July is when residential property tax bills arrive. According to Newspim, the July property tax levied by the City of Seoul this month totals 2.6387 trillion KRW, with the residential portion up 15% from the prior year. The starting point for everything on that bill is a single date: the assessment reference date of June 1. Here is why that date is decisive, and how the bill's numbers are calculated from the publicly assessed value — all based on publicly available standards.
June 1 — One Day Determines an Entire Year's Tax
Property tax is levied on the person who de facto owns the property as of June 1 each year. As Seocho District Office's tax guide explains, the ownership determination on the assessment reference date uses the earlier of the registration date and the final payment date, and is not prorated by day. If final payment was made on May 31 and ownership transferred, the entire year's property tax is the new owner's burden; if the final payment date was June 2, the former owner who already sold still pays a full year.
This is why in sales practice, negotiating the final payment date in late May or early June is also a tax negotiation. The seller benefits from settling within May, and the buyer benefits from settling after June 1 has passed. This tax does not apply to jeonse or monthly rent tenants, but for parties to a transaction involving ownership transfer, a single date line in the contract can move hundreds of thousands of Korean won.
Property tax is not prorated by the day — whoever owns the property on June 1 pays for the entire year.
The Calculation Behind the Bill — From Assessed Value to Tax Amount
The calculation has three steps. First, the tax base is the publicly assessed value (gongsigageok) multiplied by the fair market value ratio (gongjeong-sijanggaek-biryul). The basic ratio for housing is 60%, but as Changwon Special City News summarizes, a lower ratio of 43–45% applies again this year for single-household, single-property owners (1-seadae 1-jutaek), varying by assessed value bracket. Next, the tax base is multiplied by progressive rates by bracket; for one-property owners with an assessed value of 900 million KRW or less, a special reduced rate that is 0.05 percentage points lower in each bracket also applies. Rates are applied progressively only to the excess within each bracket.
The single-property special ratio varies by assessed value bracket. For assessed values of 300 million KRW or less, the ratio is 43%; for 300–600 million KRW, 44%; above 600 million KRW, 45%. For multi-property owners and corporations, the basic 60% applies unchanged. Even with the same assessed value, the tax base itself differs based on the household's number of properties — the first thing to check when you receive the bill is not the rate, but this ratio.
| Tax Base Bracket | Standard Rate (%) | 1-Property Special Rate (%) |
|---|---|---|
| Up to 60 million KRW | 0.10 | 0.05 |
| 60 million ~ 150 million KRW | 0.15 | 0.10 |
| 150 million ~ 300 million KRW | 0.25 | 0.20 |
| Over 300 million KRW | 0.40 | 0.35 |
For example, for a single property with an assessed value of 300 million KRW: tax base = 300 million × 43% = 129 million KRW. Applying the special rate: 0.05% on the first 60 million KRW = 30,000 KRW; 0.1% on the remaining 69 million KRW = 69,000 KRW; base tax is approximately 99,000 KRW. The actual bill also adds an urban area levy (0.14% of the tax base) and local education tax (20% of the property tax), so the amount you feel is larger than the base tax alone. A tax burden cap also applies to prevent sharp increases, so in years when the assessed value rose sharply, the increase is capped at a set percentage over the prior year's tax.
July and September — The Split Payment Structure and This Year's Seoul Temperatures
The residential property tax is billed in two halves: half in July (the 16th–31st) and half in September (the 16th–30th). However, if the base tax is 200,000 KRW or less, the entire amount is billed in July at once. This means that for the 300 million KRW example above, where the base tax is under 200,000 KRW, receiving no September bill is normal.
This year's Seoul bills show a sharp divergence by district. According to YTN, Songpa-gu's property tax levy rose 20.3% from the prior year, the highest increase among Seoul's autonomous districts. Since assessed values are reflected in bills with a one-year lag, areas where home prices rose sharply last year are seeing the steepest increases in this July's bills. Compared with the city-wide 15% increase in the residential portion, the numbers show that even within Seoul, the trajectories of holding costs are diverging.
Payment channels include Wetax (nationwide) and Seoul City eTax as the primary options, with bank apps and mobile payment services also available. No separate payment fee is charged for paying local taxes by card, so combining it with an interest-free installment promotion can defer the cash outflow somewhat. For bills where the tax amount exceeds 2.5 million KRW, a split payment option exists to spread part of the amount over two additional months. As long as you act within the deadlines, there are more options than you might think.
Checklist for End-Users
- For upcoming transactions: whether the final payment date falls before or after June 1 — one day's difference shifts who bears a full year's burden. Reach clear agreement at the contract stage.
- Whether the tax base on the bill matches your assessed value × applicable ratio — if you are a single-property household but 60% has been applied, inquire with the relevant district office about a possible special rate omission.
- If the base tax is under 200,000 KRW, do not wait for a September bill — small amounts are billed in full in July by default.
- Observe the payment deadline (July 31) — missing the deadline incurs a surcharge. Setting up electronic billing or auto-pay on Wetax or eTax prevents any missed payments.
- The single-property determination is household-based — if another household member holds a property under their name, the special rate may not apply, so check household composition first.
References
- Newspim — Seoul's July Property Tax: 2.6387 Trillion KRW Levied, Residential Portion Up 15%
- YTN — July Property Tax Bills Have Arrived; Songpa-gu Up 20.3%
- Seocho District Office — Property Tax: Understanding the Tax
- Changwon Special City News — 2026 Property Tax Payment Period: Missing the Single-Property Special Rate Could Cost You More