Full-scope corporate setup, BOI promotion, Foreign Business Licenses (FBL), work permits, bilingual bookkeeping, and cross-border tax compliance across Thailand.
Bilingual
English & Thai Desk
2564
Company registered (BE)
CPA
Separate audit scope
Service illustration, not a verified photograph of our staff or premises
Start with the job at hand
DBD-registered juristic person
Separate bookkeeping and CPA audit scope
Review tax returns and filing evidence
Assess e-Tax Invoice & e-Receipt records
Cloud document workflow, any province
Confirm your preferred language before meeting
International desk
Prepare records to Thai requirements and agree the communication language before engagement. If a parent company needs English reporting or consolidation data, specify the format, reporting period and required adjustments when defining the scope.
Shareholding review under the Foreign Business Act, statements structured for an FBL application, and bank capital certification.
Segregate promoted (tax-exempt) income from ordinary income, report to promotion-certificate conditions, and prepare the annual BOI submission.
Check Thai tax residence using the 180-day calendar-year threshold, the appropriate PND.90/91 form, treaty conditions and the treatment of remitted foreign income.
Reconcile capital, staffing, payroll and PND.1 records. Visa, work-permit and investment-promotion conditions can differ and must be checked for the application category.
10% dividend withholding, reduced treaty rates where available, and the documentation your bank requires for outbound transfers.
Disclosure Form and transfer-pricing documentation for groups above the revenue threshold, with defensible economic analysis.
English Desk
Every core service has a full English page, English monthly reporting and English review meetings. Scope and fees are quoted per case after we see your actual document volume — we do not publish a price list.
Request a quote: LINE @THAIL · Call centre 064-2894888 · Contact@thailaw-accounting.co.th
Special offerSwitch accounting firms: check outstanding work, opening records and included fees
Review handover scopeAll services
Full-service accounting & tax →
Monthly bookkeeping, tax filing, audit support and industry-specific packages.
Get a quote
A quote scoped to your actual workload →
Share your business type, document volume and outstanding filings by LINE or email for a scoped written quotation.
FAQ library
900+ accounting & tax answers →
Find questions by tax form and business situation, with links to explanations and document preparation.
Accounting services
From day-one incorporation through monthly books, every statutory filing, year-end closing and audit, up to specialist work such as transfer pricing, crypto tax, and Revenue audit defence.
Chart of accounts, entries and reconciliation, with bookkeeper qualifications and engagement scope checked before agreement.
Quoted per engagement
Promoters, capital and Civil and Commercial Code clocks checked before filing, then tax and social-security registrations planned once the juristic-person number issues.
Quoted per engagement
Monthly and annual return preparation, filing-calendar checks and submission evidence.
Quoted per engagement
Review applicable tax relief, BOI conditions and treaty eligibility against the business facts.
Quoted per engagement
Annual, dormant and multi-year backlog statements prepared for an independent auditor and DBD filing.
Quoted per engagement
Records and schedules ready so the independent auditor can finish before the shareholders' meeting.
Quoted per engagement
Payroll runs, WHT, SSO filings and payslips handled as one service.
Quoted per engagement
Configure the software against Thai-language, tax-invoice, VAT-report and retention rules before the old system is switched off.
Quoted per engagement
English / Chinese support — BOI accounts, transfer pricing, treaty withholding.
Quoted per engagement
Chart of accounts, KPIs, and audit scripts tailored to each industry — never one-size-fits-all.
Quoted per engagement
Sort taxable events, value them in baht, apply one cost method for the year and separate amounts inside the Ministerial Regulation 380/399 exemptions before PND.90 or PND.50.
Quoted per engagement
Count presence days under section 41, separate Thai-source from foreign income, test remittances under Por.161/162, compute treaty credits and file PND.90/91.
Quoted per engagement
Cash forecasts, budgets and management reports that check the legal limits on capital, dividends and loans before options are proposed.
Quoted per engagement
Prepare the application, sign PDF/XML and connect your ERP to transmit data under the route the Revenue Department approves.
Quoted per engagement
Check disclosure duties and organise pricing evidence for actual domestic and cross-border related-party transactions.
Quoted per engagement
Tell an invitation from a section 19/23/88/4 summons, count deadlines from the right starting point, assemble evidence in the order requested and prepare the section 30 appeal within 30 days.
Quoted per engagement
A registration address with written consent to use the premises, mail handling and readiness for Revenue Department site checks.
Quoted per engagement
Prepare PP.01 and premises evidence, track PP.20 review, and assess online-filing enrolment and tax-invoice templates.
Quoted per engagement
Capital increases, director changes, address moves, new objectives, articles amendments — plus the follow-through with the Revenue Department, Social Security and your bank.
Quoted per engagement
A legally complete closure, not merely a stop in filings: dissolution resolution, creditor notice, closing accounts, audit, tax clearance and final liquidation registration.
Quoted per engagement
We take over what the previous office abandoned: reconstruct missing records, produce several years of accounts, and plan fine payments against available information and agency assessments.
Quoted per engagement
From eligibility assessment and application through segregated promoted-activity accounting, annual reporting, and protecting the tax holiday.
Quoted per engagement
Organise revenue projections and capital evidence for the application adviser; approval is not assured.
Quoted per engagement
Map accounting records, access permissions and retention needs separately from PDPA legal advice.
Quoted per engagement
Review overdue years, estimate exposure from available records and track filing acknowledgements; confirm entity status with the authority.
Quoted per engagement
Reconcile customs entries to the ledger and review evidence for input VAT or zero-rating; refund outcomes are not assured.
Quoted per engagement
Test samples from receipts and payment cycles and propose controls for management to assess before use.
Quoted per engagement
Separate cost components and assumptions by production line to inform pricing with traceable data.
Quoted per engagement
Reconcile platform reports against real bank credits before the Revenue Department asks first.
Quoted per engagement
A handover with a signed inventory of records and verified opening balances before month one.
Quoted per engagement
Accounts and reports that explain their figures, supporting committee and member review at the meeting.
Quoted per engagement
Close the gap between what is on the shelf and what is in the accounts before the auditor raises it.
Quoted per engagement
Collect income sources and allowance evidence, then identify missing records before calculating and filing.
Quoted per engagement
Review revenue and supporting records to assess registration duties, filing requirements and reconciliation items.
Quoted per engagement
Doing it yourself
Receipts in a box, tax invoices in a chat thread, transfer slips in a banking app — then filing day arrives and every document has to be chased one by one.
Allowances, incentive conditions and online filing channels keep changing. Reading up once is never enough — it takes year-round attention.
A few days late, a figure in the wrong box, or a missing supporting document turns into fines and surcharges payable after the fact.
Owners lose weekends to reconciliation work that an accounting team completes as routine process.
Tax calendar
Check the required return and notice period before using RD’s eight-day extension. SSO is not covered. Agree reminders and document cut-offs in the engagement.
PP.30
VAT return (PP.30)
By the 15th of the following month
RD online +8 days if eligible; base due dates 1 Feb 2024–31 Jan 2027
PP.36
Self-assessed VAT (PP.36)
By the 7th of the following month
RD online +8 days if eligible; base due dates 1 Feb 2024–31 Jan 2027
PND.1
Payroll withholding (PND.1)
By the 7th of the following month
RD online +8 days if eligible; base due dates 1 Feb 2024–31 Jan 2027
PND.3
Withholding — individuals (PND.3)
By the 7th of the following month
RD online +8 days if eligible; base due dates 1 Feb 2024–31 Jan 2027
PND.53
Withholding — companies (PND.53)
By the 7th of the following month
RD online +8 days if eligible; base due dates 1 Feb 2024–31 Jan 2027
PND.54
Withholding — non-residents (PND.54)
By the 7th of the following month
RD online +8 days if eligible; base due dates 1 Feb 2024–31 Jan 2027
SSO
Social Security contributions
By the 15th of the following month
Check the agency deadline; no RD extension applies
We are a DBD-registered Thai accounting firm handling monthly and annual bookkeeping, every category of tax filing, payroll with social security, company registration, audit coordination, with separately agreed auditor responsibilities. We serve Thai and foreign-owned companies nationwide through an online document workflow, with monthly fees quoted per engagement.
Need a scope assessment? Describe the accounting or tax issue, relevant periods and due dates so the checks, required records and responsibilities can be clarified before a meeting.
Discuss your scopeProof of registration
Before you hand financial records to anyone, you should be able to verify who they are. This is our actual registration certificate, with a number you can check straight against the DBD register.
As noted on the certificate, the company was formerly Notary and Apostille Translation Interpreters (NAATI) Co., Ltd. and changed to its current name on 6 August 2026 — the operating history runs unbroken from 2021.
Verify who we are
Handing over your books means handing over every financial detail you have. Before you decide, you should know the counterparty legally exists and who signs off the work.
DBD registered
0435564000249
CPA Partner audit engaged separately
Fed. of Accounting Professions
Filed via RD e-Filing
Revenue Department
We file with and answer to these authorities
We do not display client logos — confidentiality covers that — but we can arrange a reference call with an existing client in your industry where they agree.
Industry playbooks
Each vertical carries a different tax profile: service charge and food cost for restaurants, platform fees and e-Service VAT for e-commerce, promoted-income segregation for BOI companies.
Urgent problem?
Changing Accountants: Checking the Handover
Agree a cut-off date and file inventory before transferring responsibility.
Back Tax Filings: Separate Periods Before Calculating
An unfiled return and an amendment require different checks.
Revenue Notice: Check the Request and Attendance Date
Distinguish an information request, summons and assessment notice.
Backlog and Inactive Accounts: Verify Before Closing
No revenue does not mean no transactions or liabilities.
Penalties and Surcharge: Verify the Basis First
Check the tax, error and payment evidence separately.
New Company: Organise Records and Separate Duties
Filing obligations follow actual activities, not incorporation alone.
SME Accounting Quotes: Separate Monthly, Closing and Audit Work
Compare scope and handover records, not just totals.
Choosing an Accounting Firm: Verify Responsibility and Scope
Entity registration is not a CPA licence or quality certification.
Accounting and Tax Calendar: Forms, Periods and Channels
The DBD filing date is not the PND 50 deadline.
Coverage
Send documents three ways: upload to our cloud workspace, post by EMS, or drop them at the nearest office. All filings go through RD e-Filing and the online SSO portal, so service is not tied to where our desks sit.
Thai accounting knowledge base
The question bank, articles, guides and glossary are open to everyone. Each page cites the Revenue Code, Revenue Department notifications, financial reporting standards and the relevant statutes.
Topic index
Every accounting and tax topic, grouped into clusters you can browse end to end.
Situation guides
Step-by-step walkthroughs for real tasks: VAT registration, year-end closing, switching firms.
Bilingual glossary
Thai–English accounting and tax terms with sourced definitions.
Search everything
One box across FAQs, articles, guides and glossary terms.
Authors & reviewers
Who writes and who reviews our content, with verifiable credentials.
Offices & maps
Addresses, opening hours and the government offices near each branch.
In-depth accounting and tax articles
Articles cite the relevant statutes and notices. They are general information, not a substitute for case-specific advice from our staff.
ภาษี / Tax
Prevent invalid input VAT, missed withholding, entertainment and private-expense errors, stock mismatches and unexplained deposits.
Practice area: Tax
18 min
ปิดงบ / Year-end close
Reconcile balances, prepare audit evidence, and separate AGM, DBD, shareholder-list and corporate-tax deadlines for a controlled year-end close.
Practice area: Accounting
18 min
Emergency / เร่งด่วน
Separate inquiry letters, statutory summonses and assessments; assemble evidence, reconcile returns and protect the 30-day appeal clock.
Practice area: Tax
18 min
Accounting & Tax Office
Thai Law & Accounting Services Co., Ltd. (tax ID 0435564000249) is a company registered with the Department of Business Development. Our head office is at 680/45 Na Mueang Road, Khon Kaen, with a Bangkok branch on Soi Lat Phrao 95. You can look up our registration yourself in DBD DataWarehouse.
Monthly books, withholding returns, PP.30 and payroll depend on your entity's status and transactions. The bookkeeper prepares financial statements; an independent CPA audits and gives an opinion, not a guarantee of perfect figures or immunity from tax review. PND.50 has a base deadline of 150 days after year-end; check filing-channel extensions separately when planning.
Legal disputes, litigation and notarial work are not handled here; we refer them to the legal team at tla.co.th so each matter sits with the right licensed professional.
Service illustration, not evidence of our premises or an actual engagement
Accounting service illustrations
These images are illustrations, not verified photographs of our staff, clients or offices. They accompany preparation topics and are not evidence of completed engagements.
Monthly bookkeeping team
Recording, reconciliation and monthly closing by your dedicated accountant.
Scoping and appointments
Describe the required work before arranging an appointment or online meeting.
Bilingual foreign desk
Senior accountants walk foreign shareholders through the statements and tax position, line by line.
Preparing the auditor's evidence
Statement preparation is distinct from the CPA's independent audit and opinion.
Checking filing evidence
Review returns, payments and acknowledgements separately within the agreed scope.
Discuss the work through LINE
Confirm document channels and language needs before the engagement.
Check the address before travelling
Find the Khon Kaen head office and Bangkok branch details on our contact page.
Agree how to hand over originals
Identify the document list, sender and recipient before handover.
Pre-closing review huddle
Bookkeeping, tax and review staff walk the numbers together before you approve.
Today's highlights
Explore accounting, tax and preparation topics relevant to your business.
Accounting & Tax Firm
We are not check-the-box bookkeepers. We are accountants and tax specialists who believe accounting should help you make better decisions — from monthly closing and VAT/withholding management, through owner-and-company tax planning, to CFO-level budgeting, cash flow, and executive KPIs.
Journals, ledgers, trial balance, and monthly closing under TFRS for NPAEs (SMEs) or full TFRS (PCL) — delivered on cloud accounting platforms (Xero, PEAK, FlowAccount, Express) with real-time executive access and analytical reports that support real business decisions.
VAT (P.P.30) and withholding tax (P.N.D. 1, 3, 53, 54) filings, monthly VAT reconciliation, and e-Tax Invoice / e-Receipt integration with the Revenue Department — cutting audit exposure and penalty risk.
PND 50 (annual) and PND 51 (semi-annual) for companies, plus PND 90/91/94 for individuals — with strategic tax planning that aligns owner and company positions and maximizes BOI, SME, R&D, and foreign tax credit entitlements.
Full-stack payroll — tax, social security, provident fund, and workmen's compensation — with digital e-payslips, PND 1 / SSO 1-10 / KT 20K filings, annual 50-Bis certificates, and audit support with the Social Security Office.
A limited company's financial statements must be examined by an independent Certified Public Accountant under the auditing standards adopted by TFAC. We prepare the trial balance, working papers and supporting records, then coordinate with an auditor engaged under a separate scope, so the bookkeeper and the auditor are never the same person.
Chart-of-accounts design, document workflow, approval flows, inventory setup, and integration with your existing ERP / POS — plus an Outsourced CFO service delivering budgeting, forecasting, cash-flow projections, KPI dashboards, and monthly executive reviews.
Cross-border tax coverage — 60+ Double Tax Agreements (DTA), OECD/BEPS-aligned Transfer Pricing documentation, Revenue Department rulings, tax-efficient holding structures, and foreign-source income reporting under Thailand's updated rules.
Business plans for financing, fundraising, or exit; company valuations; feasibility studies; investor decks and financial models; and coordination between owners, banks, and venture capital.
Want a dedicated CPA who owns your monthly close and tax? We tailor a package to your company size right away.
Why Choose Us
Owners worry about missed deadlines and creeping fees, so we put every step in writing.
We quote from your actual document volume and headcount, in writing, before any work begins.
Advance reminders for PND.1/3/53, PP.30 and social security, with filing receipts sent back every month.
Tax ID 0435564000249 is searchable in DBD DataWarehouse; financial statements are signed by a licensed auditor.
Monthly summaries in Thai and English for foreign directors and shareholders.
How We Work
Every client receives a written Scope of Work and quotation covering steps, timeline, and fees before we start. No unannounced billing, ever.
01 · Listen
Share your business type, accounting period, VAT status and backlog so we can identify the records needed before an appointment.
02 · Design
Separate bookkeeping, tax and auditor coordination, with inclusions, exclusions, fees and timing conditions based on available records.
03 · Execute
Reconcile entries to source records, identify gaps and obtain approval before filing. Agree communication channels and update intervals in the scope.
04 · Sustain
Hand over agreed deliverables and filing or payment evidence. Ongoing monthly support and additional work need their own defined scope.
Industries We Serve
Accounting & Tax Scope
We do not publish fee figures. Document volume, headcount and tax complexity differ enormously between businesses, so tell our team about yours and receive a quotation matched to the real work.
Monthly Retainer
Fee
Quoted on your real workload
Our team reviews document count, headcount and VAT status, then issues a quotation before any work starts. Billed month-to-month with no lock-in.
Guidance on VAT filing in line with Revenue Department requirements
Prepare & file employee withholding tax (PND.1)
PND.1 = monthly employer withholding on staff salaries.
Prepare & file withholding tax on individuals (PND.3) and companies (PND.53)
Withholding at source on rent, services, ads, etc. — remitted to the Revenue Dept.
Prepare & file monthly Social Security contributions
Prepare monthly Input VAT and Output VAT reports
Prepare & file monthly VAT return (PP.30)
Unlimited tax consultation throughout the year — no extra charge
All filings submitted through the Revenue Department's e-Filing system
Annual Filings
Year-end closing, the mid-year estimate and the DBD submission are quoted by company size and transaction complexity, with the licensed CPA's audit fee stated in the same quotation.
File mid-year corporate income tax return (PND.51)
Filed in August, based on the first-half profit estimate.
File year-end corporate income tax return (PND.50)
Prepare & submit financial statements to the DBD (S.BorChor.3)
File annual employee withholding return (PND.1 Kor)
Year-end closing: trial balance, financial statements, bank reconciliations, fixed-asset register
Register as your official bookkeeper with the Federation of Accounting Professions
How we quote
We ask only for what is needed to scope accurately, and you never send sensitive records before deciding.
Step 1
Reach us on LINE, by phone or email with the basics: what the business does, monthly document volume, headcount and VAT status.
Step 2
Our bookkeepers review the real data, list the monthly and annual work plus any backlog, then confirm the scope with you first.
Step 3
You receive a quotation stating the scope, the billing cycle and the government fees billed at cost separately — nothing hidden.
Monthly document volume: purchase and sales tax invoices, receipts, payment vouchers
Whether you are VAT-registered, and whether you import or export
Headcount inside payroll and the social-security system
Industry and special standards: inventory, construction projects, or investment-promoted operations
The state of prior periods: any unclosed years or outstanding filings
The reports management or the parent company needs, and the language required
Add-ons & Terms
Representation at the Revenue Department when a summons or invitation letter is issued
On-site coaching and training for your internal accounting team
AGM notice and filing of the shareholder list (BorJor.5) with the DBD
The AGM must approve the accounts within 4 months of year-end (CCC s.1171); failing to hold it carries a fine of up to THB 20,000 under the 1956 Partnerships and Companies Offences Act.
Loan-application packs, special reviews and any work outside the monthly scope
Government fees, stamp duty and third-party charges are always billed at cost, separately from the professional fee.
Switching from another firm?
Company affidavit, BorJor.5, VAT registrations (PP.01/09/20), Revenue Dept. & Social Security logins, prior-year financials, trial balance, fixed-asset register, AR/AP detail, inventory, PND.1/3/53/50/51, PP.30, and bank statements — we request each item ourselves so nothing slips through.
Book a handover callFrequently Asked
We do not publish service fees online because each engagement differs by document volume, headcount, VAT status and add-on work. Share these details with our team by LINE, phone or email to receive a written quotation before work begins. Government fees, such as registration charges, are listed separately at official rates.
This site focuses on accounting and tax. Litigation, contracts, and legal advisory are handled by our affiliated law firm at tla.co.th — we can refer you directly.
Yes. Our English-speaking desk handles accounting, tax, payroll and the official filings foreign-owned companies need — BOI, Treaty of Amity, visa and work permit paperwork. Legal work, property transactions and legal due diligence are referred to our affiliated law firm at tla.co.th.
Late document submission incurs an additional fee based on actual work; we always provide an estimate before proceeding.
We operate 4 offices: Khon Kaen (head office), Bangkok, Udon Thani, and Nong Khai, serving clients nationwide.
Tell us your accounting period, VAT status and required work without sharing passwords or OTPs. We assess documents, scope and fees before the engagement starts.
Thai Desk
Each page sets out scope, required documents, the real working sequence and common situations, written natively in Thai. Fees are quoted per case after reviewing your document volume.
Request a quote: LINE @THAIL · Call centre 064-2894888 · Contact@thailaw-accounting.co.th