# Proration: The Definition, Calculation and Examples

## What is proration and how does it work

Proration is a mathematical calculation used to determine the pro-rata, or proportionate, share of something. It is commonly used in business to calculate things like rent, ownership, and expenses. For example, if you are renting a apartment for \$1000 per month and move in on the 15th of the month, your rent would be prorated to \$500 for that month because you would only be living in the apartment for half the month. Proration can also be used to calculate things like ownership percentages and expense shares. For example, if you and two other people own a car that you all use equally, each of you would be responsible for one-third of the car’s expenses. In order to calculate a proration, you simply need to divide the total amount by the number of days, weeks, months, or years involved.

## How to calculate proration manually

Proration is the process of allocating rent payments based on the number of days that a tenant occupies a property. To calculate proration manually, you will need to know the total rent amount, the number of days in the month, and the number of days that the tenant will be occupying the property. For example, if the rent is \$1,000 per month and the tenant is moving in on the 15th day of the month, you would calculate the prorated rent as follows: \$1,000 / 30 days x 15 days = \$500.

The prorated rent would then be due on the date of move-in. Proration can also be used to calculate other charges such as utilities and amenities. For example, if the monthly utility bill is \$100 and the tenant is responsible for a portion of that bill, you would calculate the prorated amount as follows: \$100 / 30 days x 15 days = \$50. The prorated amount would then be due on the date of move-in. Proration can be a complex process, but by following these simple steps you can easily calculate the amount due.

## How to calculate proration in Excel

To calculate proration in Excel, start by creating a new column with the heading “Prorate.” Then, in the cell under Prorate, enter the following formula: =A2/B2. In this formula, A2 is the original amount you are allocating (in this case, rent), and B2 is the number of days in the period (in this case, 30). This formula will give you the daily proration rate. To calculate the prorated amount for a specific day, simply multiply the daily rate by the number of days in that period. For example, if you move out on the 15th, you would multiply the daily rate by 15 to get your prorated rent amount for that month.

## Proration examples

Proration is the process of allocating something, typically expenses or payments, over a period of time. The most common proration examples involve rent, utilities, and insurance premiums. For instance, if a tenant moves out in the middle of the month, their landlord may prorate their rent, charging them only for the days they occupied the unit. Utilities companies often have a similar policy, whereby customers are only responsible for the service they use. Insurance premiums are usually calculated on an annual basis, but if a policy is cancelled mid-year, the company may pro-rate the premium, refunding the unused portion to the policyholder. In each of these cases, proration ensures that both parties are only paying for what they actually receive.

## Pros and cons of proration

There are both advantages and disadvantages. On the plus side, it ensures that everyone gets their fair share. It is also simple and easy to calculate. However, proration can also lead to unfairness because it does not take into account individual circumstances. For example, if person A has \$100 and person B has \$1000, each would get the same amount under a 10% proration plan even though person B has 10 times as much. As a result, it is not always the best way to allocate resources.

## Proration FAQs FAQs

### What is the difference between proration and allocation?

Proration is the process of allocating something, typically expenses or payments, over a period of time. Allocation, on the other hand, refers to the initial distribution of something. For example, when you allocate funds to a budget category, you are determining how much money will be set aside for that category. When you prorate expenses, you are distributing those expenses over a period of time, such as monthly or annually.

### Can proration be negative?

Yes, it can be negative. This occurs when the total amount to be allocated is less than the sum of the parts. For example, if you have a \$100 credit on your account and you are allocating it over a period of 10 days, the daily rate would be \$10. However, if you only use 8 of those days, the prorated amount would be negative \$2. This is because you would have used up your credit before the end of the period.