diff --git a/src/modules/activities/components/CreateEventDialog.vue b/src/modules/activities/components/CreateEventDialog.vue
index 5f9d45b..739e300 100644
--- a/src/modules/activities/components/CreateEventDialog.vue
+++ b/src/modules/activities/components/CreateEventDialog.vue
@@ -142,8 +142,10 @@ const formSchema = toTypedSchema(
       }
       // When the price is in sats and the organizer also accepts fiat,
       // they MUST choose a settle currency. Other price denominations
-      // mirror themselves into fiat_currency automatically.
-      if (v.allow_fiat && v.currency === 'sat' && !v.fiat_currency) {
+      // mirror themselves into fiat_currency automatically. The events
+      // extension uses 'sat' and 'sats' interchangeably — accept both.
+      const isSat = v.currency === 'sat' || v.currency === 'sats'
+      if (v.allow_fiat && isSat && !v.fiat_currency) {
         ctx.addIssue({
           code: z.ZodIssueCode.custom,
           path: ['fiat_currency'],
@@ -642,7 +644,7 @@ const handleOpenChange = (open: boolean) => {
               allow-fiat-field="allow_fiat"
               fiat-currency-field="fiat_currency"
               :denomination="form.values.currency ?? 'sat'"
-              :available-fiat-currencies="availableCurrencies.filter(c => c !== 'sat')"
+              :available-fiat-currencies="availableCurrencies.filter(c => c !== 'sat' && c !== 'sats')"
               :disabled="isLoading"
             />
           </div>
diff --git a/src/modules/activities/components/PurchaseTicketDialog.vue b/src/modules/activities/components/PurchaseTicketDialog.vue
index db126cc..22eb1b8 100644
--- a/src/modules/activities/components/PurchaseTicketDialog.vue
+++ b/src/modules/activities/components/PurchaseTicketDialog.vue
@@ -66,6 +66,9 @@ const isFiatPending = ref(false)
 const fiatError = ref<string | null>(null)
 
 const canChooseFiat = computed(() => Boolean(props.event.allow_fiat))
+const isPriceInSats = computed(
+  () => props.event.currency === 'sat' || props.event.currency === 'sats',
+)
 
 // Lightning-button badge: when the price is denominated in fiat, show
 // the live sat equivalent so the buyer knows roughly what their wallet
@@ -74,7 +77,7 @@ const lightningSats = ref<number | null>(null)
 watch(
   () => [props.event.currency, props.event.price_per_ticket, props.isOpen] as const,
   async ([cur, amt, open]) => {
-    if (!open || cur === 'sat' || !amt) {
+    if (!open || !amt || cur === 'sat' || cur === 'sats') {
       lightningSats.value = null
       return
     }
@@ -97,7 +100,7 @@ const paymentMethods = computed<PaymentMethodEntry[]>(() => {
     icon: Zap,
     available: true,
     badge:
-      props.event.currency !== 'sat' && lightningSats.value
+      !isPriceInSats.value && lightningSats.value
         ? `≈ ${Math.round(lightningSats.value).toLocaleString()} sats`
         : undefined,
   }
@@ -304,7 +307,7 @@ onUnmounted(() => {
               <span class="text-sm font-medium">{{ formatEventPrice(event.price_per_ticket, event.currency) }}</span>
             </div>
             <PriceConversionPreview
-              v-if="canChooseFiat && event.currency === 'sat' && event.fiat_currency"
+              v-if="canChooseFiat && isPriceInSats && event.fiat_currency"
               :amount="event.price_per_ticket"
               from="sat"
               :to="event.fiat_currency"
diff --git a/src/modules/base/components/payments/FiatToggleField.vue b/src/modules/base/components/payments/FiatToggleField.vue
index 5ddb292..2832c9e 100644
--- a/src/modules/base/components/payments/FiatToggleField.vue
+++ b/src/modules/base/components/payments/FiatToggleField.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, watch } from 'vue'
+import { watch } from 'vue'
 import { useFormContext } from 'vee-validate'
 import {
   FormControl,
@@ -38,27 +38,31 @@ const props = defineProps<{
   disabled?: boolean
 }>()
 
-const form = useFormContext()
 const { hasAnyProvider, refresh } = useFiatProviders()
+const form = useFormContext()
 
 // Refresh once on mount so the disabled-state reflects providers the
 // user may have just configured in another tab.
 refresh()
 
-const allowFiatValue = computed(() =>
-  Boolean(form.values[props.allowFiatField as keyof typeof form.values]),
-)
-
-const showCurrencyDropdown = computed(
-  () => allowFiatValue.value && props.denomination === 'sat',
-)
+// "sat" / "sats" appear interchangeably across the LNbits events
+// extension and the webapp's currency lists — treat both as the
+// BTC-denominated case for the conditional + auto-mirror.
+function isSatDenomination(d: string): boolean {
+  return d === 'sat' || d === 'sats'
+}
 
 // When the price is denominated in a fiat currency, the rail currency
 // MUST match it — silently mirror so backend payload stays consistent.
 watch(
   () => props.denomination,
   (d) => {
-    if (d && d !== 'sat' && form.values[props.fiatCurrencyField as keyof typeof form.values] !== d) {
+    if (!form) return
+    if (
+      d &&
+      !isSatDenomination(d) &&
+      form.values[props.fiatCurrencyField as keyof typeof form.values] !== d
+    ) {
       form.setFieldValue(props.fiatCurrencyField, d)
     }
   },
@@ -67,8 +71,8 @@ watch(
 </script>
 
 <template>
-  <div class="grid grid-cols-1 sm:grid-cols-3 gap-3 items-end">
-    <FormField v-slot="{ value, handleChange }" :name="allowFiatField">
+  <FormField v-slot="{ value: allowFiat, handleChange: setAllowFiat }" :name="allowFiatField">
+    <div class="grid grid-cols-1 sm:grid-cols-3 gap-3 items-end">
       <FormItem class="sm:col-span-2 flex flex-row items-center justify-between rounded-md border p-3">
         <div class="space-y-0.5">
           <FormLabel>Also accept fiat</FormLabel>
@@ -93,35 +97,35 @@ watch(
           </TooltipProvider>
           <Switch
             v-else
-            :model-value="value as boolean"
+            :model-value="allowFiat as boolean"
             :disabled="disabled"
-            @update:model-value="handleChange"
+            @update:model-value="setAllowFiat"
           />
         </FormControl>
       </FormItem>
-    </FormField>
 
-    <FormField v-slot="{ componentField }" :name="fiatCurrencyField">
-      <FormItem v-show="showCurrencyDropdown">
-        <FormLabel>Fiat currency</FormLabel>
-        <FormControl>
-          <Select v-bind="componentField" :disabled="disabled">
-            <SelectTrigger>
-              <SelectValue placeholder="USD" />
-            </SelectTrigger>
-            <SelectContent>
-              <SelectItem
-                v-for="c in availableFiatCurrencies"
-                :key="c"
-                :value="c"
-              >
-                {{ c }}
-              </SelectItem>
-            </SelectContent>
-          </Select>
-        </FormControl>
-        <FormMessage />
-      </FormItem>
-    </FormField>
-  </div>
+      <FormField v-slot="{ componentField }" :name="fiatCurrencyField">
+        <FormItem v-show="(allowFiat as boolean) && isSatDenomination(denomination)">
+          <FormLabel>Fiat currency</FormLabel>
+          <FormControl>
+            <Select v-bind="componentField" :disabled="disabled">
+              <SelectTrigger>
+                <SelectValue placeholder="USD" />
+              </SelectTrigger>
+              <SelectContent>
+                <SelectItem
+                  v-for="c in availableFiatCurrencies"
+                  :key="c"
+                  :value="c"
+                >
+                  {{ c }}
+                </SelectItem>
+              </SelectContent>
+            </Select>
+          </FormControl>
+          <FormMessage />
+        </FormItem>
+      </FormField>
+    </div>
+  </FormField>
 </template>