diff --git a/src/components/molecules/MoleculeMigrateAccountModal.vue b/src/components/molecules/MoleculeMigrateAccountModal.vue
new file mode 100644
index 0000000..a6cbfc8
--- /dev/null
+++ b/src/components/molecules/MoleculeMigrateAccountModal.vue
@@ -0,0 +1,75 @@
+<template>
+  <AtomModal
+    :id="id"
+    title="Kontonummer ändern"
+  >
+    <div class="flex flex-col gap-4">
+      <AtomInput
+        v-model="oldAccountNumber"
+        placeholder="Alte Kontonummer"
+        type="number"
+      />
+      <AtomInput
+        v-model="newAccountNumber"
+        placeholder="Neue Kontonummer"
+        type="number"
+      />
+    </div>
+    <template #action>
+      <label
+        ref="abortButton"
+        :for="id"
+        class="btn gap-2"
+      >
+        <XCircleIcon class="w-6 h-6" />
+        Abbrechen
+      </label>
+      <button
+        class="btn gap-2"
+        @click="handleSubmit"
+      >
+        <CheckCircleIcon class="w-6 h-6" />
+        Speichern
+      </button>
+    </template>
+  </AtomModal>
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue';
+import { DataService } from '../services/data.service';
+import { CheckCircleIcon, XCircleIcon } from '@heroicons/vue/outline';
+import AtomInput from '../atoms/AtomInput.vue';
+import AtomModal from '../atoms/AtomModal.vue';
+
+const abortButton = ref();
+const oldAccountNumber = ref('');
+const newAccountNumber = ref('');
+
+defineProps({
+  id: {
+    type: String,
+    required: true,
+  },
+});
+
+async function handleSubmit() {
+  try {
+    const isSuccess = await DataService.migrateAccount(oldAccountNumber.value, newAccountNumber.value);
+    emit('submit', isSuccess);
+    abortButton.value.click();
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  } catch (error: any) {
+    alert('Fehler beim Migrieren');
+    // eslint-disable-next-line no-console
+    console.error(error);
+
+  }
+}
+
+const emit = defineEmits(['submit']);
+</script>
+
+<style lang="scss" scoped>
+
+</style>
\ No newline at end of file
diff --git a/src/components/services/account.service.ts b/src/components/services/account.service.ts
index 07f4b42..9f3a37a 100644
--- a/src/components/services/account.service.ts
+++ b/src/components/services/account.service.ts
@@ -53,4 +53,14 @@ export const AccountService = {
     const accountDocument = await database.createDocument<IAccount & Models.Document>(ACCOUNTS_COLLECTION_ID, 'unique()', account);
     return accountDocument;
   },
+  async migrateAccount(oldAccountNumber: string, newAccountNumber: string): Promise<IAccount> {
+    const account = await this.getAccount(oldAccountNumber);
+    if(!account) {
+      throw new Error('Account not found');
+    }
+    await database.updateDocument<IAccount & Models.Document>(ACCOUNTS_COLLECTION_ID, account.$id, {
+      accountNumber: newAccountNumber,
+    });
+    return account;
+  },
 };
\ No newline at end of file
diff --git a/src/components/services/bank.service.ts b/src/components/services/bank.service.ts
index 03d9400..f79a8b0 100644
--- a/src/components/services/bank.service.ts
+++ b/src/components/services/bank.service.ts
@@ -11,10 +11,10 @@ const SALARY_LABEL = 'Gehalt';
 const WITHDRAW_LABEL = 'Bargeldauszahlung';
 const OPEN_ACCOUNT_LABEL = 'Kontoeröffnung';
 const sdk = AppwriteService.getSDK();
+const database = new Databases(sdk, DATABASE_ID);
 
 export const BankService = {
   async getAccountDetails(accountNumber: string): Promise<IAccount> {
-    const database = new Databases(sdk, DATABASE_ID);
     const account = await AccountService.getAccount(accountNumber);
     if(!account) {
       throw new Error('Account not found');
@@ -35,7 +35,6 @@ export const BankService = {
     };
   },
   async addTransaction(accountNumber: string, amount: number, type: TransactionType): Promise<ITransaction> {
-    const database = new Databases(sdk, DATABASE_ID);
     let label = '';
     switch (type) {
     case TransactionType.DEPOSIT:
@@ -59,6 +58,16 @@ export const BankService = {
     await AccountService.updateBalance(accountNumber, type === TransactionType.WITHDRAW ? -amount : amount);
     return { label: transactionDocument.label, amount: transactionDocument.amount, date: new Date(transactionDocument.$createdAt * 1000) };
   },
+  async migrateTransactions(oldAccountNumber: string, newAccountNumber: string): Promise<boolean> {
+    const transactionDocuments = await database.listDocuments<ITransaction & Models.Document>(
+      TRANSACTIONS_COLLECTION_ID, [Query.equal('accountNumber', oldAccountNumber)], 100, 0, undefined, undefined, ['$createdAt'], ['DESC']);
+    transactionDocuments.documents.forEach(async transaction => {
+      await database.updateDocument(TRANSACTIONS_COLLECTION_ID, transaction.$id, {
+        accountNumber: newAccountNumber,
+      });
+    });
+    return true;
+  },
 };
 
 export enum TransactionType {
diff --git a/src/components/services/data.service.ts b/src/components/services/data.service.ts
index 8a1e52c..02fc06b 100644
--- a/src/components/services/data.service.ts
+++ b/src/components/services/data.service.ts
@@ -65,4 +65,9 @@ export const DataService = {
     accountDocument.balance = OPEN_ACCOUNT_BALANCE;
     return accountDocument;
   },
+  async migrateAccount(oldAccountNumber: string, newAccountNumber: string): Promise<boolean> {
+    await AccountService.migrateAccount(oldAccountNumber, newAccountNumber);
+    await BankService.migrateTransactions(oldAccountNumber, newAccountNumber);
+    return true;
+  },
 };
\ No newline at end of file
diff --git a/src/components/views/DataView.vue b/src/components/views/DataView.vue
index bbfa1a4..58a2f74 100644
--- a/src/components/views/DataView.vue
+++ b/src/components/views/DataView.vue
@@ -27,10 +27,19 @@
       :name="contactName"
       :contact="contact"
     />
+    <MoleculeMigrateAccountModal
+      :id="migrateAccountModalId"
+    />
     <MoleculeAddAccountModal
       :id="addAccountModalId"
       @submit="addAccount"
     />
+    <label
+      class="btn btn-primary btn-lg btn-circle shadow-2xl fixed bottom-8 right-28"
+      :for="migrateAccountModalId"
+    >
+      <SupportIcon class="w-7 h-7" />
+    </label>
     <label
       class="btn btn-primary btn-lg btn-circle shadow-2xl fixed bottom-8 right-8"
       :for="addAccountModalId"
@@ -44,11 +53,12 @@
 import { onMounted, ref } from 'vue';
 import { DataService } from '../services/data.service';
 import { IAccountData } from '../../interfaces/account-data.interface';
-import { PlusIcon } from '@heroicons/vue/outline';
+import { PlusIcon, SupportIcon } from '@heroicons/vue/outline';
 import MoleculeAddAccountModal from '../molecules/MoleculeAddAccountModal.vue';
 import MoleculeContactModal from '../molecules/MoleculeContactModal.vue';
 import MoleculeDataTable, { TableHeaderType } from '../molecules/MoleculeDataTable.vue';
 import AtomInput from '../atoms/AtomInput.vue';
+import MoleculeMigrateAccountModal from '../molecules/MoleculeMigrateAccountModal.vue';
 
 const ACCESS_PIN_KEY = '1337';
 const pinCorrect = ref(false);
@@ -57,6 +67,7 @@ const contactName = ref('');
 const contact = ref<string[]>([]);
 const contactModalId = 'contact-modal';
 const addAccountModalId = 'add-account-modal';
+const migrateAccountModalId = 'migrate-account-modal';
 const tableHeaders = [
   {
     title: 'Kontonummer',