Why check the tax before exchanging farmland in Korea
This calculator is based on Korean rules: the Income Tax Act, its Enforcement Decree and Enforcement Rule as in force in 2026.
When farmers swap paddies with a neighbor or exchange land because of a local government project, many assume there is no tax because little money changes hands.
Korean tax law, however, treats an exchange as a transfer just like a sale.
If the farmland exchange or consolidation exemption in Income Tax Act Article 89(1)2 is not met, capital gains tax and local income tax apply to the whole gain on the farmland you gave up.
The calculator checks the four exchange reasons in Decree Article 153, the excluded farmland rules (three years after zoning as residential, commercial or industrial, or three years after a replotting designation) and the key test that the value difference is no more than 1/4 of the larger value.
When the test fails, it shows how many square meters to remove from or add to which parcel to get within 1/4, and the cash after adjustment.
For a farming-need exchange it gives the date the three-year living and farming duty ends, and it estimates the tax you would owe if the exemption failed.
Three questions this calculator answers
- Does the exchange meet an exemption reason and the 1/4 test?
- How much cash can change hands at most, and how should areas be adjusted if it is over?
- What would the tax be if the exemption failed, and should selling with self-farming or replacement relief be compared?
The four reasons that allow a tax-free farmland exchange
Decree Article 153(1) exempts an exchange or consolidation of farmland only when one of the four reasons below applies.
Farmland means paddies, fields and orchards actually farmed regardless of the land register category, including farm huts, compost sheds, pumping sites, farm roads and waterways (Income Tax Act Article 88(8)).
Exemption reasons for farmland exchanges under Decree Article 153(1) and extra conditions| Item | Reason for exchange or consolidation | Extra condition |
|---|
| Item 1 | Exchange or consolidation due to a project by the state or a local government | 1/4 test and excluded farmland |
| Item 2 | Exchange or consolidation with land owned by the state or a local government | 1/4 test and excluded farmland |
| Item 3 | Exchange needed for farming | Live in the farmland area and farm the new land for 3+ years |
| Item 4 | Exchange or consolidation under the Rural Community Development Act, Farmland Act, Korea Rural Community Corporation Act or Agricultural Cooperatives Act | 1/4 test and excluded farmland |
Swapping land for investment or simply for personal reasons falls under none of the four and is not exempt.
A farming-need exchange (item 3) is the most common reason but the only one with a follow-up duty, so the three-year living and farming plan must be checked as well.
Consolidation means splitting and merging scattered plots into workable units, and the same 1/4 test applies.
The key test: difference ≤ 1/4 of the larger value, and the cash cap
The 1/4 test and cash formulas
Cash = difference = |your land value − their land value|
Pass: difference × 4 ≤ larger value
Larger side fixed: max cash = larger value × 1/4
Smaller side fixed: larger cap = smaller × 4/3 (cash cap = smaller × 1/3)
The calculator compares whole KRW integers, so a difference of exactly 1/4 passes.
Headroom
The maximum cash minus the current difference.
With little headroom, a small change in appraisal can push the exchange over the limit.
Option 1: shrink the larger side
Split the larger parcel and exchange only part of it so its value falls to 4/3 of the smaller one or less.
The value to remove is divided by that parcel’s price per m² to get the area.
Option 2: grow the smaller side
Add more land to the smaller side until its value reaches 3/4 of the larger one.
The extra area is converted at the smaller parcel’s price per m².
Both options assume one price per m² within each parcel.
If prices differ a lot, such as road frontage versus inner land, re-appraise only the part being split.
Two kinds of excluded farmland
Even with a valid reason and the 1/4 test met, excluded farmland under Decree Article 153(4) is not exempt.
In both cases the turning point is whether three years have passed, so check the dates carefully.
1. Three years after urban zoning
Farmland in a special or metropolitan city (excluding counties), special self-governing city (excluding eup and myeon), special self-governing province (excluding eup and myeon of administrative cities) or city (excluding eup and myeon of urban-rural cities) is excluded once three years have passed since it was zoned residential, commercial or industrial, judged on the transfer date.
Phased large projects with delayed compensation, and delays attributable to state, local government or public institution developers, are exceptions.
2. Three years after a replotting designation
Farmland designated as non-farmland replotting land before the final replotting disposition is excluded once three years have passed since the designation.
There is no exception here, so finish the exchange by the deadline based on the designation date.
How the deadline is counted
Under the Civil Act rule that excludes the first day, counting three years from the day after zoning or designation makes the same calendar date three years later the last day.
Zoned on 20 November 2023, the exchange (earlier of balance payment or registration) must be completed by 20 November 2026, and from 21 November it is excluded farmland.
The calculator warns when the deadline is within 90 days, so consider moving the closing date forward.
The three-year living and farming duty for farming-need exchanges
A farming-need exchange (item 3) is exempt only if you live in the farmland area and farm the newly acquired land for at least three years.
The calculator shows the date three years after the exchange as the duty end date.
- Farmland area: you must live in the city, county or district where the land is, an adjacent one, or within 30 km in a straight line (Decree Article 153(3)).
Areas that qualified when farming started but changed through administrative reorganization still count.
- Farming yourself: leasing or outsourcing the new land makes it hard to show the farming condition.
Keep the farm register, direct payment records and receipts for farming supplies.
- Expropriation deemed: expropriation or purchase by agreement for a public project within three years counts as three years of living and farming (Article 153(5)).
- Inheritance combined: if the owner dies within three years, the heir’s farming while living in the area is added to the deceased’s period (Article 153(6)).
Inputs and step-by-step use
- Reason: pick item 1 to 4 of Decree Article 153(1) and mark whether your land and the land you receive are actually farmed.
- Valuation basis: confirm both sides use the same basis and pick appraisal, market or standard value.
- Values and areas: enter the value (KRW) and area (m²) of the land you give and the land you receive.
Cash is computed as the difference, so it is not entered separately.
- Exchange date: enter the earlier of the balance payment date and the registration filing date.
- Excluded farmland: enter whether the land is in a dong area and zoned residential, commercial or industrial with the zoning date, and any replotting designation with its date.
- Three-year duty: for a farming-need exchange, choose how your home relates to the new land and confirm the three-year farming plan.
- Optional: for a boundary exchange enter the split area and the pre-split area; to see the fallback tax enter your land’s acquisition date, price, expenses and non-business status.
- Save: download the TXT review for drafting the exchange contract and for tax advice.
Fictional example: KRW 240 million paddy for a KRW 300 million field
A farmer living in the same county bought a 3,000 m² paddy for KRW 90 million on 10 March 2012 (appraised at KRW 240 million) and exchanges it for a neighbor’s 2,500 m² field (appraised at KRW 300 million) on 20 November 2026 because of farming needs.
Expenses are KRW 3 million and the paddy is business-use farmland that the owner lives near and farms.
Comparison of example 1 and example 2 where the counterparty land is KRW 340 million| Item | Example 1 (theirs KRW 300m) | Example 2 (theirs KRW 340m) |
|---|
| Cash (difference, you pay) | KRW 60,000,000 | KRW 100,000,000 |
| 1/4 of the larger value | KRW 75,000,000 | KRW 85,000,000 |
| Difference ÷ larger value | 20.00% | 29.41% |
| Headroom | KRW 15,000,000 | −KRW 15,000,000 |
| Verdict | Conditional exemption (3-year farming) | Not exempt |
| Duty end date | 2029-11-20 | - |
| Total tax if the exemption fails (business use) | KRW 22,801,900 | KRW 22,801,900 |
In example 1 the KRW 60 million difference is within the KRW 75 million limit, and with the smaller parcel (KRW 240 million) fixed the other side could be up to KRW 320 million, so the cash cap is KRW 80 million.
Had the exemption failed, the KRW 147,000,000 gain less the 14-year long-term deduction of 28% (KRW 41,160,000) and the KRW 2.5 million basic deduction gives a tax base of KRW 103,340,000, capital gains tax of KRW 20,729,000 and local income tax of KRW 2,072,900.
If the same land were non-business land the rate would rise to 45% and the total would be KRW 34,169,300.
In example 2 the KRW 100 million difference exceeds the KRW 85 million limit, so the whole exchange is taxable.
Option 1 removes KRW 20 million of the neighbor’s field (147.06 m² at KRW 136,000 per m²) for cash of KRW 80 million, and option 2 adds KRW 15 million of your paddy (187.5 m² at KRW 80,000 per m²) for cash of KRW 85 million, both within 1/4.
Boundary exchanges and the sell-with-relief route
A boundary exchange is not a transfer
If land is split and exchanged to replace an irrational boundary with a rational one, and the total split area is 20% or less of the total area before the split, it is not a transfer at all (Income Tax Act Article 88(1)1(b), Decree Article 152(3)).
Proof that the conditions are met must be submitted to the tax office.
With 8 years of self-farming, compare selling
For farmland you lived near and farmed for eight years or more, even a taxable exchange can be compared with a sale under the Restriction of Special Taxation Act Article 69 relief (KRW 100 million per tax year and KRW 200 million over five tax years, Article 133).
With four or more years there is also the replacement farmland relief for selling and buying new farmland (Article 70).
The tax shown here is before reliefs, so if the exemption is hard to reach, compare the after-relief tax of a sale in the farmland and forest relief simulator before choosing.
The rural development special tax does not apply to the self-farming and replacement reliefs (Special Tax for Rural Development Act Article 4(2), Decree Article 4(1)1).
When to use it
Swapping paddies with a neighbor
Before trading tangled plots, check that the appraisal gap is within 1/4 and how much cash can be paid.
Local projects and state land
When offered an exchange with state land for a road, river or farm infrastructure project, check the reason and excluded farmland tests.
Just before a three-year deadline
For land nearing three years since urban zoning or a replotting designation, compute the deadline and set the contract and closing dates.
Preparing the exchange contract
The TXT review summarizes values, the ratio, designs and the duty end date to shorten sessions with a scrivener or tax adviser.
Cautions and scope
- The tax office judges valuation methods, reasonableness and whether a reason applies on the facts; the calculator judges your inputs as entered.
- The counterparty’s exemption is judged separately on their land and conditions.
- The 20% boundary ratio compares only the split area and pre-split area you enter; confirm the scope of the denominator with the tax office.
- The fallback tax is your parcel’s tax before reliefs and ignores self-farming or replacement reliefs, aggregation with other transfers and penalties.
- Acquisition tax on the new farmland (3% standard rate) and its reliefs, farmland acquisition qualification and survey costs are not computed.
- A 2027 exchange is compared under fixed 2026 rules, and court cases or rulings are not cited because their full texts could not be verified.
Frequently asked questions
Is a plain swap of farmland really a taxable transfer?
Yes.
Income Tax Act Article 88(1) defines a “transfer” as any paid, de facto transfer of an asset, including an exchange, not just a sale.
A farmland exchange is therefore taxable in principle and is exempt only when Article 89(1)2 and Decree Article 153 are fully met.
If the tests fail, tax applies to the whole gain on the parcel you gave, not only to the cash you received.
Which amount is the 1/4 limit measured against?
The difference between the two land values is compared with the value of the larger parcel.
Swapping a KRW 300 million parcel for a KRW 240 million parcel leaves a KRW 60 million difference, which is within 1/4 of 300 million (KRW 75 million).
Using the smaller value or an average as the denominator makes the margin look bigger than it is.
A difference of exactly 1/4 passes because the rule says “or less”.
Should values be appraisal, market or standard values?
The Decree only says “the land values of both sides” and does not prescribe a method.
In practice the question is whether the contract values match market value, so value both sides on the same basis (ideally appraisals) and keep the evidence with the contract.
Matching only official standard values can hide a market-value ratio above 1/4, so the calculator warns about it.
The tax office decides whether the values are reasonable.
What must I keep doing after a farming-need exchange?
Under the proviso of Decree Article 153(1)3 you must live in the farmland area and farm the newly received land for at least three years.
The farmland area means the city, county or district where the land is, an adjacent one, or anywhere within 30 km in a straight line (Article 153(3)).
Selling, leasing or moving far away within three years can break the exemption, so plan through the duty end date.
What if the land is expropriated or I die within three years?
If the new land is bought by agreement or expropriated under the Land Compensation Act within three years, the three-year duty is deemed met (Decree Article 153(5)).
If the owner dies within three years, the heir’s period counts together with the deceased’s when the heir lives in the area and keeps farming (Article 153(6)).
Stopping for personal reasons does not fall under these special rules.
Can farmland in an urban residential zone be exempt?
Farmland in a dong area of a special or metropolitan city (excluding counties), special self-governing city or province, or city is excluded once three years have passed since it was zoned residential, commercial or industrial (Decree Article 153(4)1).
Eup or myeon areas, and green or management zones, are not caught by this exclusion.
Phased development or delayed compensation in projects with 1,000+ landowners or at least 1,000,000 m² (100,000 m² for housing-site projects), and delays attributable to a public developer, are exceptions (Enforcement Rule Article 70-2).
Is the counterparty exempt as well?
Each party is judged separately.
The result can differ depending on whether the counterparty’s land is actually farmed and whether the reason and exclusion tests fit them.
The 1/4 test uses the same difference for both sides, so recording the agreed values and their basis in the contract helps both filings.
If it is exempt, are there no filings or other taxes at all?
Even with no capital gains tax, the farmland you receive is a paid acquisition and acquisition tax must be filed (Local Tax Act Article 11(1)7(a), 3% standard rate for farmland).
Farmer reliefs on acquisition tax have their own conditions.
For a boundary-adjustment exchange that is not a transfer at all, proof must still be submitted to the tax office (Decree Article 152(4)), so prepare the documents early.
Official sources, versions and items to recheck
Checked on 2026-10-29.
The Income Tax Act MST280405 (article in force 2026-01-01, current), Enforcement Decree MST290841 (in force 2026-10-01, current) and Enforcement Rule MST286379 (in force 2026-07-01, current) were retrieved directly from the Korean National Law Information OPEN API and compared with the articles below.
- Income Tax Act Article 88: exchange as a transfer, boundary exchange carve-out, definition of farmland
- Income Tax Act Article 89(1)2: exemption for farmland exchange and consolidation
- Enforcement Decree Article 153: four reasons, 1/4 test, farmland area, exclusions, expropriation and inheritance rules
- Enforcement Decree Article 152(3)(4): boundary exchange conditions (20%) and proof
- Enforcement Rule Article 70-2: 1,000,000 m² project size, public institutions, unavoidable delays
- Restriction of Special Taxation Act Article 69: 8-year self-farmed farmland relief (for comparison)
Whether both parcels are actually farmed, the zone and zoning date, the replotting designation date, appraisals and the distance between your home and the new land must be checked for each deal.
Results are whole-KRW budgeting estimates and do not replace an exemption filing or the tax office’s determination.
Confirm cash within 1/4, then draft the exchange contract
If the exemption is available, state both land values with their basis (such as appraisal reports) and the cash within 1/4 and who pays it in the exchange contract.
For a farming-need exchange, prepare a plan and evidence for living on and farming the new land through the duty end date, and fix the closing date first if an exclusion deadline is close.
If the exemption is out of reach, negotiate an area adjustment with the counterparty or compare the after-tax result of selling with self-farming or replacement relief.
Compare the after-relief tax of a sale in the farmland and forest relief simulator