The short version
- Prorated rent charges a tenant only for the days they occupy the unit in a partial month.
- There are three common methods: actual days in the month, a 365 day year, and a 30 day month. Each gives a slightly different number.
- The difference between methods is usually small, but it adds up across a portfolio and can cause disputes if the lease does not say which one you use.
- Pick one method, write it in the lease, and use it every time.
- Decide in advance how you handle a move-in late in the month, such as collecting the partial month together with the next full month.
Leases rarely start neatly on the 1st. A tenant gets the keys on the 18th, or a lease ends on the 12th. Prorated rent is how you charge for just the days in that partial month.
The idea is simple, but the math has more than one correct answer. Three methods are common, and each produces a slightly different amount. That is fine, as long as you pick one and use it consistently.
The three methods
All three start by working out a daily rate, then multiply it by the number of days the tenant occupies the unit. They differ in how they calculate the daily rate.
| Method | Daily rate | Strength | Weakness |
|---|---|---|---|
| Actual days in the month | Monthly rent divided by days in that month | Easy to explain; matches the calendar | Daily rate changes month to month |
| 365 day year | Monthly rent times 12, divided by 365 | Same daily rate all year | Slightly harder to explain |
| 30 day month | Monthly rent divided by 30 | Simple, one rate | Can overcharge in February and undercharge in 31 day months, or the reverse |
Worked examples
Take a unit that rents for $1,800 a month. We will calculate the first month’s rent for three different move-in dates, counting the move-in day as occupied.
Move-in on June 20 (30 day month)
The tenant occupies June 20 through June 30, which is 11 days.
| Method | Daily rate | Prorated rent |
|---|---|---|
| Actual days | $1,800 / 30 = $60.00 | $660.00 |
| 365 day year | $21,600 / 365 = $59.18 | $650.96 |
| 30 day month | $1,800 / 30 = $60.00 | $660.00 |
Move-in on July 20 (31 day month)
July 20 through July 31 is 12 days.
| Method | Daily rate | Prorated rent |
|---|---|---|
| Actual days | $1,800 / 31 = $58.06 | $696.77 |
| 365 day year | $59.18 | $710.14 |
| 30 day month | $60.00 | $720.00 |
Move-in on February 20 (28 day month)
February 20 through February 28 is 9 days.
| Method | Daily rate | Prorated rent |
|---|---|---|
| Actual days | $1,800 / 28 = $64.29 | $578.57 |
| 365 day year | $59.18 | $532.60 |
| 30 day month | $60.00 | $540.00 |
The spread is widest in February, about $46 here. For a single tenant that is small, but if you manage dozens of move-ins a year, or if a tenant compares notes with a neighbor, it helps to have a consistent rule.
You can run these numbers for any rent and date with our prorated rent calculator, and the definition page on prorated rent covers the basics.
Rounding
Round to the cent, and round the final amount, not the daily rate. Rounding the daily rate first and then multiplying can drift a few cents or more over many days. If you prefer whole dollars, say so in the lease and round the final number the same way each time.
Late month move-ins
A move-in on the 27th creates an awkward situation. The tenant owes a few days of prorated rent, and then full rent is due a few days later on the 1st. Two common ways to handle it:
- Collect both at signing. The tenant pays the prorated amount for the partial month plus the first full month before getting the keys. This is common and keeps the first rent cycle clean.
- Add the partial month to the next month’s rent. The tenant pays nothing extra at move-in, and the next rent charge includes the prorated days. This is easier on the tenant’s cash but means your first collection is larger and riskier.
Pick one approach for move-ins after a set day, such as the 20th, and put it in your leasing process.
Move-out proration
Proration at move-out depends more on the lease and local law than on math. If a tenant gives proper notice that ends mid-month, some leases and states require you to prorate the final month, while others allow notice to run to the end of a rental period. If a tenant leaves early without proper notice, different rules apply, including your duty in many states to try to re-rent the unit.
When you do prorate at move-out, use the same method you use at move-in. Count from the 1st through the last day of the tenancy.
Recording prorated rent
On the ledger, post the prorated charge as rent with a clear description, such as “Rent, June 20 to 30 (prorated, 11 days).” That way anyone reading the ledger, including the tenant, can see exactly what the charge covers. Your rent roll and income reports will then show the partial month accurately.
In TenantLoop, rent charges post to the lease ledger and flow into the books for that property, so prorated amounts show up correctly in your rent roll and financial reports without a separate entry. Tenants see the charge and its description in their portal before they pay.
Lease wording
A short clause removes most disputes:
If this lease begins on a day other than the first day of a month, rent for the first partial month will be prorated using the number of days in that month and is due at lease signing. The first day of the lease counts as a day of occupancy.
Our residential lease agreement template includes a rent section you can adapt with your chosen method, and the month to month rental agreement template can carry the same clause.
Common mistakes
- Not naming a method. Leaves room for a tenant to argue for the cheapest result.
- Switching methods between tenants. Inconsistency looks unfair even when every number is defensible.
- Forgetting the move-in day. Decide whether it counts, and write it down.
- Prorating other charges inconsistently. If you prorate rent, decide whether you also prorate pet rent, parking and other monthly charges.
Proration checklist
- Choose a method: actual days, 365 day year or 30 day month
- Write the method in the lease, including whether the first day counts
- Set a rule for late month move-ins
- Round only the final amount
- Use a clear ledger description with the dates and number of days
- Apply the same method at move-out when proration applies
Note: This is general information. Rules on move-out proration and notice periods vary by state, so check your local law before you rely on a lease clause.
Before you try it on a tenant.
Is a landlord required to prorate rent?
Not always. Whether you must prorate depends on the lease and on state law. Many landlords prorate the first month as a matter of fairness. At move-out, prorating usually depends on the notice rules and the lease terms.
Which proration method is most common?
The actual days in the month method is widely used because it is easy to explain: divide the month's rent by the number of days in that month, then multiply by the days occupied. What matters most is that the lease names the method.
Do I count the move-in day?
Usually yes. Most landlords charge from the day the tenant gets the keys or the lease starts, and that day counts as an occupied day. State this in the lease to avoid confusion.
How do I prorate rent for a move-out?
Use the same method as for move-in, counting the days from the 1st through the last day of the tenancy. Whether you owe a prorated refund depends on the lease, the notice given and your state's rules.