LandlordGauge

Rent apportionment calculator

Calculate partial-period rent with calendar and annual/365 methods side by side. See the daily rate, inclusive dates and assumptions. Free UK tool.

Your rent and dates

The rent for one complete period selected below.

First to last day of the calendar month. This assumes calendar boundaries, not a different rent due day.

Start or end date

Start: this date to the period end. End: period start to this date.

Format: DD/MM/YYYY

This date is counted. Only the calendar period containing this date is calculated.

Both methods remain visible. Annual/365 keeps 365 in leap years.

Your apportioned rent

Example result

Apportioned rent

£387.10Calendar method

Daily rate

£38.71

10 days from 1 March 2027 to 10 March 2027, including both dates, give £387.10 using your selected method.

Both methods side by side

The same 10 days under each method
MethodDaily rateApportioned rent
Calendar month£38.71£387.10
Annual / 365£39.45£394.52

Example figures.

Assumed period: 1 March 2027 to 31 March 2027. Calendar uses the actual period length; annual/365 uses a fixed 365-day divisor. Rates as of