What Is Mid-Year Tax Filing? Understanding Form P.N.D.94 & Who Needs to File

Many people believe that filing taxes once a year is enough. In reality, if you earn a regular salary alongside side income—such as from freelancing, online selling, side gigs, or running a business—and earn over 60,000 THB (for single individuals) or 120,000 THB (for married individuals), you are required to file Form P.N.D.94.

Please note that income evaluated for P.N.D.94 includes categories under Section 40(5)–(8), not regular salary under Section 40(1). Failing to file if you meet the criteria could result in fines, interest, or unexpected back-tax issues.

Today, we'll walk you through what mid-year tax is, who needs to file P.N.D.94, and smart tax planning tips to help ease your payment burden with peace of mind.

What is mid-year tax, and why do you need to file Form P.N.D.94?

Mid-year tax filing refers to submitting personal income tax returns for income earned during the first six months of the year (January–June) using Form P.N.D.94. This system allows taxpayers to calculate and pay tax on their first-half earnings ahead of time, before reconciling their total annual income during the regular year-end tax season.

This process is designed specifically for independent earners and individuals whose income isn't subject to regular monthly tax withholding like salaried employees. Paying in two stages helps prevent the financial strain of facing a massive lump-sum tax bill at the end of the year.

What Is Form P.N.D.94 and Who Needs to File It?

Form P.N.D.94 is the mid-year personal income tax return form for individuals earning assessable income under Section 40(5)–(8) of the Revenue Code, which includes sales/commerce, freelancing, licensed independent professions, construction/contracting, broker commissions, private business profits, rental income, and e-commerce.

Common professions that typically require mid-year tax filing include Content Creators, YouTubers, TikTok Creators, Online Sellers, Influencers, Shop Owners, Freelance Graphic Designers, Photographers, and Freelance Writers.

How Does Mid-Year Tax Differ from Annual Tax?

Mid-year tax is not an extra tax—it is simply an advance tax payment. The amount you pay now will be credited against your total tax liability when you file your full-year taxes at year-end.

Who is required to file mid-year tax?

The deciding factor is your type of income, not your job title or business structure. If you earn income under Section 40(5)–(8) exceeding 60,000 THB (for single individuals) or 120,000 THB (for married individuals) during the first half of the year, you are required to file Form P.N.D.94.

1. Freelancers and Independent Workers

Graphic design, content writing, video editing, photography, web development, and product reviews rarely come with standard monthly tax withholding like corporate payroll. If your income reaches the required threshold, you must file Form P.N.D.94 regardless of whether you have formal payslips.

2. Online Sellers and Content Creators

Revenue Department compliance tracking covers earnings from Shopee, Lazada, TikTok Shop, Affiliate marketing commissions, YouTube ad revenue, Facebook Creator payouts, and TikTok live-stream sales under Section 40(8).

3. Salaried Employees with Side Income

If you work a regular full-time job (Section 40(1)) but also earn qualifying side income—such as e-commerce selling, freelance projects, sales commissions, or rental income—and that specific side earnings under Section 40(5)–(8) exceeds statutory limits in the first half of the year, you must file Form P.N.D.94 for those side revenue streams.

What happens if you don't file mid-year tax?

Many people assume, "I'll just report everything at the end of the year." However, if you meet the requirements for Form P.N.D.94 and fail to submit it, statutory penalties apply under Revenue Department regulations:

• Late Filing Criminal Fine: Up to 2,000 THB for failing to submit the return within the legal timeframe.
• Monthly Surcharge: 1.5% per month calculated on the unpaid tax balance (fractions of a month count as a full month).
• Retroactive Audit Risk: Interconnected digital platforms and bank transaction reporting allow authorities to easily trace historical income.

What is the difference between P.N.D.90 and P.N.D.94?

Form P.N.D.94 is the mid-year tax return for Section 40(5)–(8) income earned between January and June, filed between July and September of the same year as an advance partial payment.

Form P.N.D.90 is the annual tax return summarizing total earnings across all categories (Section 40(1)–(8)) for the entire year (January to December), filed between January and March of the following year. Taxes paid in advance via Form P.N.D.94 serve as a **tax credit that offsets your total year-end liability**.

Smart mid-year tax planning tips to save your wallet

Initiating your tax planning mid-year allows you to maximize tax deductions and manage your personal cash flow effectively.

1. Claim Half-Year Deductions Wisely

When filing Form P.N.D.94, half of annual standard personal deductions (50%) can be applied (30,000 THB). You can also utilize eligible payments made during the first half of the year—such as Life Insurance (up to 100,000 THB limit), Health Insurance (up to 25,000 THB limit), RMF, Thai ESG funds, or residential mortgage interest—to lower your mid-year tax bill.

2. Keep Personal and Business Finances Separate

Maintain distinct personal and business bank accounts, track monthly earnings and expenditures, and retain all receipts and proof of business expenses to make mid-year tax calculations accurate and seamless.