diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59a9d960c..4a56b9b83 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), 
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.13.2] - 2024-10-28 10:46:29
+
+### Fixed
+
+- Threshold freeze for ST extended to 2027.
+
 ## [2.13.1] - 2024-10-24 13:24:27
 
 ### Fixed
@@ -1567,6 +1573,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
+[2.13.2]: https://github.com/PolicyEngine/openfisca-uk/compare/2.13.1...2.13.2
 [2.13.1]: https://github.com/PolicyEngine/openfisca-uk/compare/2.13.0...2.13.1
 [2.13.0]: https://github.com/PolicyEngine/openfisca-uk/compare/2.12.0...2.13.0
 [2.12.0]: https://github.com/PolicyEngine/openfisca-uk/compare/2.11.0...2.12.0
diff --git a/changelog.yaml b/changelog.yaml
index 4983bc533..cc39a6a0a 100644
--- a/changelog.yaml
+++ b/changelog.yaml
@@ -1315,3 +1315,8 @@
     fixed:
     - Bug causing capital gains responses to be calculated for every reform simulation.
   date: 2024-10-24 13:24:27
+- bump: patch
+  changes:
+    fixed:
+    - Threshold freeze for ST extended to 2027.
+  date: 2024-10-28 10:46:29
diff --git a/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/lower_earnings_limit.yaml b/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/lower_earnings_limit.yaml
index e6cbbb545..778145078 100644
--- a/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/lower_earnings_limit.yaml
+++ b/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/lower_earnings_limit.yaml
@@ -23,3 +23,9 @@ values:
         title: The Social Security (Contributions) (Rates, Limits and Thresholds Amendments
           and National Insurance Funds Payments) Regulations 2022(6)
     value: 123
+  2027-04-01:
+    value: 123
+    metadata:
+      reference:
+        - title: Spring Statement 2022
+          href: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1062486/Spring_Statement_2022_Web_Accessible.pdf
diff --git a/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/secondary_threshold.yaml b/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/secondary_threshold.yaml
index 51fc965a2..694f98997 100644
--- a/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/secondary_threshold.yaml
+++ b/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/secondary_threshold.yaml
@@ -22,4 +22,10 @@ values:
         title: The Social Security (Contributions) (Rates, Limits and Thresholds Amendments
           and National Insurance Funds Payments) Regulations 2022(6)
     value: 175
-  2024-01-01: 175
\ No newline at end of file
+  2024-01-01: 175
+  2027-04-01:
+    value: 241.73
+    metadata:
+      reference:
+        - title: Spring Statement 2022
+          href: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1062486/Spring_Statement_2022_Web_Accessible.pdf
diff --git a/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/upper_earnings_limit.yaml b/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/upper_earnings_limit.yaml
index 81c24f510..45cef3ab6 100644
--- a/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/upper_earnings_limit.yaml
+++ b/policyengine_uk/parameters/gov/hmrc/national_insurance/class_1/thresholds/upper_earnings_limit.yaml
@@ -7,7 +7,7 @@ values:
   2019-04-06: 962
   2020-04-06: 962
   2021-04-06: 966.73
-  2026-04-06: 966.73
+  2027-04-06: 966.73
 metadata:
   label: NI Upper Earnings Limit
   unit: currency-GBP
diff --git a/policyengine_uk/variables/gov/hmrc/national_insurance/class_1/ni_class_1_employer.py b/policyengine_uk/variables/gov/hmrc/national_insurance/class_1/ni_class_1_employer.py
index 9189d68a5..0e74bc5dd 100644
--- a/policyengine_uk/variables/gov/hmrc/national_insurance/class_1/ni_class_1_employer.py
+++ b/policyengine_uk/variables/gov/hmrc/national_insurance/class_1/ni_class_1_employer.py
@@ -5,7 +5,7 @@ class ni_class_1_employer(Variable):
     value_type = float
     entity = Person
     label = "NI Class 1 employer-side contributions"
-    definition_period = MONTH
+    definition_period = YEAR
     unit = GBP
     defined_for = "ni_liable"
     reference = "https://www.legislation.gov.uk/ukpga/1992/4/section/9"
@@ -23,9 +23,7 @@ def formula(person, period, parameters):
         else:
             taxed_earnings = earnings
         secondary_threshold = (
-            class_1.thresholds.secondary_threshold
-            * WEEKS_IN_YEAR
-            / MONTHS_IN_YEAR
+            class_1.thresholds.secondary_threshold * WEEKS_IN_YEAR
         )
         main_earnings = max_(
             taxed_earnings - secondary_threshold,
diff --git a/setup.py b/setup.py
index a944bf298..bbfd87ac0 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 
 setup(
     name="PolicyEngine-UK",
-    version="2.13.1",
+    version="2.13.2",
     author="PolicyEngine",
     author_email="nikhil@policyengine.org",
     classifiers=[