diff --git a/src/food-market.api/Controllers/Organizations/OrganizationSettingsController.cs b/src/food-market.api/Controllers/Organizations/OrganizationSettingsController.cs
index 1a8d102..c7368b8 100644
--- a/src/food-market.api/Controllers/Organizations/OrganizationSettingsController.cs
+++ b/src/food-market.api/Controllers/Organizations/OrganizationSettingsController.cs
@@ -32,10 +32,10 @@ public record OrgSettingsDto(
         decimal VatRate,
         bool ShowVatEnabledOnProduct);
 
+    // DefaultCurrencyId не принимается — он read-only, выводится из страны (Country.DefaultCurrencyId).
     public record OrgSettingsInput(
         string Name,
         string CountryCode,
-        Guid? DefaultCurrencyId,
         bool MultiCurrencyEnabled,
         bool ShowVatEnabledOnProduct);
 
@@ -62,7 +62,11 @@ public async Task<ActionResult<OrgSettingsDto>> Update([FromBody] OrgSettingsInp
 
         o.Name = input.Name;
         o.CountryCode = input.CountryCode;
-        o.DefaultCurrencyId = input.DefaultCurrencyId;
+        // Валюта организации жёстко следует за страной — не принимается от клиента.
+        o.DefaultCurrencyId = await _db.Countries
+            .Where(c => c.Code == input.CountryCode)
+            .Select(c => c.DefaultCurrencyId)
+            .FirstOrDefaultAsync(ct);
         o.MultiCurrencyEnabled = input.MultiCurrencyEnabled;
         o.ShowVatEnabledOnProduct = input.ShowVatEnabledOnProduct;
         await _db.SaveChangesAsync(ct);
diff --git a/src/food-market.web/src/pages/OrganizationSettingsPage.tsx b/src/food-market.web/src/pages/OrganizationSettingsPage.tsx
index 5dc5aea..5569c71 100644
--- a/src/food-market.web/src/pages/OrganizationSettingsPage.tsx
+++ b/src/food-market.web/src/pages/OrganizationSettingsPage.tsx
@@ -5,31 +5,27 @@ import { api } from '@/lib/api'
 import { PageHeader } from '@/components/PageHeader'
 import { Button } from '@/components/Button'
 import { Field, TextInput, Select, Checkbox } from '@/components/Field'
-import { useCurrencies, useCountries } from '@/lib/useLookups'
+import { useCountries } from '@/lib/useLookups'
 import { useOrgSettings, type OrgSettings } from '@/lib/useOrgSettings'
 
 export function OrganizationSettingsPage() {
   const qc = useQueryClient()
   const settings = useOrgSettings()
-  const currencies = useCurrencies()
   const countries = useCountries()
 
   const [form, setForm] = useState<OrgSettings | null>(null)
   useEffect(() => { if (settings.data && !form) setForm(settings.data) }, [settings.data, form])
 
-  // При смене страны подтягиваем её валюту и ставку НДС (оба из справочника стран).
+  // При смене страны подтягиваем её валюту и ставку НДС (оба read-only, из справочника стран).
   const onCountryChange = (countryCode: string) => {
     if (!form) return
     const country = countries.data?.find((c) => c.code === countryCode)
-    const currency = country?.defaultCurrencyId
-      ? currencies.data?.find((c) => c.id === country.defaultCurrencyId)
-      : undefined
     setForm({
       ...form,
       countryCode,
-      defaultCurrencyId: currency?.id ?? country?.defaultCurrencyId ?? null,
-      defaultCurrencyCode: currency?.code ?? country?.defaultCurrencyCode ?? null,
-      defaultCurrencySymbol: currency?.symbol ?? country?.defaultCurrencySymbol ?? null,
+      defaultCurrencyId: country?.defaultCurrencyId ?? null,
+      defaultCurrencyCode: country?.defaultCurrencyCode ?? null,
+      defaultCurrencySymbol: country?.defaultCurrencySymbol ?? null,
       vatRate: country?.vatRate ?? 0,
     })
   }
@@ -40,7 +36,6 @@ export function OrganizationSettingsPage() {
       const payload = {
         name: form.name,
         countryCode: form.countryCode,
-        defaultCurrencyId: form.defaultCurrencyId,
         multiCurrencyEnabled: form.multiCurrencyEnabled,
         showVatEnabledOnProduct: form.showVatEnabledOnProduct,
       }
@@ -71,17 +66,10 @@ export function OrganizationSettingsPage() {
               </Select>
             </Field>
             <Field label="Валюта по умолчанию">
-              <Select
-                value={form.defaultCurrencyId ?? ''}
-                onChange={(e) => {
-                  const id = e.target.value
-                  const c = currencies.data?.find((x) => x.id === id)
-                  setForm({ ...form, defaultCurrencyId: id || null, defaultCurrencyCode: c?.code ?? null, defaultCurrencySymbol: c?.symbol ?? null })
-                }}
-              >
-                <option value="">—</option>
-                {currencies.data?.map((c) => <option key={c.id} value={c.id}>{c.code} ({c.symbol})</option>)}
-              </Select>
+              <TextInput
+                value={form.defaultCurrencyCode ? `${form.defaultCurrencyCode} (${form.defaultCurrencySymbol ?? ''})` : '—'}
+                disabled
+              />
             </Field>
           </div>