diff --git a/app/Filters/ClientFilters.php b/app/Filters/ClientFilters.php
index 559ef41c9cd4..a3504cce4e45 100644
--- a/app/Filters/ClientFilters.php
+++ b/app/Filters/ClientFilters.php
@@ -165,6 +165,11 @@ class ClientFilters extends QueryFilters
 
         $dir = ($sort_col[1] == 'asc') ? 'asc' : 'desc';
 
+        if($sort_col[0] == 'number')
+        {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         return $this->builder->orderBy($sort_col[0], $dir);
     }
 
diff --git a/app/Filters/CreditFilters.php b/app/Filters/CreditFilters.php
index 8848318066e3..cee9b9b8d358 100644
--- a/app/Filters/CreditFilters.php
+++ b/app/Filters/CreditFilters.php
@@ -146,6 +146,11 @@ class CreditFilters extends QueryFilters
                     ->whereColumn('clients.id', 'credits.client_id'), $dir);
         }
 
+
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         return $this->builder->orderBy($sort_col[0], $dir);
     }
 
diff --git a/app/Filters/ExpenseFilters.php b/app/Filters/ExpenseFilters.php
index c9cddb8dc793..040fd375ace2 100644
--- a/app/Filters/ExpenseFilters.php
+++ b/app/Filters/ExpenseFilters.php
@@ -172,6 +172,8 @@ class ExpenseFilters extends QueryFilters
             return $this->builder;
         }
 
+        $dir = ($sort_col[1] == 'asc') ? 'asc' : 'desc';
+
         if ($sort_col[0] == 'client_id' && in_array($sort_col[1], ['asc', 'desc'])) {
             return $this->builder
                     ->orderByRaw('ISNULL(client_id), client_id '. $sort_col[1])
@@ -194,6 +196,10 @@ class ExpenseFilters extends QueryFilters
                     ->whereColumn('expense_categories.id', 'expenses.category_id'), $sort_col[1]);
         }
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         if (is_array($sort_col) && in_array($sort_col[1], ['asc', 'desc']) && in_array($sort_col[0], ['public_notes', 'date', 'id_number', 'custom_value1', 'custom_value2', 'custom_value3', 'custom_value4'])) {
             return $this->builder->orderBy($sort_col[0], $sort_col[1]);
         }
diff --git a/app/Filters/InvoiceFilters.php b/app/Filters/InvoiceFilters.php
index f7c11e369f54..aa0c51f0defc 100644
--- a/app/Filters/InvoiceFilters.php
+++ b/app/Filters/InvoiceFilters.php
@@ -318,11 +318,16 @@ class InvoiceFilters extends QueryFilters
 
         if ($sort_col[0] == 'client_id') {
 
-            return $this->builder->orderBy(\App\Models\Client::select('name')
+            return $this->builder->orderBy(\App\Models\Client::select       ('name')
                              ->whereColumn('clients.id', 'invoices.client_id'), $dir);
 
         }
 
+        if($sort_col[0] == 'number')
+        {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         return $this->builder->orderBy($sort_col[0], $dir);
     }
 
diff --git a/app/Filters/PaymentFilters.php b/app/Filters/PaymentFilters.php
index edef4df47329..038bc114375c 100644
--- a/app/Filters/PaymentFilters.php
+++ b/app/Filters/PaymentFilters.php
@@ -167,14 +167,18 @@ class PaymentFilters extends QueryFilters
             return $this->builder;
         }
 
+        $dir = ($sort_col[1] == 'asc') ? 'asc' : 'desc';
 
         if ($sort_col[0] == 'client_id') {
             return $this->builder->orderBy(\App\Models\Client::select('name')
-                    ->whereColumn('clients.id', 'payments.client_id'), $sort_col[1]);
+                    ->whereColumn('clients.id', 'payments.client_id'), $dir);
         }
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
 
-        return $this->builder->orderBy($sort_col[0], $sort_col[1]);
+        return $this->builder->orderBy($sort_col[0], $dir);
     }
 
     public function date_range(string $date_range = ''): Builder
diff --git a/app/Filters/ProjectFilters.php b/app/Filters/ProjectFilters.php
index fdf778aa49af..cd4015596903 100644
--- a/app/Filters/ProjectFilters.php
+++ b/app/Filters/ProjectFilters.php
@@ -59,21 +59,24 @@ class ProjectFilters extends QueryFilters
     public function sort(string $sort = ''): Builder
     {
         $sort_col = explode('|', $sort);
-
-        if ($sort_col[0] == 'client_id') {
-            return $this->builder->orderBy(\App\Models\Client::select('name')
-                    ->whereColumn('clients.id', 'projects.client_id'), $sort_col[1]);
-        }
-
+        
         if (!is_array($sort_col) || count($sort_col) != 2) {
             return $this->builder;
         }
 
-        if (is_array($sort_col) && in_array($sort_col[1], ['asc','desc'])) {
-            return $this->builder->orderBy($sort_col[0], $sort_col[1]);
+        $dir = ($sort_col[1] == 'asc') ? 'asc' : 'desc';
+
+        if ($sort_col[0] == 'client_id') {
+            return $this->builder->orderBy(\App\Models\Client::select('name')
+                    ->whereColumn('clients.id', 'projects.client_id'), $dir);
         }
 
-        return $this->builder;
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
+        return $this->builder->orderBy($sort_col[0], $dir);
+
     }
 
     /**
diff --git a/app/Filters/PurchaseOrderFilters.php b/app/Filters/PurchaseOrderFilters.php
index 952e1514631d..5c1c1b460e4c 100644
--- a/app/Filters/PurchaseOrderFilters.php
+++ b/app/Filters/PurchaseOrderFilters.php
@@ -130,6 +130,10 @@ class PurchaseOrderFilters extends QueryFilters
                     ->whereColumn('vendors.id', 'purchase_orders.vendor_id'), $dir);
         }
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         return $this->builder->orderBy($sort_col[0], $dir);
     }
 
diff --git a/app/Filters/QuoteFilters.php b/app/Filters/QuoteFilters.php
index e06562ee5eb0..db1985b6918a 100644
--- a/app/Filters/QuoteFilters.php
+++ b/app/Filters/QuoteFilters.php
@@ -155,6 +155,10 @@ class QuoteFilters extends QueryFilters
 
         }
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         if ($sort_col[0] == 'valid_until') {
             $sort_col[0] = 'due_date';
         }
diff --git a/app/Filters/RecurringExpenseFilters.php b/app/Filters/RecurringExpenseFilters.php
index b8f3825dc5e3..c342625379fc 100644
--- a/app/Filters/RecurringExpenseFilters.php
+++ b/app/Filters/RecurringExpenseFilters.php
@@ -140,6 +140,8 @@ class RecurringExpenseFilters extends QueryFilters
             return $this->builder;
         }
 
+        $dir = ($sort_col[1] == 'asc') ? 'asc' : 'desc';
+
         if ($sort_col[0] == 'client_id' && in_array($sort_col[1], ['asc', 'desc'])) {
             return $this->builder
                     ->orderByRaw('ISNULL(client_id), client_id '. $sort_col[1])
@@ -162,6 +164,10 @@ class RecurringExpenseFilters extends QueryFilters
                     ->whereColumn('expense_categories.id', 'expenses.category_id'), $sort_col[1]);
         }
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         if (is_array($sort_col) && in_array($sort_col[1], ['asc', 'desc']) && in_array($sort_col[0], ['public_notes', 'date', 'id_number', 'custom_value1', 'custom_value2', 'custom_value3', 'custom_value4'])) {
             return $this->builder->orderBy($sort_col[0], $sort_col[1]);
         }
diff --git a/app/Filters/TaskFilters.php b/app/Filters/TaskFilters.php
index 9743fc63ca49..09cac473e009 100644
--- a/app/Filters/TaskFilters.php
+++ b/app/Filters/TaskFilters.php
@@ -143,6 +143,10 @@ class TaskFilters extends QueryFilters
                     ->whereColumn('users.id', 'tasks.user_id'), $dir);
         }
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         return $this->builder->orderBy($sort_col[0], $dir);
     }
 
diff --git a/app/Filters/VendorFilters.php b/app/Filters/VendorFilters.php
index e1a8eedacf91..ffb428dbf1c3 100644
--- a/app/Filters/VendorFilters.php
+++ b/app/Filters/VendorFilters.php
@@ -71,6 +71,10 @@ class VendorFilters extends QueryFilters
 
         $dir = ($sort_col[1] == 'asc') ? 'asc' : 'desc';
 
+        if($sort_col[0] == 'number') {
+            return $this->builder->orderByRaw('ABS(number) ' . $dir);
+        }
+
         return $this->builder->orderBy($sort_col[0], $dir);
     }