diff --git a/app/controllers/internal_api/v1/invoices_controller.rb b/app/controllers/internal_api/v1/invoices_controller.rb
index 58b9e6e821..45feb4dad3 100644
--- a/app/controllers/internal_api/v1/invoices_controller.rb
+++ b/app/controllers/internal_api/v1/invoices_controller.rb
@@ -39,6 +39,14 @@ def update
     }
   end
 
+  def send_invoice
+    authorize invoice
+
+    invoice.send_to_email(subject: invoice_email_params[:subject], recipients: invoice_email_params[:recipients])
+
+    render json: { message: "Invoice will be sent!" }, status: :accepted
+  end
+
   private
 
     def load_client(client_id)
@@ -54,4 +62,8 @@ def invoice_params
         policy(Invoice).permitted_attributes
       )
     end
+
+    def invoice_email_params
+      params.require(:invoice_email).permit(:subject, :body, recipients: [])
+    end
 end
diff --git a/app/policies/invoice_policy.rb b/app/policies/invoice_policy.rb
index 0bbeea43b7..171b85bfff 100644
--- a/app/policies/invoice_policy.rb
+++ b/app/policies/invoice_policy.rb
@@ -17,6 +17,10 @@ def show?
     user_owner_or_admin?
   end
 
+  def send_invoice?
+    user_owner_or_admin?
+  end
+
   def permitted_attributes
     [
       :issue_date, :due_date,
diff --git a/config/routes/internal_api.rb b/config/routes/internal_api.rb
index 370a7a184f..5caa717d49 100644
--- a/config/routes/internal_api.rb
+++ b/config/routes/internal_api.rb
@@ -13,7 +13,9 @@
     resources :timesheet_entry, only: [:index, :create, :update, :destroy]
     resources :reports, only: [:index]
     resources :workspaces, only: [:update]
-    resources :invoices, only: [:index, :create, :update]
+    resources :invoices, only: [:index, :create, :update] do
+      post :send_invoice, on: :member
+    end
     resources :generate_invoice, only: [:index, :show]
   end
 end
diff --git a/spec/requests/internal_api/v1/invoices/send_invoice_spec.rb b/spec/requests/internal_api/v1/invoices/send_invoice_spec.rb
new file mode 100644
index 0000000000..fdc99ea30e
--- /dev/null
+++ b/spec/requests/internal_api/v1/invoices/send_invoice_spec.rb
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe "InternalApi::V1::Invoices#send_invoice", type: :request do
+  let(:client) { create :client_with_invoices }
+  let(:company) { client.company }
+  let(:invoice) { client.invoices.first }
+  let(:user) { create :user, current_workspace_id: company.id }
+
+  context "when user is signed in" do
+    before do
+      create(:company_user, company:, user:)
+    end
+
+    let(:invoice_email) do
+      { subject: "Some Subject", recipients: [client.email, "miru@example.com"], body: "You have an invoice!" }
+    end
+
+    context "when user is an admin" do
+      before do
+        user.add_role :admin, company
+        sign_in user
+      end
+
+      it "returns a 202 response" do
+        post send_invoice_internal_api_v1_invoice_path(id: invoice.id), params: { invoice_email: }
+
+        expect(response).to have_http_status :accepted
+        expect(json_response["message"]).to eq("Invoice will be sent!")
+      end
+
+      it "enqueues an email for delivery" do
+        expect do
+          post send_invoice_internal_api_v1_invoice_path(id: invoice.id), params: { invoice_email: }
+        end.to have_enqueued_mail(InvoiceMailer, :invoice)
+      end
+
+      context "when invoice doesn't exist" do
+        it "returns 404 response" do
+          post send_invoice_internal_api_v1_invoice_path(id: "random")
+
+          expect(response).to have_http_status :not_found
+          expect(json_response["errors"]).to eq "Couldn't find Invoice with 'id'=random"
+        end
+      end
+    end
+
+    context "when user is an employee" do
+      before do
+        user.add_role :employee, company
+        sign_in user
+      end
+
+      it "returns a 403 response" do
+        post send_invoice_internal_api_v1_invoice_path(id: invoice.id)
+
+        expect(response).to have_http_status(:forbidden)
+      end
+    end
+  end
+
+  context "when user is logged out" do
+    it "returns a 401 response" do
+      post send_invoice_internal_api_v1_invoice_path(id: invoice.id)
+
+      expect(response).to have_http_status(:unauthorized)
+      expect(json_response["error"]).to eq("You need to sign in or sign up before continuing.")
+    end
+  end
+end