diff --git a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/MemberPriceModal/index.tsx b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/MemberPriceModal/index.tsx
similarity index 100%
rename from apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/MemberPriceModal/index.tsx
rename to apps/scandic-web/components/HotelReservation/EnterDetails/Details/MemberPriceModal/index.tsx
diff --git a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/MemberPriceModal/modal.module.css b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/MemberPriceModal/modal.module.css
similarity index 100%
rename from apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/MemberPriceModal/modal.module.css
rename to apps/scandic-web/components/HotelReservation/EnterDetails/Details/MemberPriceModal/modal.module.css
diff --git a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/Multiroom/JoinScandicFriendsCard/index.tsx b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/Multiroom/JoinScandicFriendsCard/index.tsx
index b72122485..ed020cbfb 100644
--- a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/Multiroom/JoinScandicFriendsCard/index.tsx
+++ b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/Multiroom/JoinScandicFriendsCard/index.tsx
@@ -1,5 +1,6 @@
 "use client"
 
+import { useState } from "react"
 import { useIntl } from "react-intl"
 
 import { MaterialIcon } from "@scandic-hotels/design-system/Icons/MaterialIcon"
@@ -9,6 +10,8 @@ import Caption from "@/components/TempDesignSystem/Text/Caption"
 import { useRoomContext } from "@/contexts/Details/Room"
 import { formatPrice } from "@/utils/numberFormatting"
 
+import MemberPriceModal from "../../MemberPriceModal"
+
 import styles from "./joinScandicFriendsCard.module.css"
 
 import type { JoinScandicFriendsCardProps } from "@/types/components/hotelReservation/enterDetails/details"
@@ -18,7 +21,19 @@ export default function JoinScandicFriendsCard({
   name = "join",
 }: JoinScandicFriendsCardProps) {
   const intl = useIntl()
-  const { room, roomNr } = useRoomContext()
+  const {
+    room,
+    roomNr,
+    actions: { updateJoin },
+  } = useRoomContext()
+  const [isMemberPriceModalOpen, setIsMemberPriceModalOpen] = useState(false)
+
+  function onChange(event: { target: { value: boolean } }) {
+    updateJoin(event.target.value)
+    if (event.target.value) {
+      setIsMemberPriceModalOpen(true)
+    }
+  }
 
   if (!("member" in room.roomRate) || !room.roomRate.member) {
     return null
@@ -58,7 +73,11 @@ export default function JoinScandicFriendsCard({
 
   return (
     <div className={styles.cardContainer}>
-      <Checkbox name={name} className={styles.checkBox}>
+      <Checkbox
+        name={name}
+        className={styles.checkBox}
+        registerOptions={{ onChange, value: room.guest.join }}
+      >
         <div>
           <Caption type="label" textTransform="uppercase" color="red">
             {saveOnJoiningLabel}
@@ -88,6 +107,10 @@ export default function JoinScandicFriendsCard({
           </Caption>
         ))}
       </div>
+      <MemberPriceModal
+        isOpen={isMemberPriceModalOpen}
+        setIsOpen={setIsMemberPriceModalOpen}
+      />
     </div>
   )
 }
diff --git a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/JoinScandicFriendsCard/index.tsx b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/JoinScandicFriendsCard/index.tsx
index 556e6c2cf..fa6613c70 100644
--- a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/JoinScandicFriendsCard/index.tsx
+++ b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/JoinScandicFriendsCard/index.tsx
@@ -1,5 +1,6 @@
 "use client"
 
+import { useState } from "react"
 import { useIntl } from "react-intl"
 
 import { MaterialIcon } from "@scandic-hotels/design-system/Icons/MaterialIcon"
@@ -15,6 +16,8 @@ import { useRoomContext } from "@/contexts/Details/Room"
 import useLang from "@/hooks/useLang"
 import { formatPrice } from "@/utils/numberFormatting"
 
+import MemberPriceModal from "../../MemberPriceModal"
+
 import styles from "./joinScandicFriendsCard.module.css"
 
 import type { JoinScandicFriendsCardProps } from "@/types/components/hotelReservation/enterDetails/details"
@@ -25,7 +28,18 @@ export default function JoinScandicFriendsCard({
 }: JoinScandicFriendsCardProps) {
   const lang = useLang()
   const intl = useIntl()
-  const { room } = useRoomContext()
+  const {
+    room,
+    actions: { updateJoin },
+  } = useRoomContext()
+  const [isMemberPriceModalOpen, setIsMemberPriceModalOpen] = useState(false)
+
+  function onChange(event: { target: { value: boolean } }) {
+    updateJoin(event.target.value)
+    if (event.target.value) {
+      setIsMemberPriceModalOpen(true)
+    }
+  }
 
   if (!("member" in room.roomRate) || !room.roomRate.member) {
     return null
@@ -64,7 +78,11 @@ export default function JoinScandicFriendsCard({
 
   return (
     <div className={styles.cardContainer}>
-      <Checkbox name={name} className={styles.checkBox}>
+      <Checkbox
+        name={name}
+        className={styles.checkBox}
+        registerOptions={{ onChange }}
+      >
         <div>
           <Caption type="label" textTransform="uppercase" color="red">
             {saveOnJoiningLabel}
@@ -138,6 +156,10 @@ export default function JoinScandicFriendsCard({
           )}
         </Footnote>
       </div>
+      <MemberPriceModal
+        isOpen={isMemberPriceModalOpen}
+        setIsOpen={setIsMemberPriceModalOpen}
+      />
     </div>
   )
 }
diff --git a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/index.tsx b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/index.tsx
index 64bb00b6f..75b0a1915 100644
--- a/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/index.tsx
+++ b/apps/scandic-web/components/HotelReservation/EnterDetails/Details/RoomOne/index.tsx
@@ -1,6 +1,6 @@
 "use client"
 import { zodResolver } from "@hookform/resolvers/zod"
-import { useCallback, useState } from "react"
+import { useCallback } from "react"
 import { FormProvider, useForm } from "react-hook-form"
 import { useIntl } from "react-intl"
 
@@ -17,7 +17,6 @@ import { useRoomContext } from "@/contexts/Details/Room"
 import { trackPaymentSectionOpen } from "@/utils/tracking/booking"
 
 import JoinScandicFriendsCard from "./JoinScandicFriendsCard"
-import MemberPriceModal from "./MemberPriceModal"
 import { guestDetailsSchema, signedInDetailsSchema } from "./schema"
 import Signup from "./Signup"
 
@@ -31,7 +30,6 @@ import type {
 const formID = "enter-details"
 export default function Details({ user }: DetailsProps) {
   const intl = useIntl()
-  const [isMemberPriceModalOpen, setIsMemberPriceModalOpen] = useState(false)
 
   const { canProceedToPayment, lastRoom, isMultiRoom } = useEnterDetailsStore(
     (state) => ({
@@ -76,12 +74,9 @@ export default function Details({ user }: DetailsProps) {
 
   const onSubmit = useCallback(
     (values: DetailsSchema) => {
-      if ((values.join || values.membershipNo) && memberRate && !user) {
-        setIsMemberPriceModalOpen(true)
-      }
       updateDetails(values)
     },
-    [updateDetails, setIsMemberPriceModalOpen, memberRate, user]
+    [updateDetails]
   )
 
   return (
@@ -187,10 +182,6 @@ export default function Details({ user }: DetailsProps) {
             </Button>
           </footer>
         ) : null}
-        <MemberPriceModal
-          isOpen={isMemberPriceModalOpen}
-          setIsOpen={setIsMemberPriceModalOpen}
-        />
       </form>
     </FormProvider>
   )
diff --git a/apps/scandic-web/stores/enter-details/index.ts b/apps/scandic-web/stores/enter-details/index.ts
index 648643326..871c93e23 100644
--- a/apps/scandic-web/stores/enter-details/index.ts
+++ b/apps/scandic-web/stores/enter-details/index.ts
@@ -223,6 +223,40 @@ export function createDetailsStore(
               })
             )
           },
+          updateJoin(join) {
+            return set(
+              produce((state: DetailsState) => {
+                const currentRoom = state.rooms[idx].room
+
+                currentRoom.guest.join = join
+
+                if (join) {
+                  currentRoom.guest.membershipNo = undefined
+                }
+
+                currentRoom.roomPrice = getRoomPrice(
+                  currentRoom.roomRate,
+                  Boolean(
+                    join ||
+                      currentRoom.guest.membershipNo ||
+                      (idx === 0 && isMember)
+                  )
+                )
+
+                const nights = dt(state.booking.toDate).diff(
+                  state.booking.fromDate,
+                  "days"
+                )
+
+                state.totalPrice = calcTotalPrice(
+                  state.rooms,
+                  state.totalPrice.local.currency,
+                  isMember,
+                  nights
+                )
+              })
+            )
+          },
           updateDetails(data) {
             return set(
               produce((state: DetailsState) => {
@@ -281,56 +315,6 @@ export function createDetailsStore(
                   state.rooms[idx].isComplete = true
                 }
 
-                writeToSessionStorage({
-                  booking: state.booking,
-                  rooms: state.rooms,
-                })
-              })
-            )
-          },
-          updateMultiroomDetails(data) {
-            return set(
-              produce((state: DetailsState) => {
-                state.rooms[idx].steps[StepEnum.details].isValid = true
-
-                state.rooms[idx].room.guest.countryCode = data.countryCode
-                state.rooms[idx].room.guest.email = data.email
-                state.rooms[idx].room.guest.firstName = data.firstName
-                state.rooms[idx].room.guest.join = data.join
-                state.rooms[idx].room.guest.lastName = data.lastName
-
-                if (data.join) {
-                  state.rooms[idx].room.guest.membershipNo = undefined
-                } else {
-                  state.rooms[idx].room.guest.membershipNo = data.membershipNo
-                }
-                state.rooms[idx].room.guest.phoneNumber = data.phoneNumber
-
-                const getMemberPrice = Boolean(data.join || data.membershipNo)
-                state.rooms[idx].room.roomPrice = getRoomPrice(
-                  state.rooms[idx].room.roomRate,
-                  getMemberPrice
-                )
-
-                const nights = dt(state.booking.toDate).diff(
-                  state.booking.fromDate,
-                  "days"
-                )
-
-                state.totalPrice = calcTotalPrice(
-                  state.rooms,
-                  state.totalPrice.local.currency,
-                  getMemberPrice,
-                  nights
-                )
-
-                const isAllStepsCompleted = checkRoomProgress(
-                  state.rooms[idx].steps
-                )
-                if (isAllStepsCompleted) {
-                  state.rooms[idx].isComplete = true
-                }
-
                 writeToSessionStorage({
                   booking: state.booking,
                   rooms: state.rooms,
diff --git a/apps/scandic-web/types/contexts/details/room.ts b/apps/scandic-web/types/contexts/details/room.ts
index 453e8604a..5222b387c 100644
--- a/apps/scandic-web/types/contexts/details/room.ts
+++ b/apps/scandic-web/types/contexts/details/room.ts
@@ -7,6 +7,7 @@ export interface RoomContextValue {
   actions: {
     updateBedType: (data: BedTypeSchema) => void
     updateBreakfast: (data: BreakfastPackage | false) => void
+    updateJoin: (join: boolean) => void
     updateDetails: (data: DetailsSchema) => void
   }
   isComplete: RoomState["isComplete"]
diff --git a/apps/scandic-web/types/stores/enter-details.ts b/apps/scandic-web/types/stores/enter-details.ts
index b5f5118ae..f35a2bc6d 100644
--- a/apps/scandic-web/types/stores/enter-details.ts
+++ b/apps/scandic-web/types/stores/enter-details.ts
@@ -61,8 +61,8 @@ export interface RoomState {
   actions: {
     updateBedType: (data: BedTypeSchema) => void
     updateBreakfast: (data: BreakfastPackage | false) => void
+    updateJoin: (join: boolean) => void
     updateDetails: (data: DetailsSchema) => void
-    updateMultiroomDetails: (data: MultiroomDetailsSchema) => void
   }
   isComplete: boolean
   room: Room