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📅 Prorated Rent Calculator

Calculate prorated rent for any move-in date. Automatic day count, daily rate, and move-in day comparison table for any month.

📍 Property Address (optional)
InputsYour Numbers
Lease Details
Monthly Rent?
$
Move-In Day (day of month)?
Month?
Year?
Pro Forma: Different Move-In Dates
Earlier Move-In Day?
As-Is AnalysisCurrent
Enter values to see results
Prorated Rent
--
due at move-in
Days in Month
--
calendar days
Days Occupied
--
move-in to month end
Daily Rent Rate
--
rent / days in month
Proration Calculation
Full Monthly Rent--
Days in Month--
Daily Rate = Rent / Days--
Days Occupied (move-in to end)--
Prorated Rent = Daily x Days--
Move-In Day Comparison
If Moved In Day 1--
If Moved In Day 10--
If Moved In Day 15--
If Moved In Day 20--
Pro FormaAfter Plan
Enter pro forma values
Earlier Move-In Prorate
--
more days occupied
Difference
--
earlier vs current
First Month Total
--
prorate + 1st full month
Landlord Annual Impact
--
if lease starts earlier
Move-In Day Analysis
Current Move-In Prorate--
Earlier Move-In Prorate--
Extra Rent (earlier move-in)--

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1
Enter Monthly Rent
The full monthly rent amount in the lease. Proration is based on this full amount divided by days in the move-in month.
2
Enter Move-In Day
The day of month the tenant takes possession. Day 1 = full month's rent. Day 15 = roughly half a month's rent.
3
Select Month and Year
Days vary by month (28-31). February in a leap year has 29 days. The calculator uses the exact days in the selected month.
4
Formula: Daily Rate x Days
Prorated rent = (Monthly Rent / Days in Month) x (Days in Month - Move-In Day + 1). Day 15 in a 30-day month = 16 days, not 15.
5
Use the Comparison Table
The table shows prorated rent for days 1, 10, 15, and 20. Useful for offering flexibility to prospective tenants or planning move-in dates.
6
First Month Total
At move-in, tenants typically pay: prorated rent for the partial month + first full month's rent + security deposit. The pro forma shows this total.

Prorated rent ensures tenants only pay for the days they actually occupy the unit during the first (and sometimes last) month of a lease. The formula: (Monthly Rent ÷ Days in Month) × Days Occupied.


A tenant moving in on the 15th of a 30-day month pays for 16 days (day 15 through day 30 inclusive). At $1,600/month, the daily rate is $53.33 and the prorated amount is $853.33.


Best practice: collect prorated first month rent, first full month's rent, and security deposit at lease signing. This ensures the tenant is paid up before keys are handed over.

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