diff --git a/src/js/economyJS.js b/src/js/economyJS.js
index 865263db9e7102242695a8435959f016e67c76a8..175b9620a6040975a935b01afda01ffc01a992f3 100644
--- a/src/js/economyJS.js
+++ b/src/js/economyJS.js
@@ -583,7 +583,7 @@ globalThis.calculateCosts = (function() {
 	}
 
 	function getIncubatorSlavesCosts() {
-		const facIncMultiplier = V.facilityCost * V.incubator;
+		const facIncMultiplier = V.facilityCost * V.tanks.length;
 		let costs = (facIncMultiplier * 10);
 		costs += (0.2 * V.incubatorUpgradeWeight + 0.2 * V.incubatorUpgradeMuscles +
 			0.2 * V.incubatorUpgradeReproduction + 0.2 * V.incubatorUpgradeGrowthStims +