For landlords and tenants

    Prorated Rent Calculator

    Moving in or out partway through a month? Work out a fair partial month of rent by the days in the actual month, with the daily rate shown so both sides can see how it adds up.

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    Enter the rent and the move date to see the prorated amount.

    Calculated by the days in the actual month, the most common and fair method. Some leases prorate by a flat 30-day month instead, so check what your lease says.

    How prorating works

    When a tenancy begins or ends in the middle of a month, the tenant should only pay for the days they actually have the unit. The fair way to work that out is to divide the full monthly rent by the number of days in that specific month to get a daily rate, then multiply by the days occupied. Because months range from 28 to 31 days, calculating by the real month keeps the daily rate honest.

    Move-in versus move-out

    For a move-in, count from the move-in date to the last day of the month. For a move-out, count from the first of the month to the move-out date. The calculator handles both, and shows the days occupied, the days in the month, and the daily rate, so the number is easy to explain and easy to agree on.

    Put it in writing

    Prorated rent is one of those small details that causes friction when it is verbal and none when it is written down. Record the method, the daily rate, the days, and the total alongside the lease. Keeping rent and receipts and the lease record in one place means a partial first month never turns into a question three months later.

    Frequently asked questions

    How is prorated rent calculated?

    Divide the full monthly rent by the number of days in that month to get a daily rate, then multiply by the number of days the tenant actually occupies the unit. For a move-in, count from the move-in date to the end of the month. For a move-out, count from the first of the month to the move-out date.

    Should I prorate by the days in the month or by 30 days?

    Dividing by the actual number of days in the month is the most common and fair method, because the daily rate reflects that specific month. Some leases instead use a flat 30-day month. Both are used in practice, so the lease should say which method applies.

    Who pays prorated rent?

    Prorated rent usually comes up when a tenancy starts or ends partway through a month. The tenant pays only for the days they occupy the unit that month, with full rent in the months in between.

    Is prorated rent required by law in Ontario?

    Ontario does not set a single formula in legislation, but charging only for the days occupied is the fair and standard practice, and it is what most leases and tenants expect. Put the method and the amount in writing so there is no confusion later.

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