Losing Your Rights = Missing Your Chance! Tax Deduction 2025: What will Happens if you don’t File Your Taxes Completely?

Everyone with income must pay personal income tax. But what many people, especially beginners, often overlook is the right to claim tax deductions. Many assume that whatever tax is calculated is what they must pay. In reality, you are entitled to deduct certain expenses before calculating your tax. If you don’t use this right, you could end up paying more tax than you actually should.

This article will show you what happens if you don’t use tax deduction benefits or miss some claims, and what you should watch out for.

If the article is too long, you can choose a topic to read

• What will happen if you don’t use tax deductions?
• Missing out on deductions = A missed opportunity
• Tax deductions people often overlook
  

What will happen if you don’t use tax deductions?

Many people may think that not using tax deductions just means paying tax as usual. But in reality, skipping your 2025 tax deductions means you’re paying extra money unnecessarily — because these benefits are designed to ease the burden for all income earners.

• Paying full tax

Your entire income will be taxed without any deductions. The higher your income, the more you pay — even though you could have reduced your tax bill.

• Missing the chance to keep money in your pocket

Money that could have been saved or spent is instead lost to income tax, leaving you at a disadvantage compared to those who fully claim their deductions.

• Paying more than you should

Compare two people with the same income: one claims tax deductions, the other doesn’t. The one who skips them ends up paying higher taxes immediately, even though both earn the same.

Missing out on deductions = A missed opportunity

Some people don’t exactly “skip” their rights, but end up not claiming them fully — maybe they forget to submit documents, or don’t even know they’re entitled to them. For example, buying health insurance but not using it for a tax deduction means that benefit disappears instantly.

• Bought insurance or invested in a fund but forgot to claim → money wasted.
• No certificate from the insurer or fund → can’t claim the benefit.
• Forgetting to claim small deductions that add up, like child allowance, parents’ health insurance premiums, or eligible purchases and travel expenses, means losing extra savings.

An “incomplete filing” is no less detrimental than “not claiming” deductions, as it results in paying personal 

Tax deductions people often overlook

Even though the law allows you to claim many types of deductions, there are still several tax benefits that people often “forget” or don’t realize exist — especially beginners.

• Life insurance premium: deductible up to 100,000 Baht.
• Personal health insurance premium: deductible up to 25,000 Baht.
• Parents’ health insurance premium: deductible up to 15,000 Baht.
• Annuity insurance premium: deductible up to 300,000 Baht.
  RMF / SSF funds: deductible according to regulations.
• Mortgage interest: deductible up to 100,000 Baht.
• Child allowance: a basic entitlement, but many forget to file it.

Knowing these entitlements will help you make full use of your rights and not miss the chance to save on tax.

Tax deductions aren’t too complicated for beginners — they’re your right to pay less tax and keep more savings. If you don’t use your entitlements or forget to file them, you’ll end up paying more than you should right away.

Tax planning not only helps you this year but also gives extra benefits, such as protection from tax-deductible insurance and future savings through deductible funds.

For more information: 

☑️ Call Tel. 1766, available 24/7.

☑️ Contact a life insurance agent, KASIKORNBANK or Land and Houses Bank branches nationwide.

-Underwriting is subject to the Company’s rules.

-Conditions are as specified by the Company’s and the banks.

-Premium is eligible for tax deduction. Conditions are as specified by the Revenue Department.

-    Please study the details of coverage, conditions, and exclusions before making a decision to purchase insurance.