Prorated Rent Clause: Sample Lease Language & Calculation
Learn how to draft a clear prorated rent clause for residential leases. Copy pre-written lease provisions for mid-month move-ins, daily rates, and calculation methods.
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Prorated Rent Lease Addendum
(Rider to Residential Lease Agreement)
This Prorated Rent Addendum ("Addendum") is made on [DATE], and supplements the Residential Lease Agreement dated [LEASE DATE], between Landlord: [LANDLORD NAME] and Tenant(s): [TENANT NAME(S)] for the property located at: [PREMISES ADDRESS, UNIT #, CITY, STATE, ZIP].
1. PARTIAL MONTH OCCUPANCY & PRORATION METHOD:
The parties agree that Tenant shall take possession of the Premises on [MOVE-IN DATE]. Because occupancy commences mid-month, rent for the initial partial billing period through [END OF MONTH DATE] (representing [NUMBER OF DAYS] days) shall be prorated as follows:
- Standard Monthly Rent:
$[MONTHLY RENT] - Proration Formula: Actual Calendar Days Method (Base Rent ÷ Days in Month × Days Occupied)
- Total Prorated Amount Due:
$[PRORATED SUM]payable on or before[PAYMENT DUE DATE].
2. SUBSEQUENT PAYMENTS: Regular full monthly rental payments in the amount of $[MONTHLY RENT] shall resume on [FIRST FULL MONTH DATE] and continue on the 1st of each subsequent calendar month.
What is a Prorated Rent Clause?
A prorated rent clause is a specific provision written into a residential lease agreement that defines how rent is apportioned when a tenant occupies a dwelling for only a fraction of a billing cycle. This situation most commonly occurs when:
- A tenant moves in mid-month (e.g., October 15th) and the lease specifies standard billing on the 1st of each month.
- A month-to-month tenant delivers proper statutory termination notice with an effective vacancy date mid-month.
- A tenant signs an early move-in addendum 3 to 5 days prior to the first of the month.
Why Memorializing the Proration Method in Writing Matters
Because calendar months vary in length (28 days in February vs. 31 days in March), different mathematical formulas yield different daily rates. Disagreements arise when a landlord's accounting software uses one formula (such as standardizing every month to 30 days) while a tenant calculates rent using the exact calendar days.
Including an explicit proration clause inside your Residential Lease Agreement removes ambiguity by establishing the exact daily rate formula and payment due date.
Sample Prorated Rent Clauses (Copy & Paste)
Below are three standard clause options tailored to common residential leasing practices:
Option 1: Actual Calendar Days Method (Standard Residential Default)
Calculates daily rent based on the exact number of days in the specific month (28, 29, 30, or 31). This is the most widely recognized default when a lease does not specify otherwise.
Option 2: 30-Day Month Method (30/360 Accounting Standard)
Treats every month as having exactly 30 days regardless of the actual calendar length. Convenient for uniform bookkeeping software.
Option 3: Full First Month with Second-Month Proration Credit
Standard corporate property management policy: collects full first month rent upfront for security screening, and applies the prorated discount to the second month.
Worked Mathematical Example
Consider a residential tenancy starting on October 16th with a monthly rent of $2,400.00:
- Days in October: 31 days.
- Occupancy Days (Oct 16 through Oct 31 inclusive): 16 days.
- Under Actual Calendar Days:
($2,400 ÷ 31) × 16 = $1,238.71. - Under 30-Day Method:
($2,400 ÷ 30) × 16 = $1,280.00. - Variance: $41.29 difference based on formula choice.
To calculate the exact numbers for your specific dates, use our interactive Prorated Rent Calculator or review our 30-Day vs. Actual Days Comparison Guide.
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