Five Categories of Non-Performing Loans Under Circular 31/2024/TT-NHNN: Understanding Them Correctly to Avoid Legal and Financial Risks
- Luật sư Trần Văn Long

- Nov 24
- 4 min read
In banking activities, debt classification is not only a risk-management requirement but also an important legal basis for determining borrowers’ obligations, credit institutions’ responsibilities, and the overall safety of the financial system. Circular 31/2024/TT-NHNN establishes a mechanism for debt classification based on quantitative methods, thereby enhancing credit transparency and limiting the formation of bad debts.
1. Legal Basis for Debt Classification under Circular 31/2024/TT-NHNN
Clause 1 Article 10 of Circular 31/2024/TT-NHNN provides for debt classification using quantitative methods, dividing debts into five groups, from standard debt (Group 1) to potentially irrecoverable debt (Group 5). This regulation directly affects:
Borrowers’ rights and obligations;
Banks’ provisioning policies;
Assessments of corporate financial health;
Customers’ access to future financing.
These criteria are mandatory for banks and non-bank credit institutions.
2. Detailed Analysis of the Five Debt Groups
2.1. Group 1 – Standard Debt: “Good Credit Health”
Legal basis: Point a, Clause 1, Article 10 of Circular 31/2024/TT-NHNN.
Includes:
Debts that are within the due date and assessed as fully recoverable (principal + interest).
Debts overdue for fewer than 10 days but still considered fully recoverable.
Debts eligible for inclusion in Group 1 under the reclassification mechanism in Clause 2, Article 10.
Group 1 reflects the highest level of creditworthiness. Notably, debts overdue for fewer than 10 days may still be classified as Group 1, a new customer-friendly point that prevents minor delays from negatively affecting credit history.
2.2. Group 2 – Debts Needing Attention: “Early Warning Signals”
Legal basis: Point b, Clause 1, Article 10.
Includes:
Debts overdue up to 90 days.
Debts with the first repayment schedule adjustment but still within the modified due date.
Debts classified into Group 2 under Clauses 2 and 3.
Group 2 is a “grey zone” with potential risks. Many businesses underestimate its impact because Group 2 is not considered bad debt. However, once classified as Group 2:
Customers face reduced access to credit;
Banks may impose tighter lending conditions;
Customers are subject to stricter monitoring.

2.3. Group 3 – Sub-standard Debt: “Beginning of Bad Debt Classification”
Legal basis: Point c, Clause 1, Article 10.
Typical cases:
Debts overdue 91–180 days.
Debts extended for the first time.
Debts with interest exemptions or reductions due to insufficient repayment capability, except in special cases.
Debts violating Articles 134, 135, and 136 of the Law on Credit Institutions.
Debts ordered to be recovered under inspection conclusions but still within the recovery timeframe.
From Group 3 onward, debts are considered bad debts. Group 3 indicates that the borrower’s financial balance has deteriorated and partial loss of capital may occur.
Importantly, Circular 31 tightens criteria: debts involving legal violations (Articles 134–136 LCI) must be classified as Group 3 even before becoming heavily overdue.
→ This shows a shift toward behavior-based risk management, not just time-based.
2.4. Group 4 – Doubtful Debt: “High Risk of Capital Loss”
Legal basis: Point d, Clause 1, Article 10.
Includes:
Debts overdue 181–360 days.
Debts restructured for the first time but overdue up to 90 days.
Debts restructured for the second time but not yet overdue.
Debts ordered for recovery but unrecovered after 30–60 days.
Group 4 debts pose a high risk of capital loss and may exceed the borrower’s financial capacity. Banks must:
Allocate high risk provisions;
Intensify debt collection measures;
Review the legal status of collateral.
2.5. Group 5 – Potentially Irrecoverable Debt: “Highest Risk Level”
Legal basis: Point đ, Clause 1, Article 10.
Includes:
Debts overdue more than 360 days.
Debts restructured for the first time but overdue more than 91 days.
Debts restructured for the second time and overdue.
Debts restructured for the third time or more.
Debts of customers who are credit institutions under special control.
Debts unrecovered after 60 days from the recovery decision.
Group 5 represents the loss zone, often leading to:
Litigation, collateral enforcement, compulsory recovery;
100% provisioning by banks;
Borrowers losing access to credit for many years.
3. Regulations on Downgrading and Upgrading Debt Groups: Flexible but Strict
Clause 2 Article 10 allows debts to be reclassified into lower-risk groups only when the borrower:
Has fully repaid overdue principal and interest for at least 1–3 months;
Provides sufficient supporting documents;
Is re-evaluated by the bank as having adequate repayment ability.
This rule provides a “way out” for good-faith borrowers but requires strict proof, protecting banks while still offering opportunities for customers.
Conversely, Clause 3 Article 10 allows banks to increase a borrower’s debt group when the customer:
Fails to provide complete information;
Shows signs of financial deterioration;
Is administratively sanctioned for credit-related violations.
This reflects a proactive risk-management approach, not solely dependent on overdue days.
4. Legal and Practical Implications for Customers and Banks
For customers
Significant negative impact on CIC credit records, making future borrowing difficult.
Possibility of early loan recall according to credit agreements.
Higher likelihood of collateral enforcement.
Businesses may lose commercial reputation with partners.
For banks
Debt classification directly influences provisioning levels.
Helps banks detect risks early and prevent bad debt formation.
Provides a legal basis for litigation and collateral enforcement.
5. Conclusion and Recommendations from VietLink Lawyers
Circular 31/2024/TT-NHNN establishes a stricter and more transparent debt assessment system to safeguard the financial system. However, borrowers should pay special attention to:
Avoid allowing loans to fall into Group 2 or higher;
Proactively provide financial information to banks;
Seek legal advice when their loans are at risk of being reclassified.
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