diff --git a/NEWS.md b/NEWS.md
index 4df66abb9..0b27f1b51 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -70,6 +70,8 @@
 
 * Add `strict` qualifier to `validate_numericality_of`. ([#620])
 
+* Add `on` qualifier to `validate_numericality_of`. (h/t [#356], [#358])
+
 [#402]: /~https://github.com/thoughtbot/shoulda-matchers/pull/402
 [#587]: /~https://github.com/thoughtbot/shoulda-matchers/pull/587
 [#662]: /~https://github.com/thoughtbot/shoulda-matchers/pull/662
@@ -82,6 +84,8 @@
 [#677]: /~https://github.com/thoughtbot/shoulda-matchers/pull/677
 [#620]: /~https://github.com/thoughtbot/shoulda-matchers/pull/620
 [#693]: /~https://github.com/thoughtbot/shoulda-matchers/pull/693
+[#356]: /~https://github.com/thoughtbot/shoulda-matchers/pull/356
+[#358]: /~https://github.com/thoughtbot/shoulda-matchers/pull/358
 
 # 2.8.0
 
diff --git a/lib/shoulda/matchers/active_model/numericality_matchers/numeric_type_matcher.rb b/lib/shoulda/matchers/active_model/numericality_matchers/numeric_type_matcher.rb
index ca79d6e12..04ecc4ddf 100644
--- a/lib/shoulda/matchers/active_model/numericality_matchers/numeric_type_matcher.rb
+++ b/lib/shoulda/matchers/active_model/numericality_matchers/numeric_type_matcher.rb
@@ -22,6 +22,11 @@ def strict
             self
           end
 
+          def on(context)
+            @disallow_value_matcher.on(context)
+            self
+          end
+
           def allowed_type
             raise NotImplementedError
           end
diff --git a/lib/shoulda/matchers/active_model/validate_numericality_of_matcher.rb b/lib/shoulda/matchers/active_model/validate_numericality_of_matcher.rb
index 99fc96100..571a7ff96 100644
--- a/lib/shoulda/matchers/active_model/validate_numericality_of_matcher.rb
+++ b/lib/shoulda/matchers/active_model/validate_numericality_of_matcher.rb
@@ -384,6 +384,11 @@ def with_message(message)
           self
         end
 
+        def on(context)
+          @submatchers.each { |matcher| matcher.on(context) }
+          self
+        end
+
         def matches?(subject)
           @subject = subject
           failing_submatchers.empty?
diff --git a/spec/unit/shoulda/matchers/active_model/numericality_matchers/comparison_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/numericality_matchers/comparison_matcher_spec.rb
index 649b5db34..addb3c1c8 100644
--- a/spec/unit/shoulda/matchers/active_model/numericality_matchers/comparison_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/numericality_matchers/comparison_matcher_spec.rb
@@ -197,6 +197,26 @@ def matcher_qualifier
     end
   end
 
+  context 'qualified with on and validating with on' do
+    it 'accepts' do
+      expect(instance_with_validations(on: :customizable)).
+        to matcher.on(:customizable)
+    end
+  end
+
+  context 'qualified with on but not validating with on' do
+    it 'accepts since the validation never considers a context' do
+      expect(instance_with_validations).to matcher.on(:customizable)
+    end
+  end
+
+  context 'not qualified with on but validating with on' do
+    it 'rejects since the validation never runs' do
+      expect(instance_with_validations(on: :customizable)).
+        not_to matcher
+    end
+  end
+
   describe '#comparison_description' do
     [{ operator: :>, value: 0, expectation: 'greater than 0' },
      { operator: :>=, value: -1.0, expectation: 'greater than or equal to -1.0' },
diff --git a/spec/unit/shoulda/matchers/active_model/numericality_matchers/even_number_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/numericality_matchers/even_number_matcher_spec.rb
index fe528c19d..94244dc61 100644
--- a/spec/unit/shoulda/matchers/active_model/numericality_matchers/even_number_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/numericality_matchers/even_number_matcher_spec.rb
@@ -64,6 +64,26 @@
     end
   end
 
+  context 'qualified with on and validating with on' do
+    it 'accepts' do
+      expect(validating_even_number(on: :customizable)).
+        to subject.on(:customizable)
+    end
+  end
+
+  context 'qualified with on but not validating with on' do
+    it 'accepts since the validation never considers a context' do
+      expect(validating_even_number).to subject.on(:customizable)
+    end
+  end
+
+  context 'not qualified with on but validating with on' do
+    it 'rejects since the validation never runs' do
+      expect(validating_even_number(on: :customizable)).
+        not_to subject
+    end
+  end
+
   def validating_even_number(options = {})
     define_model :example, attr: :string do
       validates_numericality_of :attr, { even: true }.merge(options)
diff --git a/spec/unit/shoulda/matchers/active_model/numericality_matchers/odd_number_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/numericality_matchers/odd_number_matcher_spec.rb
index 167ca8898..fe071c6fa 100644
--- a/spec/unit/shoulda/matchers/active_model/numericality_matchers/odd_number_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/numericality_matchers/odd_number_matcher_spec.rb
@@ -64,6 +64,26 @@
     end
   end
 
+  context 'qualified with on and validating with on' do
+    it 'accepts' do
+      expect(validating_odd_number(on: :customizable)).
+        to subject.on(:customizable)
+    end
+  end
+
+  context 'qualified with on but not validating with on' do
+    it 'accepts since the validation never considers a context' do
+      expect(validating_odd_number).to subject.on(:customizable)
+    end
+  end
+
+  context 'not qualified with on but validating with on' do
+    it 'rejects since the validation never runs' do
+      expect(validating_odd_number(on: :customizable)).
+        not_to subject
+    end
+  end
+
   def validating_odd_number(options = {})
     define_model :example, attr: :string do
       validates_numericality_of :attr, { odd: true }.merge(options)
diff --git a/spec/unit/shoulda/matchers/active_model/numericality_matchers/only_integer_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/numericality_matchers/only_integer_matcher_spec.rb
index c833a0e81..d365a3366 100644
--- a/spec/unit/shoulda/matchers/active_model/numericality_matchers/only_integer_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/numericality_matchers/only_integer_matcher_spec.rb
@@ -64,6 +64,26 @@
     end
   end
 
+  context 'qualified with on and validating with on' do
+    it 'accepts' do
+      expect(validating_only_integer(on: :customizable)).
+        to subject.on(:customizable)
+    end
+  end
+
+  context 'qualified with on but not validating with on' do
+    it 'accepts since the validation never considers a context' do
+      expect(validating_only_integer).to subject.on(:customizable)
+    end
+  end
+
+  context 'not qualified with on but validating with on' do
+    it 'rejects since the validation never runs' do
+      expect(validating_only_integer(on: :customizable)).
+        not_to subject
+    end
+  end
+
   def validating_only_integer(options = {})
     define_model :example, attr: :string do
       validates_numericality_of :attr, { only_integer: true }.merge(options)
diff --git a/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb b/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb
index 6d01aa255..8e4c9549c 100644
--- a/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb
+++ b/spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb
@@ -55,6 +55,12 @@ def all_qualifiers
           name: :only_integer,
           validation_name: :only_integer,
           validation_value: true,
+        },
+        {
+          name: :on,
+          argument: :customizable,
+          validation_name: :on,
+          validation_value: :customizable
         }
       ]
     end
@@ -454,6 +460,32 @@ def default_validation_values
     end
   end
 
+  context 'qualified with on and validating with on' do
+    it 'accepts' do
+      record = build_record_validating_numericality(on: :customizable)
+      expect(record).to validate_numericality.on(:customizable)
+    end
+  end
+
+  context 'qualified with on but not validating with on' do
+    it 'accepts since the validation never considers a context' do
+      record = build_record_validating_numericality
+      expect(record).to validate_numericality.on(:customizable)
+    end
+  end
+
+  context 'not qualified with on but validating with on' do
+    it 'rejects since the validation never runs' do
+      record = build_record_validating_numericality(on: :customizable)
+      assertion = lambda do
+        expect(record).to validate_numericality
+      end
+      expect(&assertion).to fail_with_message_including(
+        'Expected errors to include "is not a number"'
+      )
+    end
+  end
+
   context 'with combinations of qualifiers together' do
     all_qualifier_combinations.each do |combination|
       if combination.size > 1
@@ -778,7 +810,8 @@ def apply_qualifiers!(args)
   end
 
   def define_model_validating_numericality(options = {})
-    attribute_name = options.fetch(:attribute_name) { self.attribute_name }
+    attribute_name = options.delete(:attribute_name) { self.attribute_name }
+
     define_model 'Example', attribute_name => :string do |model|
       model.validates_numericality_of(attribute_name, options)
     end