Buying vs Renting in Korea: The Real Break-Even

The argument that ends most of these discussions is: rent disappears, mortgage principal becomes yours.

The second half is true. Principal repayment is not a cost — it reduces a liability and comes back when you sell.

The problem is what the argument leaves out on both sides. On the buying side: the equity you put in, the acquisition costs, the interest, the annual taxes, the upkeep, and what it will cost to sell. On the renting side: a jeonse deposit is not free merely because you get it back.

1. The two formulas

Total economic cost of buying:

C_buy = acquisition costs + Σ(interest + property taxes + upkeep + equity opportunity cost) + selling costs + expected capital gains tax − price appreciation

Total economic cost of renting:

C_rent = Σ(rent + deposit-loan interest + deposit equity opportunity cost) + leasing costs − rent tax credit

Two variables drive everything: g, the expected annual growth in the property’s price, and r, the expected return on the alternative use of the same money.

The property’s value after n years is Pₙ = P₀ × (1 + g)ⁿ — but the appreciation is not the gain. Acquisition, holding, financing and selling costs come out of it, and where the sale is taxable, capital gains tax comes out of the terminal value too.

Discount each year’s cash flows at r and find the first year where

NPV_buy(n) = NPV_rent(n)

That year is the break-even holding period.

2. The symmetry rule

₩500,000,000 in a jeonse deposit at a 4% alternative return costs ₩20,000,000 a year. ₩400,000,000 of equity in a purchase at the same 4% costs ₩16,000,000 a year. Both are real. Neither appears on a statement.

Most published comparisons charge the first and not the second.

3. Renting has a cost line that gets forgotten

The monthly rent tax credit reduces the cost of renting for an employee who qualifies, and it is routinely absent from these comparisons.

Where total salary is ₩55,000,000 or less the rate is 17%; above that up to ₩80,000,000 it is 15%. It applies to at most ₩10,000,000 of annual rent.

So the maximum is ₩1,700,000 or ₩1,500,000 a year. Two consequences follow.

It is a credit against tax payable, not a deduction from income — so its value does not rise with your marginal rate.

And because the rent base is capped, it stops growing above roughly ₩833,000 a month. On an expensive lease it behaves as a fixed annual amount rather than a percentage, which matters over a ten-year projection.

4. Wolse is not simply more expensive than jeonse

A monthly rent is visible cash leaving every month, which makes wolse feel strictly worse than jeonse. In cost terms it often is not.

The smaller deposit means less capital tied up — and that freed capital is earning r somewhere else. Whether wolse or jeonse is cheaper depends on the conversion between them, on r, and on whether the rent credit is available.

The comparison between those two specifically, including the conversion rate, is in jeonse vs wolse.

5. What the model does not capture

Liquidity. A home is a concentrated, illiquid asset. For someone who may change employer, city or country, the transaction cost of exiting is not a footnote — it is the point. Renting buys optionality; the model prices the cash flows but not the option.

Renewal risk. The tenant’s side of that trade is uncertainty about renewal terms and about the deposit itself.

Concentration. A purchase generally puts most of a household’s net worth into one asset in one city. That is a portfolio decision as much as a housing one, and g is not a market average — it is the growth of that specific property.

Borrowing capacity. DSR measures annual principal and interest on all household lending against income, so a mortgage is not simply LTV multiplied by the price. Stress DSR tightens it further. What you can actually borrow is a separate question, worked through in getting a mortgage in Korea as a foreigner.

6. The decision matrix

Read the transaction-cost row against the “suits” row. That pairing is the whole result: because Korean purchase costs are front-loaded and large, a short expected stay makes buying hard to justify almost regardless of what happens to prices.

7. So the question is not what prices will do

It is whether, over the number of years you actually expect to stay, the property’s return after all costs and taxes exceeds what the same equity would have earned elsewhere.

How sharply it turns on those two numbers is worth seeing once. On an ₩800,000,000 purchase with ₩400,000,000 of equity against a ₩500,000,000 jeonse, holding r at 4%: at 3% price growth buying breaks even in year five, at 3.5% in year three — and at 2% it never breaks even at all inside thirty years, because the transaction costs are never recovered.

That reframing does two useful things. It makes the answer personal rather than market-wide — two people looking at the same apartment can correctly reach opposite conclusions because one is staying three years and the other fifteen. And it makes the assumptions visible, so a disagreement becomes a disagreement about g and r rather than about property in general.

Put the purchase price, your equity, the loan and its rate, the expected holding period, acquisition costs, annual holding costs, expected selling costs, g, r and the deposit or rent into one cash flow table, and read the year the two lines cross.

The annual costs that go into the buying side of it are in what owning a Korean home costs every year, and the one-off transaction costs are in closing costs when buying property in Korea.

Buying versus renting is not a forecast. It is a capital allocation decision with a holding period attached.