#### Formula to calculate pro-rate + 1 month

```Hi all,

I'm not an Excel expert but I am wondering how I might accomplish the
following.

I work at an ISP and lets assume a customer wants our 256 x 256
package which is \$31.00 month.

Obviously, if they sign up on say the 10th of the month, our billing
system bills them the 10th - End of Month + 1 FULL MONTH.

I'm wondering how I can put say \$31.00 + \$22.95 (phone service charge
per month) into a formula and have it figure out the pro-rate
depending on which date I use + the 1 full month?  Make sense?

I need a formula to calculate pro-rate (so let's use the 10th) 10th
through end of the month + 1 full month and have different figures/
sums depending where in the cycle it falls.

I hope this makes sense.  Let me know if I need to clarify and if you
have any ideas on how to accomplish this I am all ears.

Kind regards and many thanks in advance,

Steve Ryan

```
 0
mrsteveo (1)
10/9/2007 10:46:54 PM
excel 39879 articles. 2 followers.

3 Replies
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```For October if the customer started his/her plane on the 10th and the price
is in A1

=(DATE(2007,10+1,0)-DATE(2007,10,10)+1)*(A1/DAY(DATE(2007,10+1,0)))

with the month number in B1 and the day in C1

=(DATE(2007,B1+1,0)-DATE(2007,B1,C1)+1)*(A1/DAY(DATE(2007,B1+1,0)))

it's important to format the result as currency or number or else you will
get a pseudo date

--

Regards,

Peo Sjoblom

"mrsteveo" <mrsteveo@gmail.com> wrote in message
news:1191970014.577086.189940@k79g2000hse.googlegroups.com...
> Hi all,
>
> I'm not an Excel expert but I am wondering how I might accomplish the
> following.
>
> I work at an ISP and lets assume a customer wants our 256 x 256
> package which is \$31.00 month.
>
> Obviously, if they sign up on say the 10th of the month, our billing
> system bills them the 10th - End of Month + 1 FULL MONTH.
>
> I'm wondering how I can put say \$31.00 + \$22.95 (phone service charge
> per month) into a formula and have it figure out the pro-rate
> depending on which date I use + the 1 full month?  Make sense?
>
> I need a formula to calculate pro-rate (so let's use the 10th) 10th
> through end of the month + 1 full month and have different figures/
> sums depending where in the cycle it falls.
>
> I hope this makes sense.  Let me know if I need to clarify and if you
> have any ideas on how to accomplish this I am all ears.
>
> Kind regards and many thanks in advance,
>
> Steve Ryan
>

```
 0
terre081 (3244)
10/9/2007 11:02:42 PM
```This formula calculates the day of today's date 10/9/2007, divided by the
number of days in October, 31 to give a proration multiplier of 9/31 =
..290323.

=DAY(TODAY())/DAY(EOMONTH(TODAY(),0))
So, your full formula is: =DAY(TODAY())/DAY(EOMONTH(TODAY(),0))*(\$31.00 +
\$22.95) + \$31.00 + \$22.95 which equals \$69.61 if service starts on
10/9/2007.

You can leave out the \$ signs and the decimal points. Also you can put the
amounts \$31 in cells A1 and \$22.95  in B1 and use
=DAY(TODAY())/DAY(EOMONTH(TODAY(),0))*(A1 + B1) + A1 + B1

You have to install the Analysis Toolpak for Excel versions prior to Excel
2007. The EOMONTH function is standard in Excel 2007. You can, of course,
put any date in a cell, say A1 and substitute A1 in the formula for TODAY().
Then after prorating, you simply add one month's fees to that result.

"mrsteveo" <mrsteveo@gmail.com> wrote in message
news:1191970014.577086.189940@k79g2000hse.googlegroups.com...
> Hi all,
>
> I'm not an Excel expert but I am wondering how I might accomplish the
> following.
>
> I work at an ISP and lets assume a customer wants our 256 x 256
> package which is \$31.00 month.
>
> Obviously, if they sign up on say the 10th of the month, our billing
> system bills them the 10th - End of Month + 1 FULL MONTH.
>
> I'm wondering how I can put say \$31.00 + \$22.95 (phone service charge
> per month) into a formula and have it figure out the pro-rate
> depending on which date I use + the 1 full month?  Make sense?
>
> I need a formula to calculate pro-rate (so let's use the 10th) 10th
> through end of the month + 1 full month and have different figures/
> sums depending where in the cycle it falls.
>
> I hope this makes sense.  Let me know if I need to clarify and if you
> have any ideas on how to accomplish this I am all ears.
>
> Kind regards and many thanks in advance,
>
> Steve Ryan
>

```
 0
Tyro (331)
10/9/2007 11:35:59 PM
```Sorry, formula is wrong. It should be
=(DAY(EOMONTH(TODAY(),0))-DAY(TODAY())+1)/DAY(EOMONTH(TODAY(),0)) to
calculate the multiplier
..
It should be =DAY(TODAY())/DAY(EOMONTH(TODAY(),0))*(31 + 22.95) + 31 + 22.95
"Tyro" <Tyro@hotmail.com> wrote in message
news:zfUOi.32255\$eY.17843@newssvr13.news.prodigy.net...
> This formula calculates the day of today's date 10/9/2007, divided by the
> number of days in October, 31 to give a proration multiplier of 9/31 =
> .290323.
>
> =DAY(TODAY())/DAY(EOMONTH(TODAY(),0))
> So, your full formula is: =DAY(TODAY())/DAY(EOMONTH(TODAY(),0))*(\$31.00 +
> \$22.95) + \$31.00 + \$22.95 which equals \$69.61 if service starts on
> 10/9/2007.
>
> You can leave out the \$ signs and the decimal points. Also you can put the
> amounts \$31 in cells A1 and \$22.95  in B1 and use
> =DAY(TODAY())/DAY(EOMONTH(TODAY(),0))*(A1 + B1) + A1 + B1
>
> You have to install the Analysis Toolpak for Excel versions prior to Excel
> 2007. The EOMONTH function is standard in Excel 2007. You can, of course,
> put any date in a cell, say A1 and substitute A1 in the formula for
> TODAY(). Then after prorating, you simply add one month's fees to that
> result.
>
> "mrsteveo" <mrsteveo@gmail.com> wrote in message
> news:1191970014.577086.189940@k79g2000hse.googlegroups.com...
>> Hi all,
>>
>> I'm not an Excel expert but I am wondering how I might accomplish the
>> following.
>>
>> I work at an ISP and lets assume a customer wants our 256 x 256
>> package which is \$31.00 month.
>>
>> Obviously, if they sign up on say the 10th of the month, our billing
>> system bills them the 10th - End of Month + 1 FULL MONTH.
>>
>> I'm wondering how I can put say \$31.00 + \$22.95 (phone service charge
>> per month) into a formula and have it figure out the pro-rate
>> depending on which date I use + the 1 full month?  Make sense?
>>
>> I need a formula to calculate pro-rate (so let's use the 10th) 10th
>> through end of the month + 1 full month and have different figures/
>> sums depending where in the cycle it falls.
>>
>> I hope this makes sense.  Let me know if I need to clarify and if you
>> have any ideas on how to accomplish this I am all ears.
>>
>> Kind regards and many thanks in advance,
>>
>> Steve Ryan
>>
>
>

```
 0
Tyro (331)
10/9/2007 11:49:04 PM
 Reply:

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