how to calculate prorated rent when moving out mid month in a residential lease

To calculate prorated rent when moving out mid-month, divide the monthly rent by the number of days in that month and multiply the result by the number of days the unit was occupied.

Step-by-Step Calculation Process

Identify the exact move-out date recorded in writing. Count the days from the first of the month through the move-out date inclusive. Divide the full monthly rent by the total days in the calendar month. Multiply that daily rate by the days occupied. Subtract the result from the rent already paid to determine the refund amount.

1. Confirm the move-out date with the landlord in writing.
2. Determine total days in the month (28–31).
3. Calculate daily rent: monthly rent ÷ days in month.
4. Multiply daily rent by days occupied.
5. Subtract from rent paid to find refund due.

Practical takeaway: Perform this calculation the day after you vacate and email the landlord the exact dollar figure with your supporting arithmetic.

Example Using Real Numbers

Monthly rent is $2,400. Tenant moves out on the 12th of a 30-day month. Daily rate equals $80. Tenant occupied 12 days, so rent due is $960. Landlord must refund $1,440 of the $2,400 already paid.

Practical takeaway: Plug your own rent and dates into the same table format before sending any demand letter.

Lease Language That Overrides Standard Proration

Many leases state that rent is due in full for any partial month or that the tenant forfeits the final month’s rent upon early termination. Courts in Texas and Florida routinely enforce these clauses when they are clear and conspicuous. Review the termination section and any addendum titled “early termination” or “proration policy.”

• Look for phrases such as “no proration of rent” or “full month’s rent required.”
• Check notice requirements—30 days is common; shorter notice can trigger full-month liability.
• Verify whether the clause applies only to tenant-initiated moves or also to landlord terminations.

Practical takeaway: Screenshot or copy the exact clause and paste it into your move-out email so the landlord cannot later claim ambiguity.

State-Specific Rules and Timeframes

California Civil Code §1946.1 requires 30-day notice and permits daily proration unless the lease says otherwise. New York Real Property Law §226-c mandates that security deposits be returned within 14 days and any rent credit applied. Illinois allows landlords to keep prepaid rent only if the lease explicitly waives proration. Always confirm the governing statute for your property location before finalizing numbers.

Practical takeaway: Search your state’s tenant handbook for the phrase “prorated rent” and note the citation in your records.

Security Deposit and Final Accounting

Landlords must itemize deductions and return the balance within statutory deadlines—usually 14 to 30 days. Any prepaid rent credit should appear on the same statement. If the landlord withholds the prorated amount without explanation, send a written demand citing the specific statute.

Practical takeaway: Keep copies of all utility final readings and the move-out inspection checklist to prevent unrelated deductions from offsetting your rent refund.

TermScore can automatically analyze contracts for these exact issues.