diff --git a/components/bokslut/DigitalInlamning.tsx b/components/bokslut/DigitalInlamning.tsx
index 37d76a9e..0014fe02 100644
--- a/components/bokslut/DigitalInlamning.tsx
+++ b/components/bokslut/DigitalInlamning.tsx
@@ -182,6 +182,7 @@ export function DigitalInlamning({ periodId }: { periodId: string }) {
   const [submissions, setSubmissions] = useState<SubmissionRow[]>([])
   const [loadingSubmissions, setLoadingSubmissions] = useState(false)
   const [submissionsError, setSubmissionsError] = useState<string | null>(null)
+  const [pollingEvents, setPollingEvents] = useState(false)
 
   useEffect(() => {
     const signer = versions.find((version) => version.id === selectedVersionId)
@@ -384,6 +385,7 @@ export function DigitalInlamning({ periodId }: { periodId: string }) {
   }
 
   const handlePollEvents = async () => {
+    setPollingEvents(true)
     try {
       const res = await fetch('/api/extensions/ext/bolagsverket/poll-events', {
         method: 'POST',
@@ -399,6 +401,8 @@ export function DigitalInlamning({ periodId }: { periodId: string }) {
       toast({ title: 'Status uppdaterad från Bolagsverket' })
     } catch {
       toast({ title: 'Kunde inte hämta händelser', variant: 'destructive' })
+    } finally {
+      setPollingEvents(false)
     }
   }
 
@@ -794,8 +798,19 @@ export function DigitalInlamning({ periodId }: { periodId: string }) {
           </CardHeader>
           <CardContent className="space-y-4 text-sm">
             <div className="flex justify-end">
-              <Button className="min-h-11" variant="outline" size="sm" onClick={() => void handlePollEvents()}>
-                <RefreshCcw className="mr-2 h-4 w-4" /> Uppdatera status
+              <Button
+                className="min-h-11"
+                variant="outline"
+                size="sm"
+                disabled={pollingEvents}
+                onClick={() => void handlePollEvents()}
+              >
+                {pollingEvents ? (
+                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                ) : (
+                  <RefreshCcw className="mr-2 h-4 w-4" />
+                )}
+                {pollingEvents ? 'Uppdaterar …' : 'Uppdatera status'}
               </Button>
             </div>
             {submissionsError && <p className="text-xs text-destructive">{submissionsError}</p>}
diff --git a/components/settings/AgentMemoryPanel.tsx b/components/settings/AgentMemoryPanel.tsx
index 42bdba4b..dba4b522 100644
--- a/components/settings/AgentMemoryPanel.tsx
+++ b/components/settings/AgentMemoryPanel.tsx
@@ -371,7 +371,11 @@ export function AgentMemoryPanel() {
                                   onClick={() => patch(row.id, { is_active: false })}
                                   disabled={isBusy}
                                 >
-                                  <Trash2 className="mr-1 h-3.5 w-3.5" />
+                                  {isBusy ? (
+                                    <Loader2 className="mr-1 h-3.5 w-3.5 animate-spin" />
+                                  ) : (
+                                    <Trash2 className="mr-1 h-3.5 w-3.5" />
+                                  )}
                                   Dölj
                                 </Button>
                               </>
@@ -382,7 +386,11 @@ export function AgentMemoryPanel() {
                                 onClick={() => patch(row.id, { is_active: true })}
                                 disabled={isBusy}
                               >
-                                <RotateCcw className="mr-1 h-3.5 w-3.5" />
+                                {isBusy ? (
+                                  <Loader2 className="mr-1 h-3.5 w-3.5 animate-spin" />
+                                ) : (
+                                  <RotateCcw className="mr-1 h-3.5 w-3.5" />
+                                )}
                                 Återställ
                               </Button>
                             )}
diff --git a/components/settings/SkatteverketConnectPanel.tsx b/components/settings/SkatteverketConnectPanel.tsx
index 6dabb6a7..76ad9ca4 100644
--- a/components/settings/SkatteverketConnectPanel.tsx
+++ b/components/settings/SkatteverketConnectPanel.tsx
@@ -10,7 +10,7 @@ import { useCapability } from '@/contexts/CompanyContext'
 import { isAllowedSkvPopupOrigin } from '@/lib/skatteverket/popup-origin'
 import { CAPABILITY } from '@/lib/entitlements/keys'
 import { UpgradeNote } from '@/components/billing/UpgradeNote'
-import { CheckCircle2, ExternalLink, ShieldOff, FlaskConical, ShieldAlert } from 'lucide-react'
+import { CheckCircle2, ExternalLink, Loader2, ShieldOff, FlaskConical, ShieldAlert } from 'lucide-react'
 import { getErrorMessage as getUserErrorMessage } from '@/lib/errors/get-error-message'
 
 type Environment = 'test' | 'prod'
@@ -552,6 +552,7 @@ function SkatteverketSystemConnectionCard() {
             </Button>
           )}
           <Button onClick={verify} disabled={verifying}>
+            {verifying && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
             {verifying ? t('system_verifying') : t('system_verify')}
           </Button>
         </div>
diff --git a/components/transactions/BankSyncNowButton.tsx b/components/transactions/BankSyncNowButton.tsx
index 28d0a0c3..a6a2c177 100644
--- a/components/transactions/BankSyncNowButton.tsx
+++ b/components/transactions/BankSyncNowButton.tsx
@@ -46,6 +46,9 @@ export function useBankSync() {
   const hasBankSync = useCapability(CAPABILITY.bank_sync)
   const [connections, setConnections] = useState<BankConn[] | null>(null)
   const [busyId, setBusyId] = useState<string | null>(null)
+  // Holds isBusy true across the whole syncAll loop so the spinner doesn't
+  // flicker off between per-connection syncs.
+  const [syncingAll, setSyncingAll] = useState(false)
 
   useEffect(() => {
     if (!company?.id) return
@@ -156,14 +159,19 @@ export function useBankSync() {
   // active connection in turn; with only dead connections it jumps straight
   // to re-authorizing the first one (a retry can't revive a closed session).
   async function syncAll() {
-    const conns = connections ?? []
-    const active = conns.filter((c) => c.status === 'active')
-    if (active.length === 0) {
-      if (conns[0]) await reconnect(conns[0])
-      return
-    }
-    for (const conn of active) {
-      await syncConnection(conn)
+    setSyncingAll(true)
+    try {
+      const conns = connections ?? []
+      const active = conns.filter((c) => c.status === 'active')
+      if (active.length === 0) {
+        if (conns[0]) await reconnect(conns[0])
+        return
+      }
+      for (const conn of active) {
+        await syncConnection(conn)
+      }
+    } finally {
+      setSyncingAll(false)
     }
   }
 
@@ -177,7 +185,7 @@ export function useBankSync() {
   return {
     connections,
     busyId,
-    isBusy: busyId !== null,
+    isBusy: busyId !== null || syncingAll,
     hasBankSync,
     reconnect,
     syncConnection,
diff --git a/components/transactions/TransactionStatusBar.tsx b/components/transactions/TransactionStatusBar.tsx
index 63bfd86a..4b6c7482 100644
--- a/components/transactions/TransactionStatusBar.tsx
+++ b/components/transactions/TransactionStatusBar.tsx
@@ -26,7 +26,7 @@ export default function TransactionStatusBar({
   const t = useTranslations('transactions')
   const router = useRouter()
   const { uiState, loaded } = useUiState()
-  const { connections, hasBankSync, syncAll, lastSyncedAt } = useBankSync()
+  const { connections, hasBankSync, syncAll, lastSyncedAt, isBusy } = useBankSync()
   const formatAge = useAgeFormatter()
 
   // "Synka bank nu" (concept: first menu row) only renders once a bank is
@@ -41,6 +41,8 @@ export default function TransactionStatusBar({
             key: 'synka',
             label: t('create_synka'),
             icon: RefreshCw,
+            busy: isBusy,
+            busyLabel: t('bank_sync_button_syncing'),
             description: lastSyncedAt
               ? t('create_synka_desc_last', { age: formatAge(lastSyncedAt) })
               : t('create_synka_desc'),
diff --git a/components/ui/split-button.tsx b/components/ui/split-button.tsx
index fb070f05..ec7d157c 100644
--- a/components/ui/split-button.tsx
+++ b/components/ui/split-button.tsx
@@ -6,7 +6,7 @@ import { useTranslations } from 'next-intl'
 import { cn } from '@/lib/utils'
 import { Button, type ButtonProps } from '@/components/ui/button'
 import { rememberCreateMode } from '@/lib/ui-state/client'
-import { Check, ChevronDown, type LucideIcon } from 'lucide-react'
+import { Check, ChevronDown, Loader2, type LucideIcon } from 'lucide-react'
 
 export interface SplitButtonOption {
   key: string
@@ -18,6 +18,11 @@ export interface SplitButtonOption {
    *  as the tooltip instead of silently no-opping. */
   disabled?: boolean
   disabledTitle?: string
+  /** In-flight async action (e.g. bank sync): spinner replaces the icon and
+   *  the option is inert until it resolves. */
+  busy?: boolean
+  /** Label shown on the primary face while busy (e.g. "Synkar…"). */
+  busyLabel?: string
   onSelect: () => void
 }
 
@@ -102,7 +107,7 @@ export function SplitButton({
   if (!active) return null
 
   const runOption = (option: SplitButtonOption) => {
-    if (option.disabled) return
+    if (option.disabled || option.busy) return
     setActiveKey(option.key)
     if (persistKey) rememberCreateMode(persistKey, option.key)
     option.onSelect()
@@ -113,12 +118,17 @@ export function SplitButton({
       <Button
         variant={variant}
         className="rounded-r-none"
-        disabled={active.disabled}
+        disabled={active.disabled || active.busy}
+        aria-busy={active.busy || undefined}
         title={active.disabled ? active.disabledTitle : undefined}
         onClick={() => runOption(active)}
       >
-        {active.icon && <active.icon className="mr-1.5 h-4 w-4" />}
-        {active.label}
+        {active.busy ? (
+          <Loader2 className="mr-1.5 h-4 w-4 animate-spin" />
+        ) : (
+          active.icon && <active.icon className="mr-1.5 h-4 w-4" />
+        )}
+        {active.busy ? (active.busyLabel ?? active.label) : active.label}
       </Button>
       <Button
         ref={caretRef}
@@ -151,7 +161,7 @@ export function SplitButton({
                   key={option.key}
                   type="button"
                   role="menuitem"
-                  disabled={option.disabled}
+                  disabled={option.disabled || option.busy}
                   title={option.disabled ? option.disabledTitle : undefined}
                   onClick={() => {
                     setOpen(false)
@@ -164,8 +174,12 @@ export function SplitButton({
                       : 'text-muted-foreground hover:bg-secondary/60 hover:text-foreground',
                   )}
                 >
-                  {option.icon && (
-                    <option.icon className="mt-0.5 h-4 w-4 flex-shrink-0" />
+                  {option.busy ? (
+                    <Loader2 className="mt-0.5 h-4 w-4 flex-shrink-0 animate-spin" />
+                  ) : (
+                    option.icon && (
+                      <option.icon className="mt-0.5 h-4 w-4 flex-shrink-0" />
+                    )
                   )}
                   <span className="min-w-0 flex-1">
                     <span className="block text-[13px] text-foreground">{option.label}</span>
diff --git a/extensions/general/stripe/components/StripeSettingsPanel.tsx b/extensions/general/stripe/components/StripeSettingsPanel.tsx
index 808d1552..13221c99 100644
--- a/extensions/general/stripe/components/StripeSettingsPanel.tsx
+++ b/extensions/general/stripe/components/StripeSettingsPanel.tsx
@@ -11,7 +11,7 @@ import { Skeleton } from '@/components/ui/skeleton'
 import { useToast } from '@/components/ui/use-toast'
 import { useFormat } from '@/lib/hooks/use-format'
 import { formatCurrency, formatDate } from '@/lib/utils'
-import { CreditCard, Link2, RefreshCw, Unlink } from 'lucide-react'
+import { CreditCard, Link2, Loader2, RefreshCw, Unlink } from 'lucide-react'
 import type { StripeReviewEvent, StripeStatusResponse } from '../types'
 
 type ConnectionInfo = NonNullable<StripeStatusResponse['connection']>
@@ -302,7 +302,11 @@ export default function StripeSettingsPanel() {
               ) : (
                 <div className="flex items-center gap-2">
                   <Button variant="outline" size="sm" onClick={handleSyncNow} disabled={syncing}>
-                    <RefreshCw className="mr-2 h-4 w-4" />
+                    {syncing ? (
+                      <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                    ) : (
+                      <RefreshCw className="mr-2 h-4 w-4" />
+                    )}
                     {syncing ? t('syncing') : t('sync_now')}
                   </Button>
                   <Button variant="outline" size="sm" onClick={() => setConfirmDisconnect(true)}>