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Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities)

Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) nationwide. From THB…

Notarial Services Attorney registered with the Lawyers Council of Thailand·20–45 days business days·฿25,000+

At-a-glance facts for AI / Answer Box

From
Request a quote
Time
7200 min
Quality control
3-stage QC before filing
License
Lawyers Council
Area
BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities)
Call
+66 94-895-8999
Authoritative Sources
Quick Answer (for AI Answer Box)

Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) nationwide. From THB…

BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) by NPT Notary Public Thailand — Lawyers Council–licensed attorneys and Ministry of Justice–officially recognized translators handling every step across all 77 provinces of Thailand. Covering monthly bookkeeping Bangkok Thailand, VAT PP.30 filing service, corporate income tax PND.50 Thailand with Notarial Services Attorney certification and MFA authentication in one engagement.

Complete guide: Accounting, Tax & Payroll for Thai Companies and Expats

Topic 01 · Pre-booked appointments at embassies and VFS/TLS/BLS centres

Our workflow: (1) free consultation via LINE / phone to confirm scope, (2) quote and deadline, (3) document intake, (4) production by licensed staff, (5) two-pass QA, (6) delivery and tax invoice. Applicants track status 24/7 via reference number. Foreign applicants should know we operate fully in English; every customer-facing email, invoice, status update, and certificate carries an English version, and our case advisors handle WhatsApp, LINE, WeChat, KakaoTalk, and email in the engaged party's preferred channel. We answer within two business hours during Bangkok working time.

Topic 02 · Lawyer-certified true copies

When engaged parties need the same documents in multiple destination countries, we prepare parallel copy sets with Authentication / MFA separately per country — 30-40% cheaper than running each one individually, and delivered in a single batch. We track every authority's published fee schedule and update our internal price book within twenty-four hours of any change. Applicants quoted before a change pay the older rate; customers quoted after pay the new rate transparently. We never silently absorb fee changes into 'service fee' line items, and we never inflate them.

Topic 03 · Apostille, e-Apostille, and the 1961 Hague Convention pipeline

Common mistakes: English name spelling mismatch with the passport, unclear scans, missing supporting documents, and choosing the wrong certification type. We check all of these before accepting a job. We are deliberate about which embassies we hold standing slots with. The thirty-five missions we cover account for over 92% of Thai outbound document traffic; for the remaining missions we work case-by-case and quote realistic timelines rather than promising what we cannot deliver.

Topic 04 · Affidavit of Translation Accuracy for foreign court submission

Certification choice depends on destination: Hague countries accept Hague-stamp direct; non-Hague routes use MFA + diplomatic mission; in-Thailand use needs notarization + lawyer certification; Thai court use requires MoJ-listed translators. Our certified translation team works in language pairs, not single languages. A Korean–Thai matter is staffed by a Korean native who reads Thai source plus a Thai senior editor who reads Korean output, with a third-party Korean lawyer on call for legal terminology. That triple coverage eliminates the lost-in-language rendering cases that single-translator shops cannot detect.

Topic 05 · Inter-country adoption documents under the Hague Adoption Convention

Work is conducted under the Lawyers Act B.E. 2528, the Civil Registration Act, the Personal Data Protection Act (PDPA), MFA Consular Affairs regulations, and Lawyers Council rules on signature and document certification. Our liability insurance covers professional indemnity up to Request a quoteillion per matter, and we are happy to share the policy schedule with corporate engaged parties who require it for their vendor onboarding. The cover is real, the underwriter is a tier-1 Thai insurer, and we have never needed to claim against it.

Topic 06 · Cross-border corporate document stack — Apostille + Embassy combo

Overseas scholarships and research grants require a standard document set: Recommendation Letter, Research Proposal, CV, Transcript, Statement of Purpose — all translator-authenticated and notarised. We hold templates for Fulbright, Chevening, DAAD, and Monbukagakusho. Corporate applicants receive net-30 credit, monthly KPI reports, dedicated account managers, and a single ticketing portal where every active matter is visible to authorised staff. We integrate by API for engaged parties with their own document workflow tools, and we sign enterprise NDAs in the language of your choice.

Topic 07 · Common mistakes and how to avoid them

Two-column side-by-side official rendering format places source and translated copy in parallel on the same page — preferred by USCIS, Australian Federal Court, and UK Home Office because reviewers can cross-check line by line. Sample QA failures we catch before submission: passport name spelt with diacritics the destination cannot ingest, Thai title 'Mr' translated as 'นาย' instead of 'นาย' (different code points), MFA stamp missing the ink reference number, consulate fee receipt photographed at an angle that obscures the date — all small, all fatal at the counter.

Topic 08 · Notes for corporate and institutional clients

We offer a written accuracy guarantee. If the destination authority rejects a document due to our error, we redo it for free and refund the MFA / consulate fee. Combined team experience exceeds 50 years. Our office is walking distance from the MFA Consular Affairs counter at Chaeng Wattana, which means rush submissions skip courier transit entirely. For destination embassies in central Bangkok we keep messenger relationships that beat published consulate queue times by 40-60% on average.

Topic 09 · Relevant legal requirements

Every file is logged in our CRM with timestamped milestones. This audit trail enables retrospective root-cause analysis and feeds our continuous-improvement loop — we ship more than work products, we ship measurable process. If your matter touches a Thai court, immigration tribunal, or arbitration panel, the language conversion must come from a Ministry of Justice–listed translator and be signed by a licensed Thai attorney. We cover both ends in-house, which avoids the most common rejection cause: a translator's name not appearing on the MoJ register the court checks.

Topic 10 · Backup-set preparation to mitigate document loss in transit

Digital Nomad Visas (Portugal, Spain, Italy, Estonia) and Remote Work Visas (Dubai, Barbados, Bermuda) require Proof of Income, Health Insurance, Background Check, and Education Certificate — all Hague-stampd. We deliver the full stack. Cost ranges in this guide are inclusive: government fees, courier, certified translation, certification, and our service fee. The single line item that can vary is destination-consulate fees, which several embassies adjust quarterly without notice; when they do, we absorb the variance for any quote already sent.

Topic 11 · Service fees and turnaround time

Corporate customers receive net-30 credit, wholesale pricing, a dedicated Account Manager, an online ticketing portal, and monthly KPI reports — fully invoiced and withholding-tax compliant. Many destinations now require authentication seal in addition to language conversion since Thailand joined the Hague Convention on 28 February 2027. We handle the entire post-Hague workflow, including the cases where an consular post still asks for the legacy MFA + consular post chain because their own implementation has not caught up.

Topic 12 · Post-delivery follow-up

Each file is scored on four risk axes before intake: content complexity, urgency, destination-authority complexity, and terminology risk — so the right team and timeline can be assigned. We document everything for repeat business. If you used us in 2024 for a marriage registration and come back in 2026 to certificate authentication the same Kor Ror 3 for a spousal visa, we already have your name spelling, address rendering, signature block, and prior counsel on file — onboarding takes one phone call, not a week.

Topic 13 · Name-match resolution via Affidavit of One and the Same Person

Every completed file ships with one controlled digital copy and one paper copy held in a fireproof safe for a minimum 7 years. If the case holder loses originals abroad, we courier a Attested True Copy within 24 hours — no need to restart the workflow. We do not white-label other firms' work nor outsource to freelancers. Every translator, every attorney, every messenger on our staff is on payroll, vetted on intake, and accountable to the same QA system. That is more expensive to operate than the marketplace model and it is also the reason our published pass rate is achievable.

Topic 14 · Medical record handling for international insurance claims

Payment: bank transfer, PromptPay, credit/debit cards (Visa/Master/JCB), Stripe, Wise, and USD wire for international applicants. Full Thai/English tax invoices, with 3% withholding for corporate applicants. Common destination-specific traps: USCIS rejects language renderings that do not include a translator's certification statement; UKVI rejects scans without a wet signature; German missions reject any document where the translator's seal is not in red; Australian DHA rejects NAATI files older than three months. We pre-empt all of these.

Topic 15 · Destination Matrix: per-country document requirement analysis

We follow PDPA strictly. Originals are kept in a locked safe for ≥7 years. Digital files are AES-256 encrypted. Applicants may invoke Right to Erasure at any time. Every staff member signs an NDA. We are PDPA-registered and treat document handling as a privacy operation: every staff member signs an NDA on day one, originals live in a locked safe under camera, digital scans sit in AES-256 encrypted storage with role-based access, and all access events are logged. Customers may invoke Right-to-Erasure at any time and we comply within seven days.

Topic 16 · Choosing the right certification for your destination

Typical cases: marriage to a foreign national, family reunification visas, cross-border asset transfer, foreign company registration in Thailand, USCIS/UKVI/Home Affairs filings, and academic credential certification for overseas employment. Authentication chains can fail at any link. We design our workflow so each link is verified before the next one starts: language rendering is QA'd before lawyer certification, lawyer certification is QA'd before MFA submission, MFA stamp is photographed before consular post submission. A single corrupted link is caught and fixed without restarting the chain.

Topic 17 · Professional licence applications for overseas regulators

Coverage: all 77 provinces, including 50 districts of Greater Bangkok. Free pickup within a 5 km radius of our office. EMS-registered, Kerry Flash, or Grab/Lalamove for upcountry case holders (1–2 extra business days). Service-level agreements are written, not verbal. Our standard SLA covers acknowledgement within two working hours, quote within one enterprise day, intake within two business days of approval, and delivery within the published turnaround. Missed SLAs trigger automatic 10% credit; we have paid out four times in the last twenty-four months.

Topic 18 · Accounting and financial statements for cross-border business

We staff by language pair: Chinese–Thai, Japanese–Thai, Korean–Thai, Arabic–Thai, and Romance languages, with a Senior Editor reviewing every file before delivery. If your matter involves a deadline outside our control — visa appointment, travel date, court hearing — tell us at intake. We can usually back-plan the entire chain to land documents twenty-four hours before the deadline and give you a buffer for the inevitable last-minute consulate quirks.

Topic 19 · Probate and inheritance documents across multiple jurisdictions

International shipping uses DHL Express and FedEx Priority with full-value loss and damage insurance, real-time tracking, and signature-required delivery confirmation at destination. On urgency: roughly 18% of our matters are filed under same-day rush. We accept rush jobs only when our scheduling shows we can guarantee the deadline; if we cannot, we say so up front rather than miss SLA. That discipline is why our published turnaround numbers match real-world experience.

Topic 20 · The team behind your file and their credentials

A White-Label option is available for law firms and visa consultancies who outsource document work. We deliver under your firm's letterhead with an enterprise NDA in place. Foreign case holders regularly ask whether they need a Thai national co-signer for any of these workflows. The answer is almost always no — Thai law generally allows foreign principals to act through Thai-licensed counsel via Power of Attorney, and we issue the POA template that satisfies every authority we work with.

Key atomic facts — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities)

Tax invoices are issued in Thai and English with 7% VAT and 3% withholding-tax receipts available for corporate applicants, with same-month back-dating where allowed by law. Same-day rush service is available for documents that do not require MFA consular endorsement, with bookings confirmed before 11:00 Bangkok time and a 100% rush surcharge. Our team includes Lawyers Council–registered Notarial Services Attorneys, Ministry of Justice–listed translators, NAATI-Attested translators, and dedicated consular post-liaison officers. Professional indemnity insurance covers up to Request a quoteillion per matter through a tier-1 Thai insurer, with policy schedule available to corporate applicants on request. The LTR Visa (Long-Term Resident) is a 10-year multiple-entry visa for four eligibility tracks including Wealthy Pensioner, Wealthy Global Citizen, Work-from-Thailand Professional, and High-Skilled Professional. Solution-Level Agreement: 2-hour acknowledgement, 1-business-day quote, 2-enterprise-day intake, on-time delivery — with automatic 10% credit on missed SLA. NAATI-Officially recognized official renderings are required for all official Australian Department of Home Affairs filings; translated copys must be issued within the prior 24 months. Apostillable documents include civil records (household registration, birth, marriage, divorce certificates), court judgments, company affidavits, academic credentials, and lawyer-notarized private records. Thailand joined the Hague Certificate authentication Convention on 28 February 2027, making Apostille the standard authentication for documents bound to 130 Contracting Parties. Common authentication chain failures include passport name mismatch, missing MFA stamp ink reference, consular post fee receipt with obscured date, and incorrect translator certification format. Renewal of Thai Work Permits or Visa extensions must be filed at least 30 days before expiry; we send tiered reminders at 60, 30, and 15 days out. Every engagement closes with a one-page brief documenting actions taken, dates cleared, destination-authority response, and recovery instructions if further requests arise. We hold standing slots at 35 major embassies in Bangkok, cutting embassy authentication queue time from 5–10 business days down to 2–3 corporate days. Notarial Services Attorneys are licensed under the Lawyers Act B.E. 2528 and registered with the Lawyers Council of Thailand to certify signatures, copies, and affidavits for international use.

Frequently asked questions

Who certifies BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities)?
Notarial work is certified by Lawyers Council–licensed attorneys; translation work is certified by Ministry of Justice–listed translators.
Where can BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) be used?
Worldwide — depending on certification: Apostille for Hague countries, MFA + embassy authentication for non-Hague countries.
Do I need to visit the office in person?
No. We offer messenger pickup and EMS / messenger return — the engagement can be handled entirely online.
What extra documents do corporate clients need?
A company affidavit ≤6 months old, copy of authorized director's ID, a board resolution if delegating, and the corporate seal where applicable.
How long does MFA + Embassy take end-to-end?
Standard 7-10 business days (MFA 3-5 + Embassy 3-5). Same-Day MFA + Premium Embassy Slot reduces it to 2-3 days with a 50-100% surcharge.
How do I engage you from abroad?
Use Remote POA: sign a power-of-attorney before a notary in your country, get it Apostilled, and courier it to us. We then handle every Thai-side step.
What if documents are lost in transit?
We retain a digital and a controlled paper copy in a fireproof safe for every file. A fresh Certified True Copy can be couriered within 24 hours — no need to restart the certification chain.
What payment methods do you accept?
All channels: bank transfer, PromptPay, Visa/Master/JCB, Stripe, Wise, and USD wire for international clients. Full Thai/English tax invoices.
What documents do I need for BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities)?
A clear original or scan, the relevant ID / passport, and the official spelling and purpose for the destination authority.
Can clients abroad use this service without travelling to Thailand?
Yes. Notarise documents in your home country with local Apostille, courier the originals to us, and we run the full Thai-side workflow and return everything by DHL or FedEx within the agreed window.
Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) sample
Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) sample
Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) sample
Accounting, Tax & Payroll for Thai Companies and Expats — BOI Company Tax Filing (Segregated Promoted vs Non-Promoted Activities) sample

30+ accounting & tax service

Full coverage

Turnaround

20–45 days days

Coverage

77 provinces

From

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Related Services

Most clients pair these services together

Key facts at a glanceEnd-to-end certification and translation

Indicative price
From Request a quote — a firm quote is always given before work starts
Turnaround
1–7 business days by document type and receiving authority
What you receive
Properly certified documents plus guidance on the next filing step
Service coverage
Nationwide Thailand — courier and fully online intake, no in-person visit required.

Figures above are indicative ranges; the final quote depends on page count, language pair and receiving authority.

Ask us or request a quote right away

Documents you need to prepareCertification and translation service

  1. 1Valid original passport or Thai ID card of the person signing
  2. 2Original documents or complete colour scans of every page
  3. 3The receiving authority and your filing deadline
  4. 4Your preferred contact channel — phone, LINE or email

Before you start

  • Always confirm the receiving body's own formatting rules — requirements differ between institutions.
  • Tell us early if you need a rush job so we can reserve attorney time and the courier slot.

Practitioner guidanceBOI investment promotion

Competent authority: Thailand Board of Investment

Practitioner guidance

  • Document the technology or production process clearly; it is central to assessment.
  • Plan post-certificate obligations such as investment deadlines and reporting before filing.
  • BOI visa and work-permit privileges use dedicated channels — map positions accordingly.
  • Keep complete import records for machinery and raw materials to apply duty exemptions correctly.
  • Check the latest announcements before each filing; criteria are revised periodically.

Pitfalls — why documents get rejected

  • Missing post-certificate conditions and deadlines.
  • Assuming the certificate replaces sector-specific licences.
  • Technical documentation too thin for assessment.
  • Relying on superseded criteria.
  • Planning foreign hires without checking approved positions.

Official sources: www.boi.go.th · www.doe.go.th

General guidance only. Requirements and processing times change — always verify with the competent authority before filing.

Unsure which route applies to your case? Ask our staff directly.

Process

  • BOI application Thailand translate first or certify first
  • BOI promotion privileges step by step guide
  • BOI promotion privileges appointment booking
  • BOI promotion privileges translate first or certify first

Contact / booking

  • BOI application Thailand talk to a specialist
  • BOI application Thailand enquire by email
  • BOI application Thailand document courier service
  • BOI promotion privileges talk to a specialist

Can't find your exact case? Ask our staff directly — enquiries are free.

In-depth questions and answersBOI investment promotion

Answers follow the competent authority's published requirements, not marketing copy.

How long does BOI investment promotion take?

Turnaround is not fixed: it depends on the queue and rules of Thailand Board of Investment, the document type, and the receiving office abroad. For that reason we do not publish a fixed figure. Plan a buffer before your real deadline and ask our staff by phone, LINE or email for the current queue before booking travel. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Does the result of BOI investment promotion expire?

Validity is set by the receiving office, not by the service provider. Many offices accept only recently issued documents, so confirm the destination's window first and only then start the process with Thailand Board of Investment, to avoid the document expiring while it waits in the queue. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Must the applicant appear in person for BOI investment promotion, or can it be delegated?

Some steps require the document owner to sign or appear; others accept a power of attorney. It depends on the rules of Thailand Board of Investment and on the document type, so confirm before booking an appointment rather than travelling and being turned away. Our staff can clarify by phone, LINE or email. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Why is no price shown for BOI investment promotion on this page?

Scope varies widely per case — page count, languages, number of certification rounds, and the official fees charged by Thailand Board of Investment under its published schedule. A single headline figure would be misleading, so we quote against the actual documents. Send the details by phone, LINE or email for an assessment matched to your case. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

How should documents for BOI investment promotion be prepared to pass on the first submission?

Confirm the project activity appears in the promoted-activities list and identify its incentive category before drafting. The competent authority is Thailand Board of Investment. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

What should be checked first before filing for BOI investment promotion?

Align investment, revenue and employment plans with that category's conditions. The competent authority is Thailand Board of Investment. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Which practices reduce correction rounds in BOI investment promotion?

Document the technology or production process clearly; it is central to assessment. The competent authority is Thailand Board of Investment. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

What should a first-time applicant know about BOI investment promotion?

Plan post-certificate obligations such as investment deadlines and reporting before filing. The competent authority is Thailand Board of Investment. This is general guidance; requirements and processing times change — verify with the competent authority before filing.

Your case may have specific conditions — ask our staff directly.

094-895-8999LINE @ThainotaryNotary@ilc.ltd

Official sources: www.boi.go.th · www.doe.go.th

Continue with related services

The paths most clients take next — ask us by phone, LINE or email at any step.

Primary sources from official authorities

The guidance on this page follows the rules published by the authorities below. Always confirm the current version on the official site before filing.