diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/composables/StateHandler.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/composables/StateHandler.kt
index 8b9527c..cdb51f4 100644
--- a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/composables/StateHandler.kt
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/composables/StateHandler.kt
@@ -3,15 +3,23 @@ package net.codinux.banking.ui.composables
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import net.codinux.banking.ui.dialogs.ApplicationErrorDialog
 import net.codinux.banking.ui.dialogs.BankingClientErrorDialog
 import net.codinux.banking.ui.state.UiState
 
 @Composable
 fun StateHandler(uiState: UiState) {
+    val applicationError by uiState.applicationErrorOccurred.collectAsState()
     val bankingClientError by uiState.bankingClientErrorOccurred.collectAsState()
 
-    bankingClientError?.let {
-        BankingClientErrorDialog(it) {
+    applicationError?.let { error ->
+        ApplicationErrorDialog(error) {
+            uiState.applicationErrorOccurred.value = null
+        }
+    }
+
+    bankingClientError?.let { error ->
+        BankingClientErrorDialog(error) {
             uiState.bankingClientErrorOccurred.value = null
         }
     }
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/config/Internationalization.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/config/Internationalization.kt
new file mode 100644
index 0000000..33cae92
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/config/Internationalization.kt
@@ -0,0 +1,9 @@
+package net.codinux.banking.ui.config
+
+object Internationalization {
+
+    const val ErrorAddAccount = "Konto konnte nicht hinzugefügt werden"
+
+    const val ErrorUpdateAccountTransactions = "Umsätze konnten nicht aktualisiert werden"
+
+}
\ No newline at end of file
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/ApplicationErrorDialog.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/ApplicationErrorDialog.kt
new file mode 100644
index 0000000..5130b65
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/ApplicationErrorDialog.kt
@@ -0,0 +1,18 @@
+package net.codinux.banking.ui.dialogs
+
+import androidx.compose.runtime.Composable
+import net.codinux.banking.ui.config.Internationalization
+import net.codinux.banking.ui.model.error.ApplicationError
+import net.codinux.banking.ui.model.error.ErroneousAction
+
+@Composable
+fun ApplicationErrorDialog(error: ApplicationError, onDismiss: (() -> Unit)? = null) {
+    val title = when (error.erroneousAction) {
+        ErroneousAction.AddAccount -> Internationalization.ErrorAddAccount
+        ErroneousAction.UpdateAccountTransactions -> Internationalization.ErrorUpdateAccountTransactions
+    }
+
+    // add exception stacktrace?
+
+    ErrorDialog(error.errorMessage, title, onDismiss = onDismiss)
+}
\ No newline at end of file
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/BankingClientErrorDialog.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/BankingClientErrorDialog.kt
index db5d72d..841eef9 100644
--- a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/BankingClientErrorDialog.kt
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/BankingClientErrorDialog.kt
@@ -1,15 +1,16 @@
 package net.codinux.banking.ui.dialogs
 
 import androidx.compose.runtime.Composable
-import net.codinux.banking.ui.model.BankingClientAction
-import net.codinux.banking.ui.model.BankingClientError
+import net.codinux.banking.ui.config.Internationalization
+import net.codinux.banking.ui.model.error.BankingClientAction
+import net.codinux.banking.ui.model.error.BankingClientError
 import net.codinux.banking.ui.model.Config
 
 @Composable
 fun BankingClientErrorDialog(error: BankingClientError, onDismiss: (() -> Unit)? = null) {
     val title = when (error.erroneousAction) {
-        BankingClientAction.AddAccount -> "Konto konnte nicht hinzugefügt werden"
-        BankingClientAction.UpdateAccountTransactions -> "Umsätze konnten nicht aktualisiert werden"
+        BankingClientAction.AddAccount -> Internationalization.ErrorAddAccount
+        BankingClientAction.UpdateAccountTransactions -> Internationalization.ErrorUpdateAccountTransactions
     }
 
     val text = if (error.error.internalError != null) {
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ApplicationError.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ApplicationError.kt
new file mode 100644
index 0000000..92756ea
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ApplicationError.kt
@@ -0,0 +1,9 @@
+package net.codinux.banking.ui.model.error
+
+data class ApplicationError(
+    val erroneousAction: ErroneousAction,
+    val errorMessage: String,
+    val exception: Throwable? = null
+) {
+    override fun toString() = "$erroneousAction $errorMessage"
+}
\ No newline at end of file
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/BankingClientAction.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/BankingClientAction.kt
similarity index 64%
rename from composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/BankingClientAction.kt
rename to composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/BankingClientAction.kt
index 8ff5d95..bf62809 100644
--- a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/BankingClientAction.kt
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/BankingClientAction.kt
@@ -1,4 +1,4 @@
-package net.codinux.banking.ui.model
+package net.codinux.banking.ui.model.error
 
 enum class BankingClientAction {
     AddAccount,
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/BankingClientError.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/BankingClientError.kt
similarity index 83%
rename from composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/BankingClientError.kt
rename to composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/BankingClientError.kt
index c0dc745..aa32a28 100644
--- a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/BankingClientError.kt
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/BankingClientError.kt
@@ -1,4 +1,4 @@
-package net.codinux.banking.ui.model
+package net.codinux.banking.ui.model.error
 
 import net.codinux.banking.client.model.response.Error
 
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ErroneousAction.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ErroneousAction.kt
new file mode 100644
index 0000000..9ca90ee
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ErroneousAction.kt
@@ -0,0 +1,6 @@
+package net.codinux.banking.ui.model.error
+
+enum class ErroneousAction {
+    AddAccount,
+    UpdateAccountTransactions
+}
\ No newline at end of file
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/BankingService.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/BankingService.kt
index 05b1939..6c5003c 100644
--- a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/BankingService.kt
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/BankingService.kt
@@ -12,8 +12,9 @@ import net.codinux.banking.client.model.response.ResponseType
 import net.codinux.banking.fints.config.FinTsClientConfiguration
 import net.codinux.banking.fints.config.FinTsClientOptions
 import net.codinux.banking.ui.model.BankInfo
-import net.codinux.banking.ui.model.BankingClientAction
-import net.codinux.banking.ui.model.BankingClientError
+import net.codinux.banking.ui.model.error.BankingClientAction
+import net.codinux.banking.ui.model.error.BankingClientError
+import net.codinux.banking.ui.model.error.ErroneousAction
 import net.codinux.banking.ui.state.UiState
 import net.codinux.csv.reader.CsvReader
 import net.codinux.log.Log
@@ -64,7 +65,7 @@ class BankingService(
         } catch (e: Throwable) {
             log.error(e) { "Could not add account for ${bank.name} $loginName" }
 
-            // TODO: handle internal error
+            uiState.applicationErrorOccurred(ErroneousAction.AddAccount, e)
 
             return false
         }
diff --git a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/state/UiState.kt b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/state/UiState.kt
index c6baf3c..abda1e7 100644
--- a/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/state/UiState.kt
+++ b/composeApp/src/commonMain/kotlin/net/codinux/banking/ui/state/UiState.kt
@@ -3,12 +3,26 @@ package net.codinux.banking.ui.state
 import androidx.lifecycle.ViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import net.codinux.banking.client.model.AccountTransaction
-import net.codinux.banking.ui.model.BankingClientError
+import net.codinux.banking.ui.model.error.ApplicationError
+import net.codinux.banking.ui.model.error.BankingClientError
+import net.codinux.banking.ui.model.error.ErroneousAction
 
 class UiState : ViewModel() {
 
     val transactions = MutableStateFlow<List<AccountTransaction>>(emptyList())
 
+    val applicationErrorOccurred = MutableStateFlow<ApplicationError?>(null)
+
     val bankingClientErrorOccurred = MutableStateFlow<BankingClientError?>(null)
 
+
+    fun applicationErrorOccurred(erroneousAction: ErroneousAction, exception: Throwable, errorMessage: String? = null) {
+        val message = errorMessage
+            ?: exception.message ?: exception::class.simpleName // TODO: find a better way to get error message from exception
+
+        if (message != null) {
+            applicationErrorOccurred.value = ApplicationError(erroneousAction, message, exception)
+        }
+    }
+
 }
\ No newline at end of file