diff --git a/redbot/cogs/economy/economy.py b/redbot/cogs/economy/economy.py
index 6d56f75e4..39db1c9d2 100644
--- a/redbot/cogs/economy/economy.py
+++ b/redbot/cogs/economy/economy.py
@@ -101,19 +101,30 @@ def guild_only_check():
 class SetParser:
     def __init__(self, argument):
         allowed = ("+", "-")
-        self.sum = int(argument)
+        try:
+            self.sum = int(argument)
+        except ValueError:
+            raise commands.BadArgument(
+                _(
+                    "Invalid value, the argument must be an integer,"
+                    " optionally preceded with a `+` or `-` sign."
+                )
+            )
         if argument and argument[0] in allowed:
             if self.sum < 0:
                 self.operation = "withdraw"
             elif self.sum > 0:
                 self.operation = "deposit"
             else:
-                raise RuntimeError
+                raise commands.BadArgument(
+                    _(
+                        "Invalid value, the amount of currency to increase or decrease"
+                        " must be an integer different from zero."
+                    )
+                )
             self.sum = abs(self.sum)
-        elif argument.isdigit():
-            self.operation = "set"
         else:
-            raise RuntimeError
+            self.operation = "set"
 
 
 @cog_i18n(_)