PolicyEngine · RuoqiTan · May 25, 2023 · May 26, 2023 · May 26, 2023 · May 26, 2023
diff --git a/changelog_entry.yaml b/changelog_entry.yaml
@@ -0,0 +1,4 @@
+- bump: minor
+  changes:
+    added:
+    - Yukon age amount.
diff --git a/policyengine_canada/parameters/gov/provinces/yt/tax/income/credits/age_amount/age.yaml b/policyengine_canada/parameters/gov/provinces/yt/tax/income/credits/age_amount/age.yaml
@@ -0,0 +1,13 @@
+description: Yukon qualifies filers for the age amount credit at or above this age threshold.
+values:
+  2023-01-01: 65
+metadata:
+  unit: year
+  label: Yukon age amount eligible age
+  reference:
+  - title: Worksheet for the Yukon 2023 Personal Tax Credits Return
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1yt-ws/td1yt-ws-23e.pdf#page=1
+  - title: Yukon Income Tax Act -- Age Credit
+    href: https://laws.yukon.ca/cms/images/LEGISLATION/PRINCIPAL/2002/2002-0118/2002-0118.pdf#page=8
+  - title: Worksheet for the Yukon 2022 Personal Tax Credits Return
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1yt-ws/td1yt-ws-22e.pdf
diff --git a/...gine_canada/parameters/gov/provinces/yt/tax/income/credits/age_amount/maximum_amount.yaml b/...gine_canada/parameters/gov/provinces/yt/tax/income/credits/age_amount/maximum_amount.yaml
@@ -0,0 +1,14 @@
+description: Yukon provides this maximum amount under the age amount credit.
+values:
+  2022-01-01: 7_898
+  2023-01-01: 8_396
+metadata:
+  unit: currency-CAD
+  label: Yukon age amount maximum amount
+  reference:
+  - title: Worksheet for the Yukon 2023 Personal Tax Credits Return
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1yt-ws/td1yt-ws-23e.pdf
+  - title: Yukon Income Tax Act -- Age Credit
+    href: https://laws.yukon.ca/cms/images/LEGISLATION/PRINCIPAL/2002/2002-0118/2002-0118.pdf#page=8
+  - title: Worksheet for the Yukon 2022 Personal Tax Credits Return
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1yt-ws/td1yt-ws-22e.pdf
diff --git a/policyengine_canada/parameters/gov/provinces/yt/tax/income/credits/age_amount/rate.yaml b/policyengine_canada/parameters/gov/provinces/yt/tax/income/credits/age_amount/rate.yaml
@@ -0,0 +1,24 @@
+description: Yukon reduces the age amount credit at this rate.
+brackets:
+  - threshold:
+      2022-01-01: 0
+    rate:
+      2022-01-01: 0
+  - threshold:
+      2022-01-01: 39_826
+      2023-01-01: 42_335
+    rate:
+      2022-01-01: 0.15
+
+metadata:
+  type: marginal_rate
+  threshold_unit: currency-CAD
+  rate_unit: /1
+  label: Yukon age amount applicable rate
+  reference:
+  - title: Worksheet for the Yukon 2023 Personal Tax Credits Return
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1yt-ws/td1yt-ws-23e.pdf
+  - title: Yukon Income Tax Act -- Age Credit
+    href: https://laws.yukon.ca/cms/images/LEGISLATION/PRINCIPAL/2002/2002-0118/2002-0118.pdf#page=8
+  - title: Worksheet for the Yukon 2022 Personal Tax Credits Return
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1yt-ws/td1yt-ws-22e.pdf
diff --git a/policyengine_canada/tests/gov/provinces/yt/tax/income/credits/yt_age_amount.yaml b/policyengine_canada/tests/gov/provinces/yt/tax/income/credits/yt_age_amount.yaml
@@ -0,0 +1,35 @@
+- name: Not eligible for age amount
+  period: 2023
+  input:
+    province_code: YT
+    individual_net_income: 10_000
+    age: 64
+  output:
+    yt_age_amount: 0
+
+- name: Not eligible through net income
+  period: 2023
+  input:
+    province_code: YT
+    individual_net_income: 100_000
+    age: 70
+  output:
+    yt_age_amount: 0
+
+- name: Eligible & maximum age amount (net income < base amount)
+  period: 2023
+  input:
+    province_code: YT
+    individual_net_income: 10_000
+    age: 65
+  output:
+    yt_age_amount: 8_396
+
+- name: Eligible & net income between base amount and maximum amount (8396-(62335-42335)*0.15 = 5396)
+  period: 2023
+  input:
+    province_code: YT
+    individual_net_income: 62_335
+    age: 70
+  output:
+    yt_age_amount: 5_396
diff --git a/policyengine_canada/variables/gov/provinces/yt/tax/income/credits/yt_age_amount.py b/policyengine_canada/variables/gov/provinces/yt/tax/income/credits/yt_age_amount.py
@@ -0,0 +1,18 @@
+from policyengine_canada.model_api import *
+
+
+class yt_age_amount(Variable):
+    value_type = float
+    entity = Person
+    label = "Yukon age amount"
+    definition_period = YEAR
+    defined_for = ProvinceCode.YT
+
+    def formula(person, period, parameters):
+        income = person("individual_net_income", period)
+        age = person("age", period)
+        p = parameters(period).gov.provinces.yt.tax.income.credits.age_amount
+        reduction = p.rate.calc(income)
+        reduced_amount = max_(p.maximum_amount - reduction, 0)
+        age_eligible = age >= p.age
+        return age_eligible * reduced_amount