Korean tax guides made simple

File on time and 3% comes off; fail to file and 20% goes on — twenty-three percentage points on the same tax.

“Ten years” appears twice in the gift tax. Same number, opposite ways of counting people — which is where most of the confusion lives.

Almost every write-up says “here is what changes from 2027.” But this goes to the National Assembly on 3 September. One axis runs through all of it — not how long you held the home, but how long you lived in it.

“A 20% financial-asset deduction” only holds between ₩100M and ₩1B — the provision actually has four bands.

Paragraphs (1) and (2) each say “separately, 100m won,” which reads as 200m. Paragraph (3) then caps the sum at 100m.

The medical credit is not one rate but three, fertility treatment is 30%, and the two age tests are measured from opposite ends of the year.

Comprehensive real estate tax runs 1-15 December; property tax takes land in September, buildings in July, and splits only housing. Under ₩200,000 it is settled in July alone — and the car tax prepayment ceiling is 10%, not 5%.

A notice from the tax office does not stop the five years running — the provision says so in as many words.

The 104 million won line is not in the Act — VAT Act art.61 sets only a band from 80 million to 130% of it, delegating the figure to the Decree.

We opened Framework Act on National Taxes art.45-2 — and found two three-month clocks running alongside the five years.

We opened the provisions themselves. The 3.3% turns out to be 3% x 1.1, and the 8.8% takes three provisions multiplied together.

We ran each income combination through Income Tax Act art.73 — including the clause that catches a second job paying wages.

The familiar 10% discount is out of date: the 2026 rate is 5%, and it covers only the months after you pay — September gives 1.25%.

1.5M won each. The 1M-won income and age rules, plus avoiding sibling double-claims — with cases.

Cash for working households: 1.65M–3.3M won plus up to 1M won per child, filed in May.

We recomputed the tax office's published worked example and matched it to the won. Plus what really counts toward the 15-million-won pension line.

We ran the National Tax Service's own formula. Filling the 25% threshold with a credit card is worth exactly zero in tax.

‘I'm in the 24% bracket so I pay 24%’ — wrong, and the myth costs people money.

South Dakota says seven. The trackers say eight. Search says nine. Here's why the count differs — and what SALT does to the math.