Landlords use different methods: days in the actual month, a 30-day “banker’s month” or an annual daily rate. The difference is usually small, but check your lease.
How to use the Prorated Rent Calculator
- Moving in or out?
- Moving date
- Basic monthly rent
- Method
Results update as you type, and every field accepts the units shown in its menu.
How it works
Choose whether you are moving in or out, the date and the monthly rent, and the method.
Tips
- Get a written loan estimate and compare the APR, not just the interest rate.
- Include property tax, insurance, HOA fees and maintenance in your monthly budget.
- A larger down payment lowers the payment and can remove mortgage insurance.
- Rates change daily – use a current quote for the most accurate result.
Common mistakes to avoid
- Looking only at the monthly payment instead of the total cost of the loan.
- Forgetting closing costs and fees.
- Assuming home prices always rise.
Inputs explained
| Field | What to enter |
|---|---|
| Moving in or out? | Choose one: Moving in, Moving out |
| Moving date | A date |
| Basic monthly rent | Amount in your currency |
| Method | Choose one: Days in that month, Yearly rent ÷ 365, 30-day month |
What each result means
- Days in the month = date(year([Moving date]), month([Moving date]) + 1, 1) – [First of the month]
- Prorated rent = [Daily rent]×[Days charged]
Example values
How the main result changes when Basic monthly rent changes and everything else stays at the example values above:
| Basic monthly rent | Prorated rent |
|---|---|
| 900 | 29.03 |
| 1,350 | 43.55 |
| 1,800 | 58.06 |
| 2,250 | 72.58 |
| 2,700 | 87.1 |
| 3,600 | 116.13 |
Formula
Daily rent = monthly rent ÷ days in the month (or × 12 ÷ 365, or ÷ 30)Moving in: prorated rent = daily rent × days from move-in to month end (inclusive)Moving out: daily rent × days from the 1st to move-out (inclusive)Worked example
Inputs — Moving in or out?: Moving in; Moving date: 2026-10-31; Basic monthly rent: $1,800; Method: Days in that month.
Results — Days in the month = 31; Days charged = 1; Daily rent = $58.06; Prorated rent = $58.06.
Frequently asked questions
How is prorated rent calculated?
Daily rent × the days you occupy the unit that month.
Does the move-in day count?
Usually yes – it's included in the days charged.
Is prorated rent required by law?
Not everywhere; it depends on your lease and local law.
What formula does the Prorated Rent Calculator use?
Daily rent = monthly rent ÷ days in the month (or × 12 ÷ 365, or ÷ 30).