diff --git a/core/src/main/java/bisq/core/api/model/PaymentAccountForm.java b/core/src/main/java/bisq/core/api/model/PaymentAccountForm.java
index 144baa264f..9a741adc1f 100644
--- a/core/src/main/java/bisq/core/api/model/PaymentAccountForm.java
+++ b/core/src/main/java/bisq/core/api/model/PaymentAccountForm.java
@@ -67,6 +67,7 @@ public final class PaymentAccountForm implements PersistablePayload {
     public enum FormId {
         REVOLUT,
         SEPA,
+        SEPA_INSTANT,
         TRANSFERWISE,
         CLEAR_X_CHANGE,
         SWIFT,
diff --git a/core/src/main/java/bisq/core/payment/SepaAccount.java b/core/src/main/java/bisq/core/payment/SepaAccount.java
index 2f35ef48cf..c27a7aff62 100644
--- a/core/src/main/java/bisq/core/payment/SepaAccount.java
+++ b/core/src/main/java/bisq/core/payment/SepaAccount.java
@@ -36,7 +36,7 @@ import org.jetbrains.annotations.NotNull;
 @EqualsAndHashCode(callSuper = true)
 public final class SepaAccount extends CountryBasedPaymentAccount implements BankAccount {
 
-    private static final List<PaymentAccountFormField.FieldId> INPUT_FIELD_IDS = List.of(
+    protected static final List<PaymentAccountFormField.FieldId> INPUT_FIELD_IDS = List.of(
             PaymentAccountFormField.FieldId.ACCOUNT_NAME,
             PaymentAccountFormField.FieldId.HOLDER_NAME,
             PaymentAccountFormField.FieldId.IBAN,
@@ -142,7 +142,7 @@ public final class SepaAccount extends CountryBasedPaymentAccount implements Ban
             super.validateFormField(form, fieldId, value);
         }
     }
-    
+
     @Override
     protected PaymentAccountFormField getEmptyFormField(PaymentAccountFormField.FieldId fieldId) {
         var field = super.getEmptyFormField(fieldId);
diff --git a/core/src/main/java/bisq/core/payment/SepaInstantAccount.java b/core/src/main/java/bisq/core/payment/SepaInstantAccount.java
index 9102de77d2..a026d2c63e 100644
--- a/core/src/main/java/bisq/core/payment/SepaInstantAccount.java
+++ b/core/src/main/java/bisq/core/payment/SepaInstantAccount.java
@@ -17,16 +17,18 @@
 
 package bisq.core.payment;
 
+import bisq.core.api.model.PaymentAccountForm;
 import bisq.core.api.model.PaymentAccountFormField;
+import bisq.core.locale.Country;
 import bisq.core.locale.CountryUtil;
 import bisq.core.locale.FiatCurrency;
 import bisq.core.locale.TradeCurrency;
 import bisq.core.payment.payload.PaymentAccountPayload;
 import bisq.core.payment.payload.PaymentMethod;
 import bisq.core.payment.payload.SepaInstantAccountPayload;
-
+import bisq.core.payment.validation.SepaIBANValidator;
 import java.util.List;
-
+import javax.annotation.Nullable;
 import lombok.EqualsAndHashCode;
 
 import org.jetbrains.annotations.NotNull;
@@ -100,13 +102,44 @@ public final class SepaInstantAccount extends CountryBasedPaymentAccount impleme
         ((SepaInstantAccountPayload) paymentAccountPayload).revertChanges();
     }
 
+    @Override
+    public @NotNull List<PaymentAccountFormField.FieldId> getInputFieldIds() {
+        return SepaAccount.INPUT_FIELD_IDS;
+    }
+
     @Override
     public @NotNull List<TradeCurrency> getSupportedCurrencies() {
         return SUPPORTED_CURRENCIES;
     }
 
     @Override
-    public @NotNull List<PaymentAccountFormField.FieldId> getInputFieldIds() {
-        throw new RuntimeException("Not implemented");
+    @Nullable
+    public List<Country> getSupportedCountries() {
+        return CountryUtil.getAllSepaCountries();
+    }
+
+    @Override
+    public void validateFormField(PaymentAccountForm form, PaymentAccountFormField.FieldId fieldId, String value) {
+        switch (fieldId) {
+        case IBAN:
+            processValidationResult(new SepaIBANValidator().validate(value));
+            break;
+        default:
+            super.validateFormField(form, fieldId, value);
+        }
+    }
+
+    @Override
+    protected PaymentAccountFormField getEmptyFormField(PaymentAccountFormField.FieldId fieldId) {
+        var field = super.getEmptyFormField(fieldId);
+        switch (fieldId) {
+        case ACCEPTED_COUNTRY_CODES:
+            field.setSupportedSepaEuroCountries(CountryUtil.getAllSepaEuroCountries());
+            field.setSupportedSepaNonEuroCountries(CountryUtil.getAllSepaNonEuroCountries());
+            break;
+        default:
+            // no action
+        }
+        return field;
     }
 }
diff --git a/core/src/main/java/bisq/core/payment/payload/PaymentMethod.java b/core/src/main/java/bisq/core/payment/payload/PaymentMethod.java
index 69f03f67ca..673a672bed 100644
--- a/core/src/main/java/bisq/core/payment/payload/PaymentMethod.java
+++ b/core/src/main/java/bisq/core/payment/payload/PaymentMethod.java
@@ -330,6 +330,7 @@ public final class PaymentMethod implements PersistablePayload, Comparable<Payme
         List<String> paymentMethodIds = List.of(
                 REVOLUT_ID,
                 SEPA_ID,
+                SEPA_INSTANT_ID,
                 TRANSFERWISE_ID,
                 CLEAR_X_CHANGE_ID,
                 SWIFT_ID,
diff --git a/proto/src/main/proto/pb.proto b/proto/src/main/proto/pb.proto
index e2b0570672..1671b9407a 100644
--- a/proto/src/main/proto/pb.proto
+++ b/proto/src/main/proto/pb.proto
@@ -2076,12 +2076,13 @@ message PaymentAccountForm {
     enum FormId {
         REVOLUT = 0;
         SEPA = 1;
-        TRANSFERWISE = 2;
-        CLEAR_X_CHANGE = 3;
-        SWIFT = 4;
-        F2F = 5;
-        STRIKE = 6;
-        MONEY_GRAM = 7;
+        SEPA_INSTANT = 2;
+        TRANSFERWISE = 3;
+        CLEAR_X_CHANGE = 4;
+        SWIFT = 5;
+        F2F = 6;
+        STRIKE = 7;
+        MONEY_GRAM = 8;
     }
     FormId id = 1;
     repeated PaymentAccountFormField fields = 2;