diff --git a/src/components/sales-stats/PeriodSelector.tsx b/src/components/sales-stats/PeriodSelector.tsx
index 35eff18..c55874a 100644
--- a/src/components/sales-stats/PeriodSelector.tsx
+++ b/src/components/sales-stats/PeriodSelector.tsx
@@ -2,6 +2,7 @@ import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
 
 import { SALES_STATS } from '../../constants/salesStats';
+import { getMonthToDateRange, isMonthToDate } from '../../utils/period';
 
 interface PeriodSelectorProps {
   value: { days?: number; startDate?: string; endDate?: string };
@@ -24,46 +25,44 @@ export function PeriodSelector({ value, onChange }: PeriodSelectorProps) {
     onChange({ days });
   };
 
-  const handleCustomToggle = () => {
-    setShowCustom((prev) => !prev);
+  const handleThisMonth = () => {
+    setShowCustom(false);
+    onChange({ days: undefined, ...getMonthToDateRange() });
   };
 
+  const handleCustomToggle = () => setShowCustom((prev) => !prev);
+
   const handleDateChange = (field: 'startDate' | 'endDate', dateStr: string) => {
-    onChange({
-      ...value,
-      days: undefined,
-      [field]: dateStr,
-    });
+    onChange({ ...value, days: undefined, [field]: dateStr });
   };
 
-  const isPresetActive = (days: number) => !showCustom && value.days === days;
+  const buttonClass = (active: boolean) =>
+    `rounded-lg px-3 py-1.5 text-sm font-medium transition-colors ${
+      active
+        ? 'bg-accent-500/20 text-accent-400'
+        : 'bg-dark-800/50 text-dark-400 hover:bg-dark-700/50 hover:text-dark-300'
+    }`;
+
+  const mtdActive = !showCustom && isMonthToDate(value);
 
   return (
     <div className="flex flex-wrap items-center gap-2">
+      <button type="button" onClick={handleThisMonth} className={buttonClass(mtdActive)}>
+        {t('admin.salesStats.period.thisMonth')}
+      </button>
+
       {SALES_STATS.PERIOD_PRESETS.map((days) => (
         <button
           key={days}
           type="button"
           onClick={() => handlePreset(days)}
-          className={`rounded-lg px-3 py-1.5 text-sm font-medium transition-colors ${
-            isPresetActive(days)
-              ? 'bg-accent-500/20 text-accent-400'
-              : 'bg-dark-800/50 text-dark-400 hover:bg-dark-700/50 hover:text-dark-300'
-          }`}
+          className={buttonClass(!showCustom && value.days === days)}
         >
           {presetLabels[days]}
         </button>
       ))}
 
-      <button
-        type="button"
-        onClick={handleCustomToggle}
-        className={`rounded-lg px-3 py-1.5 text-sm font-medium transition-colors ${
-          showCustom
-            ? 'bg-accent-500/20 text-accent-400'
-            : 'bg-dark-800/50 text-dark-400 hover:bg-dark-700/50 hover:text-dark-300'
-        }`}
-      >
+      <button type="button" onClick={handleCustomToggle} className={buttonClass(showCustom)}>
         {t('admin.salesStats.period.custom')}
       </button>
 
@@ -75,7 +74,7 @@ export function PeriodSelector({ value, onChange }: PeriodSelectorProps) {
             onChange={(e) => handleDateChange('startDate', e.target.value)}
             className="rounded-lg border border-dark-600 bg-dark-800 px-2 py-1 text-sm text-dark-200"
           />
-          <span className="text-dark-500">{'\u2014'}</span>
+          <span className="text-dark-500">{'—'}</span>
           <input
             type="date"
             value={value.endDate || ''}
diff --git a/src/locales/en.json b/src/locales/en.json
index d29d7fa..c14df7d 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -1282,6 +1282,7 @@
       "title": "Sales Statistics",
       "subtitle": "Revenue, trials, subscriptions, and renewals",
       "period": {
+        "thisMonth": "This month",
         "week": "7 days",
         "month": "30 days",
         "quarter": "90 days",
diff --git a/src/locales/fa.json b/src/locales/fa.json
index ac32a24..f84cde8 100644
--- a/src/locales/fa.json
+++ b/src/locales/fa.json
@@ -1155,6 +1155,7 @@
       "title": "آمار فروش",
       "subtitle": "درآمد، آزمایشی، اشتراک و تمدید",
       "period": {
+        "thisMonth": "این ماه",
         "week": "۷ روز",
         "month": "۳۰ روز",
         "quarter": "۹۰ روز",
diff --git a/src/locales/ru.json b/src/locales/ru.json
index 5e95ba5..8c18e60 100644
--- a/src/locales/ru.json
+++ b/src/locales/ru.json
@@ -1304,6 +1304,7 @@
       "title": "Статистика продаж",
       "subtitle": "Доход, триалы, подписки и продления",
       "period": {
+        "thisMonth": "Этот месяц",
         "week": "7 дней",
         "month": "30 дней",
         "quarter": "90 дней",
diff --git a/src/locales/zh.json b/src/locales/zh.json
index 69ffe95..68c6184 100644
--- a/src/locales/zh.json
+++ b/src/locales/zh.json
@@ -1155,6 +1155,7 @@
       "title": "销售统计",
       "subtitle": "收入、试用、订阅和续订",
       "period": {
+        "thisMonth": "本月",
         "week": "7天",
         "month": "30天",
         "quarter": "90天",
diff --git a/src/pages/AdminSalesStats.tsx b/src/pages/AdminSalesStats.tsx
index 89af97a..f1eec3d 100644
--- a/src/pages/AdminSalesStats.tsx
+++ b/src/pages/AdminSalesStats.tsx
@@ -6,6 +6,7 @@ import type { SalesStatsParams } from '../api/adminSalesStats';
 import { salesStatsApi } from '../api/adminSalesStats';
 import { SALES_STATS } from '../constants/salesStats';
 import { useCurrency } from '../hooks/useCurrency';
+import { getMonthToDateRange } from '../utils/period';
 import { AdminBackButton } from '../components/admin/AdminBackButton';
 import {
   BanknotesIcon,
@@ -72,7 +73,7 @@ export default function AdminSalesStats() {
     days?: number;
     startDate?: string;
     endDate?: string;
-  }>({ days: SALES_STATS.DEFAULT_PERIOD });
+  }>(() => getMonthToDateRange());
 
   const params: SalesStatsParams = useMemo(
     () => ({
diff --git a/src/utils/period.ts b/src/utils/period.ts
new file mode 100644
index 0000000..7032556
--- /dev/null
+++ b/src/utils/period.ts
@@ -0,0 +1,22 @@
+/** First day of the current month → today, as local YYYY-MM-DD strings.
+ * Used as the default sales-stats window ("this month so far"). */
+export function getMonthToDateRange(): { startDate: string; endDate: string } {
+  const now = new Date();
+  const toLocalISODate = (d: Date) =>
+    `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
+  return {
+    startDate: toLocalISODate(new Date(now.getFullYear(), now.getMonth(), 1)),
+    endDate: toLocalISODate(now),
+  };
+}
+
+/** True when the period is exactly "from the 1st of the current month to today". */
+export function isMonthToDate(period: {
+  days?: number;
+  startDate?: string;
+  endDate?: string;
+}): boolean {
+  if (period.days !== undefined) return false;
+  const mtd = getMonthToDateRange();
+  return period.startDate === mtd.startDate && period.endDate === mtd.endDate;
+}