diff --git a/site/src/components/intake/Wizard.astro b/site/src/components/intake/Wizard.astro
index 5245a6e..6730e5f 100644
--- a/site/src/components/intake/Wizard.astro
+++ b/site/src/components/intake/Wizard.astro
@@ -602,6 +602,25 @@ const STEP_LABELS: Record<string, string> = {
         const order = await createResp.json();
         const newOrderNumber = order.order_number;
         if (!newOrderNumber) throw new Error("Order created but no order number returned.");
+        // Validate the intake before checkout. Stripe Checkout is gated on
+        // intake_data_validated=true (set by this endpoint); without it the
+        // checkout call returns 422 INTAKE_NOT_VALIDATED.
+        const valResp = await fetch(`${API}/api/v1/compliance-orders/${newOrderNumber}/validate`, {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: "{}",
+        });
+        if (valResp.status === 422 || valResp.ok) {
+          const val = await valResp.json().catch(() => ({}));
+          if (val && val.ok === false) {
+            const miss = (val.missing || []).join(", ");
+            throw new Error(
+              "Please complete required fields" + (miss ? `: ${miss}` : "") + ".",
+            );
+          }
+        } else if (!valResp.ok) {
+          throw new Error(`Validation HTTP ${valResp.status}`);
+        }
         // Kick off Stripe Checkout for the new order.
         const checkoutResp = await fetch(`${API}/api/v1/checkout/create-session`, {
           method: "POST",