Starting a new company in 2026: how to prepare so tax becomes easy
For entrepreneurs planning to start a new company in 2026, beginning the business in full compliance with tax law is the most important first step, to reduce the risk of penalties and surcharges and to build a stable foundation for the business. If you are in Chiang Mai province or the surrounding area, advice from a specialist in accounting services in Chiang Mai lets you focus on growing the business without worry.
Why filing tax correctly matters for a business that has just started
Many people see tax as complicated, but understanding your obligations from the moment you start a new company is the best risk management strategy. Tax is not just a burden to be paid; it is evidence of the business's transparency, which financial institutions and trading partners use to judge its credibility.
In addition, planning tax from the outset lets you make full use of the available tax benefits. If you want an adviser who understands the local business context, you can use a professional tax planning service right away, to prevent back-tax problems that can arise from not knowing the law.
Tax preparation steps after starting a new company
Once your company registration is complete, the next step is to notify the Revenue Department of your status. The key points are:
- VAT registration: If revenue is expected to exceed 1.8 million baht per year, you must register for VAT within 30 days of the date revenue passes that threshold
- Applying for a taxpayer identification number: For a juristic person (company), the juristic person registration number is the same as the taxpayer identification number
- Keeping daily accounts and tax reports: Income and expenses should be recorded systematically from day one, so that each month's tax filing is accurate
If you are looking for a quality team to take care of these document systems, choosing a firm that specialises in accounting services in Chiang Mai greatly reduces errors in data entry and filing.
Starting a new company and the 2026 tax calendar you need to know
To keep the business running smoothly, here is a summary of the tax obligations you must meet in each accounting period:
- Withholding tax (P.N.D.3, P.N.D.53): File by the 7th of the following month (or the 15th if filed online)
- VAT (P.P.30): File by the 15th of the following month (or the 23rd if filed online)
- Half-year corporate income tax (P.N.D.51): File within 2 months of the last day of the first 6 months of the accounting period
- Year-end corporate income tax (P.N.D.50): File within 150 days of the end of the accounting period
For entrepreneurs who have just started a new company, make sure you check these deadlines carefully. If you want peace of mind, using a specialist in accounting services in Chiang Mai ensures you always receive correct and up-to-date advice. You can find more information in all our articles.
Common mistakes for first-time business owners
The most common mistake is "mixing personal money with company money", along with neglecting to keep important documents such as purchase and sales tax invoices, which usually leads to tax errors when it is time to close the books. Submitting documents late and incurring monthly fines is also a real pity and seriously erodes the business's profit.
Frequently asked questions (FAQ)
Does a new company have to file tax every month?
If your company is registered for VAT, or makes payments that are subject to withholding tax, you must file tax returns every month, even in months with no income.
Do I need a dedicated accountant from the first day the company opens?
Although the law does not require it, having an accountant or accounting firm looking after things from the founding stage prevents problems with incomplete documents and bookkeeping that does not follow the rules, which benefits the business as a whole in the long run.
What documents are needed to register a company?
In general, you need copies of the shareholders' ID cards, the company's objectives and the office address. If you want it done quickly and correctly, a company registration service with a specialist greatly reduces the processing time.
Summary and how to contact us
Starting a new company in 2026 is an exciting step. Getting your tax affairs ready from day one helps you grow on a stable footing. If you want professionals who understand tax law and are ready to support your business in Chiang Mai, the YMTD team is happy to look after you end to end, from tax planning to monthly bookkeeping.
Contact YMTD Accounting Partner, Chiang Mai, for an initial consultation right away!
Tel: 081-542-3019 / LINE: @ymtd
