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NYC Legal & Notary Services
Legal · Notary · Translation
NYC Legal & Notary
NYC Legal & Notary Public attorney team, Bangkok — Wat Arun riverside
NYC Legal & Notary Public attorney team, Bangkok — Wat Arun riverside

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🇺🇸 United States · กรมสรรพากร

Corporate Income Tax Filing for American clients

ยื่นภาษีเงินได้นิติบุคคล (ภ.ง.ด.50/51) · สหรัฐอเมริกา

Double Tax Treaties (DTT) are the lever skilled tax advisers pull to cut foreign clients' tax bill by up to 30%. This is the Corporate Income Tax Filing guide written for American clients (🇺🇸 United States) by NYC Legal — quoted after document review · ตามปฏิทินภาษี · filed at กรมสรรพากร. Covers documentation, coordination with banks/embassies, and the Thailand–United States Double Tax Treaty.

Free Consult +66 83-249-4999

Why American clients need Corporate Income Tax Filing

Who needs it: บริษัทจำกัด · ห้างหุ้นส่วนนิติบุคคล · สาขาต่างประเทศ.

American clients pursuing "Beach condos + retirement homes + Amity-protected companies" in Thailand typically need Corporate Income Tax Filing before launching or buying.

Leverage: Treaty of Amity & Economic Relations (1966) — US citizens may own ≥99% of most Thai businesses — our tax team combines it with the Thailand-United States DTT to reduce your global tax bill.

What you get with NYC Legal

• วางแผนภาษีลดสิทธิประโยชน์ • หลีกเลี่ยงเบี้ยปรับเงินเพิ่ม

Thailand ↔ United States Double Tax Treaty

Thailand has a DTT with United States preventing double taxation on dividends, interest, royalties, rent and capital gains.

We obtain the Certificate of Residence (R.O.21/22) translated into English so you can file the credit with United States tax authorities.

For periodic filings — we compute, file online, and capture the official receipts.

Documents & process for American clients

Passport + visa + Work Permit (if held) + Thai Tax ID.

Source-country business or income documents from United States, translated to Thai + Apostille.

Workflow: 1) Free consult in English 2) Document audit 3) Petition/return preparation 4) Filing & follow-up 5) Monthly/quarterly summary report.

Fees & turnaround

Starting at quoted on request · ตามปฏิทินภาษี.

American clients on a monthly retainer save 15–25% and receive a free Quarterly Tax Review.

Invoices issued in English so you can claim the deduction back home under the DTT.

FAQ

Do American nationals pay Thai tax if they stay under 180 days?

No — you are not a Thai tax resident. Only Thai-sourced income (e.g. rental from a Thai condo, salary from a Thai employer) is taxable.

What does Corporate Income Tax Filing start at?

From quoted on request + 7% VAT — fixed quote before we start.

How long does it take?

ตามปฏิทินภาษี at กรมสรรพากร once documents are complete.

How does the Thailand-United States DTT actually reduce my tax?

We obtain the Certificate of Residence from the Revenue Department, then you file it with the United States tax authority to credit the Thai tax already paid — up to 100% of the overlap.

Can this be done while I'm overseas?

Yes — sign a POA + courier documents via DHL. We file and return the receipts.

Other tax services for American clients

VAT RegistrationVAT Refund FilingWithholding Tax FilingPersonal Income TaxTransfer Pricing DisclosureTax Audit Defense

Corporate Income Tax Filing for other North America nationalities

🇨🇦 Canada

Frequently Asked Questions

Can NYC Legal service be used for visa and international marriage applications?

Absolutely. NYC Legal service prepared by NYC Legal is accepted for: all visa categories (Schengen, US, UK, AU, JP, KR, CN), marriage registration with foreign nationals, study-abroad applications, work permits, and submissions to foreign government agencies.

Can NYC Legal service be handled online?

Yes — NYC Legal service can start online via LINE @nycli: send a photo of your document for a quote, then book an in-office signing (BKK / Khon Kaen / Udon / Nong Khai) or request Mobile Notary signing in Bangkok metro (additional travel fee applies).

Where is NYC Legal service accepted?

NYC Legal service from NYC Legal is accepted by: the Lawyers Council of Thailand (Notary Public), Ministry of Foreign Affairs Consular Department (MFA), and 90+ foreign embassies in Bangkok — ready for Apostille and embassy attestation.

What is the starting fee for NYC Legal service?

NYC Legal service starts quoted after document review per set (varies by document type and page count), plus government fees ~quoted on request and Kerry/EMS courier quoted on request. Free quote via LINE or +66 83-249-4999.

What documents do I need to prepare for NYC Legal service?

For NYC Legal service you need: (1) Original ID/passport, (2) Original document(s) to be processed, (3) House registration copy (Thai nationals), (4) Power of Attorney (if a representative attends). NYC Legal sends a checklist via LINE before your appointment.

Is NYC Legal service available outside Bangkok?

NYC Legal has 4 offices: Bangkok HQ (Sathon), Khon Kaen, Udon Thani, and Nong Khai — and serves clients nationwide via Kerry/EMS registered courier and a free 15-minute video consultation before any engagement begins.

Directly related topics

Workflow Timeline — Step-by-Step Process

Our Corporate Income Tax Filing workflow for clients in United States is engineered by attorneys and paralegals trained under the Lawyers Council of Thailand, ensuring documents finish within the window you need for visa filing, immigration interviews, or international counterparties. Every step is logged in our CRM and tracking notifications are pushed to your email and LINE in real time.

  1. 1:00
    Notary Public Signing

    A licensed Notarial Services Attorney verifies identity & intent, then signs and seals per Lawyers Council of Thailand standards.

  2. Day 5–7
    Delivery & Close

    Worldwide courier (DHL/FedEx) with full VAT receipts under NYC Translation Co., Ltd.

  3. 0:00
    Intake & Quote

    Send document scans + destination country via LINE @nycli. Our team replies within 15 minutes during business hours with an itemised quote and ETA.

  4. Day 3–5
    Embassy / Apostille

    Forwarded to destination embassy, or Apostille issued for Hague Convention member states.

  5. 1:30
    Certificate Issuance

    Case-numbered certificate issued; PDPA-compliant PDF copy emailed to you the same day.

  6. Day 2–3
    MFA Legalisation

    Submission to Department of Consular Affairs at quoted per page (normal) or quoted per page (express).

Service Comparison Matrix

Clients in United States choose between three delivery modes based on timeline, budget, and document type. We will recommend the best fit during the free consultation.

ModeBest forTurnaroundAdd-on fee
Walk-in (office)Originals on hand, fixed appointment30–60 minNone
Mobile Notary (we travel)VIP, elderly, bulk documentsSame dayquoted on request (free if 3+ docs)
Online Video NotaryEligible electronic documents20 minquoted on request
Express MFA + Embassy24–48 hr deadlines1–2 days+50%–100%
Worldwide shippingClients outside Thailand3–7 daysquoted on request (DHL/FedEx)

Hyper-local Trust Signals

NYC Legal has continuously served Notary cases in United States (Thailand) since 2016. We understand the documents this neighbourhood needs most — work-permit affidavits, cross-border powers of attorney, and real-estate authorisations for foreign counterparties.

  • ✓curated verified case files (4.9/5) including clients from United States
  • ✓On-the-ground familiarity with local district offices and post offices
  • ✓Multilingual paralegals (Thai/English/Chinese/Japanese) for expats in United States
  • ✓After-hours appointments for 9-to-5 professionals in United States
  • ✓Grab/Lalamove pickup within 10 km of United States — no surcharge for repeat clients

Authority & Citations

This page references regulations from the Lawyers Council of Thailand, the Department of Consular Affairs (MFA), and the 1961 Hague Apostille Convention — Thailand acceded as a member state in 2023.

Reviewed by the NYC Legal editorial team. Last verified 2026-08-26. Reference seed: en-fb-nat-tax/United States.

In-depth Questions Clients Ask Most

These are the most frequent questions clients in United States ask before booking Corporate Income Tax Filing. Each answer is reviewed quarterly by our editorial team against current Lawyers Council, MFA, and embassy guidance, so the dates, fees, and process windows on this page stay accurate.

How long does Corporate Income Tax Filing typically take for clients in United States?
Standard turnaround is 1–2 business days for the notary stage, plus 2–3 days at the Ministry of Foreign Affairs and 1–7 days at the destination embassy depending on the mission. Express handling can compress the full chain into 24–48 hours for clients with a verified visa appointment or court hearing.
Can the documents be used outside Thailand without further legalisation?
Documents notarised in Thailand are accepted abroad only after the chain — Notary → MFA → Embassy or Apostille — is complete for the destination country. Since Thailand's Hague Apostille membership took effect on 28 February 2027, a single Apostille now replaces embassy legalisation for member states such as the US, UK, Japan, Korea, Germany, France, Australia, and 100+ others.
What identification documents must I bring to the appointment?
For Thai nationals: national ID card plus the original document. For foreigners: passport plus a valid Thai visa or entry stamp. Corporate clients should bring the company affidavit (DBD), the authorised signatory's ID, and the company seal if used in the document.
Do you provide certified translations alongside the notary service?
Yes. NAATI-credentialed translators (English, Chinese, Japanese, Korean, German, French, Spanish, Arabic) work in-house, so the translated version can be notarised the same day. This avoids the common delay of bouncing between a translation vendor and a notary office.
What is your refund or rebooking policy?
If the document is rejected by the MFA or destination embassy due to an error on our side, we re-process at no charge and refund all MFA / embassy fees. If the rejection is due to client-provided information (e.g. spelling or missing supporting documents), we offer a 50% rebooking discount.

Pre-Submission Compliance Checklist (12-Point)

Before we file your Corporate Income Tax Filing with the MFA or any embassy, every case passes a 12-point checklist. This is the same checklist used internally by our senior counsel during the final QA step.

  1. 01Identity documents match the spelling on the destination country's visa or contract
  2. 02All signatures appear in blue ink on the original (black ink is rejected by several embassies)
  3. 03Date format matches destination country convention (DD/MM/YYYY vs MM/DD/YYYY)
  4. 04Corporate documents include current DBD affidavit (issued within last 90 days)
  5. 05Powers of attorney specify scope, duration, and revocation clauses per destination jurisdiction
  6. 06Educational transcripts bear original university seal, not photocopy
  7. 07Medical certificates include licensed physician registration number (per MFA rule 2021)
  8. 08Marriage and birth certificates are MOI-issued originals, not Khor Ror 2 copies
  9. 09Translation pages stapled and sealed to source document with translator declaration
  10. 10Stamp duty (where required) affixed before notarisation, not after
  11. 11MFA submission cover letter lists destination embassy and intended use
  12. 12Tracking number registered in our CRM and shared with client via LINE @nycli

Scope of work we handle in this practice area

Each of the 10 items below is a matter type our team handles end-to-end — document preparation, certification, and submission to the relevant Thai or foreign authority.

ภาษี บัญชี และการเงิน(5)

  • จ้างทำบัญชีรายเดือนธุรกิจต่างชาติ
  • trade barrier and import-export restriction auditing service
  • บริการตรวจสอบความโปร่งใสของห่วงโซ่อุปทาน (Supply Chain Transparency Audit)
  • GRI-aligned sustainability reporting compliance and auditing service
  • QuickBooks desktop and online setup for foreign companies

ยื่นหน่วยงานราชการ(5)

  • บริการติดตั้งโปรแกรมบัญชี Xero สำหรับบริษัทต่างชาติ
  • บริการขอเจรจาข้อยกเว้นทางภาษีกับกรมสรรพากรและสำนักงาน BOI
  • บริการยื่นภาษีหัก ณ ที่จ่าย และนิติบุคคล
  • บริการยื่นภาษีเงินได้บุคคลธรรมดา Expat
  • บริการติดตั้งโปรแกรมบัญชีสำหรับบริษัทต่างชาติ

Not listed? Send the document by LINE @NYCLI and we will confirm feasibility, fee, and turnaround.

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