You finally got the keys to your new place, but your lease starts on October 20. So do you really have to pay rent for the whole month of October?
In many cases, no. This is where prorated rent comes in. Prorated rent means you pay only for the days you actually live in the home that month, not the full month.
In this guide, we’ll explain what prorated rent means, when it applies, the three common ways landlords calculate it, and a few easy examples so you know exactly what to expect.
What Does Prorated Rent Mean?
“Prorated” simply means divided into a fair share based on the time used.
With rent, that means your monthly rent is split into a cost per day. You then pay only for the days you’re in the home.
Here’s a quick example. Your rent is $1,500 a month, and you move in on October 20. Instead of paying the full $1,500 for October, you pay only for the 12 days you live there that month.
Prorated rent can apply at two points:
- Your first month: when you move in after the 1st.
- Your last month: when your lease or notice ends before the month is over.
When Does Prorated Rent Apply?
Prorated rent usually comes up in these situations:
- Moving in mid-month: Your lease starts on a day other than the 1st.
- Moving out mid-month: Your lease or notice period ends partway through the month.
- Changing the rent due date: For example, a landlord who collects all rent on the 1st may prorate your first payment so you line up with everyone else.
- Renewals or unit transfers: Your new lease or new unit starts in the middle of the month.
One important thing to know: in most places, landlords don’t have to offer prorated rent. It usually depends on your lease and what you and your landlord agree to. That’s why it’s smart to ask about it before you sign.
How to Calculate Prorated Rent (3 Common Methods)
Every method starts with a daily rate. That’s your rent turned into a cost per day. Then you multiply that daily rate by the number of days you live in the home.
Landlords usually use one of these three methods:
| Method | Formula | What it means |
|---|---|---|
| Days in the month | Monthly rent ÷ days in that month × days you live there | Uses the real number of days in the month (28 to 31) |
| Yearly (365-day) | Monthly rent × 12 ÷ 365 × days you live there | Every day of the year costs the same |
| Banker’s month (30-day) | Monthly rent ÷ 30 × days you live there | Treats every month as if it has 30 days |
One Move-In, Three Different Answers
Let’s use the same move-in for all three methods so you can see how they compare.
- Monthly rent: $1,500
- Move-in date: October 20
- October has 31 days
- Days you’ll live there in October: 12 (from the 20th to the 31st, counting both days)
| Method | Daily rate | Prorated rent for October |
|---|---|---|
| Days in the month | $1,500 ÷ 31 = $48.39 | $580.65 |
| Yearly (365-day) | $1,500 × 12 ÷ 365 = $49.32 | $591.78 |
| Banker’s month | $1,500 ÷ 30 = $50.00 | $600.00 |
The totals are worked out before rounding, so multiplying the rounded daily rate may be off by a few cents.
As you can see, the same move-in can cost anywhere from about $581 to $600 depending on the method. None of these methods is “wrong,” but it’s fair to ask which one your landlord uses and to get it in writing.
Move-Out Example
Prorated rent works the same way when you move out. Let’s say:
- Monthly rent: $1,500
- Your lease ends February 10
- February has 28 days
- Days you’ll live there in February: 10
Using the days-in-the-month method: $1,500 ÷ 28 × 10 = $535.71.
How to Figure Out Your Prorated Rent, Step by Step
- Count your days. Count every day you’ll live in the home that month, including your move-in day.
- Find your daily rate. Use the method your landlord uses. If you’re not sure, ask.
- Multiply. Daily rate × number of days = your prorated rent.
- Check with your landlord. Confirm the amount and the due date before you pay.
Is a Landlord Required to Prorate Rent?
Usually, no. In most places, prorating rent is a common practice, not a legal must. Whether you get prorated rent depends on your lease and what you and your landlord agree to.
Some cities or states may have their own rules, so it’s worth checking your local laws. The best time to ask is before you sign the lease, not after you’ve moved in.
Tips for Renters and Landlords
If you’re a renter:
- Ask whether your first month will be prorated.
- Ask which method the landlord uses and when the prorated amount is due.
- Get the amount in your lease or in writing.
- Plan your move-in date with prorated rent in mind. If you’re still waiting to hear back on an application, it helps to know how long it takes to get approved for an apartment so you can pick a realistic start date.
If you’re a landlord:
- Choose one method, write it in your lease, and use it for every tenant. Using the same method for everyone keeps things fair and simple.
- Show the math on the move-in or move-out statement so the tenant can check it.
- Add proration to your standard move-in process, along with the other items on a first-time landlord checklist.
Local Update: Prorated Rent in Montana
If you rent or own a rental in Kalispell, Whitefish, Columbia Falls or anywhere in the Flathead Valley, here’s how Montana law fits in:
- No set method in state law: Montana’s rules on rental agreements (MCA 70-24-201 through 70-24-205) don’t say how rent must be prorated. Your lease and what you agree to decide it.
- When rent is due: If the lease doesn’t say otherwise, rent is due at the start of each rental period, which isn’t always the 1st of the month (MCA 70-24-201).
- Month-to-month notice can end mid-month: Either side can end a month-to-month rental with at least 30 days’ written notice. The rental ends on the date in the notice, even if that date falls in the middle of a rent period (MCA 70-24-441). This is a common time for proration to come up, so agree on the final amount in writing.
- If a tenant moves out early and the home is re-rented: The old lease ends on the date the new tenancy starts (MCA 70-24-426). That date can also fall in the middle of a month.
To learn more about rental rules in the state, read our guide to Montana landlord tenant law.
Frequently Asked Questions
What happens if you move in in the middle of the month?
Many landlords will prorate your first month’s rent, so you pay only for the days you live there. Some may ask for a full month instead, so check your lease.
How does prorated rent work?
Your monthly rent is turned into a daily rate. You then pay that daily rate for each day you live in the home during a partial month.
Is prorated rent based on 30 or 31 days?
It depends on the method. The days-in-the-month method uses the real number of days (28 to 31). The banker’s month always uses 30, and the yearly method uses 365 days in a year.
When do you pay prorated rent?
It’s usually paid at move-in, along with your deposit, or with your last rent payment when you move out. Your lease or landlord will tell you the exact date.
Do I have to pay prorated rent when I move out?
If your lease or notice ends partway through the month, you’ll usually pay only for the days until that date. Some leases require rent through a full month, so read yours carefully.
Can a landlord refuse to prorate rent?
In most places, yes. Prorating is usually up to the lease and what you both agree to. That’s why it’s best to ask before you sign.
The Bottom Line
Prorated rent is a fair way to pay for a partial month. Before you move in or out, ask your landlord if they prorate, which method they use, and when it’s due. Then check the math and keep it in writing.
Once your rent is sorted, you can focus on the fun part: getting settled in. If you’re planning the move now, here’s a simple guide on what to pack first when moving house.
For owners who’d rather not handle move-in math, lease details and rent collection themselves, it may be worth hiring a property manager.
