diff --git a/api/v1/common_types.go b/api/v1/common_types.go
index f4ee1295..ae9a7868 100644
--- a/api/v1/common_types.go
+++ b/api/v1/common_types.go
@@ -19,6 +19,8 @@ const (
 
 	ReconciliationDisabledReason  = "ReconciliationDisabled"
 	ReconciliationDisabledMessage = "Reconciliation is disabled"
+
+	HealthCheckExpr = "status.conditions.filter(c, c.type == 'Ready').all(c, c.status == 'True' && c.observedGeneration == metadata.generation)"
 )
 
 var (
diff --git a/internal/controller/resourceset_controller.go b/internal/controller/resourceset_controller.go
index 3dd263a7..412982b6 100644
--- a/internal/controller/resourceset_controller.go
+++ b/internal/controller/resourceset_controller.go
@@ -14,6 +14,7 @@ import (
 	"github.com/fluxcd/cli-utils/pkg/kstatus/polling/engine"
 	"github.com/fluxcd/cli-utils/pkg/kstatus/status"
 	"github.com/fluxcd/cli-utils/pkg/object"
+	"github.com/fluxcd/pkg/apis/kustomize"
 	"github.com/fluxcd/pkg/apis/meta"
 	"github.com/fluxcd/pkg/runtime/cel"
 	runtimeClient "github.com/fluxcd/pkg/runtime/client"
@@ -314,7 +315,9 @@ func (r *ResourceSetReconciler) checkDependencies(ctx context.Context,
 		}
 
 		if dep.Ready {
-			if dep.ReadyExpr != "" {
+			switch {
+			// Custom CEL ready expression.
+			case dep.ReadyExpr != "":
 				isReady, err := exprs[i].EvaluateBoolean(ctx, depObj.UnstructuredContent())
 				if err != nil {
 					return err
@@ -323,7 +326,23 @@ func (r *ResourceSetReconciler) checkDependencies(ctx context.Context,
 				if !isReady {
 					return fmt.Errorf("dependency %s/%s not ready: expression '%s'", dep.APIVersion, ssautil.FmtObjMetadata(depMd), dep.ReadyExpr)
 				}
-			} else {
+			// Built-in CEL ready expression for ResourceSet and ResourceSetInputProvider.
+			case dep.Kind == fluxcdv1.ResourceSetKind || dep.Kind == fluxcdv1.ResourceSetInputProviderKind:
+				expr, err := cel.NewExpression(fluxcdv1.HealthCheckExpr)
+				if err != nil {
+					return err
+				}
+
+				isReady, err := expr.EvaluateBoolean(ctx, depObj.UnstructuredContent())
+				if err != nil {
+					return err
+				}
+
+				if !isReady {
+					return fmt.Errorf("dependency %s/%s not ready", dep.APIVersion, ssautil.FmtObjMetadata(depMd))
+				}
+			// Default status check using kstatus.
+			default:
 				stat, err := status.Compute(depObj)
 				if err != nil {
 					return fmt.Errorf("dependency %s/%s not ready: %w", dep.APIVersion, ssautil.FmtObjMetadata(depMd), err)
@@ -432,15 +451,10 @@ func (r *ResourceSetReconciler) apply(ctx context.Context,
 	}
 
 	// Configure the Kubernetes client for impersonation.
-	var impersonatorOpts []runtimeClient.ImpersonatorOption
-	if r.DefaultServiceAccount != "" || obj.Spec.ServiceAccountName != "" {
-		impersonatorOpts = append(impersonatorOpts,
-			runtimeClient.WithServiceAccount(r.DefaultServiceAccount, obj.Spec.ServiceAccountName, obj.GetNamespace()))
-	}
-	if r.ClusterReader != nil {
-		impersonatorOpts = append(impersonatorOpts, runtimeClient.WithPolling(r.ClusterReader))
+	impersonation, err := r.makeImpersonator(ctx, obj)
+	if err != nil {
+		return "", err
 	}
-	impersonation := runtimeClient.NewImpersonator(r.Client, impersonatorOpts...)
 
 	// Create the Kubernetes client that runs under impersonation.
 	kubeClient, statusPoller, err := impersonation.GetClient(ctx)
@@ -795,6 +809,45 @@ func (r *ResourceSetReconciler) patch(ctx context.Context,
 	return nil
 }
 
+// makeImpersonator creates an impersonator for the ResourceSet.
+// It configures service account impersonation and custom health check readers.
+func (r *ResourceSetReconciler) makeImpersonator(ctx context.Context, obj *fluxcdv1.ResourceSet) (*runtimeClient.Impersonator, error) {
+	var impersonatorOpts []runtimeClient.ImpersonatorOption
+
+	// Configure service account for impersonation.
+	if r.DefaultServiceAccount != "" || obj.Spec.ServiceAccountName != "" {
+		impersonatorOpts = append(impersonatorOpts,
+			runtimeClient.WithServiceAccount(r.DefaultServiceAccount, obj.Spec.ServiceAccountName, obj.GetNamespace()))
+	}
+
+	// Configure the kstatus poller with custom health checks for
+	// Flux Operator owned resources.
+	if r.ClusterReader != nil {
+		kinds := []string{fluxcdv1.FluxInstanceKind, fluxcdv1.ResourceSetKind, fluxcdv1.ResourceSetInputProviderKind}
+		healthChecks := make([]kustomize.CustomHealthCheck, 0, len(kinds))
+		for _, kind := range kinds {
+			healthChecks = append(healthChecks, kustomize.CustomHealthCheck{
+				APIVersion: fluxcdv1.GroupVersion.String(),
+				Kind:       kind,
+				HealthCheckExpressions: kustomize.HealthCheckExpressions{
+					Current: fluxcdv1.HealthCheckExpr,
+				},
+			})
+		}
+
+		statusReaders, err := cel.PollerWithCustomHealthChecks(ctx, healthChecks)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create custom health check readers: %w", err)
+		}
+
+		impersonatorOpts = append(impersonatorOpts,
+			runtimeClient.WithPolling(r.ClusterReader, statusReaders...),
+		)
+	}
+
+	return runtimeClient.NewImpersonator(r.Client, impersonatorOpts...), nil
+}
+
 func (r *ResourceSetReconciler) recordMetrics(obj *fluxcdv1.ResourceSet) error {
 	if !obj.ObjectMeta.DeletionTimestamp.IsZero() {
 		reporter.DeleteMetricsFor(fluxcdv1.ResourceSetKind, obj.GetName(), obj.GetNamespace())
diff --git a/internal/install/client.go b/internal/install/client.go
index ff3320d8..5f7943a5 100644
--- a/internal/install/client.go
+++ b/internal/install/client.go
@@ -89,7 +89,7 @@ func NewStatusPoller(ctx context.Context, reader client.Reader, mapper meta.REST
 			APIVersion: fluxcdv1.GroupVersion.String(),
 			Kind:       kind,
 			HealthCheckExpressions: kustomize.HealthCheckExpressions{
-				Current: "status.conditions.filter(e, e.type == 'Ready').all(e, e.status == 'True' && e.observedGeneration == metadata.generation)",
+				Current: fluxcdv1.HealthCheckExpr,
 			},
 		})
 	}