Prorated Rent Calculator
Prorated rent is the amount you pay when your tenancy starts or ends part way through a month. This calculator works out a daily rate from your monthly rent, then multiplies it by the number of days you are paying for, so you can see what the part month should cost.
Enter the monthly rent, the daily rate method, the number of days in the month and the number of days you pay for. The calculator shows your prorated rent and the daily rate it used. Your lease may specify which method to use, so check it before you rely on the result.
How to use the prorated rent calculator
- Enter the monthly rent in pounds in the Monthly rent box.
- Choose how the daily rate is worked out. Pick the days in that month option if your lease uses the calendar month, or the annual method if your lease uses it.
- Enter the number of days in the month in the Days in the month box.
- Enter the number of days you pay for in the Days you pay for box.
- Read the Prorated rent figure and the Daily rate figure shown by the calculator.
- Compare the result with your lease or tenancy agreement, and check any figure that matters with your landlord or letting agent.
The formula
- Daily rate = monthly rent ÷ days in the month, or monthly rent × 12 ÷ 365
- Prorated rent = daily rate × days you pay for
- Your lease may say which method to use
Worked example
The figures below are made up to show the maths. They are not current prices, rates or product figures.
| Monthly rent | £1,500.00 |
|---|---|
| Daily rate from | The days in that month |
| Days in the month | 30 days |
| Days you pay for | 12 days |
- Prorated rent £600.00
- Daily rate £50.00
Tips for an accurate answer
- Check your lease first. It may say which daily rate method to use, and that method overrides the default in this calculator.
- Count the days carefully, including both the first and last day if your agreement counts them. A single day can change the total.
- Use the number of days in the actual month you are working in, not an average, so the daily rate matches the calendar.
- Keep your own record of the rent you have paid, so you can match it against the figure this calculator gives.
- This is a calculation tool, not financial advice. Confirm the final amount with your landlord, letting agent or lender where it matters.
Questions people ask
How to calculate prorated rent payment?
Enter the monthly rent and the number of days in the month, then enter the number of days you pay for. The calculator divides the monthly rent by the days in the month to get a daily rate, then multiplies that rate by your days. The result is your prorated rent.
How do I calculate my pro rata pay?
Enter your monthly rent, the days in the month and the days you are paying for. The calculator finds the daily rate from the monthly rent and multiplies it by your days to give the part month amount. Check the method against your lease if it specifies one.
What does this calculator actually work out?
It works out a daily rate from your monthly rent, then multiplies that rate by the number of days you pay for. The result is your prorated rent for the part month. It also shows the daily rate it used so you can check the working.
Which daily rate method should I choose?
Choose the days in the month method if your lease divides the monthly rent by the number of days in that month. Choose the annual method if your lease works from a yearly figure. If your lease does not say, ask your landlord or letting agent.
Do I need to enter the days in the month?
Yes, if you use the days in the month method, because the daily rate is the monthly rent divided by that number. The annual method uses a fixed year length instead, so the figure you enter there does not change the daily rate.
Can I use this for any month?
Yes. Enter the actual number of days in the month you are working in, which varies between months. The calculator then uses that number to set the daily rate for that month.
Sources
This calculator uses the standard loan and interest formulas above and the numbers you type. It needs no outside figures.
An estimate from the numbers you enter, worked out with the formula shown. It is maths, not financial advice: your lender or bank has the final figures. Page checked 23 Oct 2026. Read the disclaimer