Vietnam Corporate Income Tax: Rates, Filing Process and Planning Questions

Hero visual — An original editorial illustration of the financial-record and review environment behind corporate income tax governance.

Original visual created by VietPard editorial team for this article; conceptual illustration, no government insignia or taxpayer data.

Corporate income tax in Vietnam is not only a rate question. A finance team needs a defensible path from commercial transactions and local accounting records to a taxable-profit calculation, provisional payments and annual finalisation. The current framework changed materially from 2025 to 2026, so legacy filing calendars and “standard SME rate” summaries should be treated with caution. This guide is written for operators of Vietnamese entities, including foreign-invested companies.

Direct answer: Vietnam corporate income tax (CIT) is generally charged at 20%, but Law No. 67/2025/QH15 provides 15% and 17% rates for qualifying businesses using prior-period total revenue tests. Companies should maintain tax-ready records, make quarterly provisional CIT payments and complete annual finalisation under the post-1 July 2026 tax-administration framework. The applicable rate, deductions, incentives and filing position depend on the facts.

1. What Vietnam corporate income tax means for an operating company

CIT is the tax charged on taxable income of an enterprise. In practical terms, management starts with the company’s accounting result, then tests revenue, expenses, other taxable items and relevant adjustments under the CIT rules. The result is not necessarily the same as accounting profit shown to management or a group parent. A well-run process keeps both views visible and documents why they differ. 1 3 10

For a Vietnamese incorporated company, the first governance question is usually not “What percentage do we pay?” but “Which activity, entity and tax period are being measured?” A locally incorporated operating company, an overseas group company charging services, and a foreign contractor earning Vietnam-sourced income are different fact patterns. Contracts, performance location, payment flows and the entity’s legal presence can change the analysis. This article addresses the local-company CIT control cycle; cross-border and foreign-contractor positions need transaction-specific review. 3 4 10

The current CIT Law is Law No. 67/2025/QH15, effective from 1 October 2025. It is implemented by Decree No. 320/2025/NĐ-CP, effective 15 December 2025, and Circular No. 20/2026/TT-BTC, effective 12 March 2026 and applying from the 2025 tax year. The administration layer then changed under Law No. 108/2025/QH15 and Decree No. 252/2026/NĐ-CP from 1 July 2026. That sequence is why an undated online guide may be directionally familiar but operationally unsafe. 1 3 4 5 6

Two definitions help. Taxable profit is the tax-law measure on which CIT is calculated after relevant adjustments; annual finalisation is the period-end filing and reconciliation process. Provisional CIT is the company’s payment assessment during the year. Keeping these labels separate prevents a common control failure: treating a cash payment as if it completed the tax analysis. 6 10

2. Which current CIT rate is the right starting point?

The general CIT rate is 20%. Article 10 of Law 67 also introduced reduced 15% and 17% rates for businesses that meet the revenue-linked rules, while specified natural-resource activities have their own rates. The rate table below is a triage tool. It tells a finance leader which rule to investigate first; it does not certify the company’s entitlement or replace the detailed conditions in the law and implementing instruments. 1 2

Decision aid 1 — Statutory CIT rate starting points. Source: Law No. 67/2025/QH15, Article 10; official Chinhphu.vn explanation.

Figure 1 — Rate decision chart: use the immediately preceding CIT period’s total revenue in the statutory 15% and 17% tests.

Original visual created from cited data in Law No. 67/2025/QH15 and the official Chinhphu.vn rate explanation.

The key phrase is total revenue of the immediately preceding CIT period. It is not a profit threshold, a group budget, or an informal “small business” label. Before relying on 15% or 17%, establish the company’s preceding-period revenue measure, assess whether the statutory exclusions or relationship rules matter, and retain the calculation. A start-up, a newly restructured business, or a company with connected entities should not make the determination from a sales dashboard alone. 1 2 3

Preferential CIT rates and holidays are a different conversation. The law provides incentives for qualifying cases, but an incentive depends on the relevant activity, location, investment project and conditions. It should be evaluated as a documented legal position, not assumed because a business is foreign-invested, export-oriented, innovative or located in an industrial area. Treat the rate table and incentive analysis as two separate workstreams. 1 3 10

3. How accounting profit becomes taxable profit

Taxable profit is an evidence-led calculation. A useful management bridge is: commercial activity creates revenue and costs; local accounting captures them in the books; tax review identifies adjustments or exceptions; the finalisation file explains the movement from accounting result to CIT result. The bridge is conceptual, but it is valuable because it assigns every material amount an owner, a document trail and a reconciliation point. 3 4 9 10

Figure 2 — Conceptual bridge from local accounting records to an explainable CIT finalisation file.

Original visual created from cited data and framework in Law 67, Decree 320, Circular 20 and the Ministry of Finance explanation of Circular 99.

The calculation often begins with recorded revenue and expenses, then considers other taxable income, tax-law adjustments and any applicable loss or incentive position. The exact treatment of a transaction may depend on timing, legal form, accounting evidence and a dedicated rule. The financial statements and annual CIT return therefore need to be read together. A variance is not automatically an error, but an unexplained variance is a control weakness. 1 3 10

For expenditure, an operational rule is more durable than a long list of “deductible” items: build the supporting file at the time the company commits and pays, not when it is asked to finalise. For material costs, that file may include a valid business purpose, contract or order, proof that goods or services were received, approved invoice or voucher, payment evidence, relevant tax treatment, and ledger mapping. Circular 20 adds documentary guidance for certain costs incurred for production or business activities that may not yet be associated with revenue in the same period; it does not make generic cost labels self-proving. 3 4 11

This discipline matters especially where an overseas group, related party, foreign supplier or new investment project is involved. A management fee, technology charge, shared service, capital transaction or cross-border service cannot be validated simply by a ledger description. The team should identify the contract counterparty, service or deliverable, tax treatment, invoice and payment path, and whether transfer-pricing, foreign-contractor tax, withholding, permanent-establishment or investment-incentive questions need separate review. This is a risk triage, not a conclusion about any individual transaction. 3 4 10

Books should also reflect the current enterprise accounting regime. The Ministry of Finance states that Circular No. 99/2025/TT-BTC applies to financial years beginning on or after 1 January 2026 for enterprises in scope, replacing the former Circular 200 regime. Group reporting packs can be useful, but they do not remove the need to maintain the local records and reconciliations on which tax positions rely. 9

Related implementation path: Vietnam bookkeeping requirements, Article 37

4. How provisional payments and annual finalisation work

The current administration framework draws a deliberate line between paying CIT provisionally during the year and finalising it after the period ends. Under Decree No. 252/2026/NĐ-CP, CIT is provisionally paid quarterly. The due date is the last day of the first month following the quarter. That is a payment rhythm, not an instruction to file a conventional quarterly CIT return. The finance calendar should therefore show cash forecasting, review and payment evidence alongside other filings rather than treating “CIT filing” as a single recurring task. 5 6

At year-end, the company completes its annual CIT finalisation. Decree 252 states that the finalisation filing deadline is the last day of the third month after the end of the finalisation period. A company whose accounting period is not the calendar year must measure the deadline from its own period-end. The annual close should include a documented reconciliation, review of provisional payments, and sign-off on the final return and payment position. 6

There is also an annual cash-control safeguard. The total CIT provisionally paid for four quarters must not be less than 80% of the annual finalised CIT. Decree 252 provides for late-payment interest on the relevant shortfall. This means a company can be current on four payment dates yet still have a year-end exposure if its estimates did not keep pace with actual profitability. The practical response is periodic reforecasting, not artificially accelerating or delaying revenue and expenses. 6

Figure 3 — CIT control cycle: maintain records, assess quarterly provisional payments, then complete annual finalisation.

Original visual created from cited data in Decree No. 252/2026/NĐ-CP and the Ministry of Finance accounting framework.

A 2026 extension programme illustrates why return and payment dates must be separated. Decree No. 245/2026/NĐ-CP provided conditional, time-limited extensions for specified eligible taxpayers and stated periods, including certain provisional CIT payments. It did not create an evergreen alternative timetable or remove the need to meet filing obligations. A business considering an extension should validate sector, taxpayer, period and request requirements against the decree before changing its cash plan. 7

Keep the CIT calendar distinct from the calendar for VAT, payroll taxes, e-invoices and financial statements. These processes share records, but they do not share all deadlines, calculations or legal triggers. A controller who builds a single close checklist with clear owners for books, invoice data, payments, tax review and annual statements will see discrepancies earlier and avoid using an outdated headline date from another tax. 5 6 9

Related implementation path: Vietnam tax compliance calendar, Article 38

5. Planning questions to ask before the year-end close

Tax planning in this context means testing the facts and evidence early enough to make a lawful, informed filing decision. It does not mean selecting a preferred rate after the result is known. The highest-value questions are usually simple, but they need answers supported by records rather than recollection. A short pre-close review makes the annual finalisation more predictable and creates a useful audit trail for management. 1 3 4

Decision aid 2 — Pre-close CIT planning checklist. VietPard editorial analysis based on the cited statutes and implementing guidance.

Start with the rate test. Reconcile preceding-period total revenue to the prior CIT working papers, not merely a commercial sales report. Then decide whether any statutory exclusions, connected-enterprise issues or incentives require analysis. The objective is a concise rate memorandum: the rule considered, the figures used, the conclusion, the owner and the evidence location. This reduces the risk that a rate decision is lost when staff or advisers change. 1 2 3

Next, make the year-end close evidence-led. For significant expenses, check whether the legal entity, counterparty name, transaction description, date, approval and payment route tell the same story across the contract, invoice, bank record and ledger. Resolve mismatches while the business owner can explain them. This is also the moment to identify incomplete services, advances, accruals, intercompany recharges and exceptional payments that deserve a specific CIT review. 3 4 11

Finally, connect the tax calculation to cash. A quarterly forecast should track actual taxable-profit drivers against the provisional amounts already paid, then explain material variance to the finance leader. At finalisation, preserve the bridge from statutory books to the return and retain the source papers according to the applicable record-retention rules and any longer need created by audit, dispute or another legal requirement. Do not treat retention as an archive-only task; it is a design requirement for the close process. 6 8 9

Related implementation path: Vietnam VAT guide for foreign-invested companies, Article 34

6. What this means for a regional finance leader

For a regional finance leader, the useful outcome is an operating rhythm, not a one-off tax calculation. Assign a Vietnam-based accounting owner for source records and local close, a finance reviewer for forecasts and material adjustments, and an escalation route for cross-border, incentive or connected-party matters. Give the owner authority to stop an unsupported posting from becoming a year-end problem. The group controller can then review a short, consistent package rather than reconstructing the position after the deadline. 3 4 6 9

A practical monthly pack can contain: a trial balance and bank reconciliation; a revenue and cost exception list; evidence status for material items; a schedule of group or foreign-supplier transactions; a provisional CIT forecast; and unresolved decisions with owners and dates. The pack is not a substitute for professional advice, but it creates the information needed for a timely decision. It also makes it easier to explain why the tax result differs from group management reporting. 3 4 9 10

For a founder, the same principle is simpler: do not wait for profitability to become visible before building local record controls. Early-stage entities often have set-up costs, market-development activity and overseas support. Those facts may be commercially normal, but their CIT treatment depends on the current rules and evidence. Ask the finance team to identify material uncertainty when it occurs, record the reasoned treatment and revisit it before the first annual finalisation. 3 4 11

If you need to map your Vietnam entity’s records, provisional payments and year-end close to the current rules, discuss bookkeeping and tax support with VietPard.

One additional control is to distinguish a question that can be resolved from routine evidence from one that needs a technical opinion. Routine questions include whether the ledger matches the bank and whether a contract is filed. Technical questions may include the correct revenue timing for a complex supply, the treatment of a foreign counterparty, a related-party recharge or an investment incentive. Record the decision owner, the source consulted and the point at which the matter was resolved. This avoids turning the annual finalisation into an unstructured review of every transaction. 3 4 6

7. Common mistakes to avoid

Most CIT problems begin with a category error, an evidence gap or a late escalation. The following mistakes are avoidable when the business treats CIT as a year-round control process rather than a form completed after the accounts are closed. 1 3 4 6

Treating 15% or 17% as an automatic SME rate. The statutory test refers to total revenue of the immediately preceding CIT period, and the law contains exceptions. Document the revenue calculation and confirm whether other eligibility constraints matter before applying a reduced rate.

Calling a quarterly provisional payment a “quarterly CIT return”. The current administration rule is a quarterly provisional payment cycle. Annual finalisation remains the period-end reconciliation and filing process. Design the calendar around both tasks.

Using accounting entries as the entire deduction file. A ledger code does not explain purpose, delivery, approval or payment. Preserve the commercial evidence while it is available, especially for material, cross-border or unusual expenditure.

Ignoring a growing 80% annual safeguard gap. A business can make four provisional payments and still need to revisit its forecast. Reforecast taxable-profit drivers and compare the four-quarter total with the expected annual CIT result before finalisation.

Assuming a temporary extension changes the default calendar. The 2026 extension described by Decree 245 was conditional, period-specific and time-limited. Validate the conditions and separate payment relief from filing duties before changing internal dates.

8. Frequently asked questions

What is the corporate income tax rate in Vietnam?

The general CIT rate is 20% under Law No. 67/2025/QH15. The same law provides a 15% rate for an enterprise with total revenue not more than VND 3 billion and a 17% rate for total revenue above VND 3 billion and not more than VND 50 billion. For those two tests, revenue is measured by the immediately preceding CIT period. Special-sector rates and incentives are separate matters, so a company should confirm its specific position before filing. 1 2

Is corporate income tax paid monthly or quarterly in Vietnam?

Under Decree No. 252/2026/NĐ-CP, CIT is provisionally paid quarterly, with payment due by the last day of the first month after the quarter. The annual CIT finalisation is a separate period-end filing process. Calling this a monthly CIT system, or treating the quarterly payment as a completed annual return, would be inaccurate. Other taxes can have different cycles, so use a tax-specific calendar. 5 6

When is annual CIT finalisation due?

The current deadline is the last day of the third month after the end of the finalisation period under Decree No. 252/2026/NĐ-CP. For a calendar-year enterprise, the period end is 31 December, but an enterprise with a permitted different accounting year should calculate from its own period end. Check for a current, valid extension separately; an extension may affect payment rather than every filing duty. 6 7

Can a foreign-owned company receive a lower CIT rate?

Foreign ownership alone is not the statutory trigger for the 15% or 17% revenue-linked rates. A qualifying rate or investment incentive depends on the relevant legal test, which can include prior-period revenue, activity, location, project facts and other conditions. A foreign-invested company should first identify the correct legal entity and transaction, then retain evidence supporting any claimed rate or incentive. 1 2 3

What expenses can reduce taxable profit in Vietnam?

There is no safe universal list. The business should test whether an expense is connected to production or business activities and whether the required documentation and payment evidence are available under the current CIT instruments. Circular No. 20/2026/TT-BTC gives further guidance for particular documentary situations. Significant, unusual, related-party or cross-border costs should be reviewed against the applicable clause rather than assumed deductible from their label. 3 4 11

Do provisional CIT payments need to match the final annual tax exactly?

No. They are provisional assessments during the year, but the current framework includes a safeguard: the total provisionally paid for four quarters must not be below 80% of annual finalised CIT, with late-payment interest applying to the relevant shortfall under the decree. Periodic forecasting and documented variance review are therefore practical controls, not merely treasury administration. 6

Conclusion: use a control model, not a headline rate

Vietnam corporate income tax is manageable when the business separates four decisions: the statutory rate starting point, the evidence supporting taxable-profit adjustments, the quarterly provisional-payment forecast and the annual finalisation reconciliation. The general 20% rate remains important, but the new 15% and 17% rules, current administration framework and fact-sensitive deductions make disciplined records essential. Confirm the latest law and facts before filing; this article is general information, not personalised tax, accounting, audit or legal advice. 1 3 4 6

Sources and Further Reading

Sources are linked at the claim level above. Vietnamese statutes and signed attachments are controlling for decisive legal wording; this English-language guide should be refreshed and checked against the current text before publication.

[1] National Assembly of Vietnam, Government Legal Document Database. Law No. 67/2025/QH15 on Corporate Income Tax. Issued 14 June 2025; effective 1 October 2025. Accessed 10 September 2026.

[2] Government Electronic Newspaper, Chinhphu.vn. New corporate income tax rates applicable from 1 October 2025. 30 September 2025. Accessed 10 September 2026.

[3] Government of Vietnam, Government Legal Document Database. Decree No. 320/2025/NĐ-CP detailing and guiding the Corporate Income Tax Law. Issued and effective 15 December 2025. Accessed 10 September 2026.

[4] Ministry of Finance, Government Legal Document Database. Circular No. 20/2026/TT-BTC detailing the Corporate Income Tax Law and Decree 320. Issued and effective 12 March 2026. Accessed 10 September 2026.

[5] National Assembly of Vietnam, Government Legal Document Database. Law No. 108/2025/QH15 on Tax Administration. Issued 10 December 2025; effective 1 July 2026. Accessed 10 September 2026.

[6] Government of Vietnam, Government Legal Document Database. Decree No. 252/2026/NĐ-CP detailing the Tax Administration Law. Issued 30 June 2026; effective 1 July 2026. Accessed 10 September 2026.

[7] Government Electronic Newspaper, Chinhphu.vn. Extension of deadlines for VAT, CIT, PIT and land-rent payment in 2026. 27 June 2026. Accessed 10 September 2026.

[8] National Assembly of Vietnam, Government Legal Document Database. Law No. 88/2015/QH13 on Accounting. Issued 20 November 2015; effective 1 January 2017. Accessed 10 September 2026.

[9] Ministry of Finance. New regulations on the enterprise accounting regime. 4 November 2025; explains Circular No. 99/2025/TT-BTC. Accessed 10 September 2026.

[10] PwC Vietnam. Vietnam — Corporate: Taxes on corporate income. Last reviewed 9 March 2026. Accessed 10 September 2026.

[11] Baker McKenzie. Vietnam: New Implementing Circular on Corporate Income Tax. 22 April 2026. Accessed 10 September 2026.