diff --git a/faker/providers/bank/en_IE/__init__.py b/faker/providers/bank/en_IE/__init__.py
index 99793af284..67ec6a665c 100644
--- a/faker/providers/bank/en_IE/__init__.py
+++ b/faker/providers/bank/en_IE/__init__.py
@@ -4,5 +4,5 @@
 class Provider(BankProvider):
     """Implement bank provider for ``en_IE`` locale."""
 
-    bban_format = "#######################"
+    bban_format = "????##############"
     country_code = "IE"
diff --git a/tests/providers/test_bank.py b/tests/providers/test_bank.py
index 218708c777..35c43d0781 100644
--- a/tests/providers/test_bank.py
+++ b/tests/providers/test_bank.py
@@ -174,14 +174,14 @@ class TestEnIe:
 
     def test_bban(self, faker, num_samples):
         for _ in range(num_samples):
-            assert re.fullmatch(r"\d{23}", faker.bban())
+            assert re.fullmatch(r"[A-Z]{4}\d{14}", faker.bban())
 
     def test_iban(self, faker, num_samples):
         for _ in range(num_samples):
             iban = faker.iban()
             assert is_valid_iban(iban)
             assert iban[:2] == EnIeBankProvider.country_code
-            assert re.fullmatch(r"\d{2}\d{23}", iban[2:])
+            assert re.fullmatch(r"\d{2}[A-Z]{4}\d{14}", iban[2:])
 
 
 class TestEnIn: