Korea Rental Income Tax 2026 — Separate vs Comprehensive Taxation, 20M Won Threshold and May Filing Guide

TL;DR Korea taxes residential rental income at a flat 14% (15.4% with local surcharge) under separate taxation when annual rental revenue is at or below ₩20 million; one won above that triggers comprehensive taxation (6–45% progressive). Combining registered-landlord status, joint-name distribution between spouses, and the 60% deemed-expense rate can lower the burden by 30–50%. The May 31 filing deadline carries a 20% non-filing penalty plus 0.022%/day late-payment interest.

How is Korean rental income tax calculated?

Korean rental income tax applies to rent received from residential or commercial property (monthly rent + deemed rental income from deposits). For residential rentals, the tax regime changes completely at the ₩20 million annual revenue threshold. Below that line, landlords may choose between separate taxation at a flat 14% or comprehensive taxation; one won above the line forces comprehensive taxation, blending the rental income with all other income at the 6–45% progressive rate.

→ Run a precise simulation in seconds with our Korean Real Estate Tax Calculator.

Separate 14% vs comprehensive progressive — which wins?

Choice is only available when annual rental revenue stays at or below ₩20 million; the deciding variable is the size of your other income (salary, business, interest, dividend). Full-time landlords with little other income usually win with comprehensive taxation, while high-salary employees almost always win with separate taxation. The same rental revenue can produce a 3–10× tax-burden difference depending on household income structure.

Separate 14% taxation (15.4% incl. local) — flat and simple

• Rental revenue × 50% deemed expense (60% if registered)
• Extra base deduction: ₩4M registered, ₩2M unregistered
• Taxable base × 14% flat — never combined with other income
• No progressive tax exposure → favorable for high earners

Comprehensive progressive — 6–45%

• Rental income added to salary, business, interest, dividend
• Progressive rates (6 / 15 / 24 / 35 / 38 / 40 / 42 / 45%) after deductions
• Pre-paid taxes credited against final liability
• Effective rate can drop below separate when other income is low

→ The system does not auto-compare; you must simulate each May before filing.

Registered landlord benefits — 4-year and 8-year regimes

Becoming a registered landlord requires registration at the tax office (income tax sole-proprietor) and the local government (rental property registration) — both. Registration raises the deemed-expense ratio from 50% to 60% and doubles the separate-taxation base deduction from ₩2M to ₩4M. That alone yields ₩300K–₩800K in annual savings on most portfolios.

💡 Practical note: Registered status comes with a 5%-cap rent-increase rule and an 8-year mandatory rental period for the long regime. If you plan to sell within 2–3 years, skip registration; if you are a long-hold multi-home owner, the combined separate / comprehensive / capital-gains savings make registration overwhelmingly worth it. See also: Korean Capital Gains Tax 2026 — One-Household Exemption Strategies

Five practical tax-saving strategies (May filing checklist)

1) Distribute names between spouses — each gets a separate ₩20M cap

If all rental properties sit under one spouse's name, that one person hits the ₩20M ceiling fast. Splitting names 50:50 or fully distributing gives each spouse a separate ceiling, allowing combined ₩40M household revenue under separate taxation. Run the gift-tax simulation first — the ₩600M cumulative spousal exemption (10-year window) must not be breached.

2) Deemed rental income from deposits — kicks in at 3 properties

Owners of 3+ homes face deemed rental income on the portion of pooled deposits exceeding ₩300M, computed by multiplying by the standard time-deposit rate (~2.9% in 2026). Even a leveraged jeonse-stack investor must include this in May filing using (deposit total − ₩300M) × 2.9% × 60% × 90%.

3) Registered status for long-hold owners — triple savings stack

Registering for the 8-year (junggonggong) regime stacks 70% long-term capital-gains special deduction + comprehensive property tax exclusion + 60% deemed rental expense. The 5%-cap rent rule and 8-year minimum are the only catches; if you can comply, the math always favors registration. Early termination triggers clawback of all received tax benefits.

4) Itemized expense filing — when actuals exceed 50/60% deemed

If actual expenses (repairs, vacancy losses, brokerage, property tax, rental insurance) exceed 50% (or 60% registered) of revenue, switch to itemized expense filing. Receipts, tax invoices, and contracts must be kept for 5 years; sloppy mid-year record-keeping makes May reconciliation nearly impossible.

5) Installment payment — split into two when liability exceeds ₩10M

Regardless of separate or comprehensive choice, when assessed tax exceeds ₩10M you may pay half by May 31 and the rest by July 31 via the installment checkbox on the filing form. Essential cash-flow option for multi-home owners. Related: Korean Salary Take-Home Calculator

May filing — 30-minute Hometax flow

1. 1Gather records: rent transfer logs (bank statements), deposit contracts, repair / brokerage receipts, full-year rental revenue summary
2. 2Compute deemed rental income: if 3+ homes, pre-calculate (deposit total − ₩300M) × 2.9% × 90%
3. 3File on Hometax: Comprehensive Income Tax → Rental Income section → choose separate or comprehensive → auto-calc
4. 4Review and decide installment: tick the installment box if assessed tax exceeds ₩10M
5. 5Pay: card (0.8% fee), bank transfer, or virtual account — settle before midnight May 31
6. 6Local income tax: file separately on Wetax by June 30 (10% of national tax)

⚠️ Warning: Missing May 31 by even one day triggers a 20% non-filing penalty and 0.022%/day late-payment interest. On ₩50M unfiled revenue, that is roughly ₩3.5M extra — settle by midnight on the 31st.

Frequently Asked Questions

Q1. Do single-home owners owe rental income tax?

A: Owners of one home with assessed value ≤ ₩1.2B are exempt. Single-home owners of high-value (>₩1.2B) properties or rental of overseas-located homes are taxable.

Q2. Is rental income tax owed when only deposits (jeonse) are received?

A: Owners of two or fewer homes are not taxed on jeonse deposits. With 3+ homes, the portion of pooled deposits over ₩300M generates deemed rental income that must be added to revenue.

Q3. Can the choice between separate and comprehensive change yearly?

A: Yes — pick whichever is more favorable each May. Once filed under one method, that year's choice is locked, so simulate carefully.

Q4. Is landlord registration mandatory to rent property?

A: No. But unregistered landlords face a 0.2% non-registration surcharge on revenue and lose the higher deemed-expense and base deduction benefits. For 4+ year holds, registration almost always wins.

Q5. Are officetel (studio) rentals treated as residential?

A: Residential officetels are classified as housing for income tax purposes; commercial officetels are business leasing and require separate 10% VAT filings. The contract's stated use is the deciding factor.

Q6. Can vacancy-driven losses generate refunds?

A: Yes — under comprehensive taxation, rental losses offset other income (salary, business). Separate taxation does not allow loss offsets, so heavy-vacancy years generally favor comprehensive election.

Q7. How are non-resident landlords taxed on Korean rentals?

A: Non-residents owe Korean income tax on Korean-sourced rental income. Tenants typically withhold 22% at payment and remit it; the landlord then claims a foreign tax credit in their home jurisdiction under the relevant treaty.

Related reading

• Korean Capital Gains Tax 2026 — One-Household Exemption Strategies
• Korean Comprehensive Real Estate Tax 2026 — ₩1.2B Single-Home Deduction & Multi-Home Surcharge
• Rental Yield Analysis 2026 — Monthly vs Jeonse Conversion and Regional Net Yield
• Korean Comprehensive Income Tax 2026 — Freelancer & YouTuber Tax-Saving Playbook
• Korean Dividend Income Tax 2026 — Korea & US Stocks Filing Guide

Closing — rental tax planning starts at acquisition, not at filing

Rental tax savings begin at the moment you choose how to title the property, whether to register as a landlord, and how strictly you cap rent increases at 5% — not in May. Of the five strategies above, joint-name distribution, registered-landlord status, and yearly separate-versus-comprehensive simulation apply to almost every Korean landlord. Lock these into your annual calendar by the end of April and your May filing collapses into a 30-minute Hometax session.

⚠️ This article is general information; optimal tax planning depends on each landlord's specific portfolio (number of homes, assessed value, registration status, household income mix). For sizeable filings, consult a Korean licensed tax accountant.