diff --git a/esphome/components/time/posix_tz.cpp b/esphome/components/time/posix_tz.cpp
index 178eaff191..972092fb7c 100644
--- a/esphome/components/time/posix_tz.cpp
+++ b/esphome/components/time/posix_tz.cpp
@@ -403,13 +403,6 @@ bool is_in_dst(time_t utc_epoch, const ParsedTimezone &tz) {
   }
 }
 
-int32_t get_utc_offset(time_t utc_epoch, const ParsedTimezone &tz) {
-  if (is_in_dst(utc_epoch, tz)) {
-    return tz.dst_offset_seconds;
-  }
-  return tz.std_offset_seconds;
-}
-
 bool epoch_to_local_tm(time_t utc_epoch, const ParsedTimezone &tz, struct tm *out_tm) {
   if (!out_tm) {
     return false;
diff --git a/esphome/components/time/posix_tz.h b/esphome/components/time/posix_tz.h
index 70f2a84851..ed7a1d8120 100644
--- a/esphome/components/time/posix_tz.h
+++ b/esphome/components/time/posix_tz.h
@@ -66,12 +66,6 @@ bool is_in_dst(time_t utc_epoch, const ParsedTimezone &tz);
 /// @return true on success
 bool epoch_to_local_tm(time_t utc_epoch, const ParsedTimezone &tz, struct tm *out_tm);
 
-/// Get the current offset from UTC in seconds for a given epoch.
-/// @param utc_epoch Unix timestamp in UTC
-/// @param tz The parsed timezone
-/// @return Offset in seconds (positive = behind UTC, negative = ahead)
-int32_t get_utc_offset(time_t utc_epoch, const ParsedTimezone &tz);
-
 // Internal helper functions exposed for testing
 
 namespace internal {