diff --git a/static/js/user_expenses.js b/static/js/user_expenses.js
index 4cf695d..e9b726b 100644
--- a/static/js/user_expenses.js
+++ b/static/js/user_expenses.js
@@ -111,12 +111,14 @@ document.addEventListener("DOMContentLoaded", function () {
 
     const startDateInput = document.getElementById("startDate");
     const endDateInput = document.getElementById("endDate");
+
+    // domyslnie 1-dzis w custom zakresie
     const today = new Date();
-    const lastWeek = new Date(today);
-    lastWeek.setDate(today.getDate() - 7);
-    const formatDate = (d) => d.toISOString().split('T')[0];
-    startDateInput.value = formatDate(lastWeek);
-    endDateInput.value = formatDate(today);
+    const firstDay = new Date(today.getFullYear(), today.getMonth(), 1);
+    const lastDay = new Date(today.getFullYear(), today.getMonth() + 1, 0);
+
+    startDateInput.value = formatDate(firstDay);
+    endDateInput.value = formatDate(lastDay);
 
     loadExpenses();