diff --git a/src/Config/Config.php b/src/Config/Config.php
index 72c91d6..946dbe0 100644
--- a/src/Config/Config.php
+++ b/src/Config/Config.php
@@ -36,6 +36,11 @@ class Config
 	CONST VALIDATE_COMPANY_CONFIG_KEY = 'WS_VATCHECK_VALIDATE_COMPANY';
 	CONST VALIDATE_COMPANY_DEFAULT = false;
 
+	// Configuration key holding the admin-selected list of EU countries allowed
+	// to order VAT-free (JSON-encoded array of ISO codes). Absent/empty means
+	// "all countries VatNumber::$euIso supports" — see EuCountryAllowList.
+	CONST EU_COUNTRIES_CONFIG_KEY = 'WS_VATCHECK_EU_COUNTRIES';
+
 	// Article 39bis W.BTW intra-community exemption notice, per invoice language.
 	CONST INTRACOMMUNITY_EXEMPTION_TEXTS = [
 		'nl' => 'Vrijgestelde intracommunautaire levering – artikel 39bis W.BTW',
diff --git a/src/Model/EuCountryAllowList.php b/src/Model/EuCountryAllowList.php
new file mode 100644
index 0000000..67095ef
--- /dev/null
+++ b/src/Model/EuCountryAllowList.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace Websmid\VatCheck\Model;
+
+use Websmid\VatCheck\Config\Config;
+use Configuration;
+
+class EuCountryAllowList
+{
+    /**
+     * Every ISO code VatNumber knows a VAT prefix/format for — the maximum
+     * possible set an admin could enable.
+     */
+    public static function getAllSupportedIsoCodes(): array
+    {
+        return array_keys(VatNumber::$euIso);
+    }
+
+    /**
+     * Falls back to "all supported countries" when nothing has been configured
+     * yet, so a fresh install/upgrade doesn't silently narrow existing behavior.
+     * Intersects against the supported set so a stale stored code can never
+     * make it back out.
+     */
+    public static function getEnabledIsoCodes(): array
+    {
+        $stored = json_decode((string) Configuration::get(Config::EU_COUNTRIES_CONFIG_KEY), true);
+
+        if (empty($stored) || !is_array($stored)) {
+            return self::getAllSupportedIsoCodes();
+        }
+
+        return array_values(array_intersect($stored, self::getAllSupportedIsoCodes()));
+    }
+
+    public static function isEnabled(string $isoCode): bool
+    {
+        return in_array($isoCode, self::getEnabledIsoCodes(), true);
+    }
+}
diff --git a/src/Module/Admin/SettingsForm.php b/src/Module/Admin/SettingsForm.php
index a9914b5..68cee5f 100644
--- a/src/Module/Admin/SettingsForm.php
+++ b/src/Module/Admin/SettingsForm.php
@@ -3,10 +3,12 @@
 namespace Websmid\VatCheck\Module\Admin;
 
 use Websmid\VatCheck\Config\Config;
+use Websmid\VatCheck\Model\EuCountryAllowList;
 use Configuration;
 use Tools;
 use HelperForm;
 use Context;
+use Country;
 
 trait SettingsForm
 {
@@ -31,6 +33,15 @@ trait SettingsForm
             Config::VALIDATE_COMPANY_CONFIG_KEY,
             (bool) Tools::getValue(Config::VALIDATE_COMPANY_CONFIG_KEY)
         );
+
+        $enabledIsoCodes = [];
+        foreach (EuCountryAllowList::getAllSupportedIsoCodes() as $isoCode) {
+            if (Tools::getValue(Config::EU_COUNTRIES_CONFIG_KEY . '_' . $isoCode)) {
+                $enabledIsoCodes[] = $isoCode;
+            }
+        }
+
+        Configuration::updateValue(Config::EU_COUNTRIES_CONFIG_KEY, json_encode($enabledIsoCodes));
     }
 
     private function renderSettingsForm()
@@ -77,7 +88,34 @@ trait SettingsForm
                 null,
                 Config::VALIDATE_COMPANY_DEFAULT
             ),
-        ];
+        ] + $this->getEnabledCountriesFormValues();
+    }
+
+    private function getEnabledCountriesFormValues()
+    {
+        $values = [];
+        foreach (EuCountryAllowList::getEnabledIsoCodes() as $isoCode) {
+            $values[Config::EU_COUNTRIES_CONFIG_KEY . '_' . $isoCode] = true;
+        }
+
+        return $values;
+    }
+
+    private function getCountryChoices()
+    {
+        $supported = EuCountryAllowList::getAllSupportedIsoCodes();
+        $choices = [];
+
+        foreach (Country::getCountries(Context::getContext()->language->id) as $country) {
+            if (in_array($country['iso_code'], $supported, true)) {
+                $choices[] = [
+                    'id' => $country['iso_code'],
+                    'name' => $country['name'] . ' (' . $country['iso_code'] . ')',
+                ];
+            }
+        }
+
+        return $choices;
     }
 
     private function getSettingsFormStructure()
@@ -132,6 +170,23 @@ trait SettingsForm
                             ],
                         ],
                     ],
+                    [
+                        'type' => 'checkbox',
+                        'label' => $this->trans('Enabled EU countries', [], 'Modules.Ws_VatCheck.Admin'),
+                        'name' => Config::EU_COUNTRIES_CONFIG_KEY,
+                        'multiple' => true,
+                        'desc' => $this->trans(
+                            'Countries a customer can order VAT-free from with a valid VAT number.',
+                            [],
+                            'Modules.Ws_VatCheck.Admin'
+                        ),
+                        'values' => [
+                            'query' => $this->getCountryChoices(),
+                            'id' => 'id',
+                            'name' => 'name',
+                            'value' => 'id',
+                        ],
+                    ],
                 ],
                 'submit' => [
                     'title' => $this->trans('Save', [], 'Admin.Actions'),
diff --git a/src/Module/Front/FrontHooks.php b/src/Module/Front/FrontHooks.php
index 0ce89d2..b5cb7cc 100644
--- a/src/Module/Front/FrontHooks.php
+++ b/src/Module/Front/FrontHooks.php
@@ -4,6 +4,7 @@ namespace Websmid\VatCheck\Module\Front;
 
 use Websmid\VatCheck\TaxManager\CacheTaxManager;
 use Websmid\VatCheck\Model\VatNumber;
+use Websmid\VatCheck\Model\EuCountryAllowList;
 use Websmid\VatCheck\Config\Config;
 use Address;
 use Configuration;
@@ -27,7 +28,7 @@ trait FrontHooks
         $countryIso = (string)Country::getIsoById((string)$form->getValue('id_country'));
         $vatNumber = new VatNumber($vatNumber, $countryIso);
 
-        if( $vatNumber->isNotEuIso() ){
+        if( $vatNumber->isNotEuIso() || !EuCountryAllowList::isEnabled($countryIso) ){
             return true;
         }
 
diff --git a/src/Module/Install.php b/src/Module/Install.php
index ac0c931..faec900 100644
--- a/src/Module/Install.php
+++ b/src/Module/Install.php
@@ -3,6 +3,7 @@
 namespace Websmid\VatCheck\Module;
 
 use Websmid\VatCheck\Config\Config;
+use Websmid\VatCheck\Model\EuCountryAllowList;
 use Db;
 use Configuration;
 
@@ -39,6 +40,13 @@ trait Install
             return false;
         }
 
+        if (!Configuration::updateValue(
+            Config::EU_COUNTRIES_CONFIG_KEY,
+            json_encode(EuCountryAllowList::getAllSupportedIsoCodes())
+        )) {
+            return false;
+        }
+
         return true;
     }
 
diff --git a/src/TaxManager/CacheTaxManager.php b/src/TaxManager/CacheTaxManager.php
index 014c159..46cc7c9 100644
--- a/src/TaxManager/CacheTaxManager.php
+++ b/src/TaxManager/CacheTaxManager.php
@@ -12,6 +12,7 @@ use Configuration;
 use Context;
 use Websmid\VatCheck\Model\VatCache;
 use Websmid\VatCheck\Model\VatNumber;
+use Websmid\VatCheck\Model\EuCountryAllowList;
 use Websmid\VatCheck\Adapter\EuValidatorAdapter;
 
 class CacheTaxManager implements TaxManagerInterface
@@ -27,7 +28,7 @@ class CacheTaxManager implements TaxManagerInterface
         }
 
         $isoCode = Country::getIsoById((int)$address->id_country);
-        if( !array_key_exists($isoCode, VatNumber::$euIso) ){
+        if( !EuCountryAllowList::isEnabled($isoCode) ){
             return false;
         }
 
diff --git a/upgrade/upgrade-1.0.3.php b/upgrade/upgrade-1.0.3.php
index a92a5e0..d2d8d57 100644
--- a/upgrade/upgrade-1.0.3.php
+++ b/upgrade/upgrade-1.0.3.php
@@ -1,6 +1,7 @@
 <?php
 
 use Websmid\VatCheck\Config\Config;
+use Websmid\VatCheck\Model\EuCountryAllowList;
 
 if (!defined('_PS_VERSION_')) {
     exit;
@@ -12,5 +13,14 @@ function upgrade_module_1_0_3($module)
         return false;
     }
 
-    return Configuration::updateValue(Config::VALIDATE_COMPANY_CONFIG_KEY, Config::VALIDATE_COMPANY_DEFAULT);
+    if (!Configuration::updateValue(Config::VALIDATE_COMPANY_CONFIG_KEY, Config::VALIDATE_COMPANY_DEFAULT)) {
+        return false;
+    }
+
+    // All countries enabled by default, so upgrading doesn't silently narrow
+    // exemption eligibility for a shop already relying on the old behavior.
+    return Configuration::updateValue(
+        Config::EU_COUNTRIES_CONFIG_KEY,
+        json_encode(EuCountryAllowList::getAllSupportedIsoCodes())
+    );
 }