Rental Yield Analysis — Monthly vs Jeonse Conversion Rates and Net Return Calculations by Seoul District

A practical guide to calculating real estate rental yields in Korea. Compares monthly rent and jeonse (전세) returns with net yield calculations after taxes and management costs, by major Seoul neighborhoods.

Summary

Gross rental yield in Seoul typically ranges from 2% to 4% for apartment properties.
Net yield after tax, vacancy, and management costs is typically 30% to 40% lower than the gross figure.
The jeonse-to-monthly-rent conversion rate (전월세 전환율) directly determines which rental structure offers better returns for landlords.

What Is Rental Yield?
Monthly Rent vs Jeonse: Which Is Better for Landlords?
The Jeonse-to-Monthly-Rent Conversion Rate Explained
Gross vs Net Yield: What Gets Deducted
Rental Yield by Seoul District
Practical Yield Calculation Examples

What Is Rental Yield? {#section1}

Definition

Rental yield is the annual income generated by a rental property expressed as a percentage of its purchase price. It is the primary metric landlords use to assess a property's income-generating potential relative to the capital invested.

Gross vs Net Yield

Gross yield is calculated without deducting costs:

Gross Yield = (Annual Rent Income ÷ Property Purchase Price) × 100

Net yield deducts all costs:

Net Yield = ((Annual Rent Income − Costs) ÷ Property Purchase Price) × 100

The difference between gross and net yield is typically significant — often 1% to 1.5 percentage points lower for net yield due to taxes, maintenance, and vacancy.

Monthly Rent vs Jeonse: Which Is Better for Landlords? {#section2}

Monthly Rent (월세) Advantages

Monthly rent provides regular cash flow and is immediately useful for landlords who need income to service a mortgage. It also eliminates the risk of having a large sum tied up in a tenant deposit.

Jeonse (전세) Advantages

Jeonse involves receiving a large lump-sum deposit (typically 60% to 80% of property value) with no monthly rent. Landlords can invest this deposit and earn returns — in effect, the tenant 'pays' in the form of the opportunity cost of the deposit amount. Jeonse is advantageous when investment returns exceed the jeonse conversion rate.

The Jeonse-to-Monthly-Rent Conversion Rate Explained {#section3}

What Is the Conversion Rate?

The jeonse-to-monthly-rent conversion rate (전월세 전환율) is the implied interest rate that equates the jeonse deposit to an equivalent monthly rent stream. It is defined by regulation and updated periodically by the government.

As of 2026, the statutory conversion rate for most regions is 5.5% annually (computed as the Bank of Korea base rate + 2%).

How to Use the Conversion Rate

If a property has a jeonse value of 500M KRW, the equivalent monthly rent is:

500,000,000 × 5.5% ÷ 12 = approximately 2,291,000 KRW per month

This is the rate at which landlords should be indifferent between jeonse and monthly rent structures. If the landlord can earn more than 5.5% by investing the jeonse deposit elsewhere, jeonse is preferable. If less, monthly rent is better.

Gross vs Net Yield: What Gets Deducted {#section4}

Major Cost Categories

The difference between gross and net yield comes from:

Cost Item	Typical Annual Amount
Rental income tax (임대소득세)	14% to 25% of rental income
Property tax (재산세)	0.1% to 0.4% of assessed value
Management fee / maintenance	0.3% to 0.5% of property value
Vacancy allowance	5% to 8% of annual rent
Insurance	0.05% to 0.1% of property value

After accounting for these deductions, a property with a 4% gross yield may yield only 2.5% to 3% net.

Rental Yield by Seoul District {#section5}

Gross Yield Estimates by Area (2026 Approximate)

District	Representative Area	Gross Yield
Gangnam (강남구)	Daechi-dong	1.5% – 2.0%
Mapo (마포구)	Hapjeong / Mangwon	2.5% – 3.0%
Seongdong (성동구)	Haengdang / Wangsimni	2.5% – 3.2%
Dongdaemun (동대문구)	Dapsimni / Janghanpyeong	3.0% – 4.0%
Nowon (노원구)	Sanggye-dong	3.5% – 4.5%
Dobong (도봉구)	Changdong / Ssangmun	4.0% – 5.0%

Note: Higher yield areas tend to have lower capital appreciation potential. The inverse relationship between price appreciation and rental yield is a well-documented pattern in Seoul's property market.

Practical Yield Calculation Examples {#section6}

Example 1: Apartment in Mapo (800M KRW, Monthly Rent 2M KRW)

Annual rent income: 24,000,000 KRW
Gross yield: 24M ÷ 800M = 3.0%
Costs (tax 14% + management + vacancy): approximately 7,500,000 KRW
Net yield: (24M − 7.5M) ÷ 800M = 2.1%

Example 2: Apartment in Gangnam (2B KRW, Jeonse 1.5B KRW)

Annual equivalent rent income (1.5B × 5.5%): 82,500,000 KRW
Gross yield: 82.5M ÷ 2B = 4.1% (on jeonse basis)
But if landlord invests jeonse at 4%: return = 60,000,000 KRW
Net comparison: jeonse investment yield may be lower than monthly rent in low-rate environments

Example 3: Studio in Nowon (300M KRW, Monthly Rent 900K KRW)

Annual rent income: 10,800,000 KRW
Gross yield: 10.8M ÷ 300M = 3.6%
After costs: approximately 7,500,000 KRW net
Net yield: 2.5%

Expert Summary

Seoul gross rental yields range from under 2% in Gangnam to over 4% in outer districts.
Net yield is typically 1% to 1.5% lower than gross after taxes, maintenance, and vacancy.
The jeonse conversion rate (currently 5.5%) is the break-even point for choosing between jeonse and monthly rent.
Higher-yield districts tend to offer lower price appreciation — yield and growth potential are inversely correlated in Seoul.
For tax planning, consult a tax accountant as rental income taxation changed significantly in 2019 and subsequent years.

Conclusion

Understanding rental yield — both gross and net — is essential for making sound real estate investment decisions in Korea. Use the Real Estate Tax Calculator to model your investment scenario, and compare current district yield benchmarks before committing capital.

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Frequently Asked Questions (FAQ)

Q. What is a good net rental yield for Seoul apartments? A. A net yield of 2% to 3% is typical for Seoul apartments. Properties with net yields above 3.5% usually carry higher risk factors such as lower liquidity or aging buildings.

Q. Is jeonse or monthly rent better for landlords in 2026? A. With jeonse conversion rates at 5.5% and deposit investment options typically below that level, monthly rent has become more attractive for many landlords compared to 5 to 10 years ago.

Q. How is rental income taxed in Korea? A. Rental income below 20M KRW annually can be taxed at a flat 14% rate (분리과세). Above 20M KRW, it is added to comprehensive income and taxed at progressive rates up to 45%.

Q. Do I need to register my rental property with the government? A. Landlords with annual rental income above 20M KRW are required to register with the National Tax Service. Voluntary registration for smaller amounts qualifies for certain tax benefits.

Q. What is the typical vacancy rate for Seoul apartments? A. Vacancy rates vary significantly by district and property type. For well-located apartments near subway stations, vacancy is typically under 3%. Outlying areas may experience 5% to 10% vacancy.