If you have fallen behind on your mortgage payments, a Chapter 13 can save your home by enabling you to repay the missed mortgage payments over a 3 or 5 year period. Most people don’t have the ability to cure the mortgage default by making a lump sum payment, or by making double payments every month. Most people do have the ability to make up the missed mortgage payments over a 3 or 5 year period however.
In addition to curing the mortgage default, your unsecured debt will be discharged as well (with certain exceptions), which will make it easier for you to manage your monthly bills.
If your mortgage company has filed a foreclosure lawsuit against you, the Chapter 13 will immediately stop the foreclosure from proceeding and give you a chance to cure the default as described above.
While in the Chapter 13, you can also apply for a mortgage modification.