diff --git a/pkg/blockbuilder/builder/builder.go b/pkg/blockbuilder/builder/builder.go
index afc1a4a749530..ac8efc3b0bbd5 100644
--- a/pkg/blockbuilder/builder/builder.go
+++ b/pkg/blockbuilder/builder/builder.go
@@ -303,6 +303,7 @@ func (i *BlockBuilder) runOne(ctx context.Context, c *kgo.Client, workerID strin
 
 func (i *BlockBuilder) processJob(ctx context.Context, c *kgo.Client, job *types.Job, logger log.Logger) (lastOffsetConsumed int64, err error) {
 	level.Debug(logger).Log("msg", "beginning job")
+	start := time.Now()
 
 	indexer := newTsdbCreator()
 	appender := newAppender(i.id,
@@ -506,6 +507,7 @@ func (i *BlockBuilder) processJob(ctx context.Context, c *kgo.Client, job *types
 	level.Info(logger).Log(
 		"msg", "successfully processed job",
 		"last_offset", lastOffset,
+		"duration", time.Since(start),
 	)
 
 	return lastOffset, nil