diff --git a/api/http/common.go b/api/http/common.go
index 5f38d4905d..7a02050b7d 100644
--- a/api/http/common.go
+++ b/api/http/common.go
@@ -233,7 +233,8 @@ func EncodeError(_ context.Context, err error, w http.ResponseWriter) {
 		errors.Contains(err, apiutil.ErrMissingRoleMembers),
 		errors.Contains(err, apiutil.ErrMissingDescription),
 		errors.Contains(err, apiutil.ErrMissingEntityID),
-		errors.Contains(err, apiutil.ErrInvalidRouteFormat):
+		errors.Contains(err, apiutil.ErrInvalidRouteFormat),
+		errors.Contains(err, svcerr.ErrRetainOneMember):
 		err = unwrap(err)
 		w.WriteHeader(http.StatusBadRequest)
 
diff --git a/domains/service.go b/domains/service.go
index 68f2d06623..a2346b6cb6 100644
--- a/domains/service.go
+++ b/domains/service.go
@@ -351,15 +351,40 @@ func (svc *service) RemoveEntityMembers(ctx context.Context, session authn.Sessi
 	return svc.ProvisionManageService.RemoveEntityMembers(ctx, session, entityID, members)
 }
 
-func (svc *service) RoleRemoveMembers(ctx context.Context, session authn.Session, entityID, roleID string, members []string) (err error) {
-	for _, member := range members {
-		if err := svc.repo.DeleteInvitation(ctx, member, entityID); err != nil && err != repoerr.ErrNotFound {
+func (svc *service) RoleRemoveMembers(ctx context.Context, session authn.Session, entityID, roleID string, members []string) error {
+	ro, err := svc.repo.RetrieveEntityRole(ctx, entityID, roleID)
+	if err != nil {
+		return errors.Wrap(svcerr.ErrViewEntity, err)
+	}
+
+	if _, err := svc.ProvisionManageService.BuiltInRoleActions(roles.BuiltInRoleName(ro.Name)); err == nil {
+		membersPage, err := svc.repo.RoleListMembers(ctx, ro.ID, 0, 0)
+		if err != nil {
+			return errors.Wrap(svcerr.ErrViewEntity, err)
+		}
+		if membersPage.Total <= uint64(len(members)) {
+			return svcerr.ErrRetainOneMember
+		}
+	}
+
+	for _, memberID := range members {
+		if err := svc.repo.DeleteInvitation(ctx, memberID, entityID); err != nil && err != repoerr.ErrNotFound {
 			return err
 		}
 	}
+
 	return svc.ProvisionManageService.RoleRemoveMembers(ctx, session, entityID, roleID, members)
 }
 
-func (svc *service) RoleRemoveAllMembers(ctx context.Context, session authn.Session, entityID, roleID string) (err error) {
-	return svcerr.ErrNotFound
+func (svc *service) RoleRemoveAllMembers(ctx context.Context, session authn.Session, entityID, roleID string) error {
+	ro, err := svc.repo.RetrieveEntityRole(ctx, entityID, roleID)
+	if err != nil {
+		return errors.Wrap(svcerr.ErrViewEntity, err)
+	}
+
+	if _, err := svc.ProvisionManageService.BuiltInRoleActions(roles.BuiltInRoleName(ro.Name)); err == nil {
+		return svcerr.ErrRetainOneMember
+	}
+
+	return svc.ProvisionManageService.RoleRemoveAllMembers(ctx, session, entityID, roleID)
 }
diff --git a/pkg/errors/service/types.go b/pkg/errors/service/types.go
index 928a2268b4..cbd353205c 100644
--- a/pkg/errors/service/types.go
+++ b/pkg/errors/service/types.go
@@ -87,4 +87,7 @@ var (
 
 	// ErrUnauthorizedPAT indicates failure occurred while authorizing PAT.
 	ErrUnauthorizedPAT = errors.New("failed to authorize PAT")
+
+	// ErrRetainOneMember indicates that at least one owner must be retained in the entity.
+	ErrRetainOneMember = errors.New("must retain at least one member")
 )
diff --git a/pkg/roles/provisionmanage.go b/pkg/roles/provisionmanage.go
index 4481bd749d..2a20e47cc5 100644
--- a/pkg/roles/provisionmanage.go
+++ b/pkg/roles/provisionmanage.go
@@ -49,6 +49,14 @@ func NewProvisionManageService(entityType string, repo Repository, policy polici
 	return rm, nil
 }
 
+func (pms ProvisionManageService) BuiltInRoleActions(name BuiltInRoleName) ([]Action, error) {
+	actions, ok := pms.builtInRoles[name]
+	if !ok {
+		return nil, errors.Wrap(svcerr.ErrNotFound, fmt.Errorf("role %s not found", name))
+	}
+	return actions, nil
+}
+
 func toRolesActions(actions []string) []Action {
 	roActions := []Action{}
 	for _, action := range actions {