The post-clearance audit conclusion re-assesses value and HS codes for hundreds of declarations across three years, and the final arrears figure makes the finance director sit down: how is it computed, is late payment charged on it, how does the multi-year total inflate, and can the arrears decision be complained against. This article dissects the import tax arrears computation after post-clearance audit into layers so the enterprise can recheck each figure before accepting or complaining.
Applicable legal basis
Import tax arrears are computed as the total tax difference of each declaration in audit scope: for each re-assessed declaration, customs redetermines the correct dutiable value or HS code, applies the correct rate to produce the correct tax payable, and subtracts the tax the enterprise paid under the original declaration; the positive differences of all declarations sum into total arrears. Typical re-assessment causes are unaccepted transaction values, HS codes mismatching goods nature, and denied origin preferences replacing preferential rates with ordinary rates.
On this arrears amount runs late payment money at 0.03% per day on each declaration’s tax difference, from that declaration’s payment deadline to the day the enterprise actually pays, under the tax administration mechanism. Depending on the declaration conduct’s nature, the case may also carry administrative sanctions for wrongful declaration under Decree 169/2026/ND-CP — the current decree on administrative sanctions in the customs field, replacing Decree 128/2020/ND-CP from 1 July 2026. Under Article 10 of that decree, misdeclaration causing a tax shortfall is fined 20% of the tax difference where customs detects it through post-clearance audit, or 10% where the enterprise self-detects and makes a late supplementary declaration; these fines apply only where the tax difference reaches from VND 500,000 per declaration for individuals, or from VND 2,000,000 per declaration for organizations (clause 6 of Article 10). An enterprise that voluntarily makes a supplementary declaration within the window at point a, clause 2, Article 7 — before customs notifies direct examination of the file, or within 60 days from clearance and before an inspection or examination decision — is not sanctioned; violations completed before 1 July 2026 remain governed by Decree 128/2020/ND-CP under the more favourable principle in Article 39. The final total obligation therefore comprises up to three layers: tax arrears, late payment accumulated by each declaration’s age, and fines if any, and the enterprise may demand the detailed computation schedule per declaration for reconciliation.
Analysis for the company’s situation
Why multi-year arrears inflate beyond initial estimates
Two inflation engines work simultaneously: first, declarations in audit scope reach hundreds or thousands over many years, so a small per-declaration difference, for instance one rate point from a wrong code, multiplies into a very large total; second, late payment runs by declaration age, so first-year declarations in the audit period carry nearly the full maximum late years the five-year window allows. The enterprise estimating arrears risk must therefore model by shipment lot and by year, not by feel for one typical declaration. This is also why a small systemic declaration error, running three years undetected, always costs many times more than fixing it from the very first shipment.
Complaining against the arrears decision: separating right parts, striking wrong ones
An enterprise disagreeing with the tax assessment and arrears decision may complain under the Law on Complaints and the customs field resolution sequence, within the statutory complaint time limit from receiving the decision. Effective complaining separates the decision into declaration groups and assessment bases: groups assessed for insufficient price files get supplemented price files and a value reconsideration request; groups with classification interpretation disputes get technical file and classification basis arguments; groups with schedule arithmetic errors get pointed out directly. During complaint, the non-suspension principle applies as with tax decisions generally, so the enterprise must govern payment duty and complaint file in parallel as analysed in the tax inspection area.
Procedure and document checklist
- Demand and receive the detailed arrears schedule per declaration: assessment basis, correct tax, paid tax, difference, late payment.
- Reconcile the schedule against original files per declaration group, separating arithmetic errors, arguable groups and acceptable groups.
- Check each declaration’s late payment start point against its original deadline; report errors in writing with evidence.
- Plan payment within the decision deadline for undisputed parts and parts payable under the non-suspension principle.
- Complain against disagreed parts within the statutory limit, organised by assessment basis group with supplemented files.
Risks and practical notes
The largest risk is accepting a total figure without reconciling the per-declaration schedule: among hundreds of computation lines, arithmetic errors and double-counted declarations genuinely occur, and the enterprise detects them only by self-reconciling. A second risk is pouring all force into the complaint while forgetting the parallel payment duty, letting late payment keep running and enforcement arrive while the complaint is not yet received.
Frequently asked questions
How is import tax arrears after post-clearance audit computed?
As the total difference of each re-assessed declaration in audit scope: customs redetermines the correct value or HS code, computes the correct tax payable and subtracts what was paid under the original declaration. On total arrears add late payment per declaration and wrongful declaration fines under Decree 169/2026/ND-CP where the conduct is sanctionable.
Is late payment charged on the arrears amount?
There is a late payment layer: computed at 0.03% per day on each declaration’s tax difference, running from the original declaration’s payment deadline to actual payment day. This is late payment money under tax administration, separate from administrative fines on wrongful declaration conduct under Decree 169/2026/ND-CP that may be added by case nature.
If arrears span many years, roughly how large is the total amount?
There is no template figure: the total equals the sum of differences of all assessed declarations across in-scope years, plus late payment accumulated by each declaration’s age. A small per-declaration difference multiplied by hundreds or thousands of declarations over years, plus the oldest years’ late payment, creates a total far beyond a typical-declaration estimate.
Can the import tax arrears decision be complained against?
Yes, under the Law on Complaints and the customs field sequence, within the statutory time limit from receiving the assessment and arrears decision. Effective complaint separates by declaration group and assessment basis, supplementing price files or classification arguments accordingly; meanwhile the enterprise still governs payment duty as complaints do not automatically suspend execution.
This article has been quality-reviewed by the FLAW AI Legal Council