Not all debts are discharged. The debts discharged vary under each chapter of the Bankruptcy Code.

Section 523(a) of the Code specifically excepts various categories of debts from the discharge granted to individual debtors. Therefore, the debtor must still repay those debts after bankruptcy. Congress has determined that these types of debts are not dischargeable for public policy reasons (based either on the nature of the debt or the fact that the debts were incurred due to improper behavior of the debtor, such as the debtor's drunken driving).
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There are 18 categories of debt excepted from discharge under chapters 7, 11, and 12. A more limited list of exceptions applies to cases under chapter 13. Generally speaking, the exceptions to discharge apply automatically if the language prescribed by section 523(a) applies.

The most common types of non-dischargeable debts are certain types of tax claims, debts not set forth by the debtor on the lists and schedules the debtor must file with the court, debts for spousal or child support or alimony, debts for willful and malicious injuries to person or property, debts to governmental units for fines and penalties, debts for most government funded or guaranteed educational loans or benefit overpayments, debts for personal injury caused by the debtor's operation of a motor vehicle while intoxicated, and debts for certain condominium or cooperative housing fees.

The types of debts described in sections 523(a)(2), (4), (6), and (15) (obligations affected by fraud or maliciousness or certain debts incurred in connection with property settlements arising out of a separation agreement or divorce decree) are not automatically excepted from discharge. Creditors must ask the court to determine that these debts are excepted from discharge. In the absence of an affirmative request by the creditor and subsequent granting of the request by the court, the types of debts set out in sections 523(a)(2), (4), (6), and (15) will be discharged.

A broader discharge of debts is available to a debtor in a chapter 13 case than in a chapter 7 case. As a general rule, the chapter 13 debtor is discharged from all debts provided for by the plan except certain long-term obligations (such as a home mortgage), debts for alimony or child support, debts for most government funded or guaranteed educational loans or benefit overpayments, debts arising from death or personal injury caused by driving while intoxicated or under the influence of drugs, and debts for restitution or a criminal fine included in a sentence on the debtor's conviction of a crime. Although a chapter 13 debtor generally receives a discharge only after completing all payments required by the court-approved (i.e., "confirmed") repayment plan, there are some limited circumstances under which the debtor may request the court to grant a "hardship discharge" even though the debtor has failed to complete plan payments. Such a discharge is available only to a debtor whose failure to complete plan payments is due to circumstances beyond the debtor's control.

The scope of a chapter 13 "hardship discharge" is similar to that in a chapter 7 case with regard to the types of debts that are excepted from the discharge. A hardship discharge also is available in chapter 12 if the failure to complete plan payments is due to "circumstances for which the debtor should not justly be held accountable."