# Prorated Rent Calculator

- **URL:** https://codeasystem.com/calculators/everyday/prorated-rent-calculator/
- **Category:** everyday
- **Description:** Compute fair partial-month rent for a mid-month move-in or move-out, with the daily rate shown.
- **Primary output:** Prorated rent for 15 days: $1,000.00

## Inputs
- Monthly rent (name: `rent`, type: number, prefix: $, example: 2000)
- Move-in day of month (name: `moveInDay`, type: number, example: 16)
- Days in that month (name: `daysInMonth`, type: number, example: 30)

## Outputs
- Prorated rent for 15 days: $1,000.00
- Daily rate: $66.67 per day
- Full month rent: $2,000.00

## Formula / methodology
```
Daily rate = monthly rent ÷ days in month
Prorated rent = rent × (days in month − move-in day + 1) ÷ days in month
```

We divide the monthly rent by the actual number of days in the month to get a daily rate, then charge that rate for every day from the move-in date through the end of the month; the move-in day itself included, since the home is occupied from day one.

## Assumptions & limitations
- The move-in day itself is charged.
- Uses the actual calendar month length, not a banking 30-day month.
- Landlord lease terms override any calculation; confirm their convention.

## How to use
1. **Enter full monthly rent**; Use the base rent from the lease, excluding utilities or fees unless those also prorate.
2. **Set the move-in day**; The calendar day you take possession; usually the lease start date.
3. **Confirm the month length**; Adjust for 28-, 30- or 31-day months; February changes the daily rate noticeably.

## Example
Moving in on the 16th of a 30-day month means 15 chargeable days: at $2,000 monthly rent that is a daily rate of $66.67 and a prorated bill of $1,000.00.

Result for these inputs:

```
Prorated rent for 15 days: $1,000.00
```

## About this calculator
### Two conventions exist; ask which

Some landlords prorate on the actual calendar month; others always divide by 30 regardless of length, and a few charge a flat daily rate. Ours uses the real month, the most common convention, but your lease wording wins any disagreement.

### Move-out math mirrors it

The same calculation prices a mid-month departure: count days occupied through your final day, multiply by the daily rate, and request the remainder back where local law requires it.

### Watch the leap-year edge

February move-ins are the cheapest daily rents of the year under calendar convention; 28 days makes each day worth more, but you buy fewer of them. Net cost for identical occupancy windows barely differs.

## FAQs
### Is the move-in day itself charged?

Yes here; possession begins that day. Some landlords start charges the following day; check your lease addendum.

### Should security deposits prorate?

No. Deposits are fixed protections against damage, not usage fees; they stay whatever the lease states.

### Can I make my landlord use a different method?

You can negotiate anything before signing. Once signed, the lease method controls, even if it produces a different number than this calculator.

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Last updated: 2026-08-23 · Version: 1.0.0 · [HTML version](https://codeasystem.com/calculators/everyday/prorated-rent-calculator/)