Corporate Tax
What is PND 50?
A summary of crucial steps and what new business owners must not miss in annual filings.
Chiang Mai Accounting Firm · For SMEs & Individuals
The Accounting Firm
Empowering Your Business Growth
More than just bookkeeping and tax filing.
Our Senior Accountants & CFO Advisors
help you plan taxes and structure finances.
Serving corporations, freelancers, and online sellers.
Senior Accountants
10+ Years Experience
Business Analysis
Beyond Bookkeeping
Financial Prep
Boost Opportunities
One-Stop Service
All Solutions in One Place
We Have You Covered, Whoever You Are
Choose the service that fits your profile for clear, transparent pricing and details.
Business Owners / Corporations
Corporate accounting, year-end closing, tax planning, and financial prep for business expansion and funding. We handle the Revenue Department for you.
- Monthly Bookkeeping · Year-End Closing
- Corporate Tax Planning · CFO Advisory
- Financial Statements for Loans (Loan Ready)
Individuals / Freelancers / Online Sellers
Personal income tax filing, deduction planning, and tax management for multiple income streams. Easy document submission via LINE.
- Personal Tax Filing (PND 90/91)
- Freelance Tax Planning · Multiple Incomes
- E-commerce Tax (Shopee, TikTok, Lazada)
Common Problems Clients Face Before Finding Us
Whether you're a business owner or an individual, we listen and solve every concern.
For SME Owners
For Individuals / Freelancers / Online Sellers
Our Belief
“Behind every good business
is a great accountant.”
Behind every steadily growing SME is more than just accurate bookkeeping. It's an accounting team that understands numbers, plans taxes, and empowers owners to make confident decisions.
Why Choose Us
More than bookkeeping; it's about risk prevention and sustainable growth.
01
Senior Accountants
Close accounting risk gaps. Audited by highly experienced accountants (10+ years) ensuring accuracy and peace of mind against retroactive checks.
02
Tax Planning Specialists
Proactive tax shields. We plan and maximize tax privileges to protect your profits and save costs legally.
03
Loan Readiness Experts
Prepare for financial stability. We upgrade your financial statements to international standards, increasing access to funding and growth.
35%
Average Legitimate
Tax Savings
Tax Savings
100%
Passed Audits
by CPAs
by CPAs
15+ Years Experience
Serving Northern Thailand SMEs
Our Core Expertise
Accounting, Tax Planning & CFO Advisory Services
Corporate Accounting
Monthly bookkeeping, VAT, and withholding tax filings. Accurate, auditable, and always on time.
Corporate Tax Planning
Design legal corporate tax structures, reduce Revenue Department risks, and save costs.
CFO Advisory
Analyze numbers, cash flow, and costs to help owners make data-driven decisions, not guesses.
Loan Readiness
Prepare financial statements and documents for bank evaluations, boosting credit credibility.
Other Services:
Exclusive Highlight
Ensuring Your Business is Financially Ready
for Opportunities & Expansion Funding
We find that many SMEs run great operations but lack liquidity because their financials don't meet bank scoring criteria. Our team audits and structures your documents proactively to elevate your business's credibility.
01
In-Depth Financial Analysis
Check Financial Ratios and scan for weaknesses that need immediate attention.
02
Audit and Fortify
Refine data and bank statements to ensure logical consistency and international standards.
03
Complete Document Prep
Manage and systematically prepare all necessary supporting documents for business evaluations.
04
Future-Proof Accounting Structure
Build a back-office system that supports long-term positive credit ratings to boost competitiveness.
Experts in Northern Thailand's Business Structures
Every industry has unique tax contexts and costs. We have specialized, ready-to-use accounting templates.
Comprehensive Coverage Across the North
Deeply understanding local economic contexts, not just changing province names.
500+
SMEs & Corps Trust Us
15+
Years Experience
100%
Certified Public Accountants
DBD Certified Quality
Client Success Case Studies
Proven real-world results from entrepreneurs in Chiang Mai.
Real Voices from Our Clients
Over 80% of our new clients come from referrals.
Digital First
Send Documents Easily via LINE
No need to travel or organize messy folders. Just snap a photo of your bills and send them via LINE. Our team handles the rest, complete with a Client Portal for real-time data tracking.
Snap and Send
Send receipts/tax invoices via LINE. We record them for you.
Automated Sales Data
Auto-sync data from Shopee, TikTok, and Lazada.
Quick Replies in Hours
Chat directly with partners without long wait times.
Transparent Pricing
Clear Prices, No Hidden Add-ons
We state our service fees clearly from the start. No hidden costs. You always know the price before making a decision.
Personal Tax Filing
Ideal for Salary Earners/Freelancers
Starting from
฿3,000
Monthly SME Accounting
Bookkeeping · Taxes · Social Security
Starting from
฿4,000/mo.
* Actual prices adjust based on document volume and business type. Always notified clearly before work begins.
Accounting & Tax Knowledge Hub for SMEs
Stay updated on the latest Revenue Department laws and financial management techniques.
Business Finance
Understanding Financial Statements
Learn to read the 3 main statements to analyze break-even points and profit trends.
Finance
Preparing for SME Evaluations
A checklist of documents and how to manage data to make your corporate profile credible.
Entrepreneur Guide
How to Choose an Accounting Firm
5 key criteria for selecting an accounting partner who won't abandon the job and actually saves you taxes.
Frequently Asked Questions (FAQ)
Clearing up all doubts regarding accounting services and tax preparation.
Q:How much is the monthly accounting service?
Service fees start based on document volume and business type. For average SMEs, it starts at approximately 4,000 - 5,000 THB/month, covering bookkeeping, tax filings, and social security submissions.
Q:Can I change accounting firms mid-year? Is it complicated?
You can change anytime and it’s not complicated at all. The SiamAccount team has a system to coordinate database transfers and clear pending documents from your previous firm for free, ensuring seamless continuity.
Q:What documents are needed to start the service?
Each month, simply prepare sales/purchase documents, invoices, receipts, bank statements, and withholding tax certificates (if any). Our team can arrange a pickup or you can submit them online at your convenience.
Q:How long does the annual financial statement closing take?
Normally, after receiving all complete documents by year-end, we will clear and close the financial statements within 30-45 days, allowing ample time for CPA audits before the Ministry of Commerce and Revenue Department deadlines.
Q:Does SiamAccount help prepare businesses for funding applications?
Yes, we do. We analyze your existing financial structure and organize data to meet financial institution scoring criteria, pointing out flaws and preparing documents to maximize your business's credibility.
Q:Where is your accounting firm located? Do you have a physical office?
We are a legally registered company with our headquarters and team based in the Old Town zone of Chiang Mai. You are welcome to come in for a consultation, or we can schedule a meeting at your company.
Q:Do you handle BOI-registered companies or those with foreign shareholders?
Yes, we do. Our team has specialized expertise in BOI legal requirements and tax privileges, as well as the Department of Business Development regulations for entities with foreign shareholders.
Q:What are the benefits of Cloud Accounting?
It allows business owners to view Profit & Loss statements, outstanding balances, or issue receipts/invoices themselves via mobile or PC 24/7. Data syncs directly to our accountants, reducing paper and speeding up work.
Q:If audited by the Revenue Department, how will you assist?
We send our expert team to meet and clarify facts along with documentary evidence to Revenue officers on your behalf 100%, protecting your business's best interests legally.
Q:What does the Payroll service cover?
It covers salary calculations, commissions, overtime (OT), payslip generation, bank transfer file creation (Media), PND 1 filing, and monthly Social Security contribution submissions.
Q:As a freelancer or online seller, how do I file taxes?
Income from freelance work or online sales (Shopee/TikTok/Lazada) requires personal income tax filing. We consolidate sales from all platforms, calculate expenses, and plan deductions to ensure accurate and economical tax payments. Just send data via LINE.
Q:How much does personal tax filing cost?
Personal tax filing fees start at 3,000 THB, depending on the complexity and number of income streams. We always clarify the price before starting—no hidden fees.
Q:How do I submit documents? Is it convenient?
Very convenient. Just take photos of your bills or documents and send them via LINE. No need to travel or organize folders. Our team handles the entry and management, providing a system for you to view data anytime.