What is the maximum tontine interest rate under Vietnamese law? (Updated 2026)
Decree 19/2019 caps interest-bearing hụi at 20%/year. Learn admin fines under Decree 144/2021, usury risk under Penal Code Art. 201, and a safe bidding checklist.
Participating in an auction tontine (hụi đấu giá / interest-bearing hụi) is a common way to put idle cash to work. Because each period’s bid is set by members competing for the pot, interest can climb fast—sometimes into loan-shark territory.
Vietnamese law does set a hard ceiling. Exceeding it can void excess interest in court, trigger administrative fines, and in extreme cases lead to criminal usury charges. This guide explains the 20%/year rule under Decree 19/2019/NĐ-CP, how it maps to the Civil Code, what happens if you breach it, and a practical checklist for organizers and members.
Note: this is general legal information for the public. It does not replace advice from a lawyer on a specific dispute.
1. The maximum legal interest rate for interest-bearing hụi
Tontine (họ / hụi / biêu / phường) organization is regulated by Decree 19/2019/NĐ-CP and the 2015 Civil Code.
Clause 1, Article 21 of Decree 19/2019/NĐ-CP states that interest in an interest-bearing chain is agreed by members or proposed by a member to take the pot at each opening period, but must not exceed 20% per year of the total value of the slots still to be contributed, minus slots already contributed, over the remaining life of the chain.
That 20%/year frame aligns with the general loan interest ceiling in Clause 1, Article 468 of the 2015 Civil Code.
What “20%/year” means in practice
| Point | Meaning |
|---|---|
| Ceiling | Annualized interest must stay ≤ 20%/year |
| Excess interest | The portion above the ceiling is typically void / unenforceable in a dispute |
| Organizer duty | You should stop or invalidate bids that push the chain over the frame |
| Member duty | “Super high return” marketing is a red flag, not a bargain |
You cannot lawfully run a chain where the effective annualized rate routinely sits above this number—even if every member “agreed” in a Zalo chat.
2. How interest shows up in auction hụi
In auction play, the winning bid (tiền bỏ thăm / kêu giá) is the interest share that live slots effectively earn by paying less that period. Dead slots (members who already took the pot) pay full face value with no interest deduction.
A rough intuition (not a substitute for the Decree formula):
- Compare the bid to remaining unpaid face value and remaining periods.
- Annualize that discount into a %/year figure.
- If the result exceeds 20%/year, the bid is legally risky.
Manual annualization is easy to get wrong when members hold multiple live / dead slots. See also: Auction pot calculation formulas and Live slot vs dead slot explained.
3. Consequences when interest exceeds the ceiling
If an organizer deliberately runs or promotes “cut-throat” rates above 20%/year, risk stacks in layers.
3.1. Civil unenforceability
In a civil dispute, a court may refuse to recognize interest above the legal frame. Members who relied on predatory bids can find the “extra yield” collapses when someone defaults.
3.2. Administrative fines (Decree 144/2021/NĐ-CP)
Under Decree 144/2021/NĐ-CP, failure to comply with interest rules for họ / hụi / biêu / phường can draw an administrative fine of about 2,000,000–5,000,000 VND for individuals (typically double for organizations). The fine is smaller than a collapsed chain—but it is an official signal that the playbook was unlawful.
3.3. Criminal usury (Penal Code Article 201)
If the rate exceeds five times the Civil Code maximum—i.e. more than 100%/year (20% × 5)—and illicit gain is ≥ 30,000,000 VND, organizers can face prosecution for usury in civil transactions under Article 201 of the 2015 Penal Code.
| Threshold | Rule of thumb |
|---|---|
| Civil interest frame | ≤ 20%/year |
| Admin exposure | Non-compliance with hụi interest rules → roughly 2–5 million VND fine (individual) |
| Criminal usury trigger | Interest > 100%/year and illicit gain ≥ 30 million VND |
| Possible penalties | Up to 3 years imprisonment or fines up to about 1 billion VND (per statute frames) |
Usury risk is separate from fraud / absconding charges such as Articles 174–175—see What crime is tontine snatching?.
4. Organizer checklist: keep bidding inside the law
Print this before period 1 and re-check when rules change:
- Write the interest / bid method in the opening agreement with numeric examples.
- Set a hard maximum bid that keeps annualized interest ≤ 20%/year.
- Declare any bid above the cap invalid—do not “let the room decide.”
- Publish live / dead slot payment tables each period so members see the math.
- Separate organizer commission (tiền thảo) from interest; commission is management pay when agreed, not an excuse to ignore the ceiling.
- Keep a ledger / receipts—screenshots alone are weak evidence.
- Refuse marketing that promises bank-beating “guaranteed” yields.
- Back up calculations in a shared digital tool so annualization is not guesswork.
Related legality overview: Is playing tontine legal?.
5. FAQ: interest, bids, and commission
Does every period’s bid have to equal exactly 20%?
No. The law sets a maximum. Healthy chains often bid far below the ceiling. The risk is repeatedly clearing or exceeding the annualized cap.
If members unanimously agree to 30%/year, is it fine?
No. Consent does not legalize excess interest. The excess portion is still exposed to being voided, and extreme rates can tip into admin or criminal territory.
Is organizer commission (tiền thảo) the same as interest?
No. Tiền thảo is agreed remuneration for organizing. Interest is the discount / yield embedded in auction bids. Stacking huge commission on top of predatory bids raises overall legal and collapse risk.
Do interest-free (hụi thảo) chains care about 20%/year?
The 20%/year rule primarily constrains interest-bearing chains. Interest-free groups still need clear ledgers and anti-fraud practices.
Can Huio “guarantee” a bid is legal?
No app replaces legal advice. What Huio can do is make period math and cash-flow history visible and auditable, so you notice when bids leave the safe zone.
6. Safety advice for organizers and members
Organizers: Intervene early. Competitive bidding feels “fair” in the moment, but a member who overbids often becomes a fragile dead slot—and you may have to cover defaults.
Members: High advertised yields usually mean someone else is taking early money at unsustainable cost. Prefer chains with written caps, verified identities, and a shared ledger.
| Do this | Avoid this |
|---|---|
| Cap bids to the 20%/year frame | “Highest bid always wins,” no ceiling |
| Show annualized estimates | Only shout absolute bid VND |
| Keep signed / electronic receipts | Deletable chat as the only proof |
| Screen members’ capacity | Fill the room with strangers for more commission |
7. How Huio helps you stay in the safe zone
Accurate period math is hard by hand—especially with mixed live / dead slots and multi-slot members. Huio helps organizers:
- Record winning bids and auto-calculate each member’s due amount
- Track live / dead status across periods
- Keep contribution / payout history and digital notices
- Reduce phantom-slot risk with identity verification flows (including VNeID / CCCD where supported)
Learn more: Help — Calculations & rules · Download Huio
8. Conclusion
Under Decree 19/2019, interest-bearing hụi interest must stay within 20%/year. Breach the frame and you risk void excess interest, 2–5 million VND admin fines under Decree 144/2021, and—if rates exceed 100%/year with illicit gain ≥ 30 million VND—Article 201 usury exposure.
Set a bid ceiling on day one, document every period, and treat “super high interest” marketing as a warning label—not a growth tactic.