diff --git a/app/Generator/Report/Budget/MonthReportGenerator.php b/app/Generator/Report/Budget/MonthReportGenerator.php
index a79e69517a..07d34f9524 100644
--- a/app/Generator/Report/Budget/MonthReportGenerator.php
+++ b/app/Generator/Report/Budget/MonthReportGenerator.php
@@ -16,6 +16,7 @@ namespace FireflyIII\Generator\Report\Budget;
 
 use Carbon\Carbon;
 use FireflyIII\Generator\Report\ReportGeneratorInterface;
+use FireflyIII\Generator\Report\Support;
 use FireflyIII\Helpers\Collector\JournalCollectorInterface;
 use FireflyIII\Helpers\Filter\OpposingAccountFilter;
 use FireflyIII\Helpers\Filter\PositiveAmountFilter;
@@ -30,7 +31,7 @@ use Log;
  *
  * @package FireflyIII\Generator\Report\Budget
  */
-class MonthReportGenerator implements ReportGeneratorInterface
+class MonthReportGenerator extends Support implements ReportGeneratorInterface
 {
     /** @var  Collection */
     private $accounts;
diff --git a/app/Generator/Report/Category/MonthReportGenerator.php b/app/Generator/Report/Category/MonthReportGenerator.php
index 5537ef1e27..654d819417 100644
--- a/app/Generator/Report/Category/MonthReportGenerator.php
+++ b/app/Generator/Report/Category/MonthReportGenerator.php
@@ -16,6 +16,7 @@ namespace FireflyIII\Generator\Report\Category;
 
 use Carbon\Carbon;
 use FireflyIII\Generator\Report\ReportGeneratorInterface;
+use FireflyIII\Generator\Report\Support;
 use FireflyIII\Helpers\Collector\JournalCollectorInterface;
 use FireflyIII\Helpers\Filter\NegativeAmountFilter;
 use FireflyIII\Helpers\Filter\OpposingAccountFilter;
@@ -31,7 +32,7 @@ use Log;
  *
  * @package FireflyIII\Generator\Report\Category
  */
-class MonthReportGenerator implements ReportGeneratorInterface
+class MonthReportGenerator extends Support implements ReportGeneratorInterface
 {
     /** @var  Collection */
     private $accounts;
diff --git a/app/Generator/Report/Support.php b/app/Generator/Report/Support.php
new file mode 100644
index 0000000000..563e72f12b
--- /dev/null
+++ b/app/Generator/Report/Support.php
@@ -0,0 +1,148 @@
+<?php
+/**
+ * Support.php
+ * Copyright (C) 2016 thegrumpydictator@gmail.com
+ *
+ * This software may be modified and distributed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Generator\Report;
+
+use FireflyIII\Models\Transaction;
+use Illuminate\Support\Collection;
+use Log;
+
+
+/**
+ * Class Support
+ *
+ * @package FireflyIII\Generator\Report\Category
+ */
+class Support
+{
+    /**
+     * @return Collection
+     */
+    public function getTopExpenses(): Collection
+    {
+        $transactions = $this->getExpenses()->sortBy('transaction_amount');
+
+        return $transactions;
+    }
+
+    /**
+     * @return Collection
+     */
+    public function getTopIncome(): Collection
+    {
+        $transactions = $this->getIncome()->sortByDesc('transaction_amount');
+
+        return $transactions;
+    }
+
+    /**
+     * @param Collection $collection
+     * @param int        $sortFlag
+     *
+     * @return array
+     */
+    protected function getAverages(Collection $collection, int $sortFlag): array
+    {
+        $result = [];
+        /** @var Transaction $transaction */
+        foreach ($collection as $transaction) {
+            // opposing name and ID:
+            $opposingId = $transaction->opposing_account_id;
+
+            // is not set?
+            if (!isset($result[$opposingId])) {
+                $name                = $transaction->opposing_account_name;
+                $result[$opposingId] = [
+                    'name'    => $name,
+                    'count'   => 1,
+                    'id'      => $opposingId,
+                    'average' => $transaction->transaction_amount,
+                    'sum'     => $transaction->transaction_amount,
+                ];
+                continue;
+            }
+            $result[$opposingId]['count']++;
+            $result[$opposingId]['sum']     = bcadd($result[$opposingId]['sum'], $transaction->transaction_amount);
+            $result[$opposingId]['average'] = bcdiv($result[$opposingId]['sum'], strval($result[$opposingId]['count']));
+        }
+
+        // sort result by average:
+        $average = [];
+        foreach ($result as $key => $row) {
+            $average[$key] = floatval($row['average']);
+        }
+
+        array_multisort($average, $sortFlag, $result);
+
+        return $result;
+    }
+
+    /**
+     * @SuppressWarnings(PHPMD.CyclomaticComplexity) // it's exactly five.
+     * @param array $spent
+     * @param array $earned
+     *
+     * @return array
+     */
+    protected function getObjectSummary(array $spent, array $earned): array
+    {
+        $return = [];
+
+        /**
+         * @var int    $accountId
+         * @var string $entry
+         */
+        foreach ($spent as $objectId => $entry) {
+            if (!isset($return[$objectId])) {
+                $return[$objectId] = ['spent' => 0, 'earned' => 0];
+            }
+
+            $return[$objectId]['spent'] = $entry;
+        }
+        unset($entry);
+
+        /**
+         * @var int    $accountId
+         * @var string $entry
+         */
+        foreach ($earned as $objectId => $entry) {
+            if (!isset($return[$objectId])) {
+                $return[$objectId] = ['spent' => 0, 'earned' => 0];
+            }
+
+            $return[$objectId]['earned'] = $entry;
+        }
+
+
+        return $return;
+    }
+
+    /**
+     * @param Collection $collection
+     *
+     * @return array
+     */
+    protected function summarizeByAccount(Collection $collection): array
+    {
+        $result = [];
+        /** @var Transaction $transaction */
+        foreach ($collection as $transaction) {
+            $accountId          = $transaction->account_id;
+            $result[$accountId] = $result[$accountId] ?? '0';
+            $result[$accountId] = bcadd($transaction->transaction_amount, $result[$accountId]);
+        }
+
+        return $result;
+    }
+
+}