How Mortgages Work in Korea: Limits, Rates, Liens and Timing

What a mortgage is

In Korea, a home-secured loan is one where you pledge a home as collateral. Along with the loan, the lender registers a collateral lien, known as a geunjeodang, on the property, giving it the right to recover the money by selling the home, for instance at auction, if you cannot repay. Because recovery is secure, rates are lower and limits higher than for credit loans, and the term can stretch to decades. There are two main uses: a purchase loan covering part of the price when buying, and a loan against a home you already own for living costs or other purposes. The two are often subject to different rules and limits. Because the amount is large and the term long, a 0.1 percentage point difference or the choice of repayment method changes total interest greatly, and changing course later costs money. Checking before signing matters far more than for other loans, especially since income and family circumstances may change over a contract lasting decades.

The limit must pass two gates

A mortgage limit is calculated separately on a collateral basis and an income basis, and the smaller one applies. The collateral basis is the home's collateral value times the applicable ratio, minus senior claims and the room deduction; the income basis is worked back from keeping annual repayments on all loans within the cap relative to income. The DSR and LTV guide explains both calculations. The lender's own review comes on top. Apartments have abundant price data, so their collateral value is fairly clear, while multi-unit, row and detached houses can be appraised lower than expected. The ratio also varies for the same home depending on whether the borrower already owns a home, is a first-time buyer, or is buying in a regulated area. Getting estimated limits from two or three banks before signing the purchase contract reduces the risk that your balance payment plan falls apart.

What the rate is linked to

A Korean mortgage rate is a benchmark plus a spread, minus preferential discounts. Variable rates are usually linked to COFIX, the cost-of-funds index, and you may be able to choose between versions calculated differently, such as one based on new lending and one based on outstanding balances. The new-lending version tends to track market rates quickly, while the balance-based version moves slowly. Hybrid loans and periodic loans that reset the rate at set intervals usually use medium-to-long-term bank bond yields as the benchmark. A hybrid fixed for the first few years turns variable when that period ends, while a periodic loan re-fixes at the prevailing rate each cycle. Whatever the type, check the product description for the benchmark, the reset interval, the spread and the conditions for discounts. Remember too that, because of stress DSR, the rate type you choose can even change your limit.

The lien and the maximum secured amount

When you take a mortgage in Korea, a lien is recorded in the property register. It states a maximum secured amount, which is not the principal but the most the lender can recover from the collateral, including overdue interest and costs, so it is set higher than the principal; the ratio differs by lender. This is also the figure tenants check if you later let the home on a jeonse basis, so a large maximum can make tenants harder to find. Repaying the loan does not remove the lien automatically. It disappears from the register only after a cancellation registration; lenders often handle this, but it is safest to obtain the register yourself after full repayment and confirm it has been cancelled. Some credit-line forms let you borrow again while keeping the lien, so when repaying in full, tell the lender clearly whether you want it cancelled or kept.

The room deduction and the insurance that replaces it

Korea's Housing Lease Protection Act gives tenants with deposits below a certain level a top-priority right to recover part of their deposit ahead of other creditors even if the home goes to auction. Since this reduces what the lender can recover, it deducts that amount, often by number of rooms, when setting the limit; this is commonly called the room deduction. It can apply in principle even if there are no tenants and you will live there yourself, and it can cut the limit by tens of millions of won more than expected. Some products avoid the deduction by having the lender take out guarantee insurance, commonly called mortgage credit insurance, and lending without it. Availability depends on the type of home, region and other loan terms, and rate or limit conditions may change. The deduction amounts are set by region and revised, so ask whether the deduction applies, and how much, when you consult.

Timing from contract to drawdown

A home purchase loan is usually applied for formally after signing the sale contract and drawn on the balance date. On that day the loan goes to the seller's account, and transfer of ownership and registration of the lien typically take place together. The catch is that document submission, appraisal, income checks and review take time between application and approval. Depending on the season and lender this can take several weeks, so setting the balance date too tight risks the loan not arriving in time, losing your down payment or defaulting on the balance. The safe sequence is to confirm the expected limit and rate in a preliminary consultation before signing, then apply immediately after. It is also worth discussing with the agent whether the contract can include a clause for the case where the loan is not approved. When policy changes shrink limits, the date of application can decide the outcome.

• Before the sale contract: confirm expected limit and rate with banks
• Right after signing: apply and submit documents
• Review period: appraisal, income check, approval
• Balance date: drawdown, ownership transfer, lien registration

Costs beyond the rate

The real cost of a mortgage is not set by the rate alone. Loan agreements carry stamp duty, levied on loans above a certain amount and usually shared between lender and borrower. The costs of registering the lien are currently borne mostly by lenders, but this can differ by product and conditions, so check. Products with a public guarantee may carry a separate guarantee fee. The cost people feel most is the early repayment fee: repaying principal ahead of time within a set period incurs a fee proportional to the amount repaid, usually shrinking as time passes. If you plan to sell or refinance within a few years, this fee may exceed the rate difference. The cards or automatic transfers you take on for discounts also need weighing for upkeep and duration. Adding up all costs and dividing by how long you will actually keep the loan reveals the real difference between products.

• Stamp duty: on loans above a set amount, usually shared
• Lien registration costs: check who pays for each product
• Guarantee fee: separate for publicly guaranteed products
• Early repayment fee: when repaying ahead within the set period

Common misunderstandings

Misunderstandings about mortgages usually start from treating home value and limit as the same thing. Even with an ample market price, the income test or room deduction can make the limit much smaller. Assuming that approval guarantees drawdown on the balance date is also risky: if your income or debts change, or the rules change, before drawdown, the terms can change, so avoid taking new loans or installments until then. The lowest headline rate is not always the cheapest either; adding the cost of keeping discounts, early repayment fees and guarantee fees can reorder the ranking. People also think the register becomes clean once the loan is repaid, but without a cancellation registration the lien stays on record. Most of these can be avoided by asking a few questions before signing. Do not settle for verbal answers; ask staff to point out the relevant items in the product description.

• Thinking an ample market price means an ample limit
• Thinking drawdown is guaranteed whatever you do after approval
• Thinking the lowest headline rate is the cheapest
• Thinking the lien disappears by itself after repayment

Checks before signing

Because a mortgage is tied to the home purchase schedule, keeping the order matters most. First calculate the income-based limit from your income and existing loans, then estimate the collateral-based limit for the home, reflecting the room deduction. Next, confirm you can cover the shortfall with your own funds, and only then sign the purchase contract. At consultation, decide the rate type and benchmark, repayment method and term, and check the monthly burden with a loan repayment calculator. Do not forget to recalculate assuming rates rise. Finally, check the product description for early repayment fees, discount conditions, the overdue rate and the maximum secured amount. Spending continues after the purchase, from acquisition tax to moving and repairs, so plan to keep an emergency fund apart from the loan. Reverse the order and sign for the home first, and few options remain if the limit falls short.

• 1. Calculate the income-based and collateral-based limits separately
• 2. Confirm you can cover the shortfall, then sign the purchase contract
• 3. Decide rate type, benchmark, repayment method and term
• 4. Recalculate monthly payments assuming rates rise
• 5. Check early repayment fees, discount conditions, overdue rate, maximum secured amount
• 6. Confirm an emergency fund remains after acquisition tax and moving costs

Situations people ask about most

First-time buyers may receive favourable collateral ratios or policy products, but the definition of a first-time buyer and the benefits are set by regulation and change often, so check the criteria at the time you apply. If you already own a home and are moving to a new one, the loan may come with a condition to sell the existing home within a deadline. Missing it can mean the loan is recalled or other penalties, so estimate the sale date of your current home conservatively. If falling rates have you considering refinancing, add up the remaining early repayment fee, the new loan's costs and whether the lien must be re-registered to calculate what you would actually save. The refinancing and early repayment fee guides cover the comparison in detail. Whatever the case, writing the drawdown date, sale deadline and fee-free date on a calendar reduces missed steps.

• First purchase: check the definition and benefits when applying
• Moving homes: be conservative about the sale condition and deadline
• Refinancing after rates fall: calculate savings net of fees and costs

Limits and disclaimer

This guide is a general explanation of how Korean mortgages are structured. It does not recommend any lender or product or judge whether an individual can borrow. Collateral ratios, income caps, stress rates, room deduction amounts, the details of stamp duty and early repayment fees, and benefits for first-time buyers change frequently with government policy and lender practice. Even for the same home, results vary greatly with the borrower's income, existing loans and number of homes owned. Products, terms and regulations differ by company and over time, so before signing, check the product description and terms and confirm the latest criteria with the Financial Services Commission, the Financial Supervisory Service, your bank and the Korea Housing Finance Corporation. The cost items described here do not apply identically to every product, so judge by your own contract. It is safest to set the amount by a repayment plan that survives rising rates, not by the limit.