Prorated Rent Calculator

There are two common methods and they give slightly different results. The actual-days method divides the rent by the real number of days in that specific month — 28, 30, or 31 — which is the most accurate and the most widely accepted. The banker's method always divides by 30 regardless of the month, which is simpler but slightly favours the tenant in longer months. A few leases divide the annual rent by 365 and multiply by the days occupied. Whichever your lease specifies is the one to use; if it is silent, the actual-days method is the usual default. This calculator lets you set the days-in-month value, so you can match either convention.

Count every day the tenant has the right to occupy the unit, including the move-in day itself. If someone moves in on the 20th of a 30-day month, they occupy the 20th through the 30th, which is 11 days, not 10 — a common off-by-one slip. For a move-out, count from the first of the month up to and including the last day of tenancy. When you are unsure whether to include the final day, check the lease, since some count the move-out day and some do not. Enter your day count in the calculator and it applies the daily rate to exactly that many days.

Yes. Once you know the prorated figure, you can issue a receipt or invoice that shows the monthly rent, the daily rate, the number of days charged, and the prorated total, so the tenant sees clearly how the partial amount was worked out. A transparent breakdown like this prevents disputes and gives both sides a record for their files. Build the document in the Receipt Caker generator, add a line describing the prorated period, and export a PNG or PDF. The calculator handles the maths; the generator turns it into a clean, shareable receipt.