diff --git a/esphome/core/component.cpp b/esphome/core/component.cpp
index 90aa36f4db..a452f4d400 100644
--- a/esphome/core/component.cpp
+++ b/esphome/core/component.cpp
@@ -76,36 +76,8 @@ void store_component_error_message(const Component *component, const char *messa
 }
 }  // namespace
 
-namespace setup_priority {
-
-const float BUS = 1000.0f;
-const float IO = 900.0f;
-const float HARDWARE = 800.0f;
-const float DATA = 600.0f;
-const float PROCESSOR = 400.0;
-const float BLUETOOTH = 350.0f;
-const float AFTER_BLUETOOTH = 300.0f;
-const float WIFI = 250.0f;
-const float ETHERNET = 250.0f;
-const float BEFORE_CONNECTION = 220.0f;
-const float AFTER_WIFI = 200.0f;
-const float AFTER_CONNECTION = 100.0f;
-const float LATE = -100.0f;
-
-}  // namespace setup_priority
-
-// Component state uses bits 0-2 (8 states, 5 used)
-const uint8_t COMPONENT_STATE_MASK = 0x07;
-const uint8_t COMPONENT_STATE_CONSTRUCTION = 0x00;
-const uint8_t COMPONENT_STATE_SETUP = 0x01;
-const uint8_t COMPONENT_STATE_LOOP = 0x02;
-const uint8_t COMPONENT_STATE_FAILED = 0x03;
-const uint8_t COMPONENT_STATE_LOOP_DONE = 0x04;
-// Status LED uses bits 3-4
-const uint8_t STATUS_LED_MASK = 0x18;
-const uint8_t STATUS_LED_OK = 0x00;
-const uint8_t STATUS_LED_WARNING = 0x08;  // Bit 3
-const uint8_t STATUS_LED_ERROR = 0x10;    // Bit 4
+// setup_priority, component state, and status LED constants are now
+// constexpr in component.h
 
 const uint16_t WARN_IF_BLOCKING_OVER_MS = 50U;       ///< Initial blocking time allowed without warning
 const uint16_t WARN_IF_BLOCKING_INCREMENT_MS = 10U;  ///< How long the blocking time must be larger to warn again
diff --git a/esphome/core/component.h b/esphome/core/component.h
index 9ab77cc2f9..848bc0ba35 100644
--- a/esphome/core/component.h
+++ b/esphome/core/component.h
@@ -21,33 +21,31 @@ struct LogString;
 namespace setup_priority {
 
 /// For communication buses like i2c/spi
-extern const float BUS;
+inline constexpr float BUS = 1000.0f;
 /// For components that represent GPIO pins like PCF8573
-extern const float IO;
+inline constexpr float IO = 900.0f;
 /// For components that deal with hardware and are very important like GPIO switch
-extern const float HARDWARE;
+inline constexpr float HARDWARE = 800.0f;
 /// For components that import data from directly connected sensors like DHT.
-extern const float DATA;
-/// Alias for DATA (here for compatibility reasons)
-extern const float HARDWARE_LATE;
+inline constexpr float DATA = 600.0f;
 /// For components that use data from sensors like displays
-extern const float PROCESSOR;
-extern const float BLUETOOTH;
-extern const float AFTER_BLUETOOTH;
-extern const float WIFI;
-extern const float ETHERNET;
+inline constexpr float PROCESSOR = 400.0f;
+inline constexpr float BLUETOOTH = 350.0f;
+inline constexpr float AFTER_BLUETOOTH = 300.0f;
+inline constexpr float WIFI = 250.0f;
+inline constexpr float ETHERNET = 250.0f;
 /// For components that should be initialized after WiFi and before API is connected.
-extern const float BEFORE_CONNECTION;
+inline constexpr float BEFORE_CONNECTION = 220.0f;
 /// For components that should be initialized after WiFi is connected.
-extern const float AFTER_WIFI;
+inline constexpr float AFTER_WIFI = 200.0f;
 /// For components that should be initialized after a data connection (API/MQTT) is connected.
-extern const float AFTER_CONNECTION;
+inline constexpr float AFTER_CONNECTION = 100.0f;
 /// For components that should be initialized at the very end of the setup process.
-extern const float LATE;
+inline constexpr float LATE = -100.0f;
 
 }  // namespace setup_priority
 
-static const uint32_t SCHEDULER_DONT_RUN = 4294967295UL;
+inline constexpr uint32_t SCHEDULER_DONT_RUN = 4294967295UL;
 
 /// Type-safe scheduler IDs for core base classes.
 /// Uses a separate NameType (NUMERIC_ID_INTERNAL) so IDs can never collide
@@ -65,16 +63,18 @@ void log_update_interval(const char *tag, PollingComponent *component);
 
 #define LOG_UPDATE_INTERVAL(this) log_update_interval(TAG, this)
 
-extern const uint8_t COMPONENT_STATE_MASK;
-extern const uint8_t COMPONENT_STATE_CONSTRUCTION;
-extern const uint8_t COMPONENT_STATE_SETUP;
-extern const uint8_t COMPONENT_STATE_LOOP;
-extern const uint8_t COMPONENT_STATE_FAILED;
-extern const uint8_t COMPONENT_STATE_LOOP_DONE;
-extern const uint8_t STATUS_LED_MASK;
-extern const uint8_t STATUS_LED_OK;
-extern const uint8_t STATUS_LED_WARNING;
-extern const uint8_t STATUS_LED_ERROR;
+// Component state uses bits 0-2 (8 states, 5 used)
+inline constexpr uint8_t COMPONENT_STATE_MASK = 0x07;
+inline constexpr uint8_t COMPONENT_STATE_CONSTRUCTION = 0x00;
+inline constexpr uint8_t COMPONENT_STATE_SETUP = 0x01;
+inline constexpr uint8_t COMPONENT_STATE_LOOP = 0x02;
+inline constexpr uint8_t COMPONENT_STATE_FAILED = 0x03;
+inline constexpr uint8_t COMPONENT_STATE_LOOP_DONE = 0x04;
+// Status LED uses bits 3-4
+inline constexpr uint8_t STATUS_LED_MASK = 0x18;
+inline constexpr uint8_t STATUS_LED_OK = 0x00;
+inline constexpr uint8_t STATUS_LED_WARNING = 0x08;
+inline constexpr uint8_t STATUS_LED_ERROR = 0x10;
 
 // Remove before 2026.8.0
 enum class RetryResult { DONE, RETRY };