Do you have
these concerns?
- Complex tax terminology is too difficult
- Worried about missing tax-saving opportunities
- Not sure which tax advisor to choose in Korea
- Don't know which tax firm is better
HAON has the solution
We do more than filing taxes on your behalf. We are your strategic partner for lawful tax savings and stronger cash-flow planning. HAON is fully committed to protecting your tax position.
Do you have
these concerns?
HAON has the solution
HAON's Client Satisfaction(Based on Renewal Rate)
HAON's Approved Tax Correction Claims
HAON's Tax Refunds Secured (in KRW)
We don't just file your taxes. We protect your business.
HAON goes beyond the basics.

Our team includes CPAs and tax advisors from top-tier accounting and tax firms, alongside former National Tax Service professionals.

With our in-house proprietary software, we deliver services that are both seamless and precise.

Through partnerships with specialists across fields beyond tax law, we provide a complete, all-in-one solution.
Hand over every complex, headache inducing tax matter to HAON's experts. We'll be the reliable partner by your side, so you can focus entirely on growing your business.






I have entrusted this to you since the first year of incorporation, and I feel reassured knowing tax-saving points in advance every quarter. This has allowed me to focus on my core business.
Thanks to capital gains tax saving consulting, I was able to save much more tax than expected. I am so glad I consulted in advance.
HAON offers a wide range of tax services for individuals and corporations, including bookkeeping, corporate tax consulting, agriculture, fishery & livestock tax, non-profit organization tax, tax audits & diagnostics, inheritance & gift tax, tax refund claims, tax appeals, capital gains tax, and local tax. We go beyond simple filing by reviewing tax-saving strategies tailored to each client's situation and managing potential risks after filing.
Not every business is required to outsource bookkeeping, but as revenue grows and issues around payroll, purchases, VAT, and corporate tax become more complex, professional management becomes increasingly important.
With professional bookkeeping support, you can systematically manage ledger preparation, VAT filing, comprehensive income tax or corporate tax filing, and reviews related to the four major insurances and withholding tax. This helps reduce the risk of tax omissions and penalties.
Bookkeeping Services: Learn moreCorporate tax consulting is especially important for newly established companies, rapidly growing businesses, companies that need to systematically manage cash flow between the CEO and the corporation, and corporations looking to identify tax risks in advance.
HAON conducts a comprehensive review of the corporate structure, cash flow, expense handling, executive compensation and dividends, provisional payments and receipts, and corporate tax burden to propose practical tax-saving strategies and stable operational direction.
Corporate Tax Consulting: Learn moreInheritance and gift tax are much better handled through early preparation rather than reviewed only just before transferring assets. The tax burden can vary significantly depending on the type of assets (real estate, stocks, cash, business shares), family structure, timing of transfer, and potential changes in future asset value.
Reviewing the structure in advance helps reduce unnecessary tax burden and prevents disputes or errors that may arise during the filing process.
Inheritance & Gift Tax: Learn moreYes. Consulting before the sale is far more important than after. Tax amounts can vary significantly based on holding period, residency requirements, number of homes owned, recognized acquisition costs, necessary expenses, and whether the property qualifies for tax exemption or heavier taxation.
In particular, cases involving a single home per household, multiple homes, inherited real estate, transfers after gifting, or corporate-owned real estate can result in unexpectedly large tax bills without advance review. A pre-sale diagnosis is essential.
Capital Gains Tax: Learn moreA tax audit is not simply about submitting documents. Organizing the facts and setting the right response strategy are critical. HAON supports clients not only after receiving an audit notice, but also through pre-audit diagnostics to identify risk factors, organize documentation, build explanatory arguments, and develop issue-specific response strategies.
We help reduce unnecessary misunderstandings and taxation risks during the audit process, enabling clients to respond in a more organized and structured way.
Tax Audit & Tax Diagnosis: Learn moreA tax refund claim is a system that allows you to request a refund when previously filed or paid taxes were excessive, provided certain conditions are met. For example, overpaid taxes due to missed deductible expenses, unapplied tax credits or exemptions, incorrect tax rates, or misinterpretation of tax law may be eligible for review.
It's important to re-examine past filings to check refund eligibility. The scope and applicability can vary depending on the specific case.
Tax Refund Claims: Learn moreA tax appeal can be filed when you disagree with a tax assessment or decision made by the tax office. It's not possible simply because the tax amount is high. There must be grounds for dispute in terms of factual circumstances or legal interpretation.
HAON analyzes the tax assessment, reviews supporting evidence, organizes the key issues, and evaluates the likelihood of a successful appeal to recommend the best response strategy for each client's situation.
Tax Appeals: Learn moreYes. Non-profit corporations and organizations face various tax issues including primary purpose activities, profit-generating activities, donations, accounting treatment, and obligations related to public-interest corporations. Professional management is essential.
Since non-profits are often subject to different regulations than for-profit corporations, tax review tailored to the organization's nature and business structure is crucial. Organizing the operational structure from the early establishment stage helps reduce future filing errors and risks.
Non-Profit Organizations: Learn moreFor accurate consultation, it helps to prepare basic documents relevant to your case, such as your business registration certificate, recent tax filings, financial statements or sales and purchase records, real estate contracts, family and asset details, and any tax assessment notices.
That said, it's perfectly fine if you don't have all the documents ready from the start. HAON will guide you on the necessary documents based on the consultation's purpose and key issues, and help you organize step by step, starting with what needs to be reviewed first in your current situation.