diff --git a/backend/s3/s3.go b/backend/s3/s3.go
index c5ca85db7..18171904e 100644
--- a/backend/s3/s3.go
+++ b/backend/s3/s3.go
@@ -55,6 +55,7 @@ import (
 	"github.com/rclone/rclone/lib/encoder"
 	"github.com/rclone/rclone/lib/multipart"
 	"github.com/rclone/rclone/lib/pacer"
+	"github.com/rclone/rclone/lib/pool"
 	"github.com/rclone/rclone/lib/readers"
 	"github.com/rclone/rclone/lib/rest"
 	"github.com/rclone/rclone/lib/version"
@@ -5403,6 +5404,12 @@ func (w *s3ChunkWriter) WriteChunk(ctx context.Context, chunkNumber int, reader
 		err := fmt.Errorf("invalid chunk number provided: %v", chunkNumber)
 		return -1, err
 	}
+	// Only account after the checksum reads have been done
+	if do, ok := reader.(pool.DelayAccountinger); ok {
+		// To figure out this number, do a transfer and if the accounted size is 0 or a
+		// multiple of what it should be, increase or decrease this number.
+		do.DelayAccounting(3)
+	}
 
 	// create checksum of buffer for integrity checking
 	// currently there is no way to calculate the md5 without reading the chunk a 2nd time (1st read is in uploadMultipart)