diff --git a/mcrouter/ProxyRequestLogger-inl.h b/mcrouter/ProxyRequestLogger-inl.h
index 51a708da4..22e44a1a9 100644
--- a/mcrouter/ProxyRequestLogger-inl.h
+++ b/mcrouter/ProxyRequestLogger-inl.h
@@ -34,6 +34,10 @@ void ProxyRequestLogger<RouterInfo>::log(
   const auto durationUs = loggerContext.endTimeUs - loggerContext.startTimeUs;
   proxy_.stats().durationUs().insertSample(durationUs);
   logDurationByRequestType<Request>(durationUs);
+
+  proxy_.stats().processingTimeUs().insertSample(
+      loggerContext.startTimeUs - loggerCreatedTimeUs_ -
+      loggerContext.networkTransportTimeUs);
 }
 
 template <class RouterInfo>
diff --git a/mcrouter/ProxyRequestLogger.h b/mcrouter/ProxyRequestLogger.h
index fd74574f6..c819fe6a9 100644
--- a/mcrouter/ProxyRequestLogger.h
+++ b/mcrouter/ProxyRequestLogger.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include "mcrouter/McrouterFiberContext.h"
+#include "mcrouter/config.h"
 #include "mcrouter/lib/carbon/Result.h"
 #include "mcrouter/lib/carbon/RoutingGroups.h"
 
@@ -22,7 +23,8 @@ struct RequestLoggerContext;
 template <class RouterInfo>
 class ProxyRequestLogger {
  public:
-  explicit ProxyRequestLogger(Proxy<RouterInfo>& proxy) : proxy_(proxy) {}
+  explicit ProxyRequestLogger(Proxy<RouterInfo>& proxy)
+      : proxy_(proxy), loggerCreatedTimeUs_(nowUs()) {}
 
   template <class Request>
   void log(const RequestLoggerContext& loggerContext);
@@ -45,6 +47,8 @@ class ProxyRequestLogger {
   void logDurationByRequestType(
       uint64_t durationUs,
       carbon::OtherThanT<Request, carbon::GetLike<>, carbon::UpdateLike<>> = 0);
+
+  int64_t loggerCreatedTimeUs_ = 0;
 };
 } // namespace mcrouter
 } // namespace memcache
diff --git a/mcrouter/ProxyStats.h b/mcrouter/ProxyStats.h
index c867a2695..4e35b9a36 100644
--- a/mcrouter/ProxyStats.h
+++ b/mcrouter/ProxyStats.h
@@ -68,6 +68,10 @@ class ProxyStats {
     return axonProxyDurationUs_;
   }
 
+  ExponentialSmoothData<64>& processingTimeUs() {
+    return processingTimeUs_;
+  }
+
   size_t numBinsUsed() const {
     return numBinsUsed_;
   }
@@ -208,6 +212,9 @@ class ProxyStats {
   // Time spent for axonlog writing
   ExponentialSmoothData<64> axonProxyDurationUs_;
 
+  // Time spent in mcrouter, excluding time spent over network.
+  ExponentialSmoothData<64> processingTimeUs_;
+
   // we are wasting some memory here to get faster mapping from stat name to
   // statsBin_[] and statsNumWithinWindow_[] entry. i.e., the statsBin_[]
   // and statsNumWithinWindow_[] entry for non-rate stat are not in use.
diff --git a/mcrouter/stat_list.h b/mcrouter/stat_list.h
index 64fc23c96..a94158a4a 100644
--- a/mcrouter/stat_list.h
+++ b/mcrouter/stat_list.h
@@ -325,6 +325,8 @@ STAT(client_queue_notify_period, stat_double, 0, .dbl = 0.0)
 STAT(asynclog_duration_us, stat_double, 0, .dbl = 0.0)
 // avg time spent appending to axon proxy
 STAT(axon_proxy_duration_us, stat_double, 0, .dbl = 0.0)
+// Time spent in mcrouter, excluding time spent over network.
+STAT(processing_time_us, stat_double, 0, .dbl = 0.0)
 #undef GROUP
 #define GROUP ods_stats | basic_stats | max_stats
 STUI(destination_max_pending_reqs, 0, 1)
diff --git a/mcrouter/stats.cpp b/mcrouter/stats.cpp
index 15e670961..4fb5fe357 100644
--- a/mcrouter/stats.cpp
+++ b/mcrouter/stats.cpp
@@ -583,6 +583,8 @@ void prepare_stats(CarbonRouterInstanceBase& router, stat_t* stats) {
         std::min(
             i ? stat_get_uint64(stats, proxy_queue_full_stat) : 0,
             static_cast<uint64_t>(pr->messageQueueFull() ? 1 : 0)));
+    stat_incr(
+        stats, processing_time_us_stat, pr->stats().processingTimeUs().value());
   }
 
   if (router.opts().num_proxies > 0) {
@@ -610,6 +612,8 @@ void prepare_stats(CarbonRouterInstanceBase& router, stat_t* stats) {
         stats, asynclog_duration_us_stat, router.opts().num_proxies);
     stat_div_internal(
         stats, axon_proxy_duration_us_stat, router.opts().num_proxies);
+    stat_div_internal(
+        stats, processing_time_us_stat, router.opts().num_proxies);
   }
 
   for (int i = 0; i < num_stats; i++) {
diff --git a/mcrouter/test/test_mcrouter_processing_time.py b/mcrouter/test/test_mcrouter_processing_time.py
index 8cbf664ae..e93383f87 100644
--- a/mcrouter/test/test_mcrouter_processing_time.py
+++ b/mcrouter/test/test_mcrouter_processing_time.py
@@ -37,11 +37,12 @@ def tearDown(self) -> None:
     def test_mcrouter_processing_time(self) -> None:
         self.assertEqual(self.mcrouter.leaseGet("key1"), {"value": "", "token": 0})
         time.sleep(0.5)
+        stat = self.mcrouter.stats()
         self.mcrouter.terminate()
         scuba_samples = open(self.debug_file, "r").readlines()
         # One error sampler plus three main sampler.
         self.assertEqual(len(scuba_samples), 4)
-
+        self.assertGreaterEqual(stat["processing_time_us"], 200000)
         for sample in scuba_samples:
             sample_parsed = json.loads(sample)
             self.assertEqual(