depends on the landlord. i suggest you start packing now!
If you mean, "how far behind on the rent does the person have to be", you can give a notice to quit when the rent is a day late.
a month later
The first month's rent pays for your first month in the apartment. You will owe the agreed-upon rent to the landlord the second month. I can't see why anything would be prorated--your security deposit cannot be used for rent.
If your rent is month-to-month, then you probably do not have to pay a full months rent for the month that you're moving out. However, if you're just moving in, having just signed a lease, then you're responsible for the rent during the entire term of the lease or until the landlord rents out the unit, which ever comes first.
If he accepts the rent he cannot evict you for non payment, but could ask you to leave based on constant tardiness of payment. If he doesn't accept the payments this means he is evicting you.
If there was a lease, the landlord has an obligation to try to rent it. Until then, the tenant owes the rent. If this was a month-to-month tenancy, the landlord should keep the first month's rent, and return the security deposit and last-month's rent, if any.
If you rent by the month, a month's rent unless the landlord has agreed to a lesser amount. If you rent by the week, 2 weeks' worth. If you rent by the day.....14 days' worth.
He spends 25% of his income on rent.
In America it was $5 per month in rent.
The first and last rule generally means that when you move-in you are required to pay your first month rent and your last month's rent. A security deposit may also be charged. But oftentimes your landlord will work with you in making security or last month's rent deposits. The difference between last month rent and a security deposit, both which can equal the same amount, is that the last month rent is used to apply to your last month of rent, while the security deposit is refunded to you provided you leave the apartment in good condition minus reasonable wear and tear. Your security deposit is generally not applied towards your last month's rent, especially if you did pay a last month's rent in advance.
Yes, it can be, if rent for the following month is not paid prior to the month end. if not, you put it under prepaid rent because you already paid for it.
You pay in advance.