diff --git a/src/coreclr/inc/clrconfigvalues.h b/src/coreclr/inc/clrconfigvalues.h
index 7832490029ce3..7e524b6e40f66 100644
--- a/src/coreclr/inc/clrconfigvalues.h
+++ b/src/coreclr/inc/clrconfigvalues.h
@@ -617,7 +617,7 @@ CONFIG_DWORD_INFO(INTERNAL_OSR_HighId, W("OSR_HighId"), 10000000, "High end of e
 RETAIL_CONFIG_STRING_INFO(INTERNAL_PGODataPath, W("PGODataPath"), "Read/Write PGO data from/to the indicated file.")
 RETAIL_CONFIG_DWORD_INFO(INTERNAL_ReadPGOData, W("ReadPGOData"), 0, "Read PGO data")
 RETAIL_CONFIG_DWORD_INFO(INTERNAL_WritePGOData, W("WritePGOData"), 0, "Write PGO data")
-RETAIL_CONFIG_DWORD_INFO(INTERNAL_TieredPGO, W("TieredPGO"), 0, "Instrument Tier0 code and make counts available to Tier1")
+RETAIL_CONFIG_DWORD_INFO(EXTERNAL_TieredPGO, W("TieredPGO"), 0, "Instrument Tier0 code and make counts available to Tier1")
 #endif
 
 ///
diff --git a/src/coreclr/vm/eeconfig.cpp b/src/coreclr/vm/eeconfig.cpp
index 3b4ad3176e6da..ce8e2691940bc 100644
--- a/src/coreclr/vm/eeconfig.cpp
+++ b/src/coreclr/vm/eeconfig.cpp
@@ -237,6 +237,10 @@ HRESULT EEConfig::Init()
     tieredCompilation_DeleteCallCountingStubsAfter = 0;
 #endif
 
+#if defined(FEATURE_PGO)
+    fTieredPGO = false;
+#endif
+
 #if defined(FEATURE_ON_STACK_REPLACEMENT)
     dwOSR_HitLimit = 10;
     dwOSR_CounterBump = 5000;
@@ -769,6 +773,10 @@ HRESULT EEConfig::sync()
     }
 #endif
 
+#if defined(FEATURE_PGO)
+    fTieredPGO = Configuration::GetKnobBooleanValue(W("System.Runtime.TieredPGO"), CLRConfig::EXTERNAL_TieredPGO);
+#endif
+
 #if defined(FEATURE_ON_STACK_REPLACEMENT)
     dwOSR_HitLimit = CLRConfig::GetConfigValue(CLRConfig::INTERNAL_OSR_HitLimit);
     dwOSR_CounterBump = CLRConfig::GetConfigValue(CLRConfig::INTERNAL_OSR_CounterBump);
diff --git a/src/coreclr/vm/eeconfig.h b/src/coreclr/vm/eeconfig.h
index 78b67d51f9196..0cb79d7f85fdc 100644
--- a/src/coreclr/vm/eeconfig.h
+++ b/src/coreclr/vm/eeconfig.h
@@ -90,6 +90,10 @@ class EEConfig
     DWORD         TieredCompilation_DeleteCallCountingStubsAfter() const { LIMITED_METHOD_CONTRACT; return tieredCompilation_DeleteCallCountingStubsAfter; }
 #endif
 
+#if defined(FEATURE_PGO)
+    bool          TieredPGO(void) const { LIMITED_METHOD_CONTRACT;  return fTieredPGO; }
+#endif
+
 #if defined(FEATURE_ON_STACK_REPLACEMENT)
     // OSR Config
     DWORD         OSR_CounterBump() const { LIMITED_METHOD_CONTRACT; return dwOSR_CounterBump; }
@@ -648,6 +652,10 @@ class EEConfig
     DWORD tieredCompilation_DeleteCallCountingStubsAfter;
 #endif
 
+#if defined(FEATURE_PGO)
+    bool fTieredPGO;
+#endif
+
 #if defined(FEATURE_ON_STACK_REPLACEMENT)
     DWORD dwOSR_HitLimit;
     DWORD dwOSR_CounterBump;
diff --git a/src/coreclr/vm/jitinterface.cpp b/src/coreclr/vm/jitinterface.cpp
index d30b46adbbfec..5bc01735c0a08 100644
--- a/src/coreclr/vm/jitinterface.cpp
+++ b/src/coreclr/vm/jitinterface.cpp
@@ -12640,7 +12640,7 @@ CORJIT_FLAGS GetCompileFlags(MethodDesc * ftn, CORJIT_FLAGS flags, CORINFO_METHO
     {
         flags.Set(CORJIT_FLAGS::CORJIT_FLAG_BBINSTR);
     }
-    else if ((CLRConfig::GetConfigValue(CLRConfig::INTERNAL_TieredPGO) > 0)
+    else if ((g_pConfig->TieredPGO())
         && (flags.IsSet(CORJIT_FLAGS::CORJIT_FLAG_TIER0) || flags.IsSet(CORJIT_FLAGS::CORJIT_FLAG_OSR)))
     {
         flags.Set(CORJIT_FLAGS::CORJIT_FLAG_BBINSTR);
@@ -12650,8 +12650,7 @@ CORJIT_FLAGS GetCompileFlags(MethodDesc * ftn, CORJIT_FLAGS flags, CORINFO_METHO
     {
         flags.Set(CORJIT_FLAGS::CORJIT_FLAG_BBOPT);
     }
-    else if ((CLRConfig::GetConfigValue(CLRConfig::INTERNAL_TieredPGO) > 0)
-        && flags.IsSet(CORJIT_FLAGS::CORJIT_FLAG_TIER1))
+    else if (g_pConfig->TieredPGO() && flags.IsSet(CORJIT_FLAGS::CORJIT_FLAG_TIER1))
     {
         flags.Set(CORJIT_FLAGS::CORJIT_FLAG_BBOPT);
     }
diff --git a/src/coreclr/vm/pgo.cpp b/src/coreclr/vm/pgo.cpp
index b6b1a155eb948..ad12d5c9d11d4 100644
--- a/src/coreclr/vm/pgo.cpp
+++ b/src/coreclr/vm/pgo.cpp
@@ -344,8 +344,8 @@ void PgoManager::ReadPgoData()
 {
     // Skip, if we're not reading, or we're writing profile data, or doing tiered pgo
     //
-    if ((CLRConfig::GetConfigValue(CLRConfig::INTERNAL_WritePGOData) > 0) ||
-        (CLRConfig::GetConfigValue(CLRConfig::INTERNAL_TieredPGO) > 0) ||
+    if (g_pConfig->TieredPGO() ||
+        (CLRConfig::GetConfigValue(CLRConfig::INTERNAL_WritePGOData) > 0) ||
         (CLRConfig::GetConfigValue(CLRConfig::INTERNAL_ReadPGOData) == 0))
     {
         return;