businesses of his own. He has been a manager and an auditor with Deloitte, a big 4 accountancy firm, and holds a BSc from Loughborough University.