Tax Estimates Before Filing
We explain the estimated tax amount before each regular filing.
From new ventures to growing businesses
Accurate accounts.
Thoughtful tax planning.
Our Service Standards
Our Bookkeeping Service Standards
The service standards we provide to our bookkeeping clients.
We follow a consistent process, from checking documents before filing to explaining the results.
Early Checks for Missing Documents
We check in advance that the documents needed for filing are complete.
Tax Deadline Reminders
We notify you of key filing dates in advance.
Clear Explanations of Results
We explain the filing results and how your tax was calculated.
Message from the Principal
Same revenue. Different tax outcomes.
The difference begins with your decisions.
NUMBER ONE TAX & ACCOUNTING
Principal
NUMBER ONE TAX & ACCOUNTINGYoo Tae-yeol · Korean CPA & Tax Accountant
Welcome.
I am Yoo Tae-yeol, principal of NUMBER ONE TAX & ACCOUNTING and a Korean CPA and tax accountant.
Even when two companies earn the same revenue,
their tax burdens can differ considerably.
The difference is not simply a matter of how a return is filed. It also depends on
your business structure and the decisions you make at key moments.
At NUMBER ONE TAX & ACCOUNTING, we do more than calculate tax after the year-end close.
My work draws on studies in business administration at Seoul National University
and over 30 years of experience as a Korean CPA and tax accountant. Together, we review
profit, cash flow and financial structure to understand
what drives your results and which decisions best support your future.
If you are planning to sell, pass on or gift property or other assets,
we go beyond calculating the tax to
compare your options and recommend an approach that fits your circumstances.
Before a problem arises,
we aim to be the first people you turn to when an important decision needs to be made.
That is our commitment at NUMBER ONE TAX & ACCOUNTING.
Accurate work.
Clear explanations.
Advice with your future in mind.
Bookkeeping
Sound bookkeeping builds
a foundation for growth.
From monthly transactions to tax returns and year-end accounts, we organize your tax obligations so you can focus on your business.
Ask About Bookkeeping →
✓Monthly Sales & Purchases
✓Bookkeeping
✓Korean VAT Filing
✓Withholding Tax Filing
✓Payroll Tax Support
✓Comprehensive Income Tax Filing
✓Corporate Income Tax Filing
✓Tax Calendar Management
✓Business Tax Advice
✓Year-end Accounts & Financial Review
Who This Service Is For
New Businesses
Sole Proprietors
Corporations
Growing Businesses
Businesses with Employees
Owners Seeking Clear Communication
Owners Seeking Structured Support
Starting a Business
Business success takes more than strong sales.
It takes sound management.
We explain the essential tax steps in plain language, so you know what to do after registering your business in Korea.
Ask About Starting a Business →Prepare to Launch
Business Registration & Business Activity Review
Set Up Your Operations
Bank Accounts, Cards & Supporting Documents
Plan Your Tax Calendar
Filing Dates & Your First Tax Return
✓Korean Business Registration
✓General vs. Simplified VAT Status
✓Business Bank Account
✓Business Credit Card
✓Cash Receipts
✓Tax Invoices
✓Withholding Tax When Hiring
✓Korea's Four Major Social Insurance Programs
✓Korean VAT
✓Comprehensive Income & Corporate Taxes
✓Initial Tax Setup
With you from the start,
with guidance at every step.
with guidance at every step.
Clear Communication
Is communication with
your tax adviser difficult?
At NUMBER ONE TAX & ACCOUNTING, communication is central to our service.
Ask About Changing Tax Advisers →
Slow responses to your questions
Your contact person keeps changing
Unclear explanations of your tax bill
Contact only just before filing deadlines
Too little advice on your business circumstances
Our approach to client support.
We explain what is needed before filing, help you understand the tax outcome, and notify you of key dates in advance.
- Prompt Review of Enquiries
- Advance Tax Deadline Reminders
- Tax Estimates Before Filing
- Results Explained After Filing
Tax & Accounting Services
Find the tax and accounting support
that fits your needs
Different business stages and tax matters require different support.
Choose the topic closest to your circumstances to see the scope of our services.
01
Ongoing Tax Support
Bookkeeping & Regular Compliance
Structured management of recurring bookkeeping and filing obligations.
02
Asset-related Taxes
Property & Asset Taxes
We review the facts and asset transfer process to guide the required filings.
03
Business Support
Support for Your Business
Tax and accounting reviews at the start of your business and when circumstances change.
01Ongoing Tax SupportTax Bookkeeping+
We organize monthly business records and maintain the accounting and tax information needed for regular filings.
When You May Need This
- Starting a business and needing bookkeeping
- Regular tracking of sales, expenses and tax dates
- Managing employee payroll alongside tax filings
What We Can Help With
- Organize sales, purchases and expense records
- Prepare books and review filing documents
- Explain tax deadlines and required documents
What to Prepare
- Korean Business Registration Certificate
- Recent tax returns and financial records
- Monthly revenue, employee count and record-keeping methods
Consultation→Situation Review→Explain the Scope→Ongoing Support
Enquire About Bookkeeping →
02Ongoing Tax SupportKorean VAT+
We review VAT treatment and filing records based on your business and transactions, and support your Korean VAT return.
Key Points to Review
- Industry and VAT status
- Unreported sales and purchase documentation
- Electronic tax invoices, card and cash receipt records
What We Can Help With
- Review sales and purchase records
- Check documents supporting input VAT credits
- Organize documents and assist with filing
What to Prepare
- Hometax filing records
- Business bank and card statements
- Separately held contracts and supporting records
Required documents may vary by industry and transaction type.
Enquire About VAT →03Ongoing Tax SupportKorean Comprehensive Income Tax+
We review income, including business income, and eligible expenses to support your Korean income tax return.
When You May Need This
- Operating as a sole proprietor
- Receiving several types of income
- Needing a review of previous returns
What We Can Help With
- Check income and expense records
- Explain filing methods and required documents
- Assist with comprehensive income tax filing
What to Prepare
- Income statements and payment records
- Business expense documentation
- Recent returns and other income records
04Ongoing Tax SupportKorean Corporate Income Tax+
We review corporate accounts and major transactions, supporting the year-end close through to Korean corporate income tax filing.
Key Points to Review
- Completeness of year-end records
- Major assets, liabilities and related-party transactions
- Accounting for business owners, directors and employees
What We Can Help With
- Review year-end accounts
- Organize tax adjustment documents
- Assist with corporate income tax filing
What to Prepare
- Financial statements and account ledgers
- Major contracts and transaction records
- Recent corporate income tax returns
05Ongoing Tax SupportPayroll & Withholding Tax+
We help manage payroll records, withholding tax filings and payment statements for employees and individual service providers.
When You May Need This
- Hiring your first employee
- Needing monthly payroll records
- Regular payments to individual service providers
What We Can Help With
- Help prepare payroll records
- Organize withholding tax filing records
- Explain payment statement deadlines
What to Prepare
- Employment contracts and pay terms
- Details of joining and departing employees
- Monthly payment records
06Asset-related TaxesKorean Capital Gains Tax+
We review the facts from acquisition to disposal and your asset holdings to assist with Korean capital gains tax review and filing.
Key Points to Review
- Asset type and acquisition and disposal details
- Holding period and ownership
- Evidence of acquisition costs and eligible expenses
What We Can Help With
- Explain potential issues and required records
- Review acquisition and disposal records
- Assist with capital gains tax filing
What to Prepare
- Purchase and sale contracts and property registry records
- Expense records from acquisition and ownership
- Details of property holdings
Consulting before a transaction is completed helps identify the records and issues to check in advance.
Enquire About Capital Gains Tax →07Asset-related TaxesKorean Inheritance Tax+
We identify heirs and estate assets, then guide preparation of records for valuation, deductions and filing.
Key Points to Review
- Heirs and family relationships
- Property, financial assets and liabilities
- Prior gifts and changes in assets
What We Can Help With
- Organize estate and liability records
- Review valuation and deduction records
- Assist with inheritance tax filing
What to Prepare
- Family relationship documents
- Asset and liability list
- Property and financial transaction records
08Asset-related TaxesKorean Gift Tax+
We review the assets to be gifted, the parties' relationship and transfer method to assist with the necessary review and filing.
Key Points to Review
- Relationship between donor and recipient
- Asset type and valuation records
- Previous gifts and movement of funds
What We Can Help With
- Confirm the facts of the gift
- Review valuation and filing documents
- Assist with gift tax filing
What to Prepare
- Documents relating to the gifted assets
- Family relationship records
- Previous gift and fund transfer records
09Business SupportNew Business Advice+
We explain initial tax setup, record-keeping, payroll and filing dates around the time of Korean business registration.
Topics We Discuss
- Sole proprietorship vs. corporate structure
- Industry and business registration checks
- Initial records, bank account and card management
Preparing to Operate
- Review how sales are recorded and payments are settled
- Check tax dates when hiring employees
- Explain regular filing dates
What to Prepare
- Planned industry and business plan
- Expected revenue and cost structure
- Whether you plan to hire employees
10Business SupportChanging Tax Advisers+
If your current arrangements no longer fit your business, we explain the steps and records needed to change tax advisers.
When to Get in Touch
- Reviewing communication or the scope of support
- Changes in business size or industry
- Seeking clarity on scope and deadlines
What We Can Help With
- Check filings already in progress
- Provide a document transfer checklist
- Agree on a new schedule and communication process
What to Prepare
- Recent returns and financial records
- Current contract and service scope
- Your most important support and advice needs
Near a filing deadline, we review progress before agreeing on the timing of a transfer.
Ask About Changing Tax Advisers →11Business SupportTax Consulting+
For business structures or transactions needing a tax review, we examine the facts and available options with you.
Consulting Topics
- Incorporation and changes between sole proprietorship and corporate structures
- Expansion, business transfers and restructuring
- Tax matters involving business owners and their companies
How We Work
- Confirm your objectives and the facts
- Review contracts, financial and tax records
- Provide advice within the agreed scope
What to Prepare
- Details of the decision you need to make
- Relevant contracts and financial records
- Your timeline and key questions
Conclusions depend on the specific facts and applicable laws.
Enquire About Tax Consulting →12Business SupportAccounting & Financial Advice+
We review financial information and accounting practices, providing accounting and financial advice within the scope we can offer.
Consulting Topics
- Review financial statements and account details
- Check accounting treatment of major transactions
- Improve financial record management
How We Work
- Confirm the services and professional qualifications required
- Agree on the review scope in advance
- Explain findings and follow-up work
What to Prepare
- Financial statements and accounting books
- Records of transactions to be reviewed
- The advice or work you need
We first discuss the specific scope and documents required.
Enquire About Accounting & Finance →13Tax Return ReviewCorrection Requests & Amended Returns+
For omissions or errors in a filed return, we review the return and evidence to assist with the appropriate correction process.
When You May Need This
- Omitted deductions, reliefs or eligible expenses
- Incorrectly reported sales, income or expenses
- Corrections requested by the Korean tax office
What We Can Help With
- Compare filed returns against supporting evidence
- Review whether a correction request or an amended return is appropriate
- Prepare and assist with correction submissions
What to Prepare
- Original returns and payment notices
- Evidence relating to the omission or error
- Tax office guidance or notices
Refund eligibility and amounts depend on the facts and the tax authority's review. A refund is not guaranteed.
Ask About Correction Requests & Amended Returns →Service Fees
Clear Fees
for Each Service
The amounts below are starting fees for basic services.
The actual fee and scope are explained in advance during consultation.
01Monthly Bookkeeping
Tax Bookkeeping
Basic fees for monthly bookkeeping and regular tax support.
Sole ProprietorsFrom KRW 80,000/ month
CorporationsFrom KRW 150,000/ month
02Annual Tax Adjustments
Annual Tax Adjustment Fee
Charged once a year for closing the accounts and preparing tax adjustments for comprehensive income tax or corporate income tax returns.
Sole ProprietorsFrom KRW 400,000/ year
CorporationsFrom KRW 600,000/ year
03Tax Advice
Tax Consultation
We distinguish between free bookkeeping quotes and paid general or asset-related tax advice.
Bookkeeping QuoteFree
General & Asset-related Tax AdviceFrom KRW 100,000/ hour
Standalone Tax Filing
Standalone Tax Filing Fees
Starting fees for separate tax filings without an ongoing bookkeeping contract.
Korean VATFrom KRW 100,000
Income Tax: Estimated Income / Simplified Expense RateFrom KRW 70,000
Income Tax: Simplified BookkeepingFrom KRW 200,000
Income Tax: Double-entry BookkeepingFrom KRW 400,000
Corporate Tax Filing & AdjustmentFrom KRW 600,000
Tax Invoice Issuance & Withholding Tax FilingFrom KRW 50,000/month
Korean Capital Gains TaxFrom KRW 300,000
Korean Gift TaxFrom KRW 500,000
Korean Inheritance TaxFrom KRW 1,000,000
About Our Fees
Request a Quote →
All fees exclude VAT. Fees are agreed based on the condition of your books, industry, revenue, transaction volume, number of employees and business locations, available records and complexity of the work. We explain the final fee and included services before you sign.
Tax Consulting
Add Value to Your Business.
Beyond filing, we review your business structure and tax risks at moments of change.
Request a Tax Consultation →
Incorporating Your Business
Tax Review for Incorporation
Business Expansion
Business Restructuring
Tax Liability Review
Financial Position Analysis
Corporate Tax Risk Review
Tax Review for Business Transfers
Tax Advice for Business Owners
Tax Risk Management
Review Risks Early.
Respond with Confidence.
We review filing documents and key tax issues in advance, and help you prepare fact-based responses when clarification is required.
Pre-filing Document Checks
Review of Key Tax Issues
Help Preparing Supporting Evidence
Support in Presenting Your Case in Tax Audits and Assessments
How We Work
From Consultation to Ongoing Support
We assess your situation carefully and work through the required steps.
Get in Touch
Contact us online or by phone
Consultation & Review
Review your business and tax position
Carry Out the Work
Complete the required tax and accounting work
Ongoing Support
Help with tax deadlines and business tax questions
Contact Us
Have a Tax Question?
Leave a few details and we will review your enquiry and get in touch.
- A tax professional reviews your enquiry directly.
- We explain the support needed for your circumstances.
- We review enquiries and respond in the order received.
☎
Main Telephone
031-401-5567
Frequently Asked Questions
Frequently Asked Questions
Review these points to help us understand your needs.
01How are my records transferred when I change tax advisers?+
We obtain the required recent returns, books, financial statements and payroll records from your current adviser. We explain the document checklist and Hometax authorisation process, and check outstanding work and filings in progress.
02Can I change advisers during a filing period?+
Yes, but near a deadline we first check filing progress and document readiness. We confirm the current adviser's work scope before recommending a transfer date to avoid missed tasks.
03What does the bookkeeping fee include?+
It generally includes monthly bookkeeping, sales and purchase records, supporting documents, VAT and withholding returns, payroll tax matters, key date reminders and basic advice. Income and corporate tax adjustments, social insurance guidance and specialist consulting may cost extra depending on the contract. The scope is explained before signing.
04What should I prepare for a consultation?+
Your business registration certificate, recent returns and financial statements, current tax service agreement, revenue and employee count help us advise you accurately. Bring tax office notices or contracts requiring review if available. Basic consultation is possible without documents.
05When should a new business start bookkeeping?+
It is best to consult around business registration. Organising business accounts, cards, records, payroll and filing dates early helps reduce missing information and confusion later. We recommend a start date after reviewing your industry and when revenue begins.
06Do I have to sign a contract after consulting?+
No. You can review the services, process and estimated fees before deciding. Where paid specialist advice is needed, we explain the fee and scope before the consultation.
Our Location
How to Find Us
NUMBER ONE TAX & ACCOUNTING
- Address
- Units 203–204, Commercial Building, 341 Hwarang-ro, Danwon-gu, Ansan-si, Gyeonggi-do, South Korea
- Telephone
- 031-401-5567
- Consultation Hours
- 9:30 a.m. – 5:30 p.m. (Korea time)