diff --git a/OpenRA.Mods.Common/Traits/Buildings/Refinery.cs b/OpenRA.Mods.Common/Traits/Buildings/Refinery.cs
index 503037acbf..57991cb696 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/Refinery.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/Refinery.cs
@@ -52,11 +52,13 @@ namespace OpenRA.Mods.Common.Traits
 		public virtual object Create(ActorInitializer init) { return new Refinery(init.Self, this); }
 	}
 
-	public class Refinery : ITick, IAcceptResources, INotifySold, INotifyCapture, INotifyOwnerChanged, ISync, INotifyActorDisposing
+	public class Refinery : INotifyCreated, ITick, IAcceptResources, INotifySold, INotifyCapture,
+		INotifyOwnerChanged, ISync, INotifyActorDisposing
 	{
 		readonly Actor self;
 		readonly RefineryInfo info;
 		PlayerResources playerResources;
+		RefineryResourceMultiplier[] resourceMultipliers;
 
 		int currentDisplayTick = 0;
 		int currentDisplayValue = 0;
@@ -79,6 +81,11 @@ namespace OpenRA.Mods.Common.Traits
 			currentDisplayTick = info.TickRate;
 		}
 
+		void INotifyCreated.Created(Actor self)
+		{
+			resourceMultipliers = self.TraitsImplementing<RefineryResourceMultiplier>().ToArray();
+		}
+
 		public virtual Activity DockSequence(Actor harv, Actor self)
 		{
 			return new SpriteHarvesterDockSequence(harv, self, DeliveryAngle, IsDragRequired, DragOffset, DragLength);
@@ -94,6 +101,8 @@ namespace OpenRA.Mods.Common.Traits
 
 		public void GiveResource(int amount)
 		{
+			amount = Util.ApplyPercentageModifiers(amount, resourceMultipliers.Select(m => m.GetModifier()));
+
 			if (info.UseStorage)
 			{
 				if (info.DiscardExcessResources)
diff --git a/OpenRA.Mods.Common/Traits/Multipliers/RefineryResourceMultiplier.cs b/OpenRA.Mods.Common/Traits/Multipliers/RefineryResourceMultiplier.cs
new file mode 100644
index 0000000000..556ecf3a10
--- /dev/null
+++ b/OpenRA.Mods.Common/Traits/Multipliers/RefineryResourceMultiplier.cs
@@ -0,0 +1,33 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2019 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Modifies the bale values delivered to this refinery.")]
+	public class RefineryResourceMultiplierInfo : ConditionalTraitInfo
+	{
+		[FieldLoader.Require]
+		[Desc("Percentage modifier to apply.")]
+		public readonly int Modifier = 100;
+
+		public override object Create(ActorInitializer init) { return new RefineryResourceMultiplier(this); }
+	}
+
+	public class RefineryResourceMultiplier : ConditionalTrait<RefineryResourceMultiplierInfo>, Requires<RefineryInfo>
+	{
+		public RefineryResourceMultiplier(RefineryResourceMultiplierInfo info)
+			: base(info) { }
+
+		public int GetModifier() { return IsTraitDisabled ? 100 : Info.Modifier; }
+	}
+}