diff --git a/packages/ui/src/components/billing/ServersGuestPlanModal.vue b/packages/ui/src/components/billing/ServersGuestPlanModal.vue
index 19c4e8c5e8..0781fc1c06 100644
--- a/packages/ui/src/components/billing/ServersGuestPlanModal.vue
+++ b/packages/ui/src/components/billing/ServersGuestPlanModal.vue
@@ -1,16 +1,23 @@
 <script setup lang="ts">
 import type { Labrinth } from '@modrinth/api-client'
-import { ChevronRightIcon } from '@modrinth/assets'
+import { ChevronRightIcon, ExternalIcon, XIcon } from '@modrinth/assets'
 import { computed, ref, useTemplateRef } from 'vue'
 
+import ButtonStyled from '../base/ButtonStyled.vue'
 import NewModal from '../modal/NewModal.vue'
 import type { ServerBillingInterval } from './ModrinthServersPurchaseModal.vue'
 import PlanSelector from './ServersPurchase0Plan.vue'
 
-const props = defineProps<{
-	availableProducts: Labrinth.Billing.Internal.Product[]
-	currency: string
-}>()
+const props = withDefaults(
+	defineProps<{
+		availableProducts: Labrinth.Billing.Internal.Product[]
+		currency: string
+		loggedIn?: boolean
+	}>(),
+	{
+		loggedIn: false,
+	},
+)
 
 const emit = defineEmits<{
 	(e: 'continue', payload: { interval: ServerBillingInterval; planId: string | null }): void
@@ -20,6 +27,7 @@ const modal = useTemplateRef<InstanceType<typeof NewModal>>('modal')
 
 const selectedPlan = ref<Labrinth.Billing.Internal.Product>()
 const selectedInterval = ref<ServerBillingInterval>('quarterly')
+const showSignInPrompt = ref(false)
 
 const defaultPlan = computed<Labrinth.Billing.Internal.Product | undefined>(() => {
 	return (
@@ -29,11 +37,20 @@ const defaultPlan = computed<Labrinth.Billing.Internal.Product | undefined>(() =
 	)
 })
 
-function continueWithSelection() {
+function emitSelection() {
 	emit('continue', {
 		interval: selectedInterval.value,
 		planId: selectedPlan.value?.id ?? null,
 	})
+}
+
+function continueWithSelection() {
+	if (!props.loggedIn) {
+		showSignInPrompt.value = true
+		return
+	}
+
+	emitSelection()
 	modal.value?.hide()
 }
 
@@ -41,7 +58,22 @@ function chooseCustom() {
 	selectedPlan.value = undefined
 }
 
+function closeSignInPrompt() {
+	showSignInPrompt.value = false
+}
+
+function continueToAuth() {
+	emitSelection()
+	closeSignInPrompt()
+	modal.value?.hide()
+}
+
+function handleModalHide() {
+	closeSignInPrompt()
+}
+
 function show(initialInterval?: ServerBillingInterval, initialPlanId?: string | null) {
+	closeSignInPrompt()
 	selectedInterval.value = initialInterval ?? 'quarterly'
 	if (initialPlanId === null) {
 		selectedPlan.value = undefined
@@ -59,7 +91,7 @@ defineExpose({
 </script>
 
 <template>
-	<NewModal ref="modal">
+	<NewModal ref="modal" :on-hide="handleModalHide" no-padding>
 		<template #title>
 			<div class="flex items-center gap-1 font-bold text-secondary">
 				<span class="text-contrast">Plan</span>
@@ -71,15 +103,66 @@ defineExpose({
 				<span class=""> Review </span>
 			</div>
 		</template>
-		<div class="w-[56rem] max-w-full">
-			<PlanSelector
-				v-model:plan="selectedPlan"
-				v-model:interval="selectedInterval"
-				:available-products="availableProducts"
-				:currency="currency"
-				@choose-custom="chooseCustom"
-				@proceed="continueWithSelection"
-			/>
+		<div class="relative w-[56rem] max-w-full">
+			<div class="w-full h-full p-6">
+				<PlanSelector
+					v-model:plan="selectedPlan"
+					v-model:interval="selectedInterval"
+					:available-products="availableProducts"
+					:currency="currency"
+					@choose-custom="chooseCustom"
+					@proceed="continueWithSelection"
+				/>
+			</div>
+
+			<Transition
+				enter-active-class="transition-opacity duration-150 ease-out"
+				enter-from-class="opacity-0"
+				enter-to-class="opacity-100"
+				leave-active-class="transition-opacity duration-150 ease-in"
+				leave-from-class="opacity-100"
+				leave-to-class="opacity-0"
+			>
+				<div
+					v-if="showSignInPrompt"
+					class="pointer-events-auto absolute inset-0 z-20 rounded-lg bg-black/55"
+				/>
+			</Transition>
+
+			<Transition
+				enter-active-class="transition-all duration-200 ease-out"
+				enter-from-class="translate-y-4 opacity-0"
+				enter-to-class="translate-y-0 opacity-100"
+				leave-active-class="transition-all duration-150 ease-in"
+				leave-from-class="translate-y-0 opacity-100"
+				leave-to-class="translate-y-4 opacity-0"
+			>
+				<div
+					v-if="showSignInPrompt"
+					class="absolute inset-x-0 bottom-0 -m-px z-30 rounded-2xl border border-solid border-surface-5 bg-bg-raised p-6 shadow-2xl"
+				>
+					<div class="absolute right-4 top-4">
+						<ButtonStyled circular type="transparent">
+							<button aria-label="Close sign in prompt" @click="closeSignInPrompt">
+								<XIcon />
+							</button>
+						</ButtonStyled>
+					</div>
+
+					<div class="mx-auto flex max-w-xl flex-col items-center gap-4 text-center">
+						<div class="flex flex-col gap-2">
+							<div class="font-semibold text-contrast">Sign in to continue your purchase</div>
+							<div class="">You need a Modrinth account to add your billing details.</div>
+						</div>
+						<ButtonStyled color="brand" class="mt-2">
+							<button @click="continueToAuth">
+								Sign in or create an account
+								<ExternalIcon class="size-4" />
+							</button>
+						</ButtonStyled>
+					</div>
+				</div>
+			</Transition>
 		</div>
 	</NewModal>
 </template>
diff --git a/packages/ui/src/layouts/wrapped/hosting/manage/index.vue b/packages/ui/src/layouts/wrapped/hosting/manage/index.vue
index 0ba4eca69a..0ca04b2ce6 100644
--- a/packages/ui/src/layouts/wrapped/hosting/manage/index.vue
+++ b/packages/ui/src/layouts/wrapped/hosting/manage/index.vue
@@ -8,6 +8,7 @@
 			ref="guestPlanModal"
 			:available-products="pyroProducts"
 			:currency="selectedCurrency"
+			:logged-in="loggedIn"
 			@continue="handleGuestPlanContinue"
 		/>
 		<ModrinthServersPurchaseModal