Last Updated: October 2026 | Read time: 5 minutes
Prorated rent is the portion of a month's rent you owe when you move in or move out partway through the month, calculated by the day. Landlords usually work it out one of two ways, by the actual number of days in that month or by a flat 30-day month, and a few use a 365-day year. Whether proration is required depends on your lease and state or local law. Confirm the terms before signing.
Prorated rent is the portion of a month's rent you owe when you move in or move out partway through the month, calculated by the day.
If your rent is prorated, you pay for the days you live there that month. For example, if you move into an apartment halfway through the month, your landlord may charge you for the remaining days rather than the entire month's rent.
Not all landlords have to offer prorated rent. Before you sign a lease, ask your landlord whether they'll adjust your rent if you move in late or move out early. If they say yes, get the agreement in writing. Your lease agreement should make the terms clear so you know how the calculation works and what you'll owe.
Prorated rent can come up whenever your rental period covers only part of a month. The most common situations are a mid-month move-in or move-out.
If your lease starts on the first day of the month, you generally won't have a partial first month to calculate. But if your lease starts later, your landlord may calculate a prorated amount for the days remaining in that month.
The same idea can apply when you move out before the end of a month. However, moving out early doesn't automatically mean you owe only a prorated amount. Your lease may require you to pay rent through a specific date or may include other terms for ending the tenancy early. Check your lease before assuming you'll receive a reduction.
A delayed or mid-month start can also affect how your first payment is handled. If you're considering a flexible rental arrangement, a month-to-month lease may have different terms from a fixed-term lease, so review the agreement carefully.
There are three common ways to calculate prorated rent:
The method your landlord uses can change your daily rate and your total prorated rent. Check your lease to see which calculation applies.
For the examples below, we'll use the same monthly rent of $1,650 and the same 15 days of rent so you can see how the methods compare. Say you move in on October 17. Counting your move-in day through October 31, you owe 15 days of rent.
This method divides your monthly rent by the actual number of days in the month. A 31-day month, for example, uses 31 as the divisor. A 30-day month uses 30, while February uses 28 or 29.
Formula: Monthly rent ÷ number of days in the month × days of rent owed = prorated rent
For example, if your rent is $1,650 and you owe 15 days of rent in a 31-day month:
$1,650 ÷ 31 × 15 = $798.39
Your daily rate is about $53.23, and your prorated rent for 15 days is $798.39.
This method changes the daily rate depending on the month. The daily rate is lower in a 31-day month and higher in a shorter month. In February, the same rent gives a higher daily rate.
Some landlords use a flat 30-day month, regardless of whether the calendar month has 28, 29, 30, or 31 days. This is sometimes called a banker's month.
Formula: Monthly rent ÷ 30 × days of rent owed = prorated rent
Using the same $1,650 rent and 15 days of rent:
$1,650 ÷ 30 × 15 = $825.00
The daily rate is $55.00, so 15 days of prorated rent would be $825.00.
The flat 30-day method keeps the daily rate consistent from month to month. The tradeoff is that the calculation doesn't reflect the actual number of days in the calendar month.
The 365-day method calculates a daily rate from your annual rent rather than treating each month separately.
Formula: Monthly rent × 12 ÷ 365 × days of rent owed = prorated rent
For the same $1,650 monthly rent and 15 days of rent:
$1,650 × 12 ÷ 365 × 15 = $813.70
That gives you a daily rate of about $54.25 and a prorated amount of $813.70 for 15 days.
You may also see a 30.42-day average month used to calculate a daily rate. That's the same annual calculation, because 365 days ÷ 12 months is about 30.42 days, so this guide counts three methods.
Your lease should tell you how your landlord calculates prorated rent. If it doesn't, ask before you sign rather than assuming which method applies.
Here's how the three methods compare using the same $1,650 monthly rent and 15 days of rent:
| Method | Daily Rate on $1,650 Rent | 15-Day Prorated Rent | When It's Used |
|---|---|---|---|
| Actual days in a 31-day month | $53.23 | $798.39 | When the lease uses the actual number of days in the month |
| Flat 30-day month | $55.00 | $825.00 | When the lease uses a 30-day or banker's-month calculation |
| 365-day year | $54.25 | $813.70 | When the lease calculates a daily rate from annual rent |
The same 15 days of rent costs anywhere from $798.39 to $825.00 depending on the method, a difference of $26.61. That's why it's worth checking your lease and confirming the calculation before you make a payment.
Your first month's rent may be prorated if your lease starts after the first day of the month. For example, if your lease begins partway through the month, your landlord may charge you only for the days covered by your initial rental period. Your first month's rent is payment for your rental period, so a partial first month can result in a partial rent charge.
Your security deposit and rental fees are separate from rent. Prorating your rent doesn’t automatically reduce your security deposit or one-time fees. Confirm those amounts separately. If you pay monthly pet rent, ask whether it's prorated too. A security deposit is money held separately from your rent, while fees are charges for specific services or parts of the rental process.
Before moving in, ask for an itemized breakdown of what you owe. Your move-in costs may include first month's rent, a security deposit, application fees, pet charges, or other permitted fees. Knowing which charge covers what can help you avoid surprises. For more on what to expect, see hidden costs of renting.
The best time to ask about prorated rent is before you sign your lease. Once you've signed, the terms of your agreement generally control what you owe, so it's much easier to negotiate a partial-month arrangement before committing.
If you want prorated rent, ask the landlord or property manager how they calculate it and when the payment is due. If you reach an agreement, get it in writing and make sure the terms appear in your lease or another written agreement.
Your lease agreement is the place to look for details about your rent, payment dates, lease term, and other responsibilities. Don't rely on a verbal promise if the amount you'll owe depends on it.
Usually no. Your lease and your state or local law decide whether a landlord has to prorate, so ask before you sign and get the answer in writing.
No. A security deposit is separate from rent and isn't prorated based on the number of days you occupy an apartment. Deposit rules vary by location, so review your lease and applicable local laws.
If your lease starts on the first day of the month, you generally don't have a partial first month to prorate. Your first month's rent would typically cover the full rental period stated in your lease.
Not automatically. Moving out before the end of a month doesn't necessarily mean your landlord has to reduce your rent. Your lease may require you to pay through a specific date or include other requirements for ending the tenancy early.
Check your lease for language describing how partial-month rent is calculated. It may specify the actual number of days in the month, a flat 30-day month, or a 365-day calculation. If the lease doesn't make the method clear, ask your landlord before making the payment.
Yes. Prorated rent is the amount charged for a partial rental period rather than a full month. The amount is calculated based on the number of billable days and the method specified in your lease.
You can always ask, but your landlord may not be required to agree to a change after you've signed the lease. If prorated rent matters to you, it's better to negotiate the terms before signing and get the agreement in writing.
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