diff --git a/example/src/ContractorOnboarding.tsx b/example/src/ContractorOnboarding.tsx
index e340fc1c8..8eecbaf3d 100644
--- a/example/src/ContractorOnboarding.tsx
+++ b/example/src/ContractorOnboarding.tsx
@@ -31,6 +31,7 @@ import {
 import Flag from 'react-flagpack';
 import React, { useState } from 'react';
 import { RemoteFlows } from './RemoteFlows';
+import { getUrlParam } from './utils/urlState';
 import { AlertError } from './AlertError';
 import { ReviewContractorOnboardingStep } from './ReviewContractorOnboardingStep';
 import { PricingPlanCard } from './components/PricingPlanCard';
@@ -821,7 +822,9 @@ export const ContractorOnboardingWithProps = ({
 export const ContractorOnboardingForm = () => {
   const [formData, setFormData] = useState<ContractorOnboardingFormData>({
     employmentId:
-      import.meta.env.VITE_CONTRACTOR_MANAGEMENT_EMPLOYMENT_ID || '', // use your own employment ID
+      getUrlParam('employmentId') ||
+      import.meta.env.VITE_CONTRACTOR_MANAGEMENT_EMPLOYMENT_ID ||
+      '', // use your own employment ID
     externalId: '',
     partnerExternalId: '',
   });
diff --git a/scripts/seed-onboarding.ts b/scripts/seed-onboarding.ts
index ac7aed7b1..ab59549a0 100644
--- a/scripts/seed-onboarding.ts
+++ b/scripts/seed-onboarding.ts
@@ -31,6 +31,17 @@
  *   npm run seed:onboarding -- --country=DEU
  *   npm run seed:onboarding -- --country=ESP --basic-info-version=4
  *
+ * Pass --type=contractor to instead create a contractor employment from the
+ * contractor_basic_information schema and stop there, mirroring the
+ * basic_information step of src/flows/ContractorOnboarding/hooks.tsx.
+ * ir35 (GBR) and nationality_status (SAU/KWT/OMN/QAT/BHR) aren't in that
+ * schema - ContractorOnboarding's jsfModify adds them client-side and the
+ * hook writes them to the contractor contract document after creating the
+ * employment - so this does the same with fixed answers that avoid the IR35
+ * SDS upload and the non-national warning.
+ *
+ *   npm run seed:onboarding -- --country=GBR --type=contractor --env=sandbox
+ *
  * By default this proxies through a locally running `example` dev server
  * (BASE_URL, `example/.env`'s VITE_REMOTE_GATEWAY decides which gateway that
  * is - easy to lose track of).
@@ -89,7 +100,13 @@ const stringArg = (key: string): string | undefined => {
   return typeof value === 'string' ? value : undefined;
 };
 const COUNTRY = (stringArg('country') || 'DEU').toUpperCase();
-const BASIC_INFO_VERSION = Number(stringArg('basic-info-version') || 4);
+const TYPE = stringArg('type') || 'employee';
+if (TYPE !== 'employee' && TYPE !== 'contractor') {
+  throw new Error(`--type must be employee or contractor (got ${TYPE}).`);
+}
+const BASIC_INFO_VERSION = Number(
+  stringArg('basic-info-version') || (TYPE === 'contractor' ? 1 : 4),
+);
 if ('env' in args && stringArg('env') === undefined) {
   throw new Error(
     '--env requires a value, e.g. --env=sandbox (got a bare --env flag).',
@@ -206,7 +223,86 @@ async function findSafeStartDate(): Promise<string> {
   return pickSafeDate(holidayDates);
 }
 
-async function main() {
+const CONTRACTOR_NATIONALITY_COUNTRIES = ['SAU', 'KWT', 'OMN', 'QAT', 'BHR'];
+
+function contractorContractDocumentSeed(): Record<string, string> | undefined {
+  if (COUNTRY === 'GBR') return { ir_35: 'exempt' };
+  if (CONTRACTOR_NATIONALITY_COUNTRIES.includes(COUNTRY)) {
+    return { nationality: 'national' };
+  }
+  return undefined;
+}
+
+async function seedContractor() {
+  console.log(`Fetching contractor_basic_information schema for ${COUNTRY}...`);
+  const basicInfoSchema = await fetchSchema(
+    'contractor_basic_information',
+    BASIC_INFO_VERSION,
+  );
+  const startDate = await findSafeStartDate();
+  const { values: basicInformation, skipped } = fillSchema(basicInfoSchema, {
+    provisional_start_date: startDate,
+  });
+  console.log(
+    'basic_information payload:',
+    JSON.stringify(basicInformation, null, 2),
+  );
+  if (skipped.length) {
+    console.log('Skipped (unfillable) fields:', skipped.join(', '));
+  }
+
+  console.log('\nCreating contractor employment...');
+  const created = await api<{ data?: { employment?: { id?: string } } }>(
+    'POST',
+    '/v1/employments',
+    {
+      query: { json_schema_version: BASIC_INFO_VERSION },
+      body: {
+        basic_information: basicInformation,
+        type: 'contractor',
+        country_code: COUNTRY,
+      },
+    },
+  );
+  const employmentId = created?.data?.employment?.id;
+  if (!employmentId) {
+    throw new Error(
+      `Could not find employment id in response: ${JSON.stringify(created)}`,
+    );
+  }
+  console.log(`Employment created: ${employmentId}`);
+
+  const contractDocument = contractorContractDocumentSeed();
+  if (contractDocument) {
+    console.log(
+      `\nSetting ${Object.keys(contractDocument).join(', ')} on the contract document...`,
+    );
+    await api(
+      'POST',
+      `/v1/contractors/employments/${employmentId}/contract-documents`,
+      { body: { contract_document: contractDocument } },
+    );
+  }
+
+  console.log(
+    `\nDone. Contractor employment ${employmentId} for ${COUNTRY} has basic_information filled in.`,
+  );
+  const appUrl = process.env.VITE_APP_URL || (ENV ? undefined : BASE_URL);
+  if (appUrl) {
+    console.log(
+      `\nOpen this link (Employment ID is prefilled via ?employmentId=):\n\n` +
+        `  ${appUrl}/?demo=contract-onboarding&employmentId=${employmentId}\n`,
+    );
+  } else {
+    console.log(
+      `\nOpen your app's contractor onboarding demo and enter this Employment ID ` +
+        `(?employmentId=${employmentId} also works as a query param).\n` +
+        `Tip: set VITE_APP_URL=<your deployed app URL> in .env.${ENV} to get a ready-to-click link next time.`,
+    );
+  }
+}
+
+async function seedEmployee() {
   console.log(`Fetching employment_basic_information schema for ${COUNTRY}...`);
   const basicInfoSchema = await fetchSchema(
     'employment_basic_information',
@@ -311,6 +407,10 @@ async function main() {
   }
 }
 
+function main() {
+  return TYPE === 'contractor' ? seedContractor() : seedEmployee();
+}
+
 main().catch((err: unknown) => {
   console.error('\nFailed:', err instanceof Error ? err.message : err);
   if (err instanceof ApiError && err.body) {