Prorated Rent Calculator

The Prorated Rent Calculator works out how much rent you owe for a partial month when you move in or move out partway through the month. Instead of paying for a whole month you have not lived through, it finds your daily rent rate and multiplies it by the exact number of days you occupy the place. It also compares the three common proration methods side by side and shows a calendar of the days you are responsible for — so you can check a landlord's figure or work out a fair number yourself.

What is prorated rent?

Prorating means dividing a cost in proportion to how much of it you actually use. Prorated rent is the slice of a full month's rent that matches the days you live in a rental during a partial first or last month. If you move in on the 15th, you should normally only pay for the 15th to the end of the month, not the whole thing.

Prorated Rent Formula

Every method follows the same two steps — find a daily rate, then multiply by the days you occupy. The methods differ only in what number they divide the monthly rent by.

The Three Proration Methods

Prorated Rent Example

Suppose your rent is 1,500 a month and you move in on March 15. March has 31 days, so you occupy 17 days (the 15th through the 31st):

The same move-in date produces three different bills — a spread of about 27 in this example. That is exactly why this calculator shows all three at once and highlights the one your lease specifies.

Move-In vs. Move-Out

• Moving in: you pay from your move-in day through the last day of the month. Days occupied = (days in month − move-in day + 1).
• Moving out: you pay from the first of the month through your move-out day. Days occupied = move-out day. This tool counts the move-out day itself as occupied, which is the most common convention.

What Prorated Rent Does Not Include

Proration only covers the partial month of rent. It does not include your security deposit, first and last month's rent held in advance, application or admin fees, utilities, parking, or pet rent. Treat those as separate move-in costs.

How to Use This Calculator

1. Enter your monthly rent and pick your currency symbol.
2. Choose move-in or move-out so the tool knows which part of the month you owe for.
3. Pick the date — month, day, and year of your move.
4. Select the proration method set by your lease (or leave it on actual days).
5. Review the result: the prorated rent due, the daily rate, a calendar of your occupied days, the share of the month you pay for, and a side-by-side comparison of all three methods.

Frequently Asked Questions

What is prorated rent?

Prorated rent is a partial rent payment for the days you actually occupy a rental when you move in or out partway through a month. Instead of paying a full month, you pay a daily rate multiplied by the number of days you live there during that month.

How is prorated rent calculated?

First divide the monthly rent by a number of days to get a daily rate, then multiply by the days you occupy. The daily rate can be based on the actual number of days in that month, a flat 30-day month, or the monthly rent times 12 divided by 365. The method is usually set by your lease.

Which proration method should I use?

Use whatever your lease specifies. If the lease is silent, the actual-days method is the most calendar-accurate and is required in some jurisdictions. The flat 30-day method is common and simple but slightly overcharges in 31-day months. The 365-day annual method gives a true average daily rate across the year.

Is the move-out day counted as occupied?

This calculator counts the move-out day itself as a day you are responsible for, which is the most common convention. If your lease ends the day before you hand back the keys, subtract one day from the result.

Does prorated rent include a security deposit?

No. Prorated rent only covers the partial month of rent. Security deposits, first and last month's rent, application fees, and other move-in costs are separate and are not included in this calculation.

Can a landlord charge a full month instead of prorating?

Rules vary by location and by lease. Many leases and local laws require proration for a partial first or last month, but some month-to-month or fixed-term agreements do not. Always check your lease and local tenancy laws before assuming a full month is owed.

Additional Resources

• Renting - Wikipedia
• Lease - Wikipedia