diff --git a/be/src/cloud/cloud_internal_service.cpp b/be/src/cloud/cloud_internal_service.cpp
index e453bc7ee443a2..48e8d6624de77f 100644
--- a/be/src/cloud/cloud_internal_service.cpp
+++ b/be/src/cloud/cloud_internal_service.cpp
@@ -30,6 +30,7 @@
 #include "io/cache/block_file_cache.h"
 #include "io/cache/block_file_cache_downloader.h"
 #include "io/cache/block_file_cache_factory.h"
+#include "io/cache/file_cache_expiration.h"
 #include "runtime/thread_context.h"
 #include "runtime/workload_management/io_throttle.h"
 #include "util/async_io.h"
@@ -446,13 +447,8 @@ void CloudInternalServiceImpl::warm_up_rowset(google::protobuf::RpcController* c
                       << " us, tablet_id: " << rs_meta.tablet_id()
                       << ", rowset_id: " << rowset_id.to_string();
         }
-        int64_t expiration_time =
-                tablet_meta->ttl_seconds() == 0 || rs_meta.newest_write_timestamp() <= 0
-                        ? 0
-                        : rs_meta.newest_write_timestamp() + tablet_meta->ttl_seconds();
-        if (expiration_time <= UnixSeconds()) {
-            expiration_time = 0;
-        }
+        int64_t expiration_time = io::calc_file_cache_expiration_time(
+                rs_meta.newest_write_timestamp(), tablet_meta->ttl_seconds());
 
         if (!tablet->add_rowset_warmup_state(rs_meta, WarmUpTriggerSource::EVENT_DRIVEN)) {
             LOG(INFO) << "found duplicate warmup task for rowset " << rowset_id.to_string()
diff --git a/be/src/cloud/cloud_rowset_writer.cpp b/be/src/cloud/cloud_rowset_writer.cpp
index c5b58049ae42b4..de152ae8341391 100644
--- a/be/src/cloud/cloud_rowset_writer.cpp
+++ b/be/src/cloud/cloud_rowset_writer.cpp
@@ -65,6 +65,9 @@ Status CloudRowsetWriter::init(const RowsetWriterContext& rowset_writer_context)
     if (_context.rowset_state == PREPARED || _context.rowset_state == COMMITTED) {
         _is_pending = true;
         _rowset_meta->set_load_id(_context.load_id);
+        if (_context.newest_write_timestamp > 0) {
+            _rowset_meta->set_newest_write_timestamp(_context.newest_write_timestamp);
+        }
     } else {
         // Rowset generated by compaction or schema change
         _rowset_meta->set_version(_context.version);
diff --git a/be/src/cloud/cloud_tablet.cpp b/be/src/cloud/cloud_tablet.cpp
index 75f3218c5f3cda..99ecc4d8908830 100644
--- a/be/src/cloud/cloud_tablet.cpp
+++ b/be/src/cloud/cloud_tablet.cpp
@@ -47,6 +47,7 @@
 #include "cpp/sync_point.h"
 #include "io/cache/block_file_cache_downloader.h"
 #include "io/cache/block_file_cache_factory.h"
+#include "io/cache/file_cache_expiration.h"
 #include "olap/base_tablet.h"
 #include "olap/compaction.h"
 #include "olap/cumulative_compaction_time_series_policy.h"
@@ -445,12 +446,8 @@ void CloudTablet::add_rowsets(std::vector<RowsetSharedPtr> to_add, bool version_
                         continue;
                     }
 
-                    int64_t expiration_time =
-                            _tablet_meta->ttl_seconds() == 0 ||
-                                            rowset_meta->newest_write_timestamp() <= 0
-                                    ? 0
-                                    : rowset_meta->newest_write_timestamp() +
-                                              _tablet_meta->ttl_seconds();
+                    int64_t expiration_time = io::calc_file_cache_expiration_time(
+                            rowset_meta->newest_write_timestamp(), _tablet_meta->ttl_seconds());
                     g_file_cache_cloud_tablet_submitted_segment_num << 1;
                     if (rs->rowset_meta()->segment_file_size(seg_id) > 0) {
                         g_file_cache_cloud_tablet_submitted_segment_size
diff --git a/be/src/cloud/cloud_warm_up_manager.cpp b/be/src/cloud/cloud_warm_up_manager.cpp
index 85f350ef0b0cd6..dd2b678447c549 100644
--- a/be/src/cloud/cloud_warm_up_manager.cpp
+++ b/be/src/cloud/cloud_warm_up_manager.cpp
@@ -33,6 +33,7 @@
 #include "common/cast_set.h"
 #include "common/logging.h"
 #include "io/cache/block_file_cache_downloader.h"
+#include "io/cache/file_cache_expiration.h"
 #include "olap/rowset/beta_rowset.h"
 #include "olap/rowset/segment_v2/inverted_index_desc.h"
 #include "olap/tablet.h"
@@ -237,13 +238,8 @@ void CloudWarmUpManager::handle_jobs() {
                     continue;
                 }
 
-                int64_t expiration_time =
-                        tablet_meta->ttl_seconds() == 0 || rs->newest_write_timestamp() <= 0
-                                ? 0
-                                : rs->newest_write_timestamp() + tablet_meta->ttl_seconds();
-                if (expiration_time <= UnixSeconds()) {
-                    expiration_time = 0;
-                }
+                int64_t expiration_time = io::calc_file_cache_expiration_time(
+                        rs->newest_write_timestamp(), tablet_meta->ttl_seconds());
                 if (!tablet->add_rowset_warmup_state(*rs, WarmUpTriggerSource::JOB)) {
                     LOG(INFO) << "found duplicate warmup task for rowset " << rs->rowset_id()
                               << ", skip it";
diff --git a/be/src/io/cache/file_cache_expiration.h b/be/src/io/cache/file_cache_expiration.h
new file mode 100644
index 00000000000000..050658ecf77df7
--- /dev/null
+++ b/be/src/io/cache/file_cache_expiration.h
@@ -0,0 +1,47 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#pragma once
+
+#include <cstdint>
+#include <limits>
+
+#include "util/time.h"
+
+namespace doris::io {
+
+// Calc absolute expiration timestamp for file cache TTL mode.
+//
+// Return 0 means treat it as non-TTL cache (NORMAL/INDEX/DISPOSABLE) and avoid
+// putting data into TTL queues / TTL-path directories.
+inline int64_t calc_file_cache_expiration_time(int64_t newest_write_timestamp,
+                                               int64_t ttl_seconds) {
+    if (ttl_seconds <= 0 || newest_write_timestamp <= 0) {
+        return 0;
+    }
+
+    // Overflow protection.
+    if (newest_write_timestamp > std::numeric_limits<int64_t>::max() - ttl_seconds) {
+        return 0;
+    }
+
+    const int64_t expiration_time = newest_write_timestamp + ttl_seconds;
+    // Clamp expired TTL to 0 to keep behavior consistent across read/write/warmup.
+    return expiration_time > UnixSeconds() ? expiration_time : 0;
+}
+
+} // namespace doris::io
diff --git a/be/src/olap/rowset/beta_rowset_reader.cpp b/be/src/olap/rowset/beta_rowset_reader.cpp
index 0b44597ed95671..6a0bb53a48fcc9 100644
--- a/be/src/olap/rowset/beta_rowset_reader.cpp
+++ b/be/src/olap/rowset/beta_rowset_reader.cpp
@@ -30,6 +30,7 @@
 
 #include "common/logging.h"
 #include "common/status.h"
+#include "io/cache/file_cache_expiration.h"
 #include "io/io_common.h"
 #include "olap/block_column_predicate.h"
 #include "olap/column_predicate.h"
@@ -224,13 +225,8 @@ Status BetaRowsetReader::get_segment_iterators(RowsetReaderContext* read_context
                 _read_context->runtime_state->query_options().disable_file_cache;
     }
 
-    _read_options.io_ctx.expiration_time =
-            read_context->ttl_seconds > 0 && _rowset->rowset_meta()->newest_write_timestamp() > 0
-                    ? _rowset->rowset_meta()->newest_write_timestamp() + read_context->ttl_seconds
-                    : 0;
-    if (_read_options.io_ctx.expiration_time <= UnixSeconds()) {
-        _read_options.io_ctx.expiration_time = 0;
-    }
+    _read_options.io_ctx.expiration_time = io::calc_file_cache_expiration_time(
+            _rowset->rowset_meta()->newest_write_timestamp(), read_context->ttl_seconds);
 
     bool enable_segment_cache = true;
     auto* state = read_context->runtime_state;
diff --git a/be/src/olap/rowset/beta_rowset_writer.cpp b/be/src/olap/rowset/beta_rowset_writer.cpp
index 8e0794ce5d3018..d3039182428947 100644
--- a/be/src/olap/rowset/beta_rowset_writer.cpp
+++ b/be/src/olap/rowset/beta_rowset_writer.cpp
@@ -315,6 +315,9 @@ Status BaseBetaRowsetWriter::init(const RowsetWriterContext& rowset_writer_conte
         _is_pending = true;
         _rowset_meta->set_txn_id(_context.txn_id);
         _rowset_meta->set_load_id(_context.load_id);
+        if (_context.newest_write_timestamp > 0) {
+            _rowset_meta->set_newest_write_timestamp(_context.newest_write_timestamp);
+        }
     } else {
         _rowset_meta->set_version(_context.version);
         _rowset_meta->set_newest_write_timestamp(_context.newest_write_timestamp);
diff --git a/be/src/olap/rowset/rowset_writer_context.h b/be/src/olap/rowset/rowset_writer_context.h
index 727c445a61edb4..c57346bca163f2 100644
--- a/be/src/olap/rowset/rowset_writer_context.h
+++ b/be/src/olap/rowset/rowset_writer_context.h
@@ -27,6 +27,7 @@
 
 #include "cloud/config.h"
 #include "common/status.h"
+#include "io/cache/file_cache_expiration.h"
 #include "io/fs/encrypted_fs_factory.h"
 #include "io/fs/file_system.h"
 #include "io/fs/file_writer.h"
@@ -249,9 +250,8 @@ struct RowsetWriterContext {
         return io::FileWriterOptions {
                 .write_file_cache = should_write_cache,
                 .is_cold_data = is_hot_data,
-                .file_cache_expiration = file_cache_ttl_sec > 0 && newest_write_timestamp > 0
-                                                 ? newest_write_timestamp + file_cache_ttl_sec
-                                                 : 0,
+                .file_cache_expiration = io::calc_file_cache_expiration_time(
+                        newest_write_timestamp, static_cast<int64_t>(file_cache_ttl_sec)),
                 .approximate_bytes_to_write = approximate_bytes_to_write};
     }
 };