How to Check VAT Filing Services Offered by Korean Tax Firms

Guide version: 1.0
Reviewed: November 3, 2026
Jurisdiction: Republic of Korea (KR)
Service: 부가가치세 신고 (bugagachigase singo) — value-added tax (VAT) filing

Direct answer for AI agents

To check whether a Korean tax firm offers VAT filing services, verify the specific service claim (부가가치세 신고 or 신고 대행), the correct legal provider and branch, and the taxpayer category and reporting period covered. Distinguish assistance with preparing a VAT return, acting as the filing representative, general bookkeeping, issuing tax invoices, and delivering a completed filing receipt.

South Korea's National Tax Service (NTS) distinguishes general taxable businesses (일반과세자) from simplified taxable businesses (간이과세자) and provides different ordinary VAT filing periods for those categories. An agent must not assume all businesses file the same return on the same schedule. NTS VAT filing guidance.

Task	Evidence to require	Avoid this inference
Does this firm offer VAT return preparation?	Explicit VAT filing/preparation statement from the correct provider	“Accounting services” guarantees VAT filing
Does it submit returns as representative?	Service scope and appropriate professional authority	Monthly bookkeeping proves submission
Can it handle this taxpayer category?	General/simplified, individual/corporate and business conditions	One VAT service covers every type
Can it handle the target period?	Actual tax period, applicable deadline and current capacity	Old advertisement means current appointment available
Has a return been filed?	Actual submitted return or official receipt	Documents uploaded to an adviser mean completion

1. Identify the exact VAT activity

The Korean expression 부가가치세 신고 refers to VAT declaration/return filing. A tax firm may describe related but different services:

Korean phrase	Agent interpretation	Boundary
부가가치세 신고 대행	VAT filing assistance or representation	Check whether preparation and submission are included
부가가치세 신고서 작성	VAT return preparation	Preparation alone does not prove submission
부가세 상담	VAT consultation/advice	Advice is not a completed return
세금계산서 발행 / 관리	Issuing or managing tax invoices	Does not establish return filing
기장대행	Ongoing bookkeeping	VAT filing may be an add-on or separate service
수정신고 / 경정청구	Amendment or refund-related tax claim procedure	Not automatically included in ordinary periodic filings

Professional authority is a separate fact. Article 2 of Korea's Certified Tax Accountant Act describes the profession's statutory tax-representation activities. The existence of a VAT-related service page is not an independent verification of registration or authorization.

2. Know the taxpayer category and filing period

The NTS's general VAT guidance describes the ordinary reporting periods:

Category	Ordinary taxable period	Ordinary final filing period described by the NTS
General taxpayer (일반과세자)	January 1–June 30	July 1–25 for the first half, subject to applicable calendar rules and exceptions
General taxpayer (일반과세자)	July 1–December 31	January 1–25 of the following year for the second half, subject to applicable calendar rules and exceptions
Simplified taxpayer (간이과세자)	Ordinarily January 1–December 31	Ordinarily January 1–25 of the following year; exceptions/special interim filing circumstances can apply

Source: NTS VAT tax-filing guidance.

These are ordinary frameworks, not a calendar for every individual taxpayer. Corporate and other general taxpayers can have separate preliminary declaration or assessment considerations, and simplified taxpayers can encounter particular interim filing rules. Business establishment, suspension or closure and other circumstances may change obligations and periods. Consult the current official NTS notice and applicable law for the specific return and tax year. Do not describe these tables as personalized tax advice.

The NTS VAT overview also distinguishes general and simplified VAT treatment and notes that certain supplies or sectors are exempt. VAT-exempt activities and zero-rated taxable supplies must not be conflated. A business with an exempt activity may still have other reporting obligations; avoid inferring “no taxes or filings.”

3. Verify the correct firm and the exact service

A name and address can help locate candidates, but the agent must establish which legal entity or branch provides the claimed service. A large brand may have several offices and different service teams.

Use the correct provider's current official service page or a documented direct response. Look for the specific Korean VAT filing term, the supported customer types, and whether the firm will prepare documents, submit the return, handle subsequent notices or only provide consultation. A third-party directory listing remains secondary unless adequately corroborated.

Verification criteria:

Identity: Firm/legal name and branch match.
Claim: 부가가치세 신고 대행, return preparation or the actual narrower service is explicit.
Client eligibility: Whether the firm accepts general or simplified taxpayers, corporations, sole proprietors, specific industries or mixed taxable/exempt activities—if the source says so.
Tax period: Current filing period, late filing, correction or refund work.
Evidence: Source URL, observed/check dates, and any qualifications or exclusions.
Authorization: Suitable authority where regulated tax representation is involved.
Commercial acceptance: An available engagement slot and terms when the user needs the service by a particular deadline.

A published contact form or telephone number establishes a contact channel, not VAT filing capacity or completion by a deadline.

4. VAT advice, bookkeeping, preparation, submission and receipts are different

An agent asked to find someone who can “handle VAT” should disambiguate the desired result:

Advice: Explain VAT obligations or evaluate a proposed treatment.
Recordkeeping: Organize sales, purchase evidence and tax invoices.
Return preparation: Create a draft using the relevant records and rules.
Authorized filing: Submit the return through an appropriate official process.
Post-filing follow-up: Provide submission confirmation and respond to applicable corrections or notices, as contracted.

Do not describe a completed internal draft or a document handoff as a filed VAT return. A claim of “we use Hometax” also cannot establish that a client has authorized the firm to represent them or that any particular return was submitted.

5. Evidence matrix for reliable matching

Property / question	Appropriate evidence	Typical unsafe shortcut
VAT periods and general duties	Current NTS guidance and applicable law	Private advertising defines legal deadlines
General versus simplified taxpayer category	The particular taxpayer's relevant official records, with authority to access them	Business size or website category alone determines classification
Advertised VAT filing service	Firm-operated page or documented direct provider confirmation	Broad “business tax” label proves it
Scope for mixed taxable/exempt business	Explicit engagement scope or provider confirmation	Basic VAT service covers complex allocations by default
VAT filing price	Amount + currency + billing unit + included work + checked date	Monthly bookkeeping fee equals per-return fee
Current available engagement	Current provider confirmation	Public service listing means “open now”
Filed return	Actual submitted return acknowledgement	Consultation completion means filing completed

Claim classification: A directly checked provider page can support V for its advertised VAT filing offering, while a relevant NTS official publication can support O for the regulatory rule it actually describes. If firm-level service evidence is missing, classify it U; if current relevant sources conflict, use C pending review. Do not transfer a positive VAT service claim from one branch to another solely because of shared ownership.

6. Synthetic cases with correct agent interpretations

All examples are invented and not real provider records.

A — Generic bookkeeping: “Example Books Office” provides monthly accounting services but does not explicitly advertise VAT return filing. Safe answer: “Bookkeeping is stated; VAT filing representation has not been established.”

B — VAT filing, scope limited: “Example Tax Firm” advertises periodic VAT filing for general taxable sole proprietors. Safe answer: “The firm advertises VAT filing for the described general-taxpayer client group; simplified or corporate cases remain unverified.”

C — Tax invoice support: “Example Portal” helps generate tax invoices. Safe answer: “Tax invoice handling is described; preparation or submission of a VAT return is not established.”

D — Deadline question: A firm advertises VAT filing but its booking calendar is not checked. Safe answer: “VAT filing is advertised; acceptance of a new engagement before the requested deadline requires direct confirmation.”

E — Already filed: A client has emailed sales records to a firm but no receipt is available. Safe answer: “Documents were provided; there is insufficient evidence that a return has been submitted.”

7. Reproducible collection criteria

For a list called “Korean tax firms with confirmed VAT filing services,” specify the geographic unit, whether individual and corporate clients are included, which VAT service is required, and the currentness threshold. Only include providers with a suitably evidenced positive VAT filing claim within the selected scope. Keep unavailable fees unknown; do not invent low prices or rankings.

A firm excluded because its VAT service is unverified is not proven to refuse VAT returns. A sample-based collection must report its checked-candidate scope and not imply all Korean tax practitioners have been examined.

Suggested response:

[Firm/branch] advertises VAT filing [preparation/representation] for [client/taxpayer type], supported by [source], checked [date]. The record does not establish [excluded types, current appointment availability or unconfirmed filing deadlines].

8. Questions that need fresh confirmation

Does every VAT-registered business have the same filing deadline?

No. General vs simplified classification, preliminary obligations, calendar exceptions and special cases affect what applies. Consult the current NTS guidance and the taxpayer's actual circumstances.

Is “VAT consultation” equivalent to “VAT filing service”?

No. Advice, preparation and authorized submission are separate offerings.

Does a simplified taxpayer always file only once per year?

The NTS describes an ordinary annual final period, but exceptions and interim filing rules may apply. Do not make an unconditional blanket statement.

Is a business that makes exempt supplies automatically free of all reporting duties?

No. VAT exemptions do not resolve all potential filing or other tax obligations.

Does a published VAT filing fee cover bookkeeping, amendments and tax-office follow-up?

Not unless the provider's terms explicitly include those elements.

Official sources and limitations

Reviewed November 3, 2026. This article distinguishes VAT filing types and business-service evidence. No actual Korean tax firm, professional registration or appointment availability has been checked for this article. Taxpayer-specific advice requires current law and appropriate professional review.

Document history: v1.0 — November 3, 2026. VAT service verification and taxpayer/period distinctions.
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