diff --git a/app/jobs/reports/monthly_account_reuse_report.rb b/app/jobs/reports/monthly_account_reuse_report.rb
new file mode 100644
index 00000000000..82be2eda6c4
--- /dev/null
+++ b/app/jobs/reports/monthly_account_reuse_report.rb
@@ -0,0 +1,162 @@
+require 'csv'
+
+module Reports
+  class MonthlyAccountReuseReport < BaseReport
+    REPORT_NAME = 'monthly-account-reuse-report'
+
+    attr_reader :report_date
+
+    def perform(report_date)
+      @report_date = report_date
+
+      _latest, path = generate_s3_paths(REPORT_NAME, 'json', now: report_date)
+      body = report_body.to_json
+
+      if bucket_name.present?
+        upload_file_to_s3_bucket(
+          path: path,
+          body: body,
+          content_type: 'application/json',
+          bucket: bucket_name,
+        )
+      end
+    end
+
+    def first_day_of_report_month
+      report_date.beginning_of_month.strftime('%Y-%m-%d')
+    end
+
+    def params
+      {
+        query_date: first_day_of_report_month,
+      }.transform_values { |v| ActiveRecord::Base.connection.quote(v) }
+    end
+
+    def agency_reuse_results
+      agency_sql = format(<<-SQL, params)
+          SELECT
+              COUNT(*) AS num_users
+              , agencies_per_user.num_agencies
+          FROM (
+              SELECT
+                  COUNT(DISTINCT agencies.id) AS num_agencies
+                  , identities.user_id
+              FROM 
+                  identities
+              JOIN 
+                  service_providers sp ON identities.service_provider = sp.issuer
+              JOIN 
+                  agencies ON sp.agency_id = agencies.id
+              WHERE
+                  identities.last_ial2_authenticated_at IS NOT NULL
+              AND
+                  identities.verified_at < %{query_date}
+              GROUP BY 
+                  identities.user_id
+          ) agencies_per_user
+          GROUP BY 
+              agencies_per_user.num_agencies
+          HAVING agencies_per_user.num_agencies > 1
+          ORDER BY 
+              num_agencies ASC
+      SQL
+
+      agency_results = transaction_with_timeout do
+        ActiveRecord::Base.connection.execute(agency_sql)
+      end
+
+      agency_results.as_json
+    end
+
+    def num_active_profiles
+      proofed_sql = format(<<-SQL, params)
+          SELECT
+            COUNT(*) AS num_proofed
+          FROM
+            profiles
+          WHERE
+            profiles.active = TRUE
+          AND
+            profiles.activated_at < %{query_date}
+      SQL
+
+      proofed_results = transaction_with_timeout do
+        ActiveRecord::Base.connection.execute(proofed_sql)
+      end
+
+      proofed_results.first['num_proofed']
+    end
+
+    def stats_month
+      report_date.prev_month(1).strftime('%b-%Y')
+    end
+
+    def total_reuse_report
+      reuse_stats = agency_reuse_results
+
+      reuse_total_users = 0
+      reuse_total_percentage = 0
+
+      total_proofed = num_active_profiles
+
+      if !reuse_stats.empty?
+        reuse_stats.each do |result_entry|
+          reuse_total_users += result_entry['num_users']
+        end
+
+        if total_proofed > 0
+          reuse_stats.each_with_index do |result_entry, index|
+            reuse_stats[index]['percentage'] =
+              result_entry['num_users'] / total_proofed.to_f * 100
+
+            reuse_total_percentage += reuse_stats[index]['percentage']
+          end
+        end
+      end
+
+      # reuse_stats and total_stats
+      { reuse_stats: reuse_stats,
+        total_users: reuse_total_users,
+        total_percentage: reuse_total_percentage,
+        total_proofed: total_proofed }
+    end
+
+    def report_csv
+      monthly_reuse_report = total_reuse_report
+
+      csv_array = []
+      csv_array << ["IDV app reuse rate #{stats_month}"]
+      csv_array << ['Num. SPs', 'Num. users', 'Percentage']
+
+      monthly_reuse_report[:reuse_stats].each do |result_entry|
+        csv_array << [
+          result_entry['num_agencies'],
+          result_entry['num_users'],
+          result_entry['percentage'],
+        ]
+      end
+      csv_array << [
+        'Total (all >1)',
+        monthly_reuse_report[:total_users],
+        monthly_reuse_report[:total_percentage],
+      ]
+
+      csv_array << []
+      csv_array << ['Total proofed identities']
+      csv_array << [
+        "Total proofed identities (#{stats_month})",
+        monthly_reuse_report[:total_proofed],
+      ]
+
+      csv_array
+    end
+
+    def report_body
+      {
+        report_date: first_day_of_report_month,
+        month: stats_month,
+        results: [report_csv],
+      }
+    end
+  end
+end
diff --git a/config/initializers/job_configurations.rb b/config/initializers/job_configurations.rb
index 8c1d45db7b9..8d62b722c2b 100644
--- a/config/initializers/job_configurations.rb
+++ b/config/initializers/job_configurations.rb
@@ -4,6 +4,7 @@
 cron_24h = '0 0 * * *'
 gpo_cron_24h = '0 10 * * *' # 10am UTC is 5am EST/6am EDT
 cron_1w = '0 0 * * 0'
+cron_1st_of_mo = '0 0 1 * *'
 
 if defined?(Rails::Console)
   Rails.logger.info 'job_configurations: console detected, skipping schedule'
@@ -188,6 +189,11 @@
         cron: cron_24h,
         args: -> { [Time.zone.today] },
       },
+      monthly_account_reuse_report: {
+        class: 'Reports::MonthlyAccountReuseReport',
+        cron: cron_1st_of_mo,
+        args: -> { [Time.zone.today] },
+      },
     }.compact
   end
   # rubocop:enable Metrics/BlockLength
diff --git a/spec/jobs/reports/monthly_account_reuse_report_spec.rb b/spec/jobs/reports/monthly_account_reuse_report_spec.rb
new file mode 100644
index 00000000000..62cd578a58e
--- /dev/null
+++ b/spec/jobs/reports/monthly_account_reuse_report_spec.rb
@@ -0,0 +1,147 @@
+require 'rails_helper'
+require 'csv'
+
+RSpec.describe Reports::MonthlyAccountReuseReport do
+  subject(:report) { Reports::MonthlyAccountReuseReport.new }
+
+  let(:report_date) { Date.new(2021, 3, 1) }
+  let(:s3_report_bucket_prefix) { 'reports-bucket' }
+  let(:s3_report_path) do
+    'int/monthly-account-reuse-report/2021/2021-03-01.monthly-account-reuse-report.json'
+  end
+
+  before do
+    allow(Identity::Hostdata).to receive(:env).and_return('int')
+    allow(Identity::Hostdata).to receive(:aws_account_id).and_return('1234')
+    allow(Identity::Hostdata).to receive(:aws_region).and_return('us-west-1')
+    allow(IdentityConfig.store).to receive(:s3_report_bucket_prefix).
+      and_return(s3_report_bucket_prefix)
+
+    Aws.config[:s3] = {
+      stub_responses: {
+        put_object: {},
+      },
+    }
+  end
+
+  describe '#perform' do
+    it 'uploads a file to S3 based on the report date' do
+      expect(report).to receive(:upload_file_to_s3_bucket).with(
+        path: s3_report_path,
+        body: kind_of(String),
+        content_type: 'application/json',
+        bucket: 'reports-bucket.1234-us-west-1',
+      ).exactly(1).time.and_call_original
+
+      expect(report).to receive(:report_body).and_call_original.once
+
+      report.perform(report_date)
+    end
+
+    context 'with data' do
+      let(:in_query) { report_date - 12.days }
+      let(:out_of_query) { report_date + 12.days }
+
+      let(:agency) { create(:agency, name: 'The Agency') }
+      let(:agency2) { create(:agency, name: 'The Other Agency') }
+      let(:agency3) { create(:agency, name: 'The Other Other Agency') }
+      let(:sp_a) { 'a' }
+      let(:sp_b) { 'b' }
+      let(:sp_c) { 'c' }
+
+      def create_identity(id, provider, verified_time)
+        ServiceProviderIdentity.create(
+          user_id: id, service_provider: provider,
+          last_ial2_authenticated_at: in_query, verified_at: verified_time
+        )
+      end
+
+      before do
+        create(
+          :service_provider,
+          issuer: sp_a,
+          iaa: 'iaa123',
+          friendly_name: 'The App',
+          agency: agency,
+        )
+        create(
+          :service_provider,
+          issuer: sp_b,
+          iaa: 'iaa456',
+          friendly_name: 'The Other App',
+          agency: agency2,
+        )
+        create(
+          :service_provider,
+          issuer: sp_c,
+          iaa: 'iaa789',
+          friendly_name: 'The Other Other App',
+          agency: agency3,
+        )
+
+        # Seed the database with data to be queried
+        #
+        # User 1 has 3 SPs and 3 show up in the query
+        # User 2 has 3 SPs and 3 show up in the query
+        # User 3 has 3 SPs and only 2 show up in the query
+        # User 4 has 2 SPs and 2 show up in the query
+        # User 5 has 2 SPs and 2 show up in the query
+        # User 6 has 2 SPs and only 1 shows up in the query
+        # User 7 has 1 SP and 1 shows up in the query
+        # User 8 has 1 SP and 0 show up in the query
+        #
+        # This will give 2 users with 3 SPs and 3 users with 2 SPs for the report
+
+        users_to_query = [
+          { id: 1, sp: [sp_a, sp_b, sp_c], timestamp: [in_query, in_query, in_query] },
+          { id: 2, sp: [sp_a, sp_b, sp_c], timestamp: [in_query, in_query, in_query] },
+          { id: 3, sp: [sp_a, sp_b, sp_c], timestamp: [in_query, in_query, out_of_query] },
+          { id: 4, sp: [sp_a, sp_b], timestamp: [in_query, in_query] },
+          { id: 5, sp: [sp_a, sp_b], timestamp: [in_query, in_query] },
+          { id: 6, sp: [sp_a, sp_b], timestamp: [in_query, out_of_query] },
+          { id: 7, sp: [sp_a], timestamp: [in_query] },
+          { id: 8, sp: [sp_a], timestamp: [out_of_query] },
+        ]
+
+        users_to_query.each do |user|
+          user[:sp].each_with_index do |sp, i|
+            create_identity(user[:id], sp, user[:timestamp][i])
+          end
+        end
+
+        # Create active profiles for total_proofed_identities
+        # These 13 profiles will yield 10 active profiles in the results
+        (1..10).each do |_|
+          create(:profile, :active, activated_at: in_query)
+        end
+        (1..3).each do |_|
+          create(:profile, :active, activated_at: out_of_query)
+        end
+      end
+
+      it 'aggregates by issuer' do
+        expect(report).to receive(:upload_file_to_s3_bucket).
+          exactly(1).times do |path:, body:, content_type:, bucket:|
+            parsed = JSON.parse(body, symbolize_names: true)
+
+            expect(parsed[:report_date]).to eq(report_date.strftime('%Y-%m-01'))
+            expect(parsed[:month]).to eq(report_date.prev_month(1).strftime('%b-%Y'))
+            actual_csv = parsed[:results]
+            expected_csv = [
+              ['IDV app reuse rate Feb-2021'],
+              ['Num. SPs', 'Num. users', 'Percentage'],
+              [2, 3, 30.0],
+              [3, 2, 20.0],
+              ['Total (all >1)', 5, 50.0],
+              [],
+              ['Total proofed identities'],
+              ['Total proofed identities (Feb-2021)', 10],
+            ]
+            expect(actual_csv.first).to eq(expected_csv)
+          end
+
+        report.perform(report_date)
+      end
+    end
+  end
+end