diff --git a/internal/modules/purchases/controllers/purchase.controller.go b/internal/modules/purchases/controllers/purchase.controller.go
index a2cf6fad..985349f0 100644
--- a/internal/modules/purchases/controllers/purchase.controller.go
+++ b/internal/modules/purchases/controllers/purchase.controller.go
@@ -40,7 +40,7 @@ func (ctrl *PurchaseController) GetAll(c *fiber.Ctx) error {
 		SupplierID:        uint(c.QueryInt("supplier_id", 0)),
 		AreaID:            uint(c.QueryInt("area_id", 0)),
 		LocationID:        uint(c.QueryInt("location_id", 0)),
-		ProductCategoryID: uint(c.QueryInt("product_category_id", 0)),
+		ProductCategoryID: strings.TrimSpace(c.Query("product_category_id")),
 	}
 
 	if query.Page < 1 || query.Limit < 1 {
diff --git a/internal/modules/purchases/services/purchase.service.go b/internal/modules/purchases/services/purchase.service.go
index 1935d9da..ff8ef614 100644
--- a/internal/modules/purchases/services/purchase.service.go
+++ b/internal/modules/purchases/services/purchase.service.go
@@ -7,6 +7,7 @@ import (
 	"math"
 	"mime/multipart"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
 
@@ -146,6 +147,11 @@ func (s *purchaseService) GetAll(c *fiber.Ctx, params *validation.Query) ([]enti
 		return nil, 0, utils.BadRequest(err.Error())
 	}
 
+	productCategoryIDs, err := parseUintCSVFilter(params.ProductCategoryID, "product_category_id")
+	if err != nil {
+		return nil, 0, utils.BadRequest(err.Error())
+	}
+
 	var poDateStart *time.Time
 	var poDateEnd *time.Time
 
@@ -165,7 +171,10 @@ func (s *purchaseService) GetAll(c *fiber.Ctx, params *validation.Query) ([]enti
 	}
 
 	search := strings.ToLower(strings.TrimSpace(params.Search))
-	approvalStatus := normalizeApprovalStatusFilter(params.ApprovalStatus)
+	approvalStatuses := parseStringCSVFilter(params.ApprovalStatus)
+	for i := range approvalStatuses {
+		approvalStatuses[i] = normalizeApprovalStatusFilter(approvalStatuses[i])
+	}
 
 	purchases, total, err := s.PurchaseRepo.GetAll(c.Context(), offset, params.Limit, func(db *gorm.DB) *gorm.DB {
 		db = s.withRelations(db)
@@ -230,46 +239,53 @@ func (s *purchaseService) GetAll(c *fiber.Ctx, params *validation.Query) ([]enti
 			)
 		}
 
-		if params.ProductCategoryID > 0 {
+		if len(productCategoryIDs) > 0 {
 			db = db.Where(
 				`EXISTS (
 					SELECT 1
 					FROM purchase_items pi
 					JOIN products p ON p.id = pi.product_id
-					WHERE pi.purchase_id = purchases.id AND p.product_category_id = ?
+					WHERE pi.purchase_id = purchases.id AND p.product_category_id IN ?
 				)`,
-				params.ProductCategoryID,
+				productCategoryIDs,
 			)
 		}
 
-		if approvalStatus != "" {
-			approvalLike := "%" + approvalStatus + "%"
-			db = db.Where(
-				`EXISTS (
-					SELECT 1
-					FROM approvals a
-					WHERE a.approvable_type = ?
-						AND a.approvable_id = purchases.id
-						AND a.id = (
-							SELECT a2.id
-							FROM approvals a2
-							WHERE a2.approvable_type = ?
-								AND a2.approvable_id = purchases.id
-							ORDER BY a2.action_at DESC, a2.id DESC
-							LIMIT 1
-						)
-						AND (
-							LOWER(COALESCE(a.step_name, '')) LIKE ?
-							OR LOWER(COALESCE(CAST(a.action AS TEXT), '')) LIKE ?
-							OR CAST(a.step_number AS TEXT) = ?
-						)
-				)`,
-				utils.ApprovalWorkflowPurchase.String(),
-				utils.ApprovalWorkflowPurchase.String(),
-				approvalLike,
-				approvalLike,
-				approvalStatus,
-			)
+		if len(approvalStatuses) > 0 {
+			approvalConditions := make([]string, 0, len(approvalStatuses))
+			approvalArgs := make([]any, 0, 2+(len(approvalStatuses)*3))
+			approvalArgs = append(approvalArgs, utils.ApprovalWorkflowPurchase.String(), utils.ApprovalWorkflowPurchase.String())
+			for _, status := range approvalStatuses {
+				if status == "" {
+					continue
+				}
+				like := "%" + status + "%"
+				approvalConditions = append(approvalConditions, `(LOWER(COALESCE(a.step_name, '')) LIKE ? OR LOWER(COALESCE(CAST(a.action AS TEXT), '')) LIKE ? OR CAST(a.step_number AS TEXT) = ?)`)
+				approvalArgs = append(approvalArgs, like, like, status)
+			}
+
+			if len(approvalConditions) > 0 {
+				approvalClause := strings.Join(approvalConditions, " OR ")
+				approvalQuery := fmt.Sprintf(
+					`EXISTS (
+						SELECT 1
+						FROM approvals a
+						WHERE a.approvable_type = ?
+							AND a.approvable_id = purchases.id
+							AND a.id = (
+								SELECT a2.id
+								FROM approvals a2
+								WHERE a2.approvable_type = ?
+									AND a2.approvable_id = purchases.id
+								ORDER BY a2.action_at DESC, a2.id DESC
+								LIMIT 1
+							)
+							AND (%s)
+					)`,
+					approvalClause,
+				)
+				db = db.Where(approvalQuery, approvalArgs...)
+			}
 		}
 
 		if search != "" {
@@ -2191,6 +2207,51 @@ func normalizeApprovalStatusFilter(raw string) string {
 	}
 }
 
+func parseUintCSVFilter(raw, fieldName string) ([]uint, error) {
+	parts := strings.Split(raw, ",")
+	result := make([]uint, 0, len(parts))
+	seen := make(map[uint]struct{}, len(parts))
+
+	for _, part := range parts {
+		value := strings.TrimSpace(part)
+		if value == "" {
+			continue
+		}
+		num, err := strconv.ParseUint(value, 10, 64)
+		if err != nil || num == 0 {
+			return nil, fmt.Errorf("%s contains invalid value: %s", fieldName, value)
+		}
+		u := uint(num)
+		if _, exists := seen[u]; exists {
+			continue
+		}
+		seen[u] = struct{}{}
+		result = append(result, u)
+	}
+
+	return result, nil
+}
+
+func parseStringCSVFilter(raw string) []string {
+	parts := strings.Split(raw, ",")
+	result := make([]string, 0, len(parts))
+	seen := make(map[string]struct{}, len(parts))
+
+	for _, part := range parts {
+		value := strings.ToLower(strings.TrimSpace(part))
+		if value == "" {
+			continue
+		}
+		if _, exists := seen[value]; exists {
+			continue
+		}
+		seen[value] = struct{}{}
+		result = append(result, value)
+	}
+
+	return result
+}
+
 func parseApprovalActionInput(raw string) (entity.ApprovalAction, error) {
 	value := strings.ToUpper(strings.TrimSpace(raw))
 	switch value {
diff --git a/internal/modules/purchases/validations/purchase.validation.go b/internal/modules/purchases/validations/purchase.validation.go
index dcd55499..2e21f0d9 100644
--- a/internal/modules/purchases/validations/purchase.validation.go
+++ b/internal/modules/purchases/validations/purchase.validation.go
@@ -66,9 +66,9 @@ type Query struct {
 	SupplierID        uint   `query:"supplier_id" validate:"omitempty,gt=0"`
 	AreaID            uint   `query:"area_id" validate:"omitempty,gt=0"`
 	LocationID        uint   `query:"location_id" validate:"omitempty,gt=0"`
-	ProductCategoryID uint   `query:"product_category_id" validate:"omitempty,gt=0"`
+	ProductCategoryID string `query:"product_category_id" validate:"omitempty,max=500"`
 	Search            string `query:"search" validate:"omitempty,max=100"`
-	ApprovalStatus    string `query:"approval_status" validate:"omitempty,max=100"`
+	ApprovalStatus    string `query:"approval_status" validate:"omitempty,max=500"`
 	PoDate            string `query:"po_date" validate:"omitempty,datetime=2006-01-02"`
 	PoDateFrom        string `query:"po_date_from" validate:"omitempty,datetime=2006-01-02"`
 	PoDateTo          string `query:"po_date_to" validate:"omitempty,datetime=2006-01-02"`