diff --git a/src/hooks/index.ts b/src/hooks/index.ts
index fb19021..25cf94f 100644
--- a/src/hooks/index.ts
+++ b/src/hooks/index.ts
@@ -14,3 +14,4 @@ export * from './useAnalytics';
 export * from './useMfa';
 export * from './useWhatsApp';
 export * from './usePortfolio';
+export * from './useGoals';
diff --git a/src/hooks/useGoals.ts b/src/hooks/useGoals.ts
new file mode 100644
index 0000000..6f6e895
--- /dev/null
+++ b/src/hooks/useGoals.ts
@@ -0,0 +1,242 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import {
+  definitionsApi,
+  assignmentsApi,
+  type DefinitionFilters,
+  type CreateDefinitionDto,
+  type UpdateDefinitionDto,
+  type GoalStatus,
+  type AssignmentFilters,
+  type CreateAssignmentDto,
+  type UpdateAssignmentDto,
+  type AssignmentStatus,
+  type UpdateProgressDto,
+} from '@/services/goals';
+
+// ============================================
+// Goal Definitions Hooks
+// ============================================
+
+export function useGoalDefinitions(filters?: DefinitionFilters) {
+  return useQuery({
+    queryKey: ['goals', 'definitions', filters],
+    queryFn: () => definitionsApi.list(filters),
+  });
+}
+
+export function useGoalDefinition(id: string) {
+  return useQuery({
+    queryKey: ['goals', 'definitions', id],
+    queryFn: () => definitionsApi.get(id),
+    enabled: !!id,
+  });
+}
+
+export function useCreateGoalDefinition() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (data: CreateDefinitionDto) => definitionsApi.create(data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions'] });
+    },
+  });
+}
+
+export function useUpdateGoalDefinition() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UpdateDefinitionDto }) =>
+      definitionsApi.update(id, data),
+    onSuccess: (_, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions', id] });
+    },
+  });
+}
+
+export function useUpdateGoalStatus() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, status }: { id: string; status: GoalStatus }) =>
+      definitionsApi.updateStatus(id, { status }),
+    onSuccess: (_, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions', id] });
+    },
+  });
+}
+
+export function useActivateGoal() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => definitionsApi.activate(id),
+    onSuccess: (_, id) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions', id] });
+    },
+  });
+}
+
+export function useDuplicateGoalDefinition() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => definitionsApi.duplicate(id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions'] });
+    },
+  });
+}
+
+export function useDeleteGoalDefinition() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => definitionsApi.delete(id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions'] });
+    },
+  });
+}
+
+// ============================================
+// Goal Assignments Hooks
+// ============================================
+
+export function useGoalAssignments(filters?: AssignmentFilters) {
+  return useQuery({
+    queryKey: ['goals', 'assignments', filters],
+    queryFn: () => assignmentsApi.list(filters),
+  });
+}
+
+export function useGoalAssignmentsByGoal(goalId: string) {
+  return useQuery({
+    queryKey: ['goals', 'definitions', goalId, 'assignments'],
+    queryFn: () => assignmentsApi.listByGoal(goalId),
+    enabled: !!goalId,
+  });
+}
+
+export function useGoalAssignment(id: string) {
+  return useQuery({
+    queryKey: ['goals', 'assignments', id],
+    queryFn: () => assignmentsApi.get(id),
+    enabled: !!id,
+  });
+}
+
+export function useCreateGoalAssignment() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (data: CreateAssignmentDto) => assignmentsApi.create(data),
+    onSuccess: (result) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'definitions', result.definitionId, 'assignments'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'my'] });
+    },
+  });
+}
+
+export function useUpdateGoalAssignment() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UpdateAssignmentDto }) =>
+      assignmentsApi.update(id, data),
+    onSuccess: (_, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments', id] });
+    },
+  });
+}
+
+export function useUpdateAssignmentStatus() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, status }: { id: string; status: AssignmentStatus }) =>
+      assignmentsApi.updateStatus(id, { status }),
+    onSuccess: (_, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments', id] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'my'] });
+    },
+  });
+}
+
+export function useUpdateGoalProgress() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UpdateProgressDto }) =>
+      assignmentsApi.updateProgress(id, data),
+    onSuccess: (_, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments', id] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'my'] });
+    },
+  });
+}
+
+export function useGoalProgressHistory(assignmentId: string) {
+  return useQuery({
+    queryKey: ['goals', 'assignments', assignmentId, 'history'],
+    queryFn: () => assignmentsApi.getHistory(assignmentId),
+    enabled: !!assignmentId,
+  });
+}
+
+export function useDeleteGoalAssignment() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => assignmentsApi.delete(id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'my'] });
+    },
+  });
+}
+
+// ============================================
+// My Goals Hooks
+// ============================================
+
+export function useMyGoals() {
+  return useQuery({
+    queryKey: ['goals', 'my'],
+    queryFn: () => assignmentsApi.getMyGoals(),
+  });
+}
+
+export function useMyGoalsSummary() {
+  return useQuery({
+    queryKey: ['goals', 'my', 'summary'],
+    queryFn: () => assignmentsApi.getMyGoalsSummary(),
+  });
+}
+
+export function useUpdateMyGoalProgress() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UpdateProgressDto }) =>
+      assignmentsApi.updateMyProgress(id, data),
+    onSuccess: (_, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['goals', 'my'] });
+      queryClient.invalidateQueries({ queryKey: ['goals', 'assignments', id] });
+    },
+  });
+}
+
+// ============================================
+// Reports Hooks
+// ============================================
+
+export function useGoalCompletionReport(startDate?: string, endDate?: string) {
+  return useQuery({
+    queryKey: ['goals', 'reports', 'completion', startDate, endDate],
+    queryFn: () => assignmentsApi.getCompletionReport(startDate, endDate),
+  });
+}
+
+export function useGoalUserReport() {
+  return useQuery({
+    queryKey: ['goals', 'reports', 'by-user'],
+    queryFn: () => assignmentsApi.getUserReport(),
+  });
+}
diff --git a/src/services/goals/assignments.api.ts b/src/services/goals/assignments.api.ts
new file mode 100644
index 0000000..b7cdcf3
--- /dev/null
+++ b/src/services/goals/assignments.api.ts
@@ -0,0 +1,205 @@
+import api from '../api';
+
+// ─────────────────────────────────────────────
+// Types
+// ─────────────────────────────────────────────
+
+export type AssigneeType = 'user' | 'team' | 'tenant';
+export type AssignmentStatus = 'active' | 'achieved' | 'failed' | 'cancelled';
+export type ProgressSource = 'manual' | 'automatic' | 'import' | 'api';
+
+export interface Assignment {
+  id: string;
+  tenantId: string;
+  definitionId: string;
+  assigneeType: AssigneeType;
+  userId: string | null;
+  teamId: string | null;
+  customTarget: number | null;
+  currentValue: number;
+  progressPercentage: number;
+  lastUpdatedAt: string | null;
+  status: AssignmentStatus;
+  achievedAt: string | null;
+  notes: string | null;
+  createdAt: string;
+  updatedAt: string;
+  definition?: {
+    id: string;
+    name: string;
+    targetValue: number;
+    unit: string | null;
+    startsAt: string;
+    endsAt: string;
+  };
+  user?: {
+    id: string;
+    email: string;
+    firstName: string | null;
+    lastName: string | null;
+  };
+}
+
+export interface CreateAssignmentDto {
+  definitionId: string;
+  assigneeType?: AssigneeType;
+  userId?: string;
+  teamId?: string;
+  customTarget?: number;
+  notes?: string;
+}
+
+export type UpdateAssignmentDto = Partial<Omit<CreateAssignmentDto, 'definitionId'>>;
+
+export interface AssignmentStatusDto {
+  status: AssignmentStatus;
+}
+
+export interface UpdateProgressDto {
+  value: number;
+  source?: ProgressSource;
+  sourceReference?: string;
+  notes?: string;
+}
+
+export interface AssignmentFilters {
+  definitionId?: string;
+  userId?: string;
+  status?: AssignmentStatus;
+  assigneeType?: AssigneeType;
+  minProgress?: number;
+  maxProgress?: number;
+  sortBy?: string;
+  sortOrder?: 'ASC' | 'DESC';
+  page?: number;
+  limit?: number;
+}
+
+export interface PaginatedAssignments {
+  items: Assignment[];
+  total: number;
+  page: number;
+  limit: number;
+  totalPages: number;
+}
+
+export interface ProgressLog {
+  id: string;
+  assignmentId: string;
+  previousValue: number | null;
+  newValue: number;
+  changeAmount: number | null;
+  source: ProgressSource;
+  sourceReference: string | null;
+  notes: string | null;
+  loggedAt: string;
+  loggedBy: string | null;
+}
+
+export interface MyGoalsSummary {
+  totalAssignments: number;
+  activeAssignments: number;
+  achievedAssignments: number;
+  failedAssignments: number;
+  averageProgress: number;
+  atRiskCount: number;
+}
+
+export interface CompletionReport {
+  totalGoals: number;
+  achievedGoals: number;
+  failedGoals: number;
+  activeGoals: number;
+  completionRate: number;
+  averageProgress: number;
+}
+
+export interface UserReport {
+  userId: string;
+  userName: string | null;
+  totalAssignments: number;
+  achieved: number;
+  failed: number;
+  active: number;
+  averageProgress: number;
+}
+
+// ─────────────────────────────────────────────
+// API Service
+// ─────────────────────────────────────────────
+
+export const assignmentsApi = {
+  // Assignments CRUD
+  list: async (params?: AssignmentFilters): Promise<PaginatedAssignments> => {
+    const response = await api.get<PaginatedAssignments>('/goals/assignments', { params });
+    return response.data;
+  },
+
+  listByGoal: async (goalId: string): Promise<Assignment[]> => {
+    const response = await api.get<Assignment[]>(`/goals/${goalId}/assignments`);
+    return response.data;
+  },
+
+  get: async (id: string): Promise<Assignment> => {
+    const response = await api.get<Assignment>(`/goals/assignments/${id}`);
+    return response.data;
+  },
+
+  create: async (data: CreateAssignmentDto): Promise<Assignment> => {
+    const response = await api.post<Assignment>('/goals/assignments', data);
+    return response.data;
+  },
+
+  update: async (id: string, data: UpdateAssignmentDto): Promise<Assignment> => {
+    const response = await api.patch<Assignment>(`/goals/assignments/${id}`, data);
+    return response.data;
+  },
+
+  updateStatus: async (id: string, data: AssignmentStatusDto): Promise<Assignment> => {
+    const response = await api.patch<Assignment>(`/goals/assignments/${id}/status`, data);
+    return response.data;
+  },
+
+  updateProgress: async (id: string, data: UpdateProgressDto): Promise<Assignment> => {
+    const response = await api.post<Assignment>(`/goals/assignments/${id}/progress`, data);
+    return response.data;
+  },
+
+  getHistory: async (id: string): Promise<ProgressLog[]> => {
+    const response = await api.get<ProgressLog[]>(`/goals/assignments/${id}/history`);
+    return response.data;
+  },
+
+  delete: async (id: string): Promise<void> => {
+    await api.delete(`/goals/assignments/${id}`);
+  },
+
+  // My Goals
+  getMyGoals: async (): Promise<Assignment[]> => {
+    const response = await api.get<Assignment[]>('/goals/my');
+    return response.data;
+  },
+
+  getMyGoalsSummary: async (): Promise<MyGoalsSummary> => {
+    const response = await api.get<MyGoalsSummary>('/goals/my/summary');
+    return response.data;
+  },
+
+  updateMyProgress: async (id: string, data: UpdateProgressDto): Promise<Assignment> => {
+    const response = await api.post<Assignment>(`/goals/my/${id}/update`, data);
+    return response.data;
+  },
+
+  // Reports
+  getCompletionReport: async (startDate?: string, endDate?: string): Promise<CompletionReport> => {
+    const response = await api.get<CompletionReport>('/goals/reports/completion', {
+      params: { startDate, endDate },
+    });
+    return response.data;
+  },
+
+  getUserReport: async (): Promise<UserReport[]> => {
+    const response = await api.get<UserReport[]>('/goals/reports/by-user');
+    return response.data;
+  },
+};
diff --git a/src/services/goals/definitions.api.ts b/src/services/goals/definitions.api.ts
new file mode 100644
index 0000000..18fa457
--- /dev/null
+++ b/src/services/goals/definitions.api.ts
@@ -0,0 +1,137 @@
+import api from '../api';
+
+// ─────────────────────────────────────────────
+// Types
+// ─────────────────────────────────────────────
+
+export type GoalType = 'target' | 'limit' | 'maintain';
+export type MetricType = 'number' | 'currency' | 'percentage' | 'boolean' | 'count';
+export type PeriodType = 'daily' | 'weekly' | 'monthly' | 'quarterly' | 'yearly' | 'custom';
+export type DataSource = 'manual' | 'sales' | 'billing' | 'commissions' | 'custom';
+export type GoalStatus = 'draft' | 'active' | 'paused' | 'completed' | 'cancelled';
+
+export interface SourceConfig {
+  module?: string;
+  entity?: string;
+  filter?: Record<string, unknown>;
+  aggregation?: 'sum' | 'count' | 'avg';
+  field?: string;
+}
+
+export interface Milestone {
+  percentage: number;
+  notify: boolean;
+}
+
+export interface GoalDefinition {
+  id: string;
+  tenantId: string;
+  name: string;
+  description: string | null;
+  category: string | null;
+  type: GoalType;
+  metric: MetricType;
+  targetValue: number;
+  unit: string | null;
+  period: PeriodType;
+  startsAt: string;
+  endsAt: string;
+  source: DataSource;
+  sourceConfig: SourceConfig;
+  milestones: Milestone[];
+  status: GoalStatus;
+  tags: string[];
+  createdAt: string;
+  updatedAt: string;
+  createdBy: string | null;
+  assignmentCount?: number;
+}
+
+export interface CreateDefinitionDto {
+  name: string;
+  description?: string;
+  category?: string;
+  type?: GoalType;
+  metric?: MetricType;
+  targetValue: number;
+  unit?: string;
+  period?: PeriodType;
+  startsAt: string;
+  endsAt: string;
+  source?: DataSource;
+  sourceConfig?: SourceConfig;
+  milestones?: Milestone[];
+  status?: GoalStatus;
+  tags?: string[];
+}
+
+export type UpdateDefinitionDto = Partial<CreateDefinitionDto>;
+
+export interface DefinitionStatusDto {
+  status: GoalStatus;
+}
+
+export interface DefinitionFilters {
+  status?: GoalStatus;
+  period?: PeriodType;
+  category?: string;
+  search?: string;
+  activeOn?: string;
+  sortBy?: string;
+  sortOrder?: 'ASC' | 'DESC';
+  page?: number;
+  limit?: number;
+}
+
+export interface PaginatedDefinitions {
+  items: GoalDefinition[];
+  total: number;
+  page: number;
+  limit: number;
+  totalPages: number;
+}
+
+// ─────────────────────────────────────────────
+// API Service
+// ─────────────────────────────────────────────
+
+export const definitionsApi = {
+  list: async (params?: DefinitionFilters): Promise<PaginatedDefinitions> => {
+    const response = await api.get<PaginatedDefinitions>('/goals', { params });
+    return response.data;
+  },
+
+  get: async (id: string): Promise<GoalDefinition> => {
+    const response = await api.get<GoalDefinition>(`/goals/${id}`);
+    return response.data;
+  },
+
+  create: async (data: CreateDefinitionDto): Promise<GoalDefinition> => {
+    const response = await api.post<GoalDefinition>('/goals', data);
+    return response.data;
+  },
+
+  update: async (id: string, data: UpdateDefinitionDto): Promise<GoalDefinition> => {
+    const response = await api.patch<GoalDefinition>(`/goals/${id}`, data);
+    return response.data;
+  },
+
+  updateStatus: async (id: string, data: DefinitionStatusDto): Promise<GoalDefinition> => {
+    const response = await api.patch<GoalDefinition>(`/goals/${id}/status`, data);
+    return response.data;
+  },
+
+  activate: async (id: string): Promise<GoalDefinition> => {
+    const response = await api.post<GoalDefinition>(`/goals/${id}/activate`);
+    return response.data;
+  },
+
+  duplicate: async (id: string): Promise<GoalDefinition> => {
+    const response = await api.post<GoalDefinition>(`/goals/${id}/duplicate`);
+    return response.data;
+  },
+
+  delete: async (id: string): Promise<void> => {
+    await api.delete(`/goals/${id}`);
+  },
+};
diff --git a/src/services/goals/index.ts b/src/services/goals/index.ts
new file mode 100644
index 0000000..3ba8efb
--- /dev/null
+++ b/src/services/goals/index.ts
@@ -0,0 +1,2 @@
+export * from './definitions.api';
+export * from './assignments.api';