juaristi22 · Oct 19, 2026 · Oct 16, 2026
diff --git a/changelog.d/1796.fixed.md b/changelog.d/1796.fixed.md
@@ -0,0 +1 @@
+- Updated Welsh residential Land Transaction Tax tables for annual model years from 2023 (main rates) and 2025 (higher rates), retaining their statutory change dates.
diff --git a/policyengine_uk/parameters/gov/wra/land_transaction_tax/residential/README.md b/policyengine_uk/parameters/gov/wra/land_transaction_tax/residential/README.md
@@ -1 +1,45 @@
-# Residential
+# Residential Land Transaction Tax
+
+The scales apply marginal rates to the consideration for each purchase. The
+main and additional-property purchase inputs select the main and higher tables
+respectively; the final Land Transaction Tax charge applies only in Wales.
+
+[WSI 2022/1027, regulation 7](https://www.legislation.gov.uk/wsi/2022/1027/regulation/7/made)
+replaced the main residential table from 10 October 2022:
+
+| Portion of consideration | Rate |
+| --- | ---: |
+| Up to £225,000 | 0% |
+| Over £225,000 to £400,000 | 6% |
+| Over £400,000 to £750,000 | 7.5% |
+| Over £750,000 to £1,500,000 | 10% |
+| Over £1,500,000 | 12% |
+
+[WSI 2024/1311, regulation 6](https://www.legislation.gov.uk/wsi/2024/1311/regulation/6/made)
+replaced the higher residential table from 11 December 2024:
+
+| Portion of consideration | Rate |
+| --- | ---: |
+| Up to £180,000 | 5% |
+| Over £180,000 to £250,000 | 8.5% |
+| Over £250,000 to £400,000 | 10% |
+| Over £400,000 to £750,000 | 12.5% |
+| Over £750,000 to £1,500,000 | 15% |
+| Over £1,500,000 | 17% |
+
+The raw parameter files retain these statutory dates and the preceding history.
+The annual model samples transactional parameters on 30 April. Therefore the
+main table changes in model year 2023, while the higher table changes in model
+year 2025. Model years 2022 and 2024 retain their respective April tables;
+neither year blends the old and new rates.
+
+The annual Household purchase inputs have no transaction date, contract date,
+election or subsequent-contract-event fields. They cannot select a transaction
+later in the change year or model protected old contracts. Under
+[the 2022 regulations, regulations 4–6](https://www.legislation.gov.uk/wsi/2022/1027/made),
+qualifying earlier contracts require an election which must not increase tax.
+Under [the 2024 regulations, regulations 4–5](https://www.legislation.gov.uk/wsi/2024/1311/made),
+qualifying earlier contracts are protected without an election requirement.
+Both provisions have conditions and exclusions; an earlier contract alone is
+not sufficient in every case. These transaction-specific provisions are outside
+the annual input contract.
diff --git a/policyengine_uk/parameters/gov/wra/land_transaction_tax/residential/higher_rate.yaml b/policyengine_uk/parameters/gov/wra/land_transaction_tax/residential/higher_rate.yaml
@@ -2,31 +2,37 @@ brackets:
 - rate:
     2018-04-01: 0.03
     2020-12-22: 0.04
+    2024-12-11: 0.05
   threshold:
     2018-04-01: 0
 - rate:
     2018-04-01: 0.065
     2020-12-22: 0.075
+    2024-12-11: 0.085
   threshold:
     2018-04-01: 180000
 - rate:
     2018-04-01: 0.08
     2020-12-22: 0.09
+    2024-12-11: 0.1
   threshold:
     2018-04-01: 250000
 - rate:
     2018-04-01: 0.105
     2020-12-22: 0.115
+    2024-12-11: 0.125
   threshold:
     2018-04-01: 400000
 - rate:
     2018-04-01: 0.13
     2020-12-22: 0.14
+    2024-12-11: 0.15
   threshold:
     2018-04-01: 750000
 - rate:
     2018-04-01: 0.15
     2020-12-22: 0.16
+    2024-12-11: 0.17
   threshold:
     2018-04-01: 1500000
 description: Higher residential property progressive tax scale for non-primary residences.
@@ -42,4 +48,7 @@ metadata:
   - href: https://www.legislation.gov.uk/wsi/2020/1618/regulation/6/made
     title: The Land Transaction Tax (Tax Bands and Tax Rates) (Wales) (Amendment)
       Regulations 2020
+  - href: https://www.legislation.gov.uk/wsi/2024/1311/regulation/6/made
+    title: The Land Transaction Tax (Tax Bands and Tax Rates) (Wales) (Amendment)
+      Regulations 2024, regulation 6, Table 2
   threshold_unit: currency-GBP
diff --git a/policyengine_uk/parameters/gov/wra/land_transaction_tax/residential/primary.yaml b/policyengine_uk/parameters/gov/wra/land_transaction_tax/residential/primary.yaml
@@ -7,14 +7,18 @@ brackets:
     2018-04-01: 0.035
     2020-07-27: null
     2021-07-01: 0.035
+    2022-10-10: 0.06
   threshold:
     2018-04-01: 180000
     2020-07-27: null
     2021-07-01: 180000
+    2022-10-10: 225000
 - rate:
     2018-04-01: 0.05
+    2022-10-10: null
   threshold:
     2018-04-01: 250000
+    2022-10-10: null
 - rate:
     2018-04-01: 0.075
   threshold:
@@ -43,4 +47,7 @@ metadata:
   - href: https://www.legislation.gov.uk/wsi/2021/238/regulation/2/made
     title: The Land Transaction Tax (Temporary Variation of Rates and Bands for Residential
       Property Transactions) (Wales) (Amendment) Regulations 2021
+  - href: https://www.legislation.gov.uk/wsi/2022/1027/regulation/7/made
+    title: The Land Transaction Tax (Tax Bands and Tax Rates) (Wales) (Amendment)
+      Regulations 2022, regulation 7, Table 1
   threshold_unit: currency-GBP
diff --git a/...ngine_uk/tests/policy/baseline/gov/wra/land_transaction_tax/residential_rate_changes.yaml b/...ngine_uk/tests/policy/baseline/gov/wra/land_transaction_tax/residential_rate_changes.yaml
@@ -0,0 +1,166 @@
+# Literal marginal-band sums from WSI 2022/1027 reg 7 and WSI 2024/1311 reg 6.
+# Annual parameters sample 30 April; these are not dated/protected-contract cases.
+- name: Main purchase retains the April 2022 table
+  period: 2022
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 300_000
+    additional_residential_property_purchased: 0
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 4_950
+
+- name: Main purchase uses the new table in annual 2023
+  period: 2023
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 300_000
+    additional_residential_property_purchased: 0
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 4_500
+
+- name: Main purchase at 400000 retains the April 2022 table
+  period: 2022
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 400_000
+    additional_residential_property_purchased: 0
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 9_950
+
+- name: New main table raises tax at the 400000 boundary
+  period: 2023
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 400_000
+    additional_residential_property_purchased: 0
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 10_500
+
+- name: Additional purchase retains the April 2024 table
+  period: 2024
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 0
+    additional_residential_property_purchased: 300_000
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 16_950
+
+- name: Additional purchase uses the new table in annual 2025
+  period: 2025
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 0
+    additional_residential_property_purchased: 300_000
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 19_950
+
+- name: Distinct main and additional purchases use their respective tables
+  period: 2026
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 300_000
+    additional_residential_property_purchased: 300_000
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 24_450
+
+- name: Main purchase reaches every current residential band
+  period: 2025
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 2_000_000
+    additional_residential_property_purchased: 0
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 171_750
+
+- name: Additional purchase reaches every current higher band
+  period: 2025
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 0
+    additional_residential_property_purchased: 2_000_000
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 271_200
+
+- name: No purchase leaves Welsh LTT at zero
+  period: 2025
+  input:
+    age: 45
+    region: WALES
+    main_residential_property_purchased: 0
+    additional_residential_property_purchased: 0
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 0
+
+- name: English purchases do not incur Welsh LTT
+  period: 2025
+  input:
+    age: 45
+    region: LONDON
+    main_residential_property_purchased: 300_000
+    additional_residential_property_purchased: 300_000
+    non_residential_property_purchased: 0
+    rent: 0
+    cumulative_residential_rent: 0
+    non_residential_rent: 0
+    cumulative_non_residential_rent: 0
+  output:
+    land_transaction_tax: 0
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		- Updated Welsh residential Land Transaction Tax tables for annual model years from 2023 (main rates) and 2025 (higher rates), retaining their statutory change dates.