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Five things your US business needs

From formation to banking, ITINs, tax filing and real estate tax — handled in the right order, in one place.

01

US Company Formation

Formation of California and Delaware LLCs and C-Corps, EIN application, and the steps you need to start doing business.

We start by deciding which entity type and which state fit your plan, then handle the filing and EIN application remotely from Korea.

When you need it

  • Korean companies selling to or contracting with US customers
  • Sellers preparing to sell on Amazon and other US platforms
  • Startups preparing to raise US investment
  • Individuals who want to hold US real estate through an entity

What we cover

  • Advice on entity type (LLC / C-Corp) and state (California / Delaware)
  • Name check, preparation and filing of formation documents
  • Registered Agent arrangement
  • EIN (Employer Identification Number) application
  • Guidance on operating agreement and ownership structure
  • Next steps toward banking and annual tax filing

Typical documents

  • Passport copies of owners / officers
  • 2–3 proposed company names
  • Short description of the business
  • Ownership structure (members and percentages)

Good to know

  • Even if you form in another state, doing business in California can trigger California registration and tax obligations.
  • California charges an annual minimum franchise tax ($800) on corporations and LLCs (first-year exceptions may apply).
  • Non-residents without an SSN or ITIN apply for an EIN with Form SS-4; IRS processing times vary.
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02

US Business Bank Account

Support in Korean for remote opening of a US business bank account and the documents it requires. Approval depends on each bank’s review and the applicant’s situation.

So you can apply from Korea without flying to the US, we walk you through each document and step the bank asks for.

When you need it

  • Owners who have a US company but no bank account yet
  • Businesses that need an account to receive US platform payouts
  • Anyone who wants to open an account without visiting the US

What we cover

  • Guidance on banks that accept remote applications for your situation
  • Help with the application and document preparation
  • Guidance when the bank asks for additional information
  • Basics after opening (transfers, cards)

Typical documents

  • Formation documents (Articles, etc.)
  • EIN confirmation letter
  • Passport / ID of the owner
  • Business description or website
  • Proof of address

Good to know

  • Account opening depends on the bank’s review and the applicant’s situation; approval is not guaranteed.
  • Each bank has its own country, industry and document requirements.
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03

ITIN Application & Renewal

We check your eligibility and required documents for an Individual Taxpayer Identification Number (ITIN) and support new applications and renewals.

First we confirm whether you really need an ITIN and on what basis to apply, then guide you through passport certification and Form W-7.

When you need it

  • Individuals who must report US rental income
  • Owners who need individual filings related to a US entity or partnership
  • Anyone claiming a US tax refund
  • Spouses or dependents who need an ITIN

What we cover

  • Eligibility and reason-for-applying check
  • Help completing Form W-7
  • Guidance on passport certification (original, certified copy, acceptance agent)
  • New applications and renewal of expired ITINs
  • Status updates after submission

Typical documents

  • Passport (proof of identity and foreign status)
  • Documents supporting the reason for applying (e.g., tax return)
  • US address (if any)

Good to know

  • An ITIN expires if it is not used on a federal tax return for three consecutive years.
  • Most applications are filed together with a tax return; some exceptions allow a stand-alone application.
  • IRS processing times vary by season.
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04

US Annual Tax Filing

Together with our partner accounting firm, we support tax filings for US entities and US rental income.

We first sort out which returns you need and what to prepare. The filing itself is prepared and signed by US tax professionals at our partner firm.

When you need it

  • US corporations and LLCs approaching their annual filing
  • Foreign-owned LLCs that must file even with no revenue
  • Non-residents with US rental income
  • Anyone who missed a prior-year filing

What we cover

  • Identifying required returns (Forms 1120, 1065, 5472, 1040-NR, etc.)
  • Bookkeeping and document checklist
  • Federal and state filing through our partner firm
  • Deadline and extension guidance
  • Advice on catching up on unfiled years

Typical documents

  • Formation documents and EIN
  • Bank statements
  • Revenue and expense records
  • Prior-year returns (if any)
  • Rental income and expense records (if applicable)

Good to know

  • A foreign-owned single-member LLC must file Form 5472 every year even with no revenue; failure to file can carry a $25,000 penalty per form.
  • For calendar-year filers, C-Corps generally file by April 15 and partnerships (multi-member LLCs) by March 15.
  • Returns are prepared and signed by US tax professionals at our partner firm.
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05

US Real Estate & Asset Tax Advisory

Through partner professionals, we advise on forming an entity to buy US real estate and on the tax side of holding, selling and transferring assets.

Before you buy, sell or pass on a property, we review the tax questions in advance with our partner professionals.

When you need it

  • Deciding whether to buy US property personally or through an entity
  • Sorting out taxes on a rental property
  • Planning a sale
  • Considering a gift or inheritance to family

What we cover

  • Forming an acquisition entity (LLC)
  • Linking rental income to annual filings
  • Pre-sale review of taxes and withholding
  • Advice on gifts, inheritance and other transfers (partner professionals)

Typical documents

  • Property location and purchase details
  • Ownership structure
  • Rental income and expenses
  • Sale or transfer plans

Good to know

  • When a foreign person sells US real estate, a portion of the sale price (generally 15%) may be withheld under FIRPTA.
  • The US estate tax exemption for non-resident aliens is far lower than for US citizens.
  • Korean residents should also consider their reporting obligations under Korean tax law.
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This page provides general information. Decisions on your specific situation, and the preparation and signing of returns, are handled by our partner accounting firm and professionals after consultation. Outcomes of bank and agency reviews follow each institution’s criteria.

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