diff --git a/src/Bank.cpp b/src/Bank.cpp
index ea5d8c2..048e382 100644
--- a/src/Bank.cpp
+++ b/src/Bank.cpp
@@ -25,4 +25,8 @@ int Bank::getMoney() {
 
 void Bank::updateMoney() {
     money = std::round(money * (1+tax));
+}
+
+void Bank::setTax(double value) {
+    tax = value;
 }
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