diff --git a/src/flows/Onboarding/hooks/useJobTitleEligibilityCheck.tsx b/src/flows/Onboarding/hooks/useJobTitleEligibilityCheck.tsx
index e2c96b63f..eac4d3b98 100644
--- a/src/flows/Onboarding/hooks/useJobTitleEligibilityCheck.tsx
+++ b/src/flows/Onboarding/hooks/useJobTitleEligibilityCheck.tsx
@@ -103,11 +103,10 @@ export const useJobTitleEligibilityCheck = ({
       validation?.formErrors,
       jobTitle,
     );
-    const paramsChanged = !equal(paramsRef.current, nextParams);
-    if (paramsChanged) {
+    if (!equal(paramsRef.current, nextParams)) {
       setParams(nextParams);
     }
-    if (nextParams && paramsChanged) {
+    if (nextParams) {
       await queryClient
         .query(getOptions(nextParams))
         .catch(() =>
diff --git a/src/flows/Onboarding/tests/OnboardingFlowJobTitleEligibility.test.tsx b/src/flows/Onboarding/tests/OnboardingFlowJobTitleEligibility.test.tsx
new file mode 100644
index 000000000..95f3d3301
--- /dev/null
+++ b/src/flows/Onboarding/tests/OnboardingFlowJobTitleEligibility.test.tsx
@@ -0,0 +1,207 @@
+import { act, render, screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { http, HttpResponse } from 'msw';
+import { OnboardingFlow } from '@/src/flows/Onboarding/OnboardingFlow';
+import {
+  contractDetailsSchemaV1JobTitleEligibility,
+  employmentDefaultResponse,
+} from '@/src/flows/Onboarding/tests/fixtures';
+import { OnboardingRenderProps } from '@/src/flows/Onboarding/types';
+import { fillRadio, queryClient, TestProviders } from '@/src/tests/testHelpers';
+import { server } from '@/src/tests/server';
+import { $TSFixMe } from '@/src/types/remoteFlows';
+
+describe('OnboardingFlow - job title eligibility check on blur', () => {
+  let latestOnboardingBag: $TSFixMe;
+
+  const mockRender = vi.fn(
+    ({ onboardingBag, components }: OnboardingRenderProps) => {
+      latestOnboardingBag = onboardingBag;
+      const { ContractDetailsStep } = components;
+
+      if (onboardingBag.stepState.currentStep.name !== 'contract_details') {
+        return null;
+      }
+
+      return <ContractDetailsStep />;
+    },
+  );
+
+  const jobTitleEligibilityCheckSpy = vi.fn();
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockRender.mockReset();
+    queryClient.clear();
+
+    server.use(
+      http.get('*/v1/employments/:id', ({ params }) => {
+        return HttpResponse.json({
+          ...employmentDefaultResponse,
+          data: {
+            ...employmentDefaultResponse.data,
+            employment: {
+              ...employmentDefaultResponse.data.employment,
+              id: params?.id,
+              country: {
+                code: 'ITA',
+                name: 'Italy',
+                alpha_2_code: 'IT',
+                supported_json_schemas: ['employment_basic_information'],
+              },
+            },
+          },
+        });
+      }),
+      http.get('*/v1/countries/ITA/employment_basic_information*', () => {
+        return HttpResponse.json({
+          data: { properties: { name: { type: 'string', title: 'Name' } } },
+        });
+      }),
+      http.get('*/v1/countries/ITA/contract_details*', () => {
+        return HttpResponse.json(contractDetailsSchemaV1JobTitleEligibility);
+      }),
+      http.post(
+        '*/v2/employments/:id/job-title-eligibility-check',
+        async ({ request }) => {
+          jobTitleEligibilityCheckSpy(await request.json());
+          return HttpResponse.json({
+            data: {
+              job_title_eligibility_check: {
+                slug: 'job-title-eligibility-check-slug',
+                result: 'yes',
+              },
+            },
+          });
+        },
+      ),
+    );
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  const renderContractDetailsStep = async () => {
+    render(
+      <OnboardingFlow
+        companyId='test-company-id'
+        employmentId='test-employment-id'
+        skipSteps={['select_country']}
+        options={{ features: ['job_title_eligibility'] }}
+        render={mockRender}
+      />,
+      { wrapper: TestProviders },
+    );
+
+    await waitFor(() => expect(latestOnboardingBag.isLoading).toBe(false));
+
+    act(() => {
+      latestOnboardingBag.goTo('contract_details');
+    });
+
+    await screen.findByLabelText(/Role description/i);
+  };
+
+  const fillRoleFields = async () => {
+    const user = userEvent.setup();
+    const roleDescription = screen.getByLabelText(/Role description/i);
+
+    await user.clear(roleDescription);
+    await user.type(roleDescription, 'Backend engineer responsibilities');
+    await fillRadio('Will this role require working onsite', 'no');
+    await fillRadio('Does this role require a professional license', 'no');
+    // Blur the last field touched so the values captured on blur include
+    // all three role fields already committed.
+    await user.tab();
+  };
+
+  it('calls the job title eligibility check once the role fields are filled and blurred', async () => {
+    await renderContractDetailsStep();
+
+    await fillRoleFields();
+
+    await waitFor(() =>
+      expect(jobTitleEligibilityCheckSpy).toHaveBeenCalledTimes(1),
+    );
+    expect(jobTitleEligibilityCheckSpy).toHaveBeenCalledWith({
+      job_title: 'pm',
+      role_description: 'Backend engineer responsibilities',
+      role_is_onsite: 'no',
+      role_requires_license: 'no',
+    });
+  });
+
+  it('does not call the check again when a later blur carries the same values', async () => {
+    await renderContractDetailsStep();
+
+    await fillRoleFields();
+    await waitFor(() =>
+      expect(jobTitleEligibilityCheckSpy).toHaveBeenCalledTimes(1),
+    );
+
+    const user = userEvent.setup();
+    const roleDescription = screen.getByLabelText(/Role description/i);
+    await user.click(roleDescription);
+    await user.tab();
+
+    // user.tab() doesn't wait for checkJobTitleEligibility - the onBlur handler
+    // doesn't await it, so a duplicate request (if the dedup were ever broken)
+    // could still be in flight right now. We wait up to 200ms to give it a
+    // chance to show up before checking that it didn't. waitFor normally throws
+    // if its condition never comes true, but here that's the outcome we want,
+    // so we swallow it with .catch and let the assertion below do the real check.
+    await waitFor(
+      () => {
+        expect(jobTitleEligibilityCheckSpy.mock.calls.length).toBeGreaterThan(
+          1,
+        );
+      },
+      { timeout: 200 },
+    ).catch(() => undefined);
+
+    expect(jobTitleEligibilityCheckSpy).toHaveBeenCalledTimes(1);
+  });
+
+  it('retries the check on a later blur when the previous request failed', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    let failing = true;
+    const successSpy = vi.fn();
+    server.use(
+      http.post('*/v2/employments/:id/job-title-eligibility-check', () => {
+        if (failing) {
+          return HttpResponse.json(
+            { message: 'Internal error' },
+            { status: 500 },
+          );
+        }
+        successSpy();
+        return HttpResponse.json({
+          data: {
+            job_title_eligibility_check: {
+              slug: 'job-title-eligibility-check-slug',
+              result: 'yes',
+            },
+          },
+        });
+      }),
+    );
+
+    await renderContractDetailsStep();
+
+    await fillRoleFields();
+    await waitFor(() =>
+      expect(console.error).toHaveBeenCalledWith(
+        'Failed to fetch job title eligibility check',
+      ),
+    );
+    expect(successSpy).not.toHaveBeenCalled();
+
+    failing = false;
+    const user = userEvent.setup();
+    await user.click(screen.getByLabelText(/Role description/i));
+    await user.tab();
+
+    await waitFor(() => expect(successSpy).toHaveBeenCalledTimes(1));
+  });
+});
diff --git a/src/flows/Onboarding/tests/fixtures/contractDetails/index.ts b/src/flows/Onboarding/tests/fixtures/contractDetails/index.ts
index bfef88c11..14f25a20c 100644
--- a/src/flows/Onboarding/tests/fixtures/contractDetails/index.ts
+++ b/src/flows/Onboarding/tests/fixtures/contractDetails/index.ts
@@ -3,3 +3,4 @@ export * from './v1-southKorea';
 export * from './v1-germany';
 export * from './v1-france';
 export * from './v1-italy-apl';
+export * from './v1-job-title-eligibility';
diff --git a/src/flows/Onboarding/tests/fixtures/contractDetails/v1-job-title-eligibility.ts b/src/flows/Onboarding/tests/fixtures/contractDetails/v1-job-title-eligibility.ts
new file mode 100644
index 000000000..f7e453fe8
--- /dev/null
+++ b/src/flows/Onboarding/tests/fixtures/contractDetails/v1-job-title-eligibility.ts
@@ -0,0 +1,66 @@
+/**
+ * Trimmed down jsf v1 contract details schema exposing only the fields the
+ * job title eligibility check cares about: role_description, role_is_onsite,
+ * role_requires_license, and the additional_job_title_eligibility_check_slug
+ * field whose presence gates the check.
+ */
+export const contractDetailsSchemaV1JobTitleEligibility = {
+  data: {
+    additionalProperties: false,
+    properties: {
+      role_description: {
+        title: 'Role description',
+        type: 'string',
+        'x-jsf-presentation': {
+          inputType: 'textarea',
+        },
+      },
+      role_is_onsite: {
+        oneOf: [
+          {
+            const: 'yes',
+            title: 'Yes',
+          },
+          {
+            const: 'no',
+            title: 'No',
+          },
+        ],
+        title: 'Will this role require working onsite?',
+        type: 'string',
+        'x-jsf-presentation': {
+          direction: 'row',
+          inputType: 'radio',
+        },
+      },
+      role_requires_license: {
+        oneOf: [
+          {
+            const: 'yes',
+            title: 'Yes',
+          },
+          {
+            const: 'no',
+            title: 'No',
+          },
+        ],
+        title: 'Does this role require a professional license?',
+        type: 'string',
+        'x-jsf-presentation': {
+          direction: 'row',
+          inputType: 'radio',
+        },
+      },
+      additional_job_title_eligibility_check_slug: {
+        type: ['string', 'null'],
+        'x-jsf-presentation': {
+          inputType: 'hidden',
+        },
+      },
+    },
+    type: 'object',
+    'x-rmt-meta': {
+      jsfVersion: '1',
+    },
+  },
+};
diff --git a/src/flows/Onboarding/tests/utils.test.ts b/src/flows/Onboarding/tests/utils.test.ts
index a740e7830..cbc358dc2 100644
--- a/src/flows/Onboarding/tests/utils.test.ts
+++ b/src/flows/Onboarding/tests/utils.test.ts
@@ -1,8 +1,11 @@
+import { $TSFixMe } from '@/src/types/remoteFlows';
 import {
   buildSteps,
   getBasicInformationSchemaVersion,
   getBenefitOffersSchemaVersion,
   getContractDetailsSchemaVersion,
+  getJobTitleEligibilityParams,
+  JOB_TITLE_ELIGIBILITY_SLUG_FIELD,
   usesJsfV1ContractDetails,
 } from '../utils';
 
@@ -267,3 +270,88 @@ describe('buildSteps', () => {
     });
   });
 });
+
+describe('getJobTitleEligibilityParams', () => {
+  const buildField = (name: string, isVisible = true): $TSFixMe => ({
+    name,
+    isVisible,
+  });
+
+  const roleFields = [
+    buildField(JOB_TITLE_ELIGIBILITY_SLUG_FIELD),
+    buildField('role_description'),
+    buildField('role_is_onsite'),
+    buildField('role_requires_license'),
+  ];
+
+  const filledValues = {
+    role_description: 'Backend engineer',
+    role_is_onsite: 'no',
+    role_requires_license: 'no',
+  };
+
+  it('returns null when the slug field is not part of the schema', () => {
+    const fields = roleFields.filter(
+      (field) => field.name !== JOB_TITLE_ELIGIBILITY_SLUG_FIELD,
+    );
+
+    const result = getJobTitleEligibilityParams(fields, filledValues);
+
+    expect(result).toBeNull();
+  });
+
+  it('returns null when a role field is missing a value', () => {
+    const result = getJobTitleEligibilityParams(roleFields, {
+      ...filledValues,
+      role_description: '',
+    });
+
+    expect(result).toBeNull();
+  });
+
+  it('returns null when a role field has a validation error', () => {
+    const result = getJobTitleEligibilityParams(roleFields, filledValues, {
+      role_description: 'Too short',
+    });
+
+    expect(result).toBeNull();
+  });
+
+  it('ignores a role field that is hidden by conditional logic', () => {
+    const fields = [
+      buildField(JOB_TITLE_ELIGIBILITY_SLUG_FIELD),
+      buildField('role_description'),
+      buildField('role_is_onsite', false),
+      buildField('role_requires_license'),
+    ];
+
+    const result = getJobTitleEligibilityParams(fields, filledValues);
+
+    expect(result).toEqual({
+      role_description: 'Backend engineer',
+      role_requires_license: 'no',
+    });
+  });
+
+  it('returns the params with job_title when all role fields are filled and valid', () => {
+    const result = getJobTitleEligibilityParams(
+      roleFields,
+      filledValues,
+      null,
+      'Software Engineer',
+    );
+
+    expect(result).toEqual({
+      job_title: 'Software Engineer',
+      role_description: 'Backend engineer',
+      role_is_onsite: 'no',
+      role_requires_license: 'no',
+    });
+  });
+
+  it('omits job_title when none is available', () => {
+    const result = getJobTitleEligibilityParams(roleFields, filledValues);
+
+    expect(result).toEqual(filledValues);
+  });
+});