Maximum Amount Mortgage (Geun-jeodang)

Imagine lending $100 to a friend and holding their watch as collateral. Once they pay it off, the collateral agreement ends. If they borrow again next week and you have to draft a brand-new collateral contract every single time, it gets exhausting.

An ordinary mortgage attaches strictly to a single, specific debt: once that loan is fully paid off, the mortgage automatically vanishes, and a new one must be registered if money is borrowed again. In contrast, a maximum amount mortgage functions like a pre-approved credit line. The lender and borrower agree on a generous ceiling, and any fluctuating balance or future loans within that boundary remain protected under the very same priority rank. Even if the loan balance briefly drops to zero, the mortgage does not disappear.

Banks in South Korea almost always set up this type of mortgage for home loans. It neatly protects not only the principal, but also accumulating interest, late penalties, and future borrowings under the same roof, all within that single ceiling.

When you pull a Korean property register (*deunggibungbon*), you will often see a number 10% to 30% higher than the cash actually borrowed—commercial banks usually set it at 110% to 120%, while secondary lenders go higher. If someone borrows 100 million won and 120 million won appears on the register, that reflects a 120% setting. This number is called the maximum claim amount (*chaegwon choegoyaek*).

Lenders must protect themselves if a borrower falls behind on payments. Foreclosing on a home and auctioning it off in court can take anywhere from several months to over a year. During that drawn-out process, overdue interest steadily piles up. The bank bakes that future backlog into the recorded limit upfront.

Importantly, seeing 120 million won on the title registry does not mean the homeowner currently owes 120 million won. What they actually owe is their remaining principal and current interest. However, for anyone else looking at the title, that registered ceiling serves as a clear safety boundary: "Up to 120 million won from this home belongs to our bank first."

If you rent a home in South Korea, you are told to immediately inspect Section B (*Eul-gu*, covering non-ownership rights) on the property registry. A mortgage listed there is essentially a queue number for getting repaid if things go wrong.

If the landlord defaults and the property is auctioned off, the court distributes the proceeds strictly according to who grabbed their queue number first. For a tenant, moving in and submitting a moving-in report gives you legal power against third parties (*daehangryeok*) starting at midnight the next day, and getting a fixed date stamp (*hwakjeong-ilja*) grants the right to preferential repayment (*useon-byeonjegwon*). Only if all of these dates precede the mortgage's registration date can you get paid before the bank; if the mortgage is registered on the same day as your moving-in report, the bank takes precedence. Renting a place that already carries a mortgage means assuming the bank gets paid before you.

Therefore, the baseline safety check is whether the property value minus the registered maximum claim amount comfortably covers your deposit. In a court auction, homes often sell below market value, and prior tenant deposits or delinquent taxes may take a cut first. Looking into deposit guarantee insurance (*jeonse bojeung boheom*) is also wise. Even if the landlord insists "there is barely any loan balance left," the bank can claim delinquent fees or re-borrowed funds up to that limit under its original rank as long as the mortgage remains active. Even when fully paid off, if it has not been officially cancelled, the lien still stands. Always calculate your risk based on the maximum registered ceiling, not casual promises.