diff --git a/api/layer/tree_mock.go b/api/layer/tree_mock.go
index df1724d..8dda9df 100644
--- a/api/layer/tree_mock.go
+++ b/api/layer/tree_mock.go
@@ -20,33 +20,38 @@ type TreeServiceMock struct {
 	parts      map[string]map[int]*data.PartInfo
 }
 
+func (t *TreeServiceMock) GetObjectTaggingAndLock(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion) (map[string]string, *data.LockInfo, error) {
+	// TODO implement me
+	panic("implement me")
+}
+
 func (t *TreeServiceMock) GetObjectTagging(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion) (map[string]string, error) {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 
 func (t *TreeServiceMock) PutObjectTagging(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion, tagSet map[string]string) error {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 
 func (t *TreeServiceMock) DeleteObjectTagging(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion) error {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 
 func (t *TreeServiceMock) GetBucketTagging(ctx context.Context, cnrID *cid.ID) (map[string]string, error) {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 
 func (t *TreeServiceMock) PutBucketTagging(ctx context.Context, cnrID *cid.ID, tagSet map[string]string) error {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 
 func (t *TreeServiceMock) DeleteBucketTagging(ctx context.Context, cnrID *cid.ID) error {
-	//TODO implement me
+	// TODO implement me
 	panic("implement me")
 }
 
diff --git a/api/layer/tree_service.go b/api/layer/tree_service.go
index c328e68..ab8353b 100644
--- a/api/layer/tree_service.go
+++ b/api/layer/tree_service.go
@@ -59,6 +59,11 @@ type TreeService interface {
 	// If a part is being added for the first time, the previous part ID will be nil.
 	AddPart(ctx context.Context, cnrID *cid.ID, multipartNodeID uint64, info *data.PartInfo) (oldObjIDToDelete *oid.ID, err error)
 	GetParts(ctx context.Context, cnrID *cid.ID, multipartNodeID uint64) ([]*data.PartInfo, error)
+
+	// Compound methods for optimizations
+
+	// GetObjectTaggingAndLock unifies GetObjectTagging and GetLock methods in single tree service invocation.
+	GetObjectTaggingAndLock(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion) (map[string]string, *data.LockInfo, error)
 }
 
 // ErrNodeNotFound is returned from Tree service in case of not found error.
diff --git a/internal/neofs/tree.go b/internal/neofs/tree.go
index 0fadb3a..01761bc 100644
--- a/internal/neofs/tree.go
+++ b/internal/neofs/tree.go
@@ -369,8 +369,12 @@ func (c *TreeClient) GetObjectTagging(ctx context.Context, cnrID *cid.ID, objVer
 		return nil, err
 	}
 
+	return getObjectTagging(tagNode), nil
+}
+
+func getObjectTagging(tagNode *TreeNode) map[string]string {
 	if tagNode == nil {
-		return nil, nil
+		return nil
 	}
 
 	meta := make(map[string]string)
@@ -381,7 +385,7 @@ func (c *TreeClient) GetObjectTagging(ctx context.Context, cnrID *cid.ID, objVer
 		}
 	}
 
-	return meta, nil
+	return meta
 }
 
 func (c *TreeClient) PutObjectTagging(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion, tagSet map[string]string) error {
@@ -916,6 +920,10 @@ func (c *TreeClient) GetLock(ctx context.Context, cnrID *cid.ID, nodeID uint64)
 		return nil, err
 	}
 
+	return getLock(lockNode)
+}
+
+func getLock(lockNode *TreeNode) (*data.LockInfo, error) {
 	lockInfo := &data.LockInfo{}
 	if lockNode == nil {
 		return lockInfo, nil
@@ -924,7 +932,7 @@ func (c *TreeClient) GetLock(ctx context.Context, cnrID *cid.ID, nodeID uint64)
 
 	if legalHold, ok := lockNode.Get(legalHoldOIDKV); ok {
 		var legalHoldOID oid.ID
-		if err = legalHoldOID.DecodeString(legalHold); err != nil {
+		if err := legalHoldOID.DecodeString(legalHold); err != nil {
 			return nil, fmt.Errorf("invalid legal hold object id: %w", err)
 		}
 		lockInfo.LegalHoldOID = &legalHoldOID
@@ -932,7 +940,7 @@ func (c *TreeClient) GetLock(ctx context.Context, cnrID *cid.ID, nodeID uint64)
 
 	if retention, ok := lockNode.Get(retentionOIDKV); ok {
 		var retentionOID oid.ID
-		if err = retentionOID.DecodeString(retention); err != nil {
+		if err := retentionOID.DecodeString(retention); err != nil {
 			return nil, fmt.Errorf("invalid retention object id: %w", err)
 		}
 		lockInfo.RetentionOID = &retentionOID
@@ -944,6 +952,20 @@ func (c *TreeClient) GetLock(ctx context.Context, cnrID *cid.ID, nodeID uint64)
 	return lockInfo, nil
 }
 
+func (c *TreeClient) GetObjectTaggingAndLock(ctx context.Context, cnrID *cid.ID, objVersion *data.NodeVersion) (map[string]string, *data.LockInfo, error) {
+	nodes, err := c.getTreeNodes(ctx, cnrID, objVersion.ID, isTagKV, isLockKV)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	lockInfo, err := getLock(nodes[isLockKV])
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return getObjectTagging(nodes[isTagKV]), lockInfo, nil
+}
+
 func (c *TreeClient) Close() error {
 	if c.conn != nil {
 		return c.conn.Close()