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Top 5 Common Mistakes When Filling Income Tax

This article will provide you with valuable insights and tips to ensure that your tax filings are accurate and complete.

April 14, 2023

It is the time of the year again where we have to file our income tax. If you have not done so, please remember to do so by 18 April 2023.

Filing income tax correctly in Singapore is crucial to avoid penalties and fines. Unfortunately, many people make mistakes when filing their taxes, which can result in additional taxes owed or even legal action. To help you avoid these pitfalls, I have compiled a list of the top five common mistakes to avoid when filing income tax in Singapore. Whether you are filing taxes for the first time or you are an experienced taxpayer, this article will provide you with valuable insights and tips to ensure that your tax filings are accurate and complete.


Mistake 1: Failing To Report All Income

One of the most common mistakes people make when filing their income tax returns in Singapore is failing to report all income. It is important to note that all income earned in Singapore and overseas must be reported on tax returns, including income from rental properties, part-time work, and freelance jobs. Failure to report all income can result in penalties and potential legal action.

For example, if you fail to report rental income earned from a property you own, you could be subject to fines and penalties. The same goes for income earned from part-time or freelance work. These types of income may not seem significant, but they must be reported on tax returns in Singapore.

It is also worth noting that if you have earned income overseas, you must report it on your tax returns in Singapore. While you may have paid taxes on that income in another country, you still need to report it in Singapore. Failure to do so can result in penalties and fines.

It is essential to report all income, regardless of the source, on your income tax returns in Singapore. Failing to do so can result in severe consequences, including fines and potential legal action.


Mistake 2: Misunderstanding Tax Reliefs And Deductions

Another common mistake people make when filing their income tax returns in Singapore is misunderstanding tax reliefs and deductions. Tax reliefs and deductions are essential components of the Singaporean tax system and can help to lower tax liabilities and reduce the amount of tax owed. However, failing to understand these tax incentives can lead to errors and mistakes on tax returns.

It is important to understand the different tax reliefs and deductions available in Singapore and how they can be applied to your income tax returns. Some common tax reliefs and deductions include the Earned Income Relief, which reduces the amount of tax owed based on income level, and the Parent Relief, which provides tax relief for parents supporting their children.

However, it is important to note that claiming incorrect tax reliefs or deductions can result in penalties and fines. For example, if you incorrectly claim a tax relief or deduction that you are not eligible for, you may be subject to additional taxes owed and fines.

To avoid this mistake, it is crucial to understand the various tax reliefs and deductions available and to consult a tax professional if you have any doubts about your eligibility. By doing so, you can maximize your tax savings and avoid costly errors on your income tax returns in Singapore.


Mistake 3: Incorrectly Filling Out Tax Forms

Filling out tax forms correctly is critical when filing income tax in Singapore. Unfortunately, it is also one of the most common mistakes people make when filing their taxes. Incorrectly filling out tax forms can lead to errors on your tax return, which may result in additional taxes owed and penalties.

One of the most common errors when filling out tax forms is miscalculating income. It is important to double-check all calculations when filling out tax forms, including income earned and deductions claimed. Failing to do so can result in penalties and fines.

Another common error when filling out tax forms is entering incorrect personal information. This may include your name, identification number, or address. These errors can result in delays in processing your tax return and may also lead to penalties and fines.

It is important to note that penalties for incorrectly filling out tax forms can be severe, including additional taxes owed and fines. To avoid these penalties, it is essential to take the time to carefully fill out all tax forms and to double-check all information entered. If you are unsure about any aspect of your tax return, it is best to consult a tax professional who can help ensure that your tax forms are filled out correctly.

Filling out tax forms correctly is crucial when filing income tax in Singapore. By avoiding common errors and taking the time to carefully fill out tax forms, you can ensure that your tax return is accurate and complete, avoiding penalties and fines.


Mistake 4: Failing To Keep Accurate Records

Keeping accurate records is crucial for filing taxes correctly in Singapore. The Singaporean tax system requires taxpayers to keep detailed records of their income and expenses, as these records are used to calculate taxes owed and to support claims for tax deductions and reliefs.

Some examples of the types of records that people should keep include receipts, invoices, bank statements, and contracts. These records should include detailed information about the transaction, such as the date, the amount, and the nature of the transaction. Keeping these records can help to ensure that you are claiming all eligible tax deductions and reliefs and can help to avoid errors on your tax return.

Failing to keep accurate records can result in penalties and potential legal action. For example, if you are audited by the Inland Revenue Authority of Singapore (IRAS) and are unable to provide accurate records to support your tax return, you may be subject to fines and additional taxes owed.

To avoid this mistake, it is important to keep accurate and detailed records of all income and expenses throughout the year. This will help to ensure that you are able to accurately calculate your taxes owed and to claim all eligible tax deductions and reliefs.

Keeping accurate records is essential for filing taxes correctly in Singapore. By keeping detailed records of all income and expenses, you can avoid errors on your tax return and ensure that you are claiming all eligible tax deductions and reliefs. Failing to keep accurate records can result in penalties and legal action, so it is important to take this aspect of tax filing seriously.


Mistake 5: Missing Tax Deadlines

Missing tax deadlines can have serious consequences when filing income tax in Singapore. It is important to be aware of important tax deadlines and to ensure that you file your taxes and pay any taxes owed on time to avoid penalties and fines.

Some important tax deadlines to keep in mind include the deadline for filing income tax returns and the deadline for paying taxes owed. Once again for you to take note, the deadline for filing your income tax this year is 18 April 2023. It is essential to be aware of these deadlines and to ensure that you file your taxes and pay any taxes owed before these deadlines to avoid penalties and fines.

Penalties for missing tax deadlines in Singapore can be severe. For example, failing to file income tax returns on time can result in a fine of up to $1,000, with an additional $100 fine for each day that the return is late, up to a maximum of $1,000. Failing to pay taxes owed on time can result in a penalty of up to 5% of the unpaid tax amount, with an additional penalty of 1% per month for each month that the tax remains unpaid.

To avoid these penalties, it is crucial to be aware of important tax deadlines and to ensure that you file your taxes and pay any taxes owed on time. If you are unable to meet these deadlines, it is best to contact the Inland Revenue Authority of Singapore (IRAS) to discuss your options and to avoid penalties and fines.

Mssing tax deadlines can result in severe penalties and fines when filing income tax in Singapore. By being aware of important tax deadlines and ensuring that you file your taxes and pay any taxes owed on time, you can avoid these penalties and ensure that your tax filings are accurate and complete.


Filing income tax in Singapore can be a complex process, and it is easy to make mistakes. However, by being aware of the most common mistakes, you can ensure that your tax filings are accurate and complete, minimizing tax liabilities and avoiding penalties.

To avoid these mistakes, it is important to take the time to understand the Singaporean tax system and to seek professional help if you are unsure about any aspect of filing income tax in Singapore. By doing so, you can ensure that your tax filings are accurate and complete, avoiding costly mistakes and potential legal action.

Filing income tax in Singapore requires attention to detail and a thorough understanding of the tax system. By avoiding the most common mistakes and seeking professional help when necessary, you can ensure that your tax filings are accurate, complete, and free of errors and penalties.


Junwen Chen

My mission is to educate and empower people to design their lives so that they can live in abundance.

Let me partner with you, to design and nurture your dreams and ultimate life goals.


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