diff --git a/src/components/ReservationModal.tsx b/src/components/ReservationModal.tsx
index 39c6b29..922f490 100644
--- a/src/components/ReservationModal.tsx
+++ b/src/components/ReservationModal.tsx
@@ -4,7 +4,11 @@ import { useNavigate } from "react-router-dom";
 import { Cafe } from "../services/campaignApi";
 import { chargePageUrl, createCharge } from "../services/ipgApi";
 import { fetchWalletBalances } from "../services/walletApi";
-import { toEnglishDigits, toPersianDigits, formatPersianNumber } from "../utils/formatNumber";
+import {
+  toEnglishDigits,
+  toPersianDigits,
+  formatPersianNumber,
+} from "../utils/formatNumber";
 import { toE164 } from "../utils/phone";
 import { setPendingReservation } from "../utils/pendingReservation";
 import { getUserPhone } from "../utils/userPhone";
@@ -39,6 +43,8 @@ function PaymentRow({
   bottomBorder?: boolean;
   infoIconParam?: boolean;
 }) {
+  const [showInfo, setShowInfo] = useState(false);
+
   return (
     <div
       className={`flex items-center justify-between py-3 ${bottomBorder ? "border-b border-gray-100" : ""}`}
@@ -52,7 +58,14 @@ function PaymentRow({
           {label}
         </span>
         {infoIconParam && (
-          <Icon name="info" className="h-5 w-5 shrink-0 text-[#376195]" />
+          <button
+            type="button"
+            onClick={() => setShowInfo(true)}
+            className="shrink-0"
+            aria-label="توضیحات کارمزد"
+          >
+            <Icon name="info" className="h-5 w-5 text-[#376195]" />
+          </button>
         )}
       </div>
       <span
@@ -60,6 +73,31 @@ function PaymentRow({
       >
         {formatPersianNumber(amount)} تومان
       </span>
+
+      {showInfo &&
+        createPortal(
+          <>
+            <div
+              className="fixed inset-0 z-9998 bg-black/40"
+              onClick={() => setShowInfo(false)}
+            />
+            <div className="fixed inset-x-6 top-1/2 z-9999 -translate-y-1/2 rounded-2xl bg-white px-5 py-5 shadow-xl">
+              <button
+                type="button"
+                onClick={() => setShowInfo(false)}
+                className="absolute left-4 top-4 flex h-7 w-7 items-center justify-center text-gray-400 hover:text-gray-600"
+                aria-label="بستن"
+              >
+                ✕
+              </button>
+              <p className="pt-4 text-right text-sm leading-7 text-gray-800">
+                مطابق مقررات نظام مالیاتی کشور، کارمزد درگاه پرداخت در تمامی
+                درگاه‌های پرداخت اعمال می‌شود.
+              </p>
+            </div>
+          </>,
+          document.body,
+        )}
     </div>
   );
 }
@@ -182,14 +220,19 @@ export default function ReservationModal({
             <input
               type="text"
               value={fullName}
-              onChange={(e) => { setFullName(e.target.value); clearFieldError("name"); }}
+              onChange={(e) => {
+                setFullName(e.target.value);
+                clearFieldError("name");
+              }}
               placeholder="نام و نام خانوادگی"
               className={`w-full rounded-2xl border px-4 py-3 text-right placeholder:font-light placeholder:text-[#999999] ${
                 fieldErrors.name ? "border-red-400" : "border-gray-200"
               }`}
             />
             {fieldErrors.name && (
-              <p className="mt-1 text-right text-sm text-red-500">{fieldErrors.name}</p>
+              <p className="mt-1 text-right text-sm text-red-500">
+                {fieldErrors.name}
+              </p>
             )}
           </div>
 
@@ -203,7 +246,9 @@ export default function ReservationModal({
               inputMode="numeric"
               value={phone}
               onChange={(e) => {
-                const digits = toEnglishDigits(e.target.value).replace(/\D/g, "").slice(0, 11);
+                const digits = toEnglishDigits(e.target.value)
+                  .replace(/\D/g, "")
+                  .slice(0, 11);
                 setPhone(toPersianDigits(digits));
                 clearFieldError("phone");
               }}
@@ -213,7 +258,9 @@ export default function ReservationModal({
               }`}
             />
             {fieldErrors.phone && (
-              <p className="mt-1 text-right text-sm text-red-500">{fieldErrors.phone}</p>
+              <p className="mt-1 text-right text-sm text-red-500">
+                {fieldErrors.phone}
+              </p>
             )}
           </div>
 
@@ -242,10 +289,14 @@ export default function ReservationModal({
               </span>
               <button
                 type="button"
-                onClick={() => setCount((prev) => Math.min(remainingTickets, prev + 1))}
+                onClick={() =>
+                  setCount((prev) => Math.min(remainingTickets, prev + 1))
+                }
                 disabled={atMaxCount}
                 className={`flex h-6 w-6 items-center justify-center ${
-                  atMaxCount ? "cursor-not-allowed text-[#999999]" : "text-[#223D5D]"
+                  atMaxCount
+                    ? "cursor-not-allowed text-[#999999]"
+                    : "text-[#223D5D]"
                 }`}
               >
                 <Icon name="plus" className="h-4 w-4" />