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Tax Deductions: How to Report and Claim Refunds via the “All-Fill” System

If you’re a taxpayer seeking to maximize your tax deductions and potentially receive refunds, understanding the “All-Fill” system for reporting income tax is essential. This guide will walk you through the steps of how to effectively use this system, who is eligible, and what you need to know before filing your taxes.

Who Should Use the “All-Fill” System?

The “All-Fill” system is designed for individuals who have various types of income, including:

Business Income: This includes income subject to a 3.3% withholding tax.
Wage Income: Earnings from employment.
Pension Income: This includes public and private pensions.
Miscellaneous Income: This can include occasional earnings, such as speaking fees.

Note: If your private pension income exceeds 15 million KRW per year, you have the option to choose between combining this income with other income for taxation or opting for separate taxation at a rate of 15%.

Key Deadlines and Requirements

It’s crucial to file your income tax return by the deadline in May of the following year. Failure to do so will result in the inability to claim any tax refunds. Additionally, if your claimed refund exceeds what you have paid in, you may incur additional penalties such as excess refund penalties and late payment fees.

Understanding Tax Refund Eligibility

A tax refund occurs when the sum of taxes you have paid in advance (withholding tax and interim payments) exceeds your total tax liability for the reporting year. Here’s how it is calculated:

Withholding Tax: Employers deduct 3.3% from any payments made to you for business income, which includes individual freelancers and other service providers.
Interim Payments: Certain taxpayers are required to pay half of their prior year’s tax liability in advance.

For example, if a tutor earned 10 million KRW in 2025 and had 330,000 KRW withheld as tax, but their final tax liability was only 220,000 KRW, they would be eligible for a refund of 110,000 KRW.

Steps to Report and Claim Refunds

Access the National Tax Service (NTS) Website: Visit [NTS Official Website](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?mi=41095&cntntsId=239072).
Login: Use your identification method (Korean ID or electronic certificate).
Navigate to Tax Reporting: Select “Tax Reporting” followed by “Income Tax Reporting” and then choose “All-Fill/Standard Expense Reporting.”
Submit Your Information: Follow the prompts to report your income and any applicable deductions.
Review and Submit: Ensure all information is accurate before finalizing your submission.

Important Considerations

Check for Additional Deductions: Before submitting, make sure to review any other potential tax deductions you may qualify for, such as contributions to retirement funds or education costs.
Interim Tax Payments: Be aware that even if you are eligible for a refund on income taxes, you may still owe local income taxes if there were no prior payments made.

Checklist for Filing

Gather all income documentation (details of business, wages, pensions).
Calculate any potential deductions.
Confirm all withholding amounts with your employers or payment providers.
Access the NTS portal and complete your report.

Frequently Asked Questions

What happens if I miss the filing deadline?
You will lose the ability to claim a refund and may incur penalties.

How can I verify my tax refund status?
You can check your refund status through the NTS website or by calling their dedicated ARS line at 1544-9944.

Can I appeal if my refund is less than expected?
Yes, you can amend your tax filing if you believe there are discrepancies in your deductions.

Conclusion

Understanding the “All-Fill” system for tax reporting can significantly ease the burden of tax season and help ensure you maximize your potential refunds. Always stay updated on current tax laws and consider consulting with a tax professional if you have specific concerns.

For further information and official guidance, you can refer to the [NTS Official Website](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?mi=41095&cntntsId=239072).

Source: National Tax Service – [All-Fill Tax Reporting Guide](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?mi=41095&cntntsId=239072).
Date of Reference: Not specified.
Disclaimer: This is general information and should not be taken as legal or tax advice. Always consult with a licensed tax professional for specific inquiries.