How Korean Rental Income Reporting Works for Foreign Landlords

If you own a flat in Korea and rent it out, or you're thinking about it, the income is taxable and the reporting rules are specific. Rental income in Korea is generally reported in your annual comprehensive income tax return each May, and some landlords must also register as a rental business. Missing these steps can mean penalties that outweigh the rent you collected.

This is general information, not tax advice. Confirm current rules with a tax accountant.

The Quick Answer: What You Report

Landlords generally report rental income on the annual income tax return filed through Hometax, as covered in the Hometax guide. The tax is based on your rental income minus allowed expenses, or on a standard expense ratio in some cases. How much you owe depends on the number of homes you own, the rent, and your other income.

Who Is Treated Differently

Rules vary by situation:

• One-home owners may be exempt from tax on rental income of a standard home below a certain value, with conditions.
• Owners of several homes are generally taxed on their rental income, including monthly rent and, in some cases, a calculated interest-equivalent on large deposits (간주임대료).
• Foreign residents and non-residents may be subject to different withholding or filing rules, depending on tax residency status.

The deposit rule surprises many owners. For jeonse-style deposits above certain thresholds, the tax authority may treat part of the deposit as deemed income even if no monthly rent is paid.

Registration and Contracts

Some landlords must register as rental businesses, particularly if they own multiple units or want certain tax benefits. Registration brings obligations around rent increase limits and contract terms, so weigh the benefits against the restrictions before choosing it.

Your lease agreement should be registered with a confirmed date (확정일자), as covered in the deposit protection guide, and keep records of rent received.

Documents to Keep

1. Lease contracts and deposit records
2. Rent payment records, preferably via bank transfer
3. Receipts for repairs and maintenance
4. Property tax and insurance payments
5. Mortgage interest statements, if relevant

Foreign Landlord Points

• Confirm whether you are a Korean tax resident or non-resident, since filing and withholding differ
• If you live abroad, a tax agent in Korea can file for you
• Check how your home country taxes the same income, because double taxation relief may apply

Common Mistakes

• Not reporting cash rent. Records show up in other data.
• Ignoring deemed deposit income. It can create a tax bill without rent.
• Missing the May deadline. Late filing brings penalties.
• Not keeping expense receipts. Deductions need documents.
• Assuming a single home is always exempt. Conditions apply.

Quick Summary

• Rental income is generally reported in the annual income tax return filed in May through Hometax.
• Multi-home owners, large deposits, and tax residency status can change how much tax applies.
• Register your lease with a confirmed date and keep contracts, rent records, and expense receipts.
• Foreign landlords should confirm residency status, consider a Korean tax agent, and check home-country tax rules.