diff --git a/app/Enums/ImportConfigType.php b/app/Enums/ImportConfigType.php
new file mode 100644
index 00000000..bb6f60df
--- /dev/null
+++ b/app/Enums/ImportConfigType.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Enums;
+
+enum ImportConfigType: string
+{
+    case Transaction = 'transaction';
+    case Balance = 'balance';
+}
diff --git a/app/Http/Controllers/Api/AccountImportConfigController.php b/app/Http/Controllers/Api/AccountImportConfigController.php
new file mode 100644
index 00000000..c7784e75
--- /dev/null
+++ b/app/Http/Controllers/Api/AccountImportConfigController.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Enums\ImportConfigType;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Api\UpdateAccountImportConfigRequest;
+use App\Models\Account;
+use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Validation\Rule;
+
+class AccountImportConfigController extends Controller
+{
+    use AuthorizesRequests;
+
+    public function show(Request $request, Account $account): JsonResponse
+    {
+        $this->authorize('view', $account);
+
+        $validated = $request->validate([
+            'type' => ['required', Rule::enum(ImportConfigType::class)],
+        ]);
+
+        $config = $account->importConfigs()
+            ->where('type', $validated['type'])
+            ->first();
+
+        return response()->json(['data' => $config?->config]);
+    }
+
+    public function update(UpdateAccountImportConfigRequest $request, Account $account): JsonResponse
+    {
+        $this->authorize('update', $account);
+
+        $config = $account->importConfigs()->updateOrCreate(
+            ['type' => $request->validated('type')],
+            ['config' => $request->validated('config')],
+        );
+
+        return response()->json(['data' => $config->config]);
+    }
+}
diff --git a/app/Http/Requests/Api/UpdateAccountImportConfigRequest.php b/app/Http/Requests/Api/UpdateAccountImportConfigRequest.php
new file mode 100644
index 00000000..99ae1a9a
--- /dev/null
+++ b/app/Http/Requests/Api/UpdateAccountImportConfigRequest.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Http\Requests\Api;
+
+use App\Enums\ImportConfigType;
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class UpdateAccountImportConfigRequest extends FormRequest
+{
+    /**
+     * Authorization is handled by the controller via the AccountPolicy.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'type' => ['required', Rule::enum(ImportConfigType::class)],
+            'config' => ['required', 'array'],
+            'config.columnMapping' => ['required', 'array'],
+            'config.dateFormat' => ['required', 'string', 'max:20'],
+        ];
+    }
+}
diff --git a/app/Models/Account.php b/app/Models/Account.php
index 3d96c7ca..cd96895e 100644
--- a/app/Models/Account.php
+++ b/app/Models/Account.php
@@ -104,6 +104,12 @@ class Account extends Model
         return $this->hasMany(AccountBalance::class);
     }
 
+    /** @return HasMany<AccountImportConfig, $this> */
+    public function importConfigs(): HasMany
+    {
+        return $this->hasMany(AccountImportConfig::class);
+    }
+
     /** @return BelongsTo<BankingConnection, $this> */
     public function bankingConnection(): BelongsTo
     {
diff --git a/app/Models/AccountImportConfig.php b/app/Models/AccountImportConfig.php
new file mode 100644
index 00000000..f1185fa0
--- /dev/null
+++ b/app/Models/AccountImportConfig.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models;
+
+use App\Enums\ImportConfigType;
+use Database\Factories\AccountImportConfigFactory;
+use Illuminate\Database\Eloquent\Concerns\HasUuids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class AccountImportConfig extends Model
+{
+    /** @use HasFactory<AccountImportConfigFactory> */
+    use HasFactory, HasUuids;
+
+    protected $fillable = [
+        'account_id',
+        'type',
+        'config',
+    ];
+
+    /** @var list<string> */
+    protected $hidden = [
+        'id',
+        'account_id',
+        'created_at',
+        'updated_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'type' => ImportConfigType::class,
+            'config' => 'array',
+        ];
+    }
+
+    /** @return BelongsTo<Account, $this> */
+    public function account(): BelongsTo
+    {
+        return $this->belongsTo(Account::class);
+    }
+}
diff --git a/database/factories/AccountImportConfigFactory.php b/database/factories/AccountImportConfigFactory.php
new file mode 100644
index 00000000..4e5c5e49
--- /dev/null
+++ b/database/factories/AccountImportConfigFactory.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Enums\ImportConfigType;
+use App\Models\Account;
+use App\Models\AccountImportConfig;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends Factory<AccountImportConfig>
+ */
+class AccountImportConfigFactory extends Factory
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'account_id' => Account::factory(),
+            'type' => ImportConfigType::Transaction,
+            'config' => [
+                'columnMapping' => [
+                    'transaction_date' => 'Date',
+                    'description' => 'Description',
+                    'amount' => 'Amount',
+                    'balance' => null,
+                    'creditor_name' => null,
+                    'debtor_name' => null,
+                ],
+                'dateFormat' => 'YYYY-MM-DD',
+            ],
+        ];
+    }
+}
diff --git a/database/migrations/2026_07_18_104433_create_account_import_configs_table.php b/database/migrations/2026_07_18_104433_create_account_import_configs_table.php
new file mode 100644
index 00000000..00125332
--- /dev/null
+++ b/database/migrations/2026_07_18_104433_create_account_import_configs_table.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('account_import_configs', function (Blueprint $table) {
+            $table->uuid('id')->primary();
+            $table->foreignUuid('account_id')->constrained()->cascadeOnDelete();
+            $table->string('type');
+            $table->json('config');
+            $table->timestamps();
+
+            $table->unique(['account_id', 'type']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('account_import_configs');
+    }
+};
diff --git a/resources/js/components/accounts/import-balances-drawer.tsx b/resources/js/components/accounts/import-balances-drawer.tsx
index 6e12c1e1..f84b92df 100644
--- a/resources/js/components/accounts/import-balances-drawer.tsx
+++ b/resources/js/components/accounts/import-balances-drawer.tsx
@@ -283,7 +283,7 @@ export function ImportBalancesDrawer({
             let finalDateFormat = detectedFormat;
 
             if (state.selectedAccountId) {
-                const savedConfig = loadBalanceImportConfig(
+                const savedConfig = await loadBalanceImportConfig(
                     state.selectedAccountId,
                 );
 
@@ -390,7 +390,7 @@ export function ImportBalancesDrawer({
             }
 
             if (state.selectedAccountId) {
-                saveBalanceImportConfig(state.selectedAccountId, {
+                void saveBalanceImportConfig(state.selectedAccountId, {
                     columnMapping: state.columnMapping,
                     dateFormat: state.dateFormat,
                 });
diff --git a/resources/js/components/transactions/import-transactions-drawer.tsx b/resources/js/components/transactions/import-transactions-drawer.tsx
index 062e660b..bb85bfee 100644
--- a/resources/js/components/transactions/import-transactions-drawer.tsx
+++ b/resources/js/components/transactions/import-transactions-drawer.tsx
@@ -227,7 +227,9 @@ export function ImportTransactionsDrawer({
             let finalDateFormat = detectedFormat;
 
             if (state.selectedAccountId) {
-                const savedConfig = loadImportConfig(state.selectedAccountId);
+                const savedConfig = await loadImportConfig(
+                    state.selectedAccountId,
+                );
 
                 if (savedConfig) {
                     const isValidMapping = (
@@ -458,7 +460,7 @@ export function ImportTransactionsDrawer({
             }
 
             if (state.selectedAccountId) {
-                saveImportConfig(state.selectedAccountId, {
+                void saveImportConfig(state.selectedAccountId, {
                     columnMapping: state.columnMapping,
                     dateFormat: state.dateFormat,
                 });
diff --git a/resources/js/lib/balance-import-config-storage.ts b/resources/js/lib/balance-import-config-storage.ts
index 4c386f99..8643238f 100644
--- a/resources/js/lib/balance-import-config-storage.ts
+++ b/resources/js/lib/balance-import-config-storage.ts
@@ -1,44 +1,43 @@
 import type { BalanceColumnMapping } from '@/types/balance-import';
 import { DateFormat } from '@/types/import';
 import type { UUID } from '@/types/uuid';
+import axios from 'axios';
 
 interface BalanceImportConfig {
     columnMapping: BalanceColumnMapping;
     dateFormat: DateFormat;
 }
 
-const STORAGE_KEY_PREFIX = 'balance_import_config_account_';
+function configUrl(accountId: UUID): string {
+    return `/api/accounts/${accountId}/import-config`;
+}
 
-export function saveBalanceImportConfig(
+export async function saveBalanceImportConfig(
     accountId: UUID,
     config: BalanceImportConfig,
-): void {
-    if (typeof window === 'undefined') return;
-
+): Promise<void> {
     try {
-        const key = `${STORAGE_KEY_PREFIX}${accountId}`;
-        localStorage.setItem(key, JSON.stringify(config));
+        await axios.put(configUrl(accountId), {
+            type: 'balance',
+            config,
+        });
     } catch (error) {
         console.error('Failed to save balance import configuration:', error);
     }
 }
 
-export function loadBalanceImportConfig(
+export async function loadBalanceImportConfig(
     accountId: UUID,
-): BalanceImportConfig | null {
-    if (typeof window === 'undefined') return null;
-
+): Promise<BalanceImportConfig | null> {
     try {
-        const key = `${STORAGE_KEY_PREFIX}${accountId}`;
-        const stored = localStorage.getItem(key);
+        const { data } = await axios.get<{ data: BalanceImportConfig | null }>(
+            configUrl(accountId),
+            { params: { type: 'balance' } },
+        );
 
-        if (!stored) {
-            return null;
-        }
+        const config = data.data;
 
-        const config = JSON.parse(stored) as BalanceImportConfig;
-
-        if (!config.columnMapping || !config.dateFormat) {
+        if (!config || !config.columnMapping || !config.dateFormat) {
             return null;
         }
 
@@ -48,14 +47,3 @@ export function loadBalanceImportConfig(
         return null;
     }
 }
-
-export function clearBalanceImportConfig(accountId: UUID): void {
-    if (typeof window === 'undefined') return;
-
-    try {
-        const key = `${STORAGE_KEY_PREFIX}${accountId}`;
-        localStorage.removeItem(key);
-    } catch (error) {
-        console.error('Failed to clear balance import configuration:', error);
-    }
-}
diff --git a/resources/js/lib/import-config-storage.ts b/resources/js/lib/import-config-storage.ts
index 5a85a811..eed5e8c5 100644
--- a/resources/js/lib/import-config-storage.ts
+++ b/resources/js/lib/import-config-storage.ts
@@ -1,38 +1,42 @@
 import { type ColumnMapping, DateFormat } from '@/types/import';
 import { type UUID } from '@/types/uuid';
+import axios from 'axios';
 
 interface ImportConfig {
     columnMapping: ColumnMapping;
     dateFormat: DateFormat;
 }
 
-const STORAGE_KEY_PREFIX = 'import_config_account_';
-
-export function saveImportConfig(accountId: UUID, config: ImportConfig): void {
-    if (typeof window === 'undefined') return;
+function configUrl(accountId: UUID): string {
+    return `/api/accounts/${accountId}/import-config`;
+}
 
+export async function saveImportConfig(
+    accountId: UUID,
+    config: ImportConfig,
+): Promise<void> {
     try {
-        const key = `${STORAGE_KEY_PREFIX}${accountId}`;
-        localStorage.setItem(key, JSON.stringify(config));
+        await axios.put(configUrl(accountId), {
+            type: 'transaction',
+            config,
+        });
     } catch (error) {
         console.error('Failed to save import configuration:', error);
     }
 }
 
-export function loadImportConfig(accountId: UUID): ImportConfig | null {
-    if (typeof window === 'undefined') return null;
-
+export async function loadImportConfig(
+    accountId: UUID,
+): Promise<ImportConfig | null> {
     try {
-        const key = `${STORAGE_KEY_PREFIX}${accountId}`;
-        const stored = localStorage.getItem(key);
+        const { data } = await axios.get<{ data: ImportConfig | null }>(
+            configUrl(accountId),
+            { params: { type: 'transaction' } },
+        );
 
-        if (!stored) {
-            return null;
-        }
+        const config = data.data;
 
-        const config = JSON.parse(stored) as ImportConfig;
-
-        if (!config.columnMapping || !config.dateFormat) {
+        if (!config || !config.columnMapping || !config.dateFormat) {
             return null;
         }
 
@@ -42,14 +46,3 @@ export function loadImportConfig(accountId: UUID): ImportConfig | null {
         return null;
     }
 }
-
-export function clearImportConfig(accountId: UUID): void {
-    if (typeof window === 'undefined') return;
-
-    try {
-        const key = `${STORAGE_KEY_PREFIX}${accountId}`;
-        localStorage.removeItem(key);
-    } catch (error) {
-        console.error('Failed to clear import configuration:', error);
-    }
-}
diff --git a/routes/api.php b/routes/api.php
index 8cc9eeac..030fb3d9 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -2,6 +2,7 @@
 
 use App\Http\Controllers\AccountBalanceController;
 use App\Http\Controllers\Api\AccountController;
+use App\Http\Controllers\Api\AccountImportConfigController;
 use App\Http\Controllers\Api\CashflowAnalyticsController;
 use App\Http\Controllers\Api\CategoryMonthlyBreakdownController;
 use App\Http\Controllers\Api\DashboardAnalyticsController;
@@ -38,6 +39,10 @@ Route::middleware(['web', 'auth', 'throttle:300,1'])->group(function () {
     Route::get('accounts', [AccountController::class, 'index'])->name('api.accounts.index');
     Route::put('accounts/{account}', [AccountController::class, 'update'])->name('api.accounts.update');
 
+    // Account import configuration (per-account column mapping, synced across devices)
+    Route::get('accounts/{account}/import-config', [AccountImportConfigController::class, 'show'])->name('api.accounts.import-config.show');
+    Route::put('accounts/{account}/import-config', [AccountImportConfigController::class, 'update'])->name('api.accounts.import-config.update');
+
     // Account Balances
     Route::put('accounts/{account}/balance/current', [AccountBalanceController::class, 'updateCurrent'])->name('api.accounts.balance.update-current');
     Route::get('accounts/{account}/balances', [AccountBalanceController::class, 'index'])->name('api.accounts.balances.index');
diff --git a/tests/Feature/AccountImportConfigTest.php b/tests/Feature/AccountImportConfigTest.php
new file mode 100644
index 00000000..a91faff7
--- /dev/null
+++ b/tests/Feature/AccountImportConfigTest.php
@@ -0,0 +1,114 @@
+<?php
+
+use App\Models\Account;
+use App\Models\AccountImportConfig;
+use App\Models\User;
+
+beforeEach(function () {
+    $this->user = User::factory()->create();
+    $this->account = Account::factory()->create(['user_id' => $this->user->id]);
+    $this->actingAs($this->user);
+});
+
+$transactionConfig = [
+    'columnMapping' => [
+        'transaction_date' => 'Date',
+        'description' => 'Concept',
+        'amount' => 'Amount',
+        'balance' => null,
+        'creditor_name' => null,
+        'debtor_name' => null,
+    ],
+    'dateFormat' => 'DD-MM-YYYY',
+];
+
+test('import config endpoints require authentication', function () {
+    auth()->logout();
+
+    $this->getJson("/api/accounts/{$this->account->id}/import-config?type=transaction")
+        ->assertUnauthorized();
+});
+
+test('returns null when no config is saved yet', function () {
+    $this->getJson("/api/accounts/{$this->account->id}/import-config?type=transaction")
+        ->assertOk()
+        ->assertJsonPath('data', null);
+});
+
+test('saves and returns an import config for an account', function () use ($transactionConfig) {
+    $this->putJson("/api/accounts/{$this->account->id}/import-config", [
+        'type' => 'transaction',
+        'config' => $transactionConfig,
+    ])
+        ->assertOk()
+        ->assertJsonPath('data.dateFormat', 'DD-MM-YYYY')
+        ->assertJsonPath('data.columnMapping.description', 'Concept');
+
+    $this->assertDatabaseHas('account_import_configs', [
+        'account_id' => $this->account->id,
+        'type' => 'transaction',
+    ]);
+
+    $this->getJson("/api/accounts/{$this->account->id}/import-config?type=transaction")
+        ->assertOk()
+        ->assertJsonPath('data.dateFormat', 'DD-MM-YYYY');
+});
+
+test('upserts the config instead of creating duplicates', function () use ($transactionConfig) {
+    $url = "/api/accounts/{$this->account->id}/import-config";
+
+    $this->putJson($url, ['type' => 'transaction', 'config' => $transactionConfig])->assertOk();
+
+    $updated = $transactionConfig;
+    $updated['dateFormat'] = 'YYYY-MM-DD';
+    $this->putJson($url, ['type' => 'transaction', 'config' => $updated])->assertOk();
+
+    expect(AccountImportConfig::where('account_id', $this->account->id)->count())->toBe(1);
+    $this->getJson("{$url}?type=transaction")
+        ->assertJsonPath('data.dateFormat', 'YYYY-MM-DD');
+});
+
+test('transaction and balance configs are stored independently', function () use ($transactionConfig) {
+    $url = "/api/accounts/{$this->account->id}/import-config";
+    $balanceConfig = [
+        'columnMapping' => ['balance_date' => 'Date', 'balance' => 'Saldo', 'invested_amount' => null],
+        'dateFormat' => 'YYYY-MM-DD',
+    ];
+
+    $this->putJson($url, ['type' => 'transaction', 'config' => $transactionConfig])->assertOk();
+    $this->putJson($url, ['type' => 'balance', 'config' => $balanceConfig])->assertOk();
+
+    expect(AccountImportConfig::where('account_id', $this->account->id)->count())->toBe(2);
+    $this->getJson("{$url}?type=balance")
+        ->assertJsonPath('data.columnMapping.balance', 'Saldo');
+});
+
+test('cannot read the import config of another user account', function () {
+    $otherAccount = Account::factory()->create();
+
+    $this->getJson("/api/accounts/{$otherAccount->id}/import-config?type=transaction")
+        ->assertForbidden();
+});
+
+test('cannot write the import config of another user account', function () use ($transactionConfig) {
+    $otherAccount = Account::factory()->create();
+
+    $this->putJson("/api/accounts/{$otherAccount->id}/import-config", [
+        'type' => 'transaction',
+        'config' => $transactionConfig,
+    ])->assertForbidden();
+});
+
+test('rejects an unknown config type', function () use ($transactionConfig) {
+    $this->putJson("/api/accounts/{$this->account->id}/import-config", [
+        'type' => 'nonsense',
+        'config' => $transactionConfig,
+    ])->assertJsonValidationErrors('type');
+});
+
+test('rejects a config without a column mapping', function () {
+    $this->putJson("/api/accounts/{$this->account->id}/import-config", [
+        'type' => 'transaction',
+        'config' => ['dateFormat' => 'YYYY-MM-DD'],
+    ])->assertJsonValidationErrors('config.columnMapping');
+});