That depends. Usually most Property Managers and Property Owners want to make sure that the potential tenants have the ability to make their rental payments so it is typical that the Managers/Owners will require that you make 2 1/2 to 3 times the amount of the rent in income. Of course, that is only part of the whole equation. Credit, Bank Accounts, Employment, References and even formal Landlords may be verified and contacted.
The best advise is just be upfront. If you have lost a home to foreclosure, that does not always disqualify you, (many people have lost their homes in the last few years and are great tenants) but if you have never paid a bill on time in your life...well, that may be more challenging.
Good luck :-)
Eddie de Leon