diff --git a/app/core/permission_registry.py b/app/core/permission_registry.py
index ec522a1..5dbec6c 100644
--- a/app/core/permission_registry.py
+++ b/app/core/permission_registry.py
@@ -59,6 +59,31 @@ CORE_PERMISSIONS: list[dict[str, str]] = [
 ]
 
 
+# ── Core field definitions for field-level permissions ──
+CORE_FIELD_DEFINITIONS: list[dict[str, str]] = [
+    {"module": "companies", "field": "name", "label": "Name", "sensitivity": "normal"},
+    {"module": "companies", "field": "account_number", "label": "Account Number", "sensitivity": "normal"},
+    {"module": "companies", "field": "industry", "label": "Industry", "sensitivity": "normal"},
+    {"module": "companies", "field": "phone", "label": "Phone", "sensitivity": "normal"},
+    {"module": "companies", "field": "email", "label": "Email", "sensitivity": "normal"},
+    {"module": "companies", "field": "website", "label": "Website", "sensitivity": "normal"},
+    {"module": "companies", "field": "description", "label": "Description", "sensitivity": "normal"},
+    {"module": "contacts", "field": "first_name", "label": "First Name", "sensitivity": "normal"},
+    {"module": "contacts", "field": "last_name", "label": "Last Name", "sensitivity": "normal"},
+    {"module": "contacts", "field": "email", "label": "Email", "sensitivity": "normal"},
+    {"module": "contacts", "field": "phone", "label": "Phone", "sensitivity": "normal"},
+    {"module": "contacts", "field": "mobile", "label": "Mobile", "sensitivity": "sensitive"},
+    {"module": "contacts", "field": "position", "label": "Position", "sensitivity": "normal"},
+    {"module": "contacts", "field": "department", "label": "Department", "sensitivity": "normal"},
+    {"module": "contacts", "field": "linkedin_url", "label": "LinkedIn URL", "sensitivity": "sensitive"},
+    {"module": "contacts", "field": "notes", "label": "Notes", "sensitivity": "sensitive"},
+    {"module": "users", "field": "email", "label": "Email", "sensitivity": "normal"},
+    {"module": "users", "field": "name", "label": "Name", "sensitivity": "normal"},
+    {"module": "users", "field": "role", "label": "Role", "sensitivity": "normal"},
+    {"module": "users", "field": "is_active", "label": "Active", "sensitivity": "normal"},
+]
+
+
 class PermissionRegistry:
     """Central registry of all valid permissions (core + active plugins)."""
 
@@ -67,6 +92,8 @@ class PermissionRegistry:
         self._plugin_permissions: dict[str, list[dict[str, str]]] = {}  # plugin_name → perms
         self._active_plugins: set[str] = set()
         self._initialized = False
+        self._field_definitions: dict[str, list[dict[str, str]]] = {}  # plugin_name → field_defs
+        self._core_field_definitions: list[dict[str, str]] = list(CORE_FIELD_DEFINITIONS)
 
     def initialize(self, active_plugin_names: set[str] | None = None) -> None:
         """Build the registry from core permissions and active plugin manifests."""
@@ -137,6 +164,18 @@ class PermissionRegistry:
             groups[cat].append(perm)
         return groups
 
+    def register_field_definitions(self, plugin_name: str, field_defs: list[dict[str, str]]) -> None:
+        """Register field definitions from a plugin."""
+        self._field_definitions[plugin_name] = field_defs
+        logger.info("Registered %d field definitions for plugin '%s'", len(field_defs), plugin_name)
+
+    def get_all_field_definitions(self) -> list[dict[str, str]]:
+        """Return all registered field definitions."""
+        result = list(self._core_field_definitions)
+        for defs in self._field_definitions.values():
+            result.extend(defs)
+        return result
+
 
 # Global instance
 _registry = PermissionRegistry()
diff --git a/app/main.py b/app/main.py
index f3d73d1..06907ff 100644
--- a/app/main.py
+++ b/app/main.py
@@ -177,6 +177,16 @@ async def lifespan(app: FastAPI):
     init_permission_registry(active_plugin_names)
     logger.info("Permission registry initialized with %d active plugins", len(active_plugin_names))
 
+    # Register field definitions from active plugins
+    from app.core.permission_registry import get_permission_registry
+    for name in registry._plugins:
+        plugin = registry.get_plugin(name)
+        if plugin:
+            field_defs = plugin.get_field_definitions()
+            if field_defs:
+                get_permission_registry().register_field_definitions(name, field_defs)
+    logger.info("Field definitions registered for %d plugins", len(registry._plugins))
+
     # Seed default data (EUR currency, 19%/7% tax rates) for all tenants
     from app.core.seeds import seed_default_data
 
diff --git a/app/plugins/base.py b/app/plugins/base.py
index 3883357..d34660c 100644
--- a/app/plugins/base.py
+++ b/app/plugins/base.py
@@ -82,6 +82,15 @@ class BasePlugin(ABC):
         """
         return []
 
+    # ─── Field Definitions ───
+
+    def get_field_definitions(self) -> list[dict[str, str]]:
+        """Return field definitions from manifest."""
+        return [
+            {"module": fd.module, "field": fd.field, "label": fd.label, "sensitivity": fd.sensitivity}
+            for fd in self.manifest.field_definitions
+        ]
+
     # ─── Route Registration ───
 
     def get_routes(self) -> list[APIRouter]:
diff --git a/app/plugins/manifest.py b/app/plugins/manifest.py
index 69d0ed0..e651788 100644
--- a/app/plugins/manifest.py
+++ b/app/plugins/manifest.py
@@ -15,6 +15,15 @@ class PluginRouteDef(BaseModel):
     )
 
 
+class FieldDefinition(BaseModel):
+    """Field definition for field-level permissions."""
+
+    module: str = Field(..., description="Module name (e.g. 'companies', 'contacts')")
+    field: str = Field(..., description="Field name (e.g. 'annual_revenue')")
+    label: str = Field(..., description="Human-readable label")
+    sensitivity: str = Field(default="normal", description="normal|sensitive|critical")
+
+
 class PluginManifest(BaseModel):
     """Manifest describing a plugin's metadata, dependencies, and capabilities."""
 
@@ -42,6 +51,9 @@ class PluginManifest(BaseModel):
     is_core: bool = Field(
         default=False, description="Whether this is a core plugin that cannot be deactivated"
     )
+    field_definitions: list[FieldDefinition] = Field(
+        default_factory=list, description="Field definitions for field-level permissions"
+    )
 
     @field_validator("name")
     @classmethod
diff --git a/app/routes/companies.py b/app/routes/companies.py
index 7fcf0e0..e1deef9 100644
--- a/app/routes/companies.py
+++ b/app/routes/companies.py
@@ -37,6 +37,7 @@ async def list_companies(
         industry=industry,
         sort_by=sort_by,
         sort_order=sort_order,
+        resolved_perms=current_user,
     )
     return result
 
@@ -159,7 +160,7 @@ async def get_company(
             400, detail={"detail": "Invalid company_id", "code": "invalid_id"}
         ) from None
 
-    data = await company_service.get_company_detail(db, tenant_id, cid)
+    data = await company_service.get_company_detail(db, tenant_id, cid, resolved_perms=current_user)
     if data is None:
         raise HTTPException(404, detail={"detail": "Company not found", "code": "not_found"})
     return data
diff --git a/app/routes/contacts.py b/app/routes/contacts.py
index 3cdac69..c897dad 100644
--- a/app/routes/contacts.py
+++ b/app/routes/contacts.py
@@ -43,6 +43,7 @@ async def list_contacts(
         search=search,
         sort_by=sort_by,
         sort_order=sort_order,
+        resolved_perms=current_user,
     )
     return result
 
@@ -173,7 +174,7 @@ async def get_contact(
             400, detail={"detail": "Invalid contact_id", "code": "invalid_id"}
         ) from None
 
-    data = await contact_service.get_contact_detail(db, tenant_id, cid)
+    data = await contact_service.get_contact_detail(db, tenant_id, cid, resolved_perms=current_user)
     if data is None:
         raise HTTPException(404, detail={"detail": "Contact not found", "code": "not_found"})
     return data
diff --git a/app/routes/roles.py b/app/routes/roles.py
index 6349681..b3ec573 100644
--- a/app/routes/roles.py
+++ b/app/routes/roles.py
@@ -12,6 +12,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from app.core.audit import log_audit
 from app.core.auth import get_redis
 from app.core.db import get_db
+from app.core.permission_registry import get_permission_registry
 from app.core.permissions import invalidate_all_user_permissions
 from app.deps import require_permission
 from app.models.plugin import Plugin as PluginModel
@@ -108,6 +109,7 @@ async def list_permissions(
         "system": SYSTEM_PERMISSIONS,
         "plugins": plugin_perms,
         "all": SYSTEM_PERMISSIONS + plugin_perms,
+        "field_definitions": get_permission_registry().get_all_field_definitions(),
     }
 
 
diff --git a/app/services/company_service.py b/app/services/company_service.py
index 8d94453..3b315a2 100644
--- a/app/services/company_service.py
+++ b/app/services/company_service.py
@@ -35,6 +35,12 @@ def _company_to_dict(c: Company, include_contacts: bool = False) -> dict[str, An
     return data
 
 
+def _filter_company_fields(data: dict, resolved_perms: dict) -> dict:
+    """Filter company fields based on field-level permissions."""
+    from app.core.permissions import filter_fields_by_permission
+    return filter_fields_by_permission(data, resolved_perms, "companies")
+
+
 async def list_companies(
     db: AsyncSession,
     tenant_id: uuid.UUID,
@@ -44,6 +50,7 @@ async def list_companies(
     industry: str | None = None,
     sort_by: str = "name",
     sort_order: str = "asc",
+    resolved_perms: dict | None = None,
 ) -> dict[str, Any]:
     """List companies with pagination, FTS search, industry filter, and sorting."""
     page = max(1, page)
@@ -83,8 +90,12 @@ async def list_companies(
     result = await db.execute(paginated)
     companies = result.scalars().all()
 
+    items = [_company_to_dict(c) for c in companies]
+    if resolved_perms is not None:
+        items = [_filter_company_fields(item, resolved_perms) for item in items]
+
     return {
-        "items": [_company_to_dict(c) for c in companies],
+        "items": items,
         "total": total,
         "page": page,
         "page_size": page_size,
@@ -95,6 +106,7 @@ async def get_company_detail(
     db: AsyncSession,
     tenant_id: uuid.UUID,
     company_id: uuid.UUID,
+    resolved_perms: dict | None = None,
 ) -> dict[str, Any] | None:
     """Get a single company with its contacts array."""
     q = select(Company).where(
@@ -133,6 +145,8 @@ async def get_company_detail(
             }
         )
     data["contacts"] = contacts_list
+    if resolved_perms is not None:
+        data = _filter_company_fields(data, resolved_perms)
     return data
 
 
diff --git a/app/services/contact_service.py b/app/services/contact_service.py
index 25c0559..298f358 100644
--- a/app/services/contact_service.py
+++ b/app/services/contact_service.py
@@ -35,6 +35,12 @@ def _contact_to_dict(c: Contact, include_companies: bool = False) -> dict[str, A
     return data
 
 
+def _filter_contact_fields(data: dict, resolved_perms: dict) -> dict:
+    """Filter contact fields based on field-level permissions."""
+    from app.core.permissions import filter_fields_by_permission
+    return filter_fields_by_permission(data, resolved_perms, "contacts")
+
+
 async def list_contacts(
     db: AsyncSession,
     tenant_id: uuid.UUID,
@@ -43,6 +49,7 @@ async def list_contacts(
     search: str | None = None,
     sort_by: str = "last_name",
     sort_order: str = "asc",
+    resolved_perms: dict | None = None,
 ) -> dict[str, Any]:
     """List contacts with pagination and optional search."""
     page = max(1, page)
@@ -76,8 +83,12 @@ async def list_contacts(
     result = await db.execute(paginated)
     contacts = result.scalars().all()
 
+    items = [_contact_to_dict(c) for c in contacts]
+    if resolved_perms is not None:
+        items = [_filter_contact_fields(item, resolved_perms) for item in items]
+
     return {
-        "items": [_contact_to_dict(c) for c in contacts],
+        "items": items,
         "total": total,
         "page": page,
         "page_size": page_size,
@@ -88,6 +99,7 @@ async def get_contact_detail(
     db: AsyncSession,
     tenant_id: uuid.UUID,
     contact_id: uuid.UUID,
+    resolved_perms: dict | None = None,
 ) -> dict[str, Any] | None:
     """Get a single contact with its linked companies array."""
     q = select(Contact).where(
@@ -123,6 +135,8 @@ async def get_contact_detail(
             }
         )
     data["companies"] = companies_list
+    if resolved_perms is not None:
+        data = _filter_contact_fields(data, resolved_perms)
     return data