Most renters know that moving in mid-month means paying prorated rent. Fewer realize the same rule applies on the way out. If your lease ends or you give notice on a date that doesn't fall on the last day of the month, you should only owe rent for the days you actually occupied the unit — not the full month.
This guide explains exactly how move-out proration works, how to calculate it using the most common methods, what counts as your last day, and what to do if your landlord tries to charge you for more days than you were there.
How Move-Out Proration Works
When you move out before the end of a month, your final rent payment covers only the days from the first of that month through your last day in the unit. The math is essentially the same as move-in proration — you're paying for a fraction of a month rather than all of it.
Example: Your rent is $1,800/month. You give 30 days notice on March 15th, making your last day April 14th. You owe full rent for March (already paid) plus prorated rent for April 1st–14th — 14 days, not the full 30.
At the calendar days method: $1,800 ÷ 30 days in April × 14 days = $840. Not $1,800.
The Three Calculation Methods for Move-Out
The same three methods used for move-in proration apply to move-out. Your landlord should use whichever method is specified in your lease — or the one they used when you moved in.
Calendar Days Method (Most Common)
Divides monthly rent by the actual number of days in your final month, then multiplies by the number of days you occupied the unit that month.
Formula: (Monthly Rent ÷ Days in Final Month) × Days Occupied
30-Day Method
Always uses 30 as the divisor regardless of how many days the month has.
Formula: (Monthly Rent ÷ 30) × Days Occupied
Annual Method
Calculates a daily rate from your annual rent divided by 365.
Formula: (Monthly Rent × 12 ÷ 365) × Days Occupied
Use our prorated rent calculator to run all three methods side by side with your actual numbers. Knowing the result under each method helps you immediately spot if your landlord's invoice is using an unusual approach.
What Counts as Your Last Day
This is where move-out proration disputes most often begin. There are a few different conventions for what day is considered your last billable day:
The Day You Hand Over Keys
Many landlords count the day you physically return the keys as your last day of occupancy — even if you removed all your belongings the day before. If you hand over keys on April 14th, you owe through April 14th.
The Last Day of Your Notice Period
If your lease requires 30 days written notice and you gave notice on March 15th, your official last day is April 14th regardless of when you actually vacate.
The Date in Your Lease Termination Agreement
If you and your landlord signed a lease termination or early exit agreement, that document controls — whatever date it specifies is your last day for billing purposes.
What to do: Before you move out, get written confirmation from your landlord of the exact date they consider your tenancy to end. This prevents a situation where you thought you left on the 14th but your landlord counts you through the 15th because you didn't formally hand over keys until that morning.
Worked Examples by Scenario
Scenario 1: Standard 30-Day Notice, Mid-Month Move-Out
Monthly rent: $1,600. Notice given April 1st. Last day: April 30th (full month — no proration needed). Rent owed for April: $1,600.
Now, if notice was given March 20th instead: Last day is April 19th. Days in April occupied: 19.
- Calendar Days: $1,600 ÷ 30 × 19 = $1,013.33
- 30-Day Method: $1,600 ÷ 30 × 19 = $1,013.33 (same for April since April has 30 days)
- Annual Method: ($1,600 × 12 ÷ 365) × 19 = $998.36
Scenario 2: Lease Ends Mid-Month (Fixed-Term Lease)
Monthly rent: $2,100. Lease runs January 15th–January 14th the following year. Final month: January 1st–14th. Days in January: 31.
- Calendar Days: $2,100 ÷ 31 × 14 = $948.39
- 30-Day Method: $2,100 ÷ 30 × 14 = $980.00
- Annual Method: ($2,100 × 12 ÷ 365) × 14 = $965.75
Scenario 3: Early Lease Termination by Mutual Agreement
Monthly rent: $1,350. You and your landlord agree you'll vacate on the 10th of the current month. Days occupied this month: 10.
- Calendar Days (30-day month): $1,350 ÷ 30 × 10 = $450.00
- 30-Day Method: $1,350 ÷ 30 × 10 = $450.00
- Annual Method: ($1,350 × 12 ÷ 365) × 10 = $443.84
Note: Early termination agreements may also involve early termination fees separate from prorated rent. Make sure any written agreement clearly separates the prorated rent amount from any fees so you know exactly what you're paying for.
What If You Already Paid a Full Month?
If you paid first and last month's rent at move-in, your "last month" deposit was intended to cover your final month. If you're moving out mid-month, that deposit likely overpaid your final rent — and you should receive the difference back.
Example: You paid $1,800 last month's rent at move-in. You're leaving on the 20th. Your prorated final month rent is $1,200. Your landlord owes you $600 back — either as a refund or as a credit against your security deposit return.
Get this in writing before you move out. Send a brief email to your landlord stating the prorated amount you calculate is owed, and request confirmation of how the overpaid last month's rent will be returned.
How Move-Out Proration Affects Your Security Deposit
Your security deposit return and your final prorated rent bill are separate — but landlords sometimes handle them together, which can create confusion about what's being deducted for what.
When reviewing your deposit itemization after move-out, make sure:
- Any final prorated rent deduction uses the correct method and day count
- The deduction is labeled as "prorated rent" separately from damage deductions
- The math is shown, not just a dollar amount
If your landlord deducts an incorrect prorated rent amount from your security deposit, you have the same dispute options as with any wrongful deposit deduction. See your state's rules on the security deposit tool — most states require landlords to return deposits with an itemized breakdown within 14–30 days of move-out.
Month-to-Month Leases vs. Fixed-Term Leases
Move-out proration works the same way regardless of whether you have a month-to-month or fixed-term lease. The difference is in the notice period:
- Month-to-month: Most states require 30 days written notice to end a month-to-month tenancy. Your proration is calculated from the first of your final month through your last day.
- Fixed-term lease: Your end date is set in the lease. If it falls mid-month, proration applies automatically to your last month.
- Early termination: If you're breaking a fixed-term lease early, proration applies to the final partial month — but you may also owe an early termination fee. These are two different charges.
What to Do If Your Landlord Bills You for a Full Month
If you're moving out mid-month and your landlord sends you a bill for the full month, here's what to do:
- Calculate the correct prorated amount using our calculator and note the difference
- Check your lease for any language about final month billing or proration methods
- Contact your landlord in writing — email is fine — citing your move-out date, the correct prorated calculation, and the discrepancy
- Pay the correct prorated amount with a note that you are paying "in full for days occupied" if your landlord doesn't respond before your due date
- Keep all documentation — your move-out notice, key return confirmation, and all communications
If the dispute isn't resolved, a formal rent dispute letter is the next step. For amounts under your state's small claims limit, small claims court is an accessible and inexpensive option.
The Bottom Line
Moving out mid-month means you owe prorated rent for the days you occupied the unit — not a full month. The calculation uses the same methods as move-in proration, and the most common source of disputes is disagreement about what day your tenancy officially ended.
The single best thing you can do before moving out: get written confirmation from your landlord of your official last day and the prorated amount they expect. It takes one email and eliminates most potential disputes before they start.
Run your move-out proration now with our free calculator and know exactly what your final bill should be.