diff --git a/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldMergeState.java b/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldMergeState.java
index 15e65091aed..824fe951b5a 100644
--- a/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldMergeState.java
+++ b/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldMergeState.java
@@ -69,7 +69,8 @@ final class PerFieldMergeState {
         in.maxDocs,
         in.infoStream,
         in.intraMergeTaskExecutor,
-        in.needsIndexSort);
+        in.needsIndexSort,
+        in.mergeProgress);
   }
 
   private static class FilterFieldInfos extends FieldInfos {
diff --git a/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java b/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
index def9ef06fce..e7f99df5668 100644
--- a/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
+++ b/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
@@ -3453,7 +3453,8 @@ public class IndexWriter
             trackingDir,
             globalFieldNumberMap,
             context,
-            intraMergeExecutor);
+            intraMergeExecutor,
+            merge.getMergeProgress());
 
     if (!merger.shouldMerge()) {
       return;
@@ -5254,7 +5255,8 @@ public class IndexWriter
               dirWrapper,
               globalFieldNumberMap,
               context,
-              intraMergeExecutor);
+              intraMergeExecutor,
+              merge.getMergeProgress());
       merge.info.setSoftDelCount(Math.toIntExact(softDeleteCount.get()));
       merge.checkAborted();
 
diff --git a/lucene/core/src/java/org/apache/lucene/index/MergeState.java b/lucene/core/src/java/org/apache/lucene/index/MergeState.java
index 838699215f0..66aab07fe23 100644
--- a/lucene/core/src/java/org/apache/lucene/index/MergeState.java
+++ b/lucene/core/src/java/org/apache/lucene/index/MergeState.java
@@ -91,17 +91,22 @@ public class MergeState {
   /** Indicates if the index needs to be sorted * */
   public boolean needsIndexSort;
 
+  /** Progress and state for an executing merge. */
+  public final MergePolicy.OneMergeProgress mergeProgress;
+
   /** Sole constructor. */
   MergeState(
       List<CodecReader> readers,
       SegmentInfo segmentInfo,
       InfoStream infoStream,
-      Executor intraMergeTaskExecutor)
+      Executor intraMergeTaskExecutor,
+      MergePolicy.OneMergeProgress mergeProgress)
       throws IOException {
     verifyIndexSort(readers, segmentInfo);
     this.infoStream = infoStream;
     int numReaders = readers.size();
     this.intraMergeTaskExecutor = intraMergeTaskExecutor;
+    this.mergeProgress = mergeProgress;
 
     maxDocs = new int[numReaders];
     fieldsProducers = new FieldsProducer[numReaders];
@@ -284,7 +289,8 @@ public class MergeState {
       int[] maxDocs,
       InfoStream infoStream,
       Executor intraMergeTaskExecutor,
-      boolean needsIndexSort) {
+      boolean needsIndexSort,
+      MergePolicy.OneMergeProgress mergeProgress) {
     this.docMaps = docMaps;
     this.segmentInfo = segmentInfo;
     this.mergeFieldInfos = mergeFieldInfos;
@@ -301,5 +307,6 @@ public class MergeState {
     this.infoStream = infoStream;
     this.intraMergeTaskExecutor = intraMergeTaskExecutor;
     this.needsIndexSort = needsIndexSort;
+    this.mergeProgress = mergeProgress;
   }
 }
diff --git a/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java b/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
index 5e336c7fef0..7b3c8651d22 100644
--- a/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
+++ b/lucene/core/src/java/org/apache/lucene/index/SegmentMerger.java
@@ -59,13 +59,15 @@ final class SegmentMerger {
       Directory dir,
       FieldInfos.FieldNumbers fieldNumbers,
       IOContext context,
-      Executor intraMergeTaskExecutor)
+      Executor intraMergeTaskExecutor,
+      MergePolicy.OneMergeProgress mergeProgress)
       throws IOException {
     if (context.context() != IOContext.Context.MERGE) {
       throw new IllegalArgumentException(
           "IOContext.context should be MERGE; got: " + context.context());
     }
-    mergeState = new MergeState(readers, segmentInfo, infoStream, intraMergeTaskExecutor);
+    mergeState =
+        new MergeState(readers, segmentInfo, infoStream, intraMergeTaskExecutor, mergeProgress);
     mergeStateCreationThread = Thread.currentThread();
     directory = dir;
     this.codec = segmentInfo.getCodec();
diff --git a/lucene/core/src/test/org/apache/lucene/index/TestDoc.java b/lucene/core/src/test/org/apache/lucene/index/TestDoc.java
index 0cdd645e7e0..da7e8572ce7 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestDoc.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestDoc.java
@@ -230,7 +230,6 @@ public class TestDoc extends LuceneTestCase {
             StringHelper.randomId(),
             new HashMap<>(),
             null);
-
     SegmentMerger merger =
         new SegmentMerger(
             Arrays.<CodecReader>asList(r1, r2),
@@ -239,8 +238,8 @@ public class TestDoc extends LuceneTestCase {
             trackingDir,
             new FieldInfos.FieldNumbers(null, null),
             context,
-            new SameThreadExecutorService());
-
+            new SameThreadExecutorService(),
+            new MergePolicy.OneMergeProgress());
     merger.merge();
     r1.close();
     r2.close();
diff --git a/lucene/core/src/test/org/apache/lucene/index/TestSegmentMerger.java b/lucene/core/src/test/org/apache/lucene/index/TestSegmentMerger.java
index d3f7ec8a803..0d27ca7bbdb 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestSegmentMerger.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestSegmentMerger.java
@@ -107,7 +107,8 @@ public class TestSegmentMerger extends LuceneTestCase {
             mergedDir,
             new FieldInfos.FieldNumbers(null, null),
             newIOContext(random(), new IOContext(new MergeInfo(-1, -1, false, -1))),
-            new SameThreadExecutorService());
+            new SameThreadExecutorService(),
+            new MergePolicy.OneMergeProgress());
     MergeState mergeState = merger.merge();
     int docsMerged = mergeState.segmentInfo.maxDoc();
     assertTrue(docsMerged == 2);