When people first encounter how housing is rented in Korea, almost everyone pauses for a moment. In most countries you only need to understand wolse (monthly rent), but Korea also has jeonse, a system that exists almost nowhere else in the world. Today we'll walk through, from the very beginning, how jeonse and wolse differ, what the large deposit numbers actually feel like, and what terms like conversion rate and jeonse-to-price ratio really mean.
Jeonse and wolse in one sentence each
Wolse means you leave a relatively small deposit and pay a fixed amount of rent every month. Most rentals around the world work this way. A listing might read something like a deposit of 10 million won with monthly rent of 600,000 won. The deposit here is money the landlord holds during the lease and returns once you move out and leave the place in good order.
Jeonse means there is no monthly rent at all. Instead, you place a very large lump sum as a deposit at the start. This lump sum is often well over half the value of the home. While living there, the tenant pays zero monthly rent, and when the lease ends, the entire deposit is returned in full. The landlord, in effect, holds a large near-interest-free sum to deploy elsewhere during the lease term.
The scale of the deposit numbers
The thing that surprises newcomers most is the sheer size of the deposit. A wolse deposit is commonly in the millions to tens of millions of won, but a jeonse deposit jumps up by a whole order of magnitude. As of writing, jeonse deposits for Seoul apartments often run from several hundred million won to well over a billion. The mental shortcut is simple: imagine one or two extra zeros tacked on.
Let's compare with a concrete example. Suppose the same home offers two options.
Wolse option — deposit of 20 million won plus 1 million won per month
Jeonse option — deposit of 300 million won and zero monthly rent
Choose wolse and only 20 million won is tied up at first, but 12 million won leaves your pocket each year as rent and never comes back; over two years that's 24 million won gone. Choose jeonse and a large 300 million won is locked up, but nothing leaves your pocket monthly, and the full 300 million is returned after two years. Which is better depends on whether you can raise that lump sum, and what that money could earn if placed elsewhere.
The jeonse-to-wolse conversion rate, the bridge between two worlds
Jeonse and wolse look like completely separate systems, but they're actually linked by a single ratio: the jeonse-to-wolse conversion rate. This rate tells you what annual percentage of rent a chunk of jeonse deposit converts into.
Let's run our example backward. Imagine turning a 300-million-won jeonse home partly into wolse. If you reduce the deposit to 100 million won, the 200 million won you took out gets converted into monthly rent. At a conversion rate of 6 percent per year, 6 percent of 200 million is 12 million won a year, which divided by twelve is 1 million won a month. In other words, a deposit of 100 million won plus 1 million won monthly is roughly equal in value to a 300-million-won jeonse. The lower the rate, the less monthly rent the same deposit becomes; the higher the rate, the more.
Jeonse-to-price ratio, half-jeonse, and the gap
The jeonse-to-price ratio is the jeonse deposit divided by the home's sale price. If a home is worth 500 million won and the jeonse is 350 million, the ratio is 70 percent. A high ratio means the gap between the two is small, so only a little more on top of the deposit would buy the home outright. A low ratio means a wide gap between price and deposit.
That gap is literally where the term gap comes from. It's the sale price minus the jeonse deposit. In the example above, 500 million minus 350 million leaves a gap of 150 million won. The higher the jeonse-to-price ratio, the smaller the gap.
Half-jeonse blends the two. You put down a large deposit, but smaller than a full jeonse, and cover the reduced portion with a relatively modest monthly rent. A deposit of 200 million won plus 500,000 won a month would count as half-jeonse. It shows up often when a tenant can't quite raise a full jeonse lump sum, or when a landlord prefers some monthly cash coming in.
Why jeonse is uniquely Korean, and who it favors
Several forces shaped jeonse into a Korean fixture. In past eras when home prices rose quickly, it made sense for landlords to collect a large deposit and use it to acquire other assets, while tenants paid nothing monthly and so, with enough of a lump sum, felt their housing cost was almost nothing. Bank interest rates, home-price trends, and lending conditions interlocked to make the arrangement attractive to both sides.
Here is the cost logic in plain terms. For a tenant, wolse is a cost that leaves every month and never returns, whereas jeonse ties up a large sum but preserves the sum itself; the hidden cost is the interest that money could have earned in a deposit or elsewhere. For a landlord, wolse is steady monthly cash flow, while jeonse provides no immediate cash flow but the chance to put a large lump sum to work. In the end, jeonse versus wolse comes down to one choice: lock up a lump sum, or pay a cost each month.
This article is educational and is not a recommendation to buy, sell, or hold any asset; figures reflect public records at publish time. If you want to build a feel for these large deposit numbers, practicing by looking at real listings and estimating their prices turns out to help more than you'd expect.
