Tax Deductions for H1: What Did Your Accountant Miss?

When estimating your full-year profit for the P.N.D. 51, ensuring you have captured all Deductible Expenses is vital for cash flow efficiency. Don't let your accountant leave money on the table.

Now is the ideal moment to audit, because the half-year return is built on a forecast: an expense missing from the first five months is missing from your estimate too.

 

Area 1: Training & Development

Under Thai Law, you can often claim a 200% deduction (double the actual cost) for the expenses related to sending Thai staff to government-certified training courses. If you did this in Q1 or Q2, ensure it is recorded at the 200% rate in your forecast.

 

Area 2: Research & Development (R&D)

If you have invested in new product development or process innovation, you may qualify for a 300% deduction on specific R&D salaries and materials. This is the single most powerful tax shield for tech and manufacturing firms.

 

Area 3: Asset Depreciation (Accelerated)

SMEs in Thailand can often use Accelerated Depreciation for machinery and computer equipment. Instead of a 5 or 20-year schedule, you can write off a larger portion in the first year. Ensure your H1 asset list is updated and the correct depreciation model is applied to your profit forecast.

 

Documentation to Prepare

Enhanced deductions are only as strong as the paperwork behind them. Before finalizing your figures, confirm each claim is supported: enrollment confirmations for certified training, project and payroll records for R&D work, and a current fixed-asset register listing purchase dates, costs, and the depreciation method applied.

 

Common Mistakes to Watch

Look for expenses recorded at face value when an enhanced rate applies, personal payments that were never re-invoiced to the company, and equipment purchases buried in a general expense account instead of the asset register. Each of these silently shrinks your deduction; a short monthly review with your accountant keeps the list from growing.

 

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Related Service: Accounting & Tax Compliance — Specialized tax auditing and deduction optimization.