Claim all your hidden money with Samjeomssam, not just your May tax refunds!
From comprehensive income tax to medical expense refunds, the Hometown Love Donation System, telecommunication subsidies, and app-based money-making strategies,
we will find every single penny you missed out on simply because you didn't know about it.
● What is Samjeomssam?
- We provide comprehensive income tax filing assistance services so you can claim your hidden refunds.
- Samjeomssam's partner tax accountants assist business owners with their regular comprehensive income tax filings.
Samjeomssam focuses on creating lasting value for customers in terms of tax savings, so we aggregate all income and additional deduction items for filing. It is a service that allows anyone to handle difficult and complex tax filing easily, quickly, and conveniently.
● What features does Samjeomssam offer?
- We share ‘Jjeom, Money-Making Stories,’ covering everything from tax tips to questions about Samjeomssam.
- Check your income and tax history for the past 5 years with the ‘Income Certificate.’ - With 'Medical Expense Refund,' anyone with indemnity medical insurance can receive a refund for their medical expenses.
- Start your day with 'Daily Missions' in the Benefits tab. You can use points to purchase gift certificates.
In addition to easy tax filing assistance, Samjeomssam provides personalized financial and tax-saving information useful for daily life. Download the Samjeomssam app now to utilize the various additional features available only through the app. We will help you apply what you learn immediately to your real life!
● Is Samjeomssam a trustworthy place?
Samjeomssam is a service operated by Jarvis & Villains Co., Ltd., a tax tech company established in 2015. It is Korea's leading tax filing and refund assistance service, chosen by 24 million cumulative subscribers.
Minimum personal information is collected for service usage, is encrypted and securely stored in accordance with relevant laws, and is immediately destroyed once the necessary purpose has been achieved. The 3o3 system protects your information through a thorough and secure security management system. Having received official recognition for its safety and reliability, it has obtained the Information Security Management System (ISMS) certification administered by the Korea Internet & Security Agency (KISA).
● Do you have any inquiries?
Please leave an inquiry via the ‘Customer Center’ in the app or the KakaoTalk Plus Friend ‘3o3 Customer Center’.
● 3o3 Official Sites & SNS
Website : https://www.3o3.co.kr/
YouTube : https://bit.ly/3HiR8iF
Instagram : https://www.instagram.com/3o3_official/
Blog : https://blog.naver.com/jobisnv
※ Notice regarding feature restrictions during maintenance
Some functions, such as checking your initial refund, may not work if you sign up during the Hometax maintenance hours (daily 00:00–09:00). You can continue from where you left off by using the app again after the maintenance period.
※ Service Permission Access Guide
[Essential Access Permissions]
- Search Installed Apps: Detecting malicious apps to prevent personal information leakage incidents
* You cannot use Samjeomssam if a malicious app is installed.
[Optional Access Permissions]
- Camera: Using the service, such as taking photos/videos necessary for consultations, photographing ID cards for medical expense refunds, and capturing palm lines to provide event benefits
- Storage: Attaching photos and files stored on the device
- Notifications: Receiving notifications necessary for service use
- Physical Activity (Motion & Fitness): Recording physical activities such as pedometers
* You can change access permissions in the OS Settings app, and you can use Samjeomssam even if you do not agree to the optional access permissions.
- How to revoke optional access permissions: Settings > View All Apps > Samjeomssam > App Permissions > Allow/Disallow Access Permission Item
※ 288,635 KRW is the average application amount per person based on the total refund applications of 7,208,747 cumulative reporting customers during the period from May 1, 2020 to April 1, 2026. ※ 414,000 KRW is the average refund amount for 155,658 cumulative applicants from July 2025 to February 2026.
※ As of May 1, 2020 to April 1, 2026, the number of eligible customers is 13,965,129, representing 71% of the 19,518,109 people who inquired about their refunds.
※ The existence of a refund and the estimated refund amount may vary depending on individual conditions (personal details, eligibility for deduction items, and applicability, etc.).