diff --git a/src/beanify/base/rules.py b/src/beanify/base/rules.py
index 61b7737..b08903c 100644
--- a/src/beanify/base/rules.py
+++ b/src/beanify/base/rules.py
@@ -1,21 +1,39 @@
+import re
 from typing import Self
 import os
 
 
 class Rule:
-    __slots__ = ("conditions", "values")
+    __slots__ = ("conditions", "values", "extended")
 
-    def __init__(self, conditions: dict[str, str], values: dict[str, str]):
+    def __init__(
+        self, conditions: dict[str, str], values: dict[str, str], extended=False
+    ):
         self.conditions = conditions
         self.values = values
+        self.extended = extended
 
     def check(self, record: dict[str, str]) -> bool:
         """
         Check whether this rule applies to the given record fields.
         """
-        return all(
-            record.get(key, None) == value for key, value in self.conditions.items()
-        )
+        if self.extended:
+            match = True
+            for key, pattern in self.conditions.items():
+                actualvalue = record.get(key, None)
+                if isinstance(pattern, str) and isinstance(actualvalue, str):
+                    match = match and bool(re.match(pattern, actualvalue))
+                else:
+                    # Fallback to equality
+                    match = match and (pattern == actualvalue)
+                if not match:
+                    break
+        else:
+            match = all(
+                record.get(key, None) == value for key, value in self.conditions.items()
+            )
+
+        return match
 
 
 class RuleInterface:
@@ -71,6 +89,7 @@ class JSONRuleInterface(RuleInterface):
             rule = Rule(
                 conditions=rule_data["record_fields"],
                 values=rule_data["transaction_fields"],
+                extended=rule_data.get("extended", False),
             )
             rules.append(rule)
 
@@ -85,6 +104,7 @@ class JSONRuleInterface(RuleInterface):
                 {
                     "record_fields": rule.conditions,
                     "transaction_fields": rule.values,
+                    "extended": rule.extended,
                 }
             )
 
diff --git a/src/beanify/gui/mainwindow.py b/src/beanify/gui/mainwindow.py
index 708bcc7..18a9cf8 100644
--- a/src/beanify/gui/mainwindow.py
+++ b/src/beanify/gui/mainwindow.py
@@ -167,9 +167,9 @@ class MainWindow(ThemedTk):
 
     def rule_created(self, event):
         logger.debug(f"Received RowEditor rulecreated event {event!r}")
-        conditions, values = self.editor.make_rule()
+        conditions, values, extended = self.editor.make_rule()
 
-        rule = Rule(conditions, values)
+        rule = Rule(conditions, values, extended)
 
         affected = sum(rule.check(record.match_fields()) for record in self.rows)
         self.ruleset.add_rule(rule)
diff --git a/src/beanify/gui/roweditor.py b/src/beanify/gui/roweditor.py
index 846e71e..edf88a8 100644
--- a/src/beanify/gui/roweditor.py
+++ b/src/beanify/gui/roweditor.py
@@ -59,13 +59,29 @@ class RowEditor(ttk.Frame):
         )
         self.txn_frame.columnconfigure(2, weight=1)
 
+        self.matchopt_frame = ttk.Frame(self)
+        self.matchopt_frame.grid(row=0, column=1, sticky="ew")
+        self.matchopt_frame.columnconfigure(0, weight=0)
+        self.matchopt_frame.columnconfigure(1, weight=1)
+        self.matchopt_frame.columnconfigure(2, weight=0)
+        self.matchopt_frame.columnconfigure(3, weight=0)
+
         self.match_var = BooleanVar()
         self.match_toggle = ttk.Checkbutton(
             self, variable=self.match_var, command=self._display_matchboxes
         )
-        self.match_label = ttk.Label(self, text="Rule creation mode")
         self.match_toggle.grid(row=0, column=0, padx=11, pady=10, sticky="nw")
-        self.match_label.grid(row=0, column=1, padx=7, pady=10, sticky="nw")
+
+        self.match_label = ttk.Label(self.matchopt_frame, text="Rule creation mode")
+        self.match_label.grid(row=0, column=0, padx=7, pady=10, sticky="nw")
+
+        self.extended_var = BooleanVar()
+        self.extended_toggle = ttk.Checkbutton(
+            self.matchopt_frame, variable=self.extended_var
+        )
+        self.extended_label = ttk.Label(self.matchopt_frame, text="Extended")
+        self.extended_toggle.grid(row=0, column=2, padx=11, pady=10, sticky="nw")
+        self.extended_label.grid(row=0, column=3, padx=7, pady=10, sticky="nw")
 
         self.button_frame = ttk.Frame(self, padding=(2, 2, 3, 3))
         self.button_frame.grid(row=3, column=0, columnspan=2, sticky="s")
@@ -236,6 +252,8 @@ class RowEditor(ttk.Frame):
                     label.grid_remove()
                     entry.grid(row=i, column=2, sticky="ew", padx=5)
             self.rule_button.configure(state="enabled")
+            self.extended_toggle.grid(row=0, column=2, padx=11, pady=10, sticky="nw")
+            self.extended_label.grid(row=0, column=3, padx=7, pady=10, sticky="nw")
         else:
             # Disable match boxes
             for i, (box, _, _) in enumerate(self.txn_rows.values()):
@@ -249,6 +267,8 @@ class RowEditor(ttk.Frame):
                     entry.grid_remove()
             # Also disable rule button
             self.rule_button.configure(state="disabled")
+            self.extended_toggle.grid_remove()
+            self.extended_label.grid_remove()
 
     def do_save_txn(self):
         if not self.rows:
@@ -299,7 +319,7 @@ class RowEditor(ttk.Frame):
         }
         update_fields = txn.parse_input(input_fields)
 
-        return (rule_record_fields, update_fields)
+        return (rule_record_fields, update_fields, self.extended_var.get())
 
     def _display_txns(self, txns: list[PartialTXN]):
         if txns and not self.showing_txn: