diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index 7a4bfab9c132..9a9b90fc9d9c 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -94,7 +94,8 @@ API Changes
   TopFieldCollectorManager. Clarify thread-safety documentation. (Prudhvi Godithi)
 
 * GITHUB#16052: Remove IOException from LeafReader#getPointValues, LeafReader#terms,
-  LeafReader#getDocCount signatures. (Ignacio Vera)
+  LeafReader#getDocCount, LeafReader#getSumDocFreq and LeafReader#getSumTotalTermFreq
+  signatures. (Ignacio Vera)
 
 New Features
 ---------------------
diff --git a/lucene/codecs/src/java/org/apache/lucene/codecs/blockterms/BlockTermsReader.java b/lucene/codecs/src/java/org/apache/lucene/codecs/blockterms/BlockTermsReader.java
index e24b2f3b46b0..a228ba976d02 100644
--- a/lucene/codecs/src/java/org/apache/lucene/codecs/blockterms/BlockTermsReader.java
+++ b/lucene/codecs/src/java/org/apache/lucene/codecs/blockterms/BlockTermsReader.java
@@ -287,7 +287,7 @@ public long getSumTotalTermFreq() {
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return sumDocFreq;
     }
 
diff --git a/lucene/codecs/src/java/org/apache/lucene/codecs/bloom/BloomFilteringPostingsFormat.java b/lucene/codecs/src/java/org/apache/lucene/codecs/bloom/BloomFilteringPostingsFormat.java
index 7064e66868d4..7db44cf7963f 100644
--- a/lucene/codecs/src/java/org/apache/lucene/codecs/bloom/BloomFilteringPostingsFormat.java
+++ b/lucene/codecs/src/java/org/apache/lucene/codecs/bloom/BloomFilteringPostingsFormat.java
@@ -235,12 +235,12 @@ public long size() throws IOException {
       }
 
       @Override
-      public long getSumTotalTermFreq() throws IOException {
+      public long getSumTotalTermFreq() {
         return delegateTerms.getSumTotalTermFreq();
       }
 
       @Override
-      public long getSumDocFreq() throws IOException {
+      public long getSumDocFreq() {
         return delegateTerms.getSumDocFreq();
       }
 
diff --git a/lucene/codecs/src/java/org/apache/lucene/codecs/memory/FSTTermsReader.java b/lucene/codecs/src/java/org/apache/lucene/codecs/memory/FSTTermsReader.java
index 397d08827fca..3a7fc1c7503e 100644
--- a/lucene/codecs/src/java/org/apache/lucene/codecs/memory/FSTTermsReader.java
+++ b/lucene/codecs/src/java/org/apache/lucene/codecs/memory/FSTTermsReader.java
@@ -246,7 +246,7 @@ public long getSumTotalTermFreq() {
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return sumDocFreq;
     }
 
diff --git a/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextFieldsReader.java b/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextFieldsReader.java
index 71e44fb0f82f..f7465222a4be 100644
--- a/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextFieldsReader.java
+++ b/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextFieldsReader.java
@@ -769,7 +769,7 @@ public long getSumTotalTermFreq() {
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return sumDocFreq;
     }
 
diff --git a/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextTermVectorsReader.java b/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextTermVectorsReader.java
index 5306cee211e6..1aae10de79ae 100644
--- a/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextTermVectorsReader.java
+++ b/lucene/codecs/src/java/org/apache/lucene/codecs/simpletext/SimpleTextTermVectorsReader.java
@@ -34,6 +34,7 @@
 import static org.apache.lucene.codecs.simpletext.SimpleTextTermVectorsWriter.VECTORS_EXTENSION;
 
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.Map;
@@ -296,18 +297,22 @@ public long size() throws IOException {
     }
 
     @Override
-    public long getSumTotalTermFreq() throws IOException {
-      // TODO: make it constant-time
-      long ttf = 0;
-      TermsEnum iterator = iterator();
-      for (BytesRef b = iterator.next(); b != null; b = iterator.next()) {
-        ttf += iterator.totalTermFreq();
+    public long getSumTotalTermFreq() {
+      try {
+        // TODO: make it constant-time by pre-computing during indexing
+        long ttf = 0;
+        TermsEnum iterator = iterator();
+        for (BytesRef b = iterator.next(); b != null; b = iterator.next()) {
+          ttf += iterator.totalTermFreq();
+        }
+        return ttf;
+      } catch (IOException e) {
+        throw new UncheckedIOException(e);
       }
-      return ttf;
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return terms.size();
     }
 
diff --git a/lucene/core/src/java/org/apache/lucene/codecs/lucene90/compressing/Lucene90CompressingTermVectorsReader.java b/lucene/core/src/java/org/apache/lucene/codecs/lucene90/compressing/Lucene90CompressingTermVectorsReader.java
index 5c1e0ed23b83..d0a39af2408f 100644
--- a/lucene/core/src/java/org/apache/lucene/codecs/lucene90/compressing/Lucene90CompressingTermVectorsReader.java
+++ b/lucene/core/src/java/org/apache/lucene/codecs/lucene90/compressing/Lucene90CompressingTermVectorsReader.java
@@ -1017,12 +1017,12 @@ public long size() throws IOException {
     }
 
     @Override
-    public long getSumTotalTermFreq() throws IOException {
+    public long getSumTotalTermFreq() {
       return totalTermFreq;
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return numTerms;
     }
 
diff --git a/lucene/core/src/java/org/apache/lucene/index/FilterLeafReader.java b/lucene/core/src/java/org/apache/lucene/index/FilterLeafReader.java
index e11dd33c0d07..9e9cb1d76d9a 100644
--- a/lucene/core/src/java/org/apache/lucene/index/FilterLeafReader.java
+++ b/lucene/core/src/java/org/apache/lucene/index/FilterLeafReader.java
@@ -121,12 +121,12 @@ public long size() throws IOException {
     }
 
     @Override
-    public long getSumTotalTermFreq() throws IOException {
+    public long getSumTotalTermFreq() {
       return in.getSumTotalTermFreq();
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return in.getSumDocFreq();
     }
 
diff --git a/lucene/core/src/java/org/apache/lucene/index/LeafReader.java b/lucene/core/src/java/org/apache/lucene/index/LeafReader.java
index 8e010151274e..5d8f5d432667 100644
--- a/lucene/core/src/java/org/apache/lucene/index/LeafReader.java
+++ b/lucene/core/src/java/org/apache/lucene/index/LeafReader.java
@@ -104,7 +104,7 @@ public final long totalTermFreq(Term term) throws IOException {
   }
 
   @Override
-  public final long getSumDocFreq(String field) throws IOException {
+  public final long getSumDocFreq(String field) {
     final Terms terms = terms(field);
     if (terms == null) {
       return 0;
@@ -122,7 +122,7 @@ public final int getDocCount(String field) {
   }
 
   @Override
-  public final long getSumTotalTermFreq(String field) throws IOException {
+  public final long getSumTotalTermFreq(String field) {
     final Terms terms = terms(field);
     if (terms == null) {
       return 0;
diff --git a/lucene/core/src/java/org/apache/lucene/index/MappedMultiFields.java b/lucene/core/src/java/org/apache/lucene/index/MappedMultiFields.java
index fb87b54e1710..5978d63e7cb7 100644
--- a/lucene/core/src/java/org/apache/lucene/index/MappedMultiFields.java
+++ b/lucene/core/src/java/org/apache/lucene/index/MappedMultiFields.java
@@ -77,12 +77,12 @@ public long size() throws IOException {
     }
 
     @Override
-    public long getSumTotalTermFreq() throws IOException {
+    public long getSumTotalTermFreq() {
       throw new UnsupportedOperationException();
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       throw new UnsupportedOperationException();
     }
 
diff --git a/lucene/core/src/java/org/apache/lucene/index/MultiTerms.java b/lucene/core/src/java/org/apache/lucene/index/MultiTerms.java
index 9b4f6c48828a..819033df0cd1 100644
--- a/lucene/core/src/java/org/apache/lucene/index/MultiTerms.java
+++ b/lucene/core/src/java/org/apache/lucene/index/MultiTerms.java
@@ -200,7 +200,7 @@ public long size() {
   }
 
   @Override
-  public long getSumTotalTermFreq() throws IOException {
+  public long getSumTotalTermFreq() {
     long sum = 0;
     for (Terms terms : subs) {
       final long v = terms.getSumTotalTermFreq();
@@ -211,7 +211,7 @@ public long getSumTotalTermFreq() throws IOException {
   }
 
   @Override
-  public long getSumDocFreq() throws IOException {
+  public long getSumDocFreq() {
     long sum = 0;
     for (Terms terms : subs) {
       final long v = terms.getSumDocFreq();
diff --git a/lucene/core/src/java/org/apache/lucene/index/Terms.java b/lucene/core/src/java/org/apache/lucene/index/Terms.java
index 3f3b5bc38026..e532ff4583d8 100644
--- a/lucene/core/src/java/org/apache/lucene/index/Terms.java
+++ b/lucene/core/src/java/org/apache/lucene/index/Terms.java
@@ -106,13 +106,13 @@ protected BytesRef nextSeekTerm(BytesRef term) throws IOException {
    * Returns the sum of {@link TermsEnum#totalTermFreq} for all terms in this field. Note that, just
    * like other term measures, this measure does not take deleted documents into account.
    */
-  public abstract long getSumTotalTermFreq() throws IOException;
+  public abstract long getSumTotalTermFreq();
 
   /**
    * Returns the sum of {@link TermsEnum#docFreq()} for all terms in this field. Note that, just
    * like other term measures, this measure does not take deleted documents into account.
    */
-  public abstract long getSumDocFreq() throws IOException;
+  public abstract long getSumDocFreq();
 
   /**
    * Returns the number of documents that have at least one term for this field. Note that, just
@@ -237,12 +237,12 @@ public long size() throws IOException {
         }
 
         @Override
-        public long getSumTotalTermFreq() throws IOException {
+        public long getSumTotalTermFreq() {
           return 0;
         }
 
         @Override
-        public long getSumDocFreq() throws IOException {
+        public long getSumDocFreq() {
           return 0;
         }
 
diff --git a/lucene/core/src/test/org/apache/lucene/index/TestMultiTermsEnum.java b/lucene/core/src/test/org/apache/lucene/index/TestMultiTermsEnum.java
index 745526379bb3..cc5a4c63b9ef 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestMultiTermsEnum.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestMultiTermsEnum.java
@@ -139,12 +139,12 @@ public long size() throws IOException {
         }
 
         @Override
-        public long getSumTotalTermFreq() throws IOException {
+        public long getSumTotalTermFreq() {
           throw new UnsupportedOperationException();
         }
 
         @Override
-        public long getSumDocFreq() throws IOException {
+        public long getSumDocFreq() {
           throw new UnsupportedOperationException();
         }
 
diff --git a/lucene/core/src/test/org/apache/lucene/util/TestDocIdSetBuilder.java b/lucene/core/src/test/org/apache/lucene/util/TestDocIdSetBuilder.java
index efc8642383c4..157fb08348ea 100644
--- a/lucene/core/src/test/org/apache/lucene/util/TestDocIdSetBuilder.java
+++ b/lucene/core/src/test/org/apache/lucene/util/TestDocIdSetBuilder.java
@@ -283,12 +283,12 @@ public long size() throws IOException {
     }
 
     @Override
-    public long getSumTotalTermFreq() throws IOException {
+    public long getSumTotalTermFreq() {
       throw new UnsupportedOperationException();
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return numValues;
     }
 
diff --git a/lucene/test-framework/src/java/org/apache/lucene/tests/codecs/ramonly/RAMOnlyPostingsFormat.java b/lucene/test-framework/src/java/org/apache/lucene/tests/codecs/ramonly/RAMOnlyPostingsFormat.java
index c26a65f9b76b..791acf1824c5 100644
--- a/lucene/test-framework/src/java/org/apache/lucene/tests/codecs/ramonly/RAMOnlyPostingsFormat.java
+++ b/lucene/test-framework/src/java/org/apache/lucene/tests/codecs/ramonly/RAMOnlyPostingsFormat.java
@@ -114,7 +114,7 @@ public long getSumTotalTermFreq() {
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       return sumDocFreq;
     }
 
diff --git a/lucene/test-framework/src/java/org/apache/lucene/tests/index/AssertingLeafReader.java b/lucene/test-framework/src/java/org/apache/lucene/tests/index/AssertingLeafReader.java
index 8964507556b9..0c8705240492 100644
--- a/lucene/test-framework/src/java/org/apache/lucene/tests/index/AssertingLeafReader.java
+++ b/lucene/test-framework/src/java/org/apache/lucene/tests/index/AssertingLeafReader.java
@@ -239,7 +239,7 @@ public int getDocCount() {
     }
 
     @Override
-    public long getSumDocFreq() throws IOException {
+    public long getSumDocFreq() {
       assertThread("Terms", creationThread);
       final long sumDf = in.getSumDocFreq();
       assert sumDf >= getDocCount();
@@ -247,7 +247,7 @@ public long getSumDocFreq() throws IOException {
     }
 
     @Override
-    public long getSumTotalTermFreq() throws IOException {
+    public long getSumTotalTermFreq() {
       assertThread("Terms", creationThread);
       final long sumTtf = in.getSumTotalTermFreq();
       if (hasFreqs() == false) {