Free Microsoft Excel 2013 Quick Reference

# Calculate Compound Interest Rate Growth

Morning,

Has anybody ever come up with a way to discover the a compound interest growth rate based on actual numbers... for example;

Jan05 - 75
Jan06 - 150
Jan07 - 290
Jan08 - 440

I have a long list of investments that I am working on for a colleague, and want to show the growth in interest rate. In addition, I have payment schedules from loans for which I want to do the same, although I imagine the formula will be the same.

Any suggestions?

Cheers,

Paul

## Related Results

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Objective of Function: To find compounded interest for a given period.

User Input:
Start_Date =7/17/2007 (Date of Placing a Deposit)
From_Date =7/10/2007(Date from which user wants interest)
To_Date = 10/31/2007(Date till which user wants interest)
Principal_Amount = 50,000 (Amount invested/deposited)
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Given below is the function which I have created.
```
VB:

Date, Principal_Amount As Double, Interest_Rate As Double,
Compounding_Frequency As Integer)

'storing user input in temp variables for ease of reference
st_dt = Start_Date
fm_dt = From_Date
to_dt = To_Date
pr_amt = Principal_Amount
int_rate = Interest_Rate
freq = Compounding_Frequency
freq_ctr = 1 'frequency counter for calculating # of completed compounding periods
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Dim tmp_dt As Date 'for storing temp values for date
Dim tmp_date_2 As Date
org_st_dt = st_dt

Do

LDM = [atpvbaen.xls].EoMonth(st_dt, 0)
If [atpvbaen.xls].Edate(org_st_dt, freq * freq_ctr)

```

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-------------------------------

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I am trying to determine which formula in excel will allow me to calculate the interest rate for an annuity where I know the present value of the payments, the amount of each annual payment and the number of periods.

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--
RayYeung
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