diff --git a/src/components/POS/CheckoutModal.vue b/src/components/POS/CheckoutModal.vue
index 43c910a..eba78a5 100644
--- a/src/components/POS/CheckoutModal.vue
+++ b/src/components/POS/CheckoutModal.vue
@@ -1,5 +1,5 @@
 <script setup>
-import { ref, computed } from 'vue';
+import { ref, computed, watch } from 'vue';
 import GoogleIcon from '@Shared/GoogleIcon.vue';
 import Modal from '@Holos/Modal.vue';
 
@@ -24,6 +24,7 @@ const emit = defineEmits(['close', 'confirm']);
 
 /** Estado */
 const selectedMethod = ref('cash');
+const cashReceived = ref(0);
 
 /** Computados */
 const formattedSubtotal = computed(() => {
@@ -47,6 +48,30 @@ const formattedTotal = computed(() => {
     }).format(props.cart.total);
 });
 
+// Cálculo de cambio
+const change = computed(() => {
+    if (selectedMethod.value === 'cash' && cashReceived.value > 0) {
+        return cashReceived.value - props.cart.total;
+    }
+    return 0;
+});
+
+// Validar que el efectivo sea suficiente
+const isValidCash = computed(() => {
+    if (selectedMethod.value === 'cash') {
+        return cashReceived.value >= props.cart.total;
+    }
+    return true; // Tarjetas siempre válidas
+});
+
+// Puede confirmar si no es efectivo o si el efectivo es válido
+const canConfirm = computed(() => {
+    if (selectedMethod.value === 'cash') {
+        return cashReceived.value > 0 && isValidCash.value;
+    }
+    return true;
+});
+
 const paymentMethods = [
     {
         value: 'cash',
@@ -71,19 +96,53 @@ const paymentMethods = [
     }
 ];
 
+/** Watchers */
+// Limpiar cashReceived cuando cambia el método de pago
+watch(selectedMethod, (newMethod) => {
+    if (newMethod !== 'cash') {
+        cashReceived.value = 0;
+    }
+});
+
+// Resetear cashReceived cuando se abre el modal
+watch(() => props.show, (isShown) => {
+    if (isShown) {
+        cashReceived.value = 0;
+    }
+});
+
 /** Métodos */
 const handleConfirm = () => {
+    // Validar método de pago seleccionado
     if (!selectedMethod.value) {
         window.Notify.error('Selecciona un método de pago');
         return;
     }
 
-    emit('confirm', selectedMethod.value);
+    // Validaciones específicas para efectivo
+    if (selectedMethod.value === 'cash') {
+        if (!cashReceived.value || cashReceived.value <= 0) {
+            window.Notify.error('Ingresa el efectivo recibido');
+            return;
+        }
+
+        if (cashReceived.value < props.cart.total) {
+            window.Notify.error(`El efectivo recibido es insuficiente. Faltan $${(props.cart.total - cashReceived.value).toFixed(2)}`);
+            return;
+        }
+    }
+
+    // Emitir evento con datos completos
+    emit('confirm', {
+        paymentMethod: selectedMethod.value,
+        cashReceived: selectedMethod.value === 'cash' ? parseFloat(cashReceived.value) : null
+    });
 };
 
 const handleClose = () => {
     if (!props.processing) {
         selectedMethod.value = 'cash';
+        cashReceived.value = 0;
         emit('close');
     }
 };
@@ -210,6 +269,80 @@ const handleClose = () => {
                         </button>
                     </div>
                 </div>
+
+                <!-- Sección de efectivo -->
+                <div v-if="selectedMethod === 'cash'" class="space-y-4">
+                    <!-- Input de efectivo recibido -->
+                    <div>
+                        <label class="block text-sm font-bold text-gray-700 dark:text-gray-300 mb-2">
+                            Efectivo Recibido *
+                        </label>
+                        <div class="relative">
+                            <span class="absolute left-4 top-1/2 -translate-y-1/2 text-gray-500 dark:text-gray-400 text-xl font-semibold">$</span>
+                            <input
+                                v-model.number="cashReceived"
+                                type="number"
+                                min="0"
+                                step="0.01"
+                                placeholder="0.00"
+                                class="w-full pl-10 pr-4 py-3 text-xl font-bold border-2 border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 placeholder-gray-400"
+                                :class="{
+                                    'border-red-500 focus:ring-red-500 focus:border-red-500': cashReceived > 0 && !isValidCash,
+                                    'border-green-500 focus:ring-green-500 focus:border-green-500': cashReceived > 0 && isValidCash
+                                }"
+                                autofocus
+                            />
+                        </div>
+                        <p class="mt-1.5 text-xs text-gray-500 dark:text-gray-400">
+                            Ingresa el monto en efectivo que recibiste del cliente
+                        </p>
+                    </div>
+
+                    <!-- Mostrar cambio -->
+                    <div v-if="cashReceived > 0" class="bg-gradient-to-br from-gray-50 to-gray-100 dark:from-gray-800 dark:to-gray-900 border border-gray-200 dark:border-gray-700 rounded-xl p-5">
+                        <div class="flex items-center justify-between">
+                            <div>
+                                <p class="text-xs text-gray-500 dark:text-gray-400 uppercase tracking-wide mb-1">
+                                    {{ change >= 0 ? 'Cambio a devolver' : 'Falta' }}
+                                </p>
+                                <p
+                                    class="text-4xl font-bold"
+                                    :class="{
+                                        'text-green-600 dark:text-green-400': change >= 0,
+                                        'text-red-600 dark:text-red-400': change < 0
+                                    }"
+                                >
+                                    ${{ Math.abs(change).toFixed(2) }}
+                                </p>
+                            </div>
+                            <div>
+                                <GoogleIcon
+                                    :name="change >= 0 ? 'check_circle' : 'error'"
+                                    class="text-5xl"
+                                    :class="{
+                                        'text-green-500': change >= 0,
+                                        'text-red-500': change < 0
+                                    }"
+                                />
+                            </div>
+                        </div>
+                    </div>
+
+                    <!-- Advertencia de dinero insuficiente -->
+                    <div v-if="cashReceived > 0 && !isValidCash" class="bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg p-4">
+                        <div class="flex gap-3">
+                            <GoogleIcon name="warning" class="text-red-600 dark:text-red-400 text-xl shrink-0" />
+                            <div>
+                                <p class="text-sm font-semibold text-red-800 dark:text-red-300">
+                                    Efectivo insuficiente
+                                </p>
+                                <p class="text-xs text-red-700 dark:text-red-400 mt-1">
+                                    El dinero recibido debe ser mayor o igual al total de ${{ cart.total.toFixed(2) }}
+                                </p>
+                            </div>
+                        </div>
+                    </div>
+                </div>
             </div>
 
             <!-- Footer -->
@@ -225,7 +358,7 @@ const handleClose = () => {
                 <button
                     type="button"
                     @click="handleConfirm"
-                    :disabled="processing"
+                    :disabled="processing || !canConfirm"
                     class="flex items-center gap-2 px-6 py-2.5 bg-indigo-600 hover:bg-indigo-700 text-white text-sm font-semibold rounded-lg focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-600 shadow-lg shadow-indigo-600/30 transition-all disabled:opacity-50 disabled:cursor-not-allowed disabled:shadow-none"
                 >
                     <GoogleIcon
diff --git a/src/pages/POS/CashRegister/CloseModal.vue b/src/pages/POS/CashRegister/CloseModal.vue
index 402ad7b..48a4118 100644
--- a/src/pages/POS/CashRegister/CloseModal.vue
+++ b/src/pages/POS/CashRegister/CloseModal.vue
@@ -1,7 +1,6 @@
 <script setup>
 import { ref, computed } from 'vue';
 import Modal from '@Holos/Modal.vue';
-import FormInput from '@Holos/Form/Input.vue';
 import GoogleIcon from '@Shared/GoogleIcon.vue';
 
 /** Props */
@@ -35,6 +34,14 @@ const expectedCash = computed(() => initialCash.value + cashSales.value);
 const difference = computed(() => finalCash.value - expectedCash.value);
 const hasDifference = computed(() => Math.abs(difference.value) > 0.01);
 
+const totalCashReceived = computed(() => 
+    parseFloat(props.cashRegister?.total_cash_received || 0)
+);
+
+const totalChangeGiven = computed(() => 
+    parseFloat(props.cashRegister?.total_change_given || 0)
+);
+
 /** Métodos */
 const handleSubmit = () => {
     emit('confirm', {
@@ -122,29 +129,48 @@ const handleClose = () => {
                 </div>
 
                 <!-- Cálculo de Efectivo -->
-                <div class="bg-gray-50 dark:bg-gray-800 rounded-xl p-5 space-y-4 border border-gray-200 dark:border-gray-700">
-                    <h4 class="text-sm font-bold text-gray-900 dark:text-gray-100 uppercase tracking-wide">
+                <div class="bg-gray-50 dark:bg-gray-800 rounded-xl p-5 space-y-4">
+                    <h4 class="text-sm font-bold text-gray-900 dark:text-gray-100">
                         Resumen de Efectivo
                     </h4>
 
-                    <div class="grid grid-cols-2 gap-4">
+                    <div class="space-y-3">
                         <div class="flex justify-between items-center">
                             <span class="text-sm text-gray-600 dark:text-gray-400">Efectivo Inicial:</span>
                             <span class="text-base font-semibold text-gray-900 dark:text-gray-100">
                                 ${{ (initialCash || 0).toLocaleString('es-MX', { minimumFractionDigits: 2 }) }}
                             </span>
                         </div>
-                        <div class="flex justify-between items-center">
-                            <span class="text-sm text-gray-600 dark:text-gray-400">Ventas en Efectivo:</span>
+                        
+                        <!-- Desglose de flujo de efectivo -->
+                        <div class="pl-4 border-l-2 border-green-500 space-y-2">
+                            <div class="flex justify-between items-center text-sm">
+                                <span class="text-gray-600 dark:text-gray-400">Efectivo Recibido:</span>
+                                <span class="text-green-600 dark:text-green-400 font-semibold">
+                                    + ${{ (totalCashReceived || 0).toLocaleString('es-MX', { minimumFractionDigits: 2 }) }}
+                                </span>
+                            </div>
+                            <div class="flex justify-between items-center text-sm">
+                                <span class="text-gray-600 dark:text-gray-400">Cambio Devuelto:</span>
+                                <span class="text-red-600 dark:text-red-400 font-semibold">
+                                    - ${{ (totalChangeGiven || 0).toLocaleString('es-MX', { minimumFractionDigits: 2 }) }}
+                                </span>
+                            </div>
+                        </div>
+
+                        <div class="flex justify-between items-center pt-2 border-t border-gray-300">
+                            <span class="text-sm text-gray-600 dark:text-gray-400">Ventas en Efectivo (Neto):</span>
                             <span class="text-base font-semibold text-green-600 dark:text-green-400">
-                                + ${{ (cashSales || 0).toLocaleString('es-MX', { minimumFractionDigits: 2 }) }}
+                                = ${{ (cashSales || 0).toLocaleString('es-MX', { minimumFractionDigits: 2 }) }}
                             </span>
                         </div>
                     </div>
 
-                    <div class="border-t border-gray-300 dark:border-gray-600 pt-3">
+                    <div class="border-t-2 border-gray-300 dark:border-gray-600 pt-3">
                         <div class="flex justify-between items-center">
-                            <span class="text-base font-bold text-gray-900 dark:text-gray-100">Efectivo Esperado:</span>
+                            <span class="text-base font-bold text-gray-900 dark:text-gray-100">
+                                Efectivo Esperado:
+                            </span>
                             <span class="text-xl font-bold text-blue-600 dark:text-blue-400">
                                 ${{ (expectedCash || 0).toLocaleString('es-MX', { minimumFractionDigits: 2 }) }}
                             </span>
@@ -158,16 +184,16 @@ const handleClose = () => {
                         Efectivo Real en Caja *
                     </label>
                     <div class="relative">
-                        <div class="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
+                        <div class="absolute inset-y-0 left-0 pl-4 flex items-center pointer-events-none">
                             <span class="text-gray-500 dark:text-gray-400 text-lg font-semibold">$</span>
                         </div>
-                        <FormInput
+                        <input
                             v-model.number="finalCash"
                             type="number"
                             min="0"
                             step="0.01"
                             placeholder="0.00"
-                            class="pl-8 text-lg font-semibold"
+                            class="w-full pl-7 pr-4 py-2.5 text-lg font-semibold border border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-orange-500 focus:border-orange-500 bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 placeholder-gray-400"
                             required
                             autofocus
                         />
diff --git a/src/pages/POS/Point.vue b/src/pages/POS/Point.vue
index 44571ee..920456c 100644
--- a/src/pages/POS/Point.vue
+++ b/src/pages/POS/Point.vue
@@ -79,12 +79,12 @@ const closeCheckout = () => {
     showCheckoutModal.value = false;
 };
 
-const handleConfirmSale = async (paymentMethod) => {
+const handleConfirmSale = async (paymentData) => {
     processingPayment.value = true;
 
     try {
         // Establecer método de pago
-        cart.setPaymentMethod(paymentMethod);
+        cart.setPaymentMethod(paymentData.paymentMethod);
 
         // Preparar datos de la venta
         const saleData = {
@@ -92,7 +92,7 @@ const handleConfirmSale = async (paymentMethod) => {
             subtotal: parseFloat(cart.subtotal.toFixed(2)),
             tax: parseFloat(cart.tax.toFixed(2)),
             total: parseFloat(cart.total.toFixed(2)),
-            payment_method: paymentMethod,
+            payment_method: paymentData.paymentMethod,
             items: cart.items.map(item => ({
                 inventory_id: item.inventory_id,
                 product_name: item.product_name,
@@ -102,12 +102,25 @@ const handleConfirmSale = async (paymentMethod) => {
             }))
         };
 
+        // Agregar cash_received si es pago en efectivo
+        if (paymentData.paymentMethod === 'cash' && paymentData.cashReceived) {
+            saleData.cash_received = parseFloat(paymentData.cashReceived.toFixed(2));
+        }
+
         // Crear venta
         window.Notify.info('Procesando venta...');
         const response = await salesService.createSale(saleData);
 
-        // Éxito
-        window.Notify.success('¡Venta realizada exitosamente!');
+        // Mostrar mensaje de éxito con cambio si es efectivo
+        if (paymentData.paymentMethod === 'cash' && response.change !== undefined) {
+            window.Notify.success(
+                `¡Venta realizada! Cambio: $${parseFloat(response.change).toFixed(2)}`,
+                '',
+                8
+            );
+        } else {
+            window.Notify.success('¡Venta realizada exitosamente!');
+        }
 
         if (response && response.id) {
             try {
@@ -139,7 +152,14 @@ const handleConfirmSale = async (paymentMethod) => {
 
     } catch (error) {
         console.error('Error en venta:', error);
-        window.Notify.error(error.message || t('cart.error'));
+
+        // Manejar errores de validación del backend (422)
+        if (error.status === 422 && error.errors) {
+            const errorMessages = Object.values(error.errors).flat();
+            errorMessages.forEach(msg => window.Notify.error(msg));
+        } else {
+            window.Notify.error(error.message || t('cart.error'));
+        }
     } finally {
         processingPayment.value = false;
     }
diff --git a/src/services/salesService.js b/src/services/salesService.js
index d6c086a..757d5aa 100644
--- a/src/services/salesService.js
+++ b/src/services/salesService.js
@@ -14,7 +14,9 @@ const salesService = {
             api.post(apiURL('sales'), {
                 data: saleData,
                 onSuccess: (response) => {
-                    resolve(response.model);
+                    // El backend puede devolver: sale, model, o el objeto directo
+                    // También incluye change, cash_received para pagos en efectivo
+                    resolve(response.sale || response.model || response);
                 },
                 onError: (error) => {
                     reject(error);