diff --git a/core/src/main/java/google/registry/model/registrar/Registrar.java b/core/src/main/java/google/registry/model/registrar/Registrar.java
index 203ed0a24..8084c0de4 100644
--- a/core/src/main/java/google/registry/model/registrar/Registrar.java
+++ b/core/src/main/java/google/registry/model/registrar/Registrar.java
@@ -37,6 +37,7 @@ import static google.registry.persistence.transaction.TransactionManagerFactory.
 import static google.registry.persistence.transaction.TransactionManagerUtil.transactIfJpaTm;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableCopy;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableSortedCopy;
+import static google.registry.util.DateTimeUtils.START_OF_TIME;
 import static google.registry.util.PasswordUtils.SALT_SUPPLIER;
 import static google.registry.util.PasswordUtils.hashPassword;
 import static google.registry.util.PreconditionsUtils.checkArgumentNotNull;
@@ -458,6 +459,14 @@ public class Registrar extends ImmutableObject
   /** The time that the certificate was last updated. */
   DateTime lastCertificateUpdateTime;
 
+  /** The time that an expiring certificate notification email was sent to the registrar. */
+  DateTime lastExpiringCertNotificationSentDate = START_OF_TIME;
+
+  /**
+   * The time that an expiring failover certificate notification email was sent to the registrar.
+   */
+  DateTime lastExpiringFailoverCertNotificationSentDate = START_OF_TIME;
+
   /** Telephone support passcode (5-digit numeric) */
   String phonePasscode;
 
@@ -508,6 +517,14 @@ public class Registrar extends ImmutableObject
     return lastCertificateUpdateTime;
   }
 
+  public DateTime getLastExpiringCertNotificationSentDate() {
+    return lastExpiringCertNotificationSentDate;
+  }
+
+  public DateTime getLastExpiringFailoverCertNotificationSentDate() {
+    return lastExpiringFailoverCertNotificationSentDate;
+  }
+
   public String getRegistrarName() {
     return registrarName;
   }
@@ -671,6 +688,10 @@ public class Registrar extends ImmutableObject
         .putString("creationTime", creationTime.getTimestamp())
         .putString("lastUpdateTime", lastUpdateTime.getTimestamp())
         .putString("lastCertificateUpdateTime", lastCertificateUpdateTime)
+        .putString("lastExpiringCertNotificationSentDate", lastExpiringCertNotificationSentDate)
+        .putString(
+            "lastExpiringFailoverCertNotificationSentDate",
+            lastExpiringFailoverCertNotificationSentDate)
         .put("registrarName", registrarName)
         .put("type", type)
         .put("state", state)
@@ -839,6 +860,19 @@ public class Registrar extends ImmutableObject
       return this;
     }
 
+    public Builder setLastExpiringCertNotificationSentDate(DateTime now) {
+      checkArgumentNotNull(now, "Registrar lastExpiringCertNotificationSentDate cannot be null");
+      getInstance().lastExpiringCertNotificationSentDate = now;
+      return this;
+    }
+
+    public Builder setLastExpiringFailoverCertNotificationSentDate(DateTime now) {
+      checkArgumentNotNull(
+          now, "Registrar lastExpiringFailoverCertNotificationSentDate cannot be null");
+      getInstance().lastExpiringFailoverCertNotificationSentDate = now;
+      return this;
+    }
+
     public Builder setFailoverClientCertificate(String clientCertificate, DateTime now) {
       clientCertificate = emptyToNull(clientCertificate);
       String clientCertificateHash = calculateHash(clientCertificate);
diff --git a/core/src/test/java/google/registry/model/registrar/RegistrarTest.java b/core/src/test/java/google/registry/model/registrar/RegistrarTest.java
index 6f609c4d9..5cf2c05b7 100644
--- a/core/src/test/java/google/registry/model/registrar/RegistrarTest.java
+++ b/core/src/test/java/google/registry/model/registrar/RegistrarTest.java
@@ -29,6 +29,7 @@ import static google.registry.testing.DatabaseHelper.newRegistry;
 import static google.registry.testing.DatabaseHelper.persistResource;
 import static google.registry.testing.DatabaseHelper.persistSimpleResource;
 import static google.registry.testing.DatabaseHelper.persistSimpleResources;
+import static google.registry.util.DateTimeUtils.START_OF_TIME;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import com.google.common.collect.ImmutableList;
@@ -414,6 +415,64 @@ class RegistrarTest extends EntityTestCase {
         IllegalArgumentException.class, () -> new Registrar.Builder().setPhonePasscode("code1"));
   }
 
+  @TestOfyAndSql
+  void testSuccess_getLastExpiringCertNotificationSentDate_returnsInitialValue() {
+    assertThat(registrar.getLastExpiringCertNotificationSentDate()).isEqualTo(START_OF_TIME);
+  }
+
+  @TestOfyAndSql
+  void testSuccess_getLastExpiringFailoverCertNotificationSentDate_returnsInitialValue() {
+    assertThat(registrar.getLastExpiringFailoverCertNotificationSentDate())
+        .isEqualTo(START_OF_TIME);
+  }
+
+  @TestOfyAndSql
+  void testSuccess_setLastExpiringCertNotificationSentDate() {
+    assertThat(
+            registrar
+                .asBuilder()
+                .setLastExpiringCertNotificationSentDate(fakeClock.nowUtc())
+                .build()
+                .getLastExpiringCertNotificationSentDate())
+        .isEqualTo(fakeClock.nowUtc());
+  }
+
+  @TestOfyAndSql
+  void testFailure_setLastExpiringCertNotificationSentDate_nullDate() {
+    IllegalArgumentException thrown =
+        assertThrows(
+            IllegalArgumentException.class,
+            () -> new Registrar.Builder().setLastExpiringCertNotificationSentDate(null).build());
+    assertThat(thrown)
+        .hasMessageThat()
+        .isEqualTo("Registrar lastExpiringCertNotificationSentDate cannot be null");
+  }
+
+  @TestOfyAndSql
+  void testSuccess_setLastExpiringFailoverCertNotificationSentDate() {
+    assertThat(
+            registrar
+                .asBuilder()
+                .setLastExpiringFailoverCertNotificationSentDate(fakeClock.nowUtc())
+                .build()
+                .getLastExpiringFailoverCertNotificationSentDate())
+        .isEqualTo(fakeClock.nowUtc());
+  }
+
+  @TestOfyAndSql
+  void testFailure_setLastExpiringFailoverCertNotificationSentDate_nullDate() {
+    IllegalArgumentException thrown =
+        assertThrows(
+            IllegalArgumentException.class,
+            () ->
+                new Registrar.Builder()
+                    .setLastExpiringFailoverCertNotificationSentDate(null)
+                    .build());
+    assertThat(thrown)
+        .hasMessageThat()
+        .isEqualTo("Registrar lastExpiringFailoverCertNotificationSentDate cannot be null");
+  }
+
   @TestOfyAndSql
   void testSuccess_setAllowedTlds() {
     assertThat(
diff --git a/core/src/test/resources/google/registry/model/schema.txt b/core/src/test/resources/google/registry/model/schema.txt
index e45717468..c3a8555c0 100644
--- a/core/src/test/resources/google/registry/model/schema.txt
+++ b/core/src/test/resources/google/registry/model/schema.txt
@@ -600,6 +600,8 @@ class google.registry.model.registrar.Registrar {
   java.util.Set<java.lang.String> allowedTlds;
   java.util.Set<java.lang.String> rdapBaseUrls;
   org.joda.time.DateTime lastCertificateUpdateTime;
+  org.joda.time.DateTime lastExpiringCertNotificationSentDate;
+  org.joda.time.DateTime lastExpiringFailoverCertNotificationSentDate;
 }
 class google.registry.model.registrar.Registrar$BillingAccountEntry {
   java.lang.String accountId;
diff --git a/db/src/main/resources/sql/schema/db-schema.sql.generated b/db/src/main/resources/sql/schema/db-schema.sql.generated
index f21f543cb..e0ea31f8c 100644
--- a/db/src/main/resources/sql/schema/db-schema.sql.generated
+++ b/db/src/main/resources/sql/schema/db-schema.sql.generated
@@ -581,6 +581,8 @@
         i18n_address_zip text,
         ip_address_allow_list text[],
         last_certificate_update_time timestamptz,
+        last_expiring_cert_notification_sent_date timestamptz,
+        last_expiring_failover_cert_notification_sent_date timestamptz,
         last_update_time timestamptz not null,
         localized_address_city text,
         localized_address_country_code text,