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Free Prorate Calculator

Get Started with our Prorate Calculator

If your tenant doesn’t move in on the first day of the month, how do you work out how much rent is due for that first payment period? Use our Prorate Calculator to easily calculate the prorated rent.

Monthly Rent


Move-in date

Rent Per Day


Per day

Prorate Days


Days remaining in month

Prorate Rent


About Prorate Rent

What Is Prorated Rent?

Prorated rent is simply the way to work out how much rent is due when a tenant hasn’t been in the lodgings for the full billing cycle. For example, they move into your property on the 14th of the month but the billing cycle begins on the 1st of the month. You have to work out how much rent they owe for the 16/17 days remaining in that billing cycle.

Why Do You Need To Prorate Rent?

You will need to calculate prorated rent to accurately reflect the amount of time your tenant has actually stayed in your property. If a tenant had moved into the property half way through a monthly lease period, this calculator is useful to figure out how much the tenant needs to pay.

Manually Calculating Prorate Rent

While it’s easier to simply use a prorate calculator, you can use some basic math to manually determine prorated rent. We have included these equations below to help give you an idea as to how calculating prorated rent actually works. Knowing how to calculate it manually will allow you to check any online calculator you might use.

The most basic method is to calculate rental costs per day. Once you’ve worked that out you multiply by the remaining days left in the billing cycle.

  1. Monthly Rent / Days of Month = Daily Rate
  2. Days of Month – Date tenant moves in + move-in day = Days left in Billing Cycle
  3. Daily Rate * Days left in Billing Cycle = Prorated Rent


  • Monthly Rent $800.
  • 30 Days in the billing month.
  • The billing cycle starts on the 1st.
  • Tenant moves in on the 7th.


  1. 800 /30 = $26.67
  2. 30 – 7 + 1 (move in day) = 24
  3. $26.67*24 = $640.08

The Prorated rent for them in this example then would be $640.08.

Other Things To Consider

  • Is it a leap year?

A shorter month means a larger daily rate.

  • Billing Date

eg. is it the 1st?

  • Does the rent span across months?

Work the exact count of days for the billing cycle.

  • Are they paying more than 1 month at a time?

Different months will have different daily rates.


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