diff --git a/modules/services/window-managers/i3-sway/lib/functions.nix b/modules/services/window-managers/i3-sway/lib/functions.nix
index c6a6ada1..4395f38b 100644
--- a/modules/services/window-managers/i3-sway/lib/functions.nix
+++ b/modules/services/window-managers/i3-sway/lib/functions.nix
@@ -69,8 +69,8 @@ rec {
     };
 
   barStr = { id, fonts, mode, hiddenState, position, workspaceButtons
-    , workspaceNumbers, command, statusCommand, colors, trayOutput, extraConfig
-    , ... }:
+    , workspaceNumbers, command, statusCommand, colors, trayOutput, trayPadding
+    , extraConfig, ... }:
     let colorsNotNull = lib.filterAttrs (n: v: v != null) colors != { };
     in ''
       bar {
@@ -93,6 +93,8 @@ rec {
                   lib.hm.booleans.yesNo (!workspaceNumbers)
                 }")
               (optionalString (trayOutput != null) "tray_output ${trayOutput}")
+              (optionalString (trayPadding != null)
+                "tray_padding ${toString trayPadding}")
               (optionals colorsNotNull (indent
                 (lists.subtractLists [ "" null ] [
                   "colors {"
diff --git a/modules/services/window-managers/i3-sway/lib/options.nix b/modules/services/window-managers/i3-sway/lib/options.nix
index 3fe0b755..0cbea642 100644
--- a/modules/services/window-managers/i3-sway/lib/options.nix
+++ b/modules/services/window-managers/i3-sway/lib/options.nix
@@ -293,6 +293,15 @@ let
         default = "primary";
         description = "Where to output tray.";
       };
+
+      trayPadding = mkNullableOption {
+        type = types.int;
+        default = null;
+        description = ''
+          Sets the pixel padding of the system tray.
+          This padding will surround the tray on all sides and between each item.
+        '';
+      };
     };
   };