diff --git a/src/Cmd.cpp b/src/Cmd.cpp
index 6414a6593..86c7d00d3 100644
--- a/src/Cmd.cpp
+++ b/src/Cmd.cpp
@@ -135,6 +135,7 @@ void Cmd::load ()
     commands.push_back ("_config");
     commands.push_back ("_version");
     commands.push_back ("_merge");
+    commands.push_back ("_urgency");
     commands.push_back ("export.csv");
     commands.push_back ("export.ical");
     commands.push_back ("export.yaml");
@@ -232,6 +233,7 @@ bool Cmd::isReadOnlyCommand ()
       command == "_ids"                                                      ||
       command == "_config"                                                   ||
       command == "_version"                                                  ||
+      command == "_urgency"                                                  ||
       command == "export.csv"                                                ||
       command == "export.ical"                                               ||
       command == "export.yaml"                                               ||
diff --git a/src/Config.cpp b/src/Config.cpp
index 3ad0ef921..70f52d238 100644
--- a/src/Config.cpp
+++ b/src/Config.cpp
@@ -101,6 +101,21 @@ std::string Config::defaults =
   "journal.time.start.annotation=Started task    # Annotation description for the start journal entry\n"
   "journal.time.stop.annotation=Stopped task     # Annotation description for the stop  journal entry\n"
   "\n"
+  "# Urgency Coefficients\n"
+  "urgency.next.coefficient=10.0                 # Urgency coefficients for 'next' special tag\n"
+  "urgency.blocking.coefficient=9.0              # Urgency coefficients for blocking tasks\n"
+  "urgency.blocked.coefficient=8.0               # Urgency coefficients for blocked tasks\n"
+  "urgency.due.coefficient=7.0                   # Urgency coefficients for due dates\n"
+  "urgency.priority.coefficient=6.0              # Urgency coefficients for priorities\n"
+  "urgency.waiting.coefficient=5.0               # Urgency coefficients for waiting status\n"
+  "urgency.active.coefficient=4.0                # Urgency coefficients for active tasks\n"
+  "urgency.project.coefficient=3.0               # Urgency coefficients for projects\n"
+  "urgency.tags.coefficient=2.0                  # Urgency coefficients for tags\n"
+  "urgency.annotations.coefficient=1.0           # Urgency coefficients for annotations\n"
+  "\n"
+  "#urgency.user.project.foo.coefficient=5.0     # Urgency coefficients for 'foo' project\n"
+  "#urgency.user.tag.foo.coefficient=5.0         # Urgency coefficients for 'foo' tag\n"
+  "\n"
   "# Color controls.\n"
   "color=on                                      # Enable color\n"
 #ifdef LINUX
diff --git a/src/Context.cpp b/src/Context.cpp
index fecf8fed7..a32d47701 100644
--- a/src/Context.cpp
+++ b/src/Context.cpp
@@ -249,6 +249,7 @@ int Context::dispatch (std::string &out)
   else if (cmd.command == "_ids")             { rc = handleCompletionIDs         (out); }
   else if (cmd.command == "_config")          { rc = handleCompletionConfig      (out); }
   else if (cmd.command == "_version")         { rc = handleCompletionVersion     (out); }
+  else if (cmd.command == "_urgency")         { rc = handleUrgency               (out); }
   else if (cmd.command == "" &&
            sequence.size ())                  { rc = handleModify                (out); }
 
diff --git a/src/Task.cpp b/src/Task.cpp
index ccbbcd6c4..307352301 100644
--- a/src/Task.cpp
+++ b/src/Task.cpp
@@ -34,6 +34,7 @@
 #include "Task.h"
 #include "text.h"
 #include "util.h"
+#include "main.h"
 
 extern Context context;
 
@@ -738,3 +739,171 @@ int Task::determineVersion (const std::string& line)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// Urgency is defined as a polynomial, the value of which is calculated in this
+// function, according to:
+//
+//   U = A.t  + B.t  + C.t  ...
+//          a      b      c
+//
+//   U       = urgency
+//   A       = coefficient for term a
+//   t sub a = numeric scale from 0 -> 1, with 1 being the highest
+//             urgency, derived from one task attribute and mapped
+//             to the numeric scale
+//
+// See rfc31-urgency.txt for full details.
+//
+float Task::urgency ()
+{
+  float urgency = 0.0;
+
+  // urgency.priority.coefficient
+  float coefficient = (float) context.config.getReal ("urgency.priority.coefficient");
+  float term;
+
+  std::string value = get ("priority");
+       if (value == "H") term = 1.0;
+  else if (value == "M") term = 0.65;
+  else if (value == "L") term = 0.3;
+  else                   term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.project.coefficient
+  coefficient = (float) context.config.getReal ("urgency.project.coefficient");
+
+  value = get ("project");
+  if (value != "") term = 1.0;
+  else             term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.active.coefficient
+  coefficient = (float) context.config.getReal ("urgency.active.coefficient");
+
+  value = get ("start");
+  if (value != "") term = 1.0;
+  else             term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.waiting.coefficient
+  coefficient = (float) context.config.getReal ("urgency.waiting.coefficient");
+
+  value = get ("status");
+       if (value == "pending") term = 1.0;
+  else if (value == "waiting") term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.blocked.coefficient
+  coefficient = (float) context.config.getReal ("urgency.blocked.coefficient");
+
+  value = get ("depends");
+  if (value != "") term = 0.0;
+  else             term = 1.0;
+
+  urgency += term * coefficient;
+
+  // urgency.annotations.coefficient
+  coefficient = (float) context.config.getReal ("urgency.annotations.coefficient");
+
+  std::vector <Att> annos;
+  getAnnotations (annos);
+       if (annos.size () >= 3) term = 1.0;
+  else if (annos.size () == 2) term = 0.9;
+  else if (annos.size () == 1) term = 0.8;
+  else                         term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.tags.coefficient
+  coefficient = (float) context.config.getReal ("urgency.tags.coefficient");
+
+  int count = getTagCount ();
+       if (count >= 3) term = 1.0;
+  else if (count == 2) term = 0.9;
+  else if (count == 1) term = 0.8;
+  else                 term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.next.coefficient
+  coefficient = (float) context.config.getReal ("urgency.next.coefficient");
+
+  if (hasTag ("next")) term = 1.0;
+  else                 term = 0.0;
+
+  urgency += term * coefficient;
+
+  // urgency.due.coefficient
+  //   days overdue, capped at 7     ->  0.8 - 1.0
+  //   due today                     ->  0.7
+  //   days until due, capped at 14  ->  0.4 - 0.6
+  //   has due date                  ->  0.3
+  //   no due date                   ->  0.0
+  coefficient = (float) context.config.getReal ("urgency.due.coefficient");
+  if (has ("due"))
+  {
+    Date now;
+    Date due (get ("due"));
+    int days_overdue = (now - due) / 86400;
+
+         if (days_overdue > 7)   term = 1.0;
+    else if (days_overdue > 0)   term = (0.2 * days_overdue / 7.0) + 0.8;
+    else if (due.sameDay (now))  term = 0.7;
+    else if (days_overdue < -14) term = 0.4;
+    else if (days_overdue < 0)   term = (0.2 * days_overdue / 14.0) + 0.6;
+    else                         term = 0.3;
+  }
+  else
+    term = 0.0;
+
+  urgency += term * coefficient;
+
+  // Tag- and project-specific coefficients.
+  std::vector <std::string> all;
+  context.config.all (all);
+
+  foreach (var, all)
+  {
+    if (var->substr (0, 13) == "urgency.user.")
+    {
+      // urgency.user.project.<project>.coefficient
+      std::string::size_type end = std::string::npos;
+      if (var->substr (13, 8) == "project." &&
+          (end = var->find (".coefficient")) != std::string::npos)
+      {
+        std::string project = var->substr (21, end - 21);
+        coefficient = (float) context.config.getReal (*var);
+
+        if (get ("project").find (project) == 0)
+          urgency += coefficient;
+      }
+
+    // urgency.user.tag.<tag>.coefficient
+      if (var->substr (13, 4) == "tag." &&
+          (end = var->find (".coefficient")) != std::string::npos)
+      {
+        std::string tag = var->substr (17, end - 17);
+        coefficient = (float) context.config.getReal (*var);
+
+        if (hasTag (tag))
+          urgency += coefficient;
+      }
+    }
+  }
+
+  // urgency.blocking.coefficient
+  coefficient = (float) context.config.getReal ("urgency.blocking.coefficient");
+
+  if (dependencyIsBlocking (*this)) term = 1.0;
+  else                              term = 0.0;
+
+  urgency += term * coefficient;
+
+  // Return the sum of all terms.
+  return urgency;
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/src/Task.h b/src/Task.h
index 4ff53405e..40b06c391 100644
--- a/src/Task.h
+++ b/src/Task.h
@@ -81,6 +81,8 @@ public:
 
   void validate () const;
 
+  float urgency ();
+
 private:
   int determineVersion (const std::string&);
   void legacyParse (const std::string&);
diff --git a/src/command.cpp b/src/command.cpp
index a8d99d592..a04902eed 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -515,6 +515,36 @@ int handleCompletionVersion (std::string &outs)
   return 0;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Temporary command to display urgency for a task.
+int handleUrgency (std::string &outs)
+{
+  // Get all the tasks.
+  std::vector <Task> tasks;
+  context.tdb.lock (context.config.getBoolean ("locking"));
+  handleRecurrence ();
+  context.tdb.loadPending (tasks, context.filter);
+  context.tdb.commit ();
+  context.tdb.unlock ();
+
+  // Filter sequence.
+  context.filter.applySequence (tasks, context.sequence);
+
+  // Find the task(s).
+  std::stringstream out;
+  foreach (task, tasks)
+  {
+    out << "task "
+        << task->id
+        << " urgency "
+        << task->urgency ()
+        << "\n";
+  }
+
+  outs = out.str ();
+  return 0;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 int handleCompletionIDs (std::string &outs)
 {
@@ -715,7 +745,12 @@ int handleShow (std::string &outs)
       "import.synonym.status import.synonym.tags import.synonym.entry "
       "import.synonym.start import.synonym.due import.synonym.recur "
       "import.synonym.end import.synonym.project import.synonym.priority "
-      "import.synonym.fg import.synonym.bg import.synonym.description ";
+      "import.synonym.fg import.synonym.bg import.synonym.description "
+
+      "urgency.next.coefficient urgency.blocking.coefficient urgency.blocked.coefficient "
+      "urgency.due.coefficient urgency.priority.coefficient urgency.waiting.coefficient "
+      "urgency.active.coefficient urgency.project.coefficient urgency.tags.coefficient "
+      "urgency.annotations.coefficient ";
 
     // This configuration variable is supported, but not documented.  It exists
     // so that unit tests can force color to be on even when the output from task
@@ -732,13 +767,15 @@ int handleShow (std::string &outs)
       {
         // These are special configuration variables, because their name is
         // dynamic.
-        if (i->substr (0, 14) != "color.keyword." &&
-            i->substr (0, 14) != "color.project." &&
-            i->substr (0, 10) != "color.tag."     &&
-            i->substr (0,  8) != "holiday."       &&
-            i->substr (0,  7) != "report."        &&
-            i->substr (0,  6) != "alias."         &&
-            i->substr (0,  5) != "hook.")
+        if (i->substr (0, 14) != "color.keyword."        &&
+            i->substr (0, 14) != "color.project."        &&
+            i->substr (0, 10) != "color.tag."            &&
+            i->substr (0,  8) != "holiday."              &&
+            i->substr (0,  7) != "report."               &&
+            i->substr (0,  6) != "alias."                &&
+            i->substr (0,  5) != "hook."                 &&
+            i->substr (0, 21) != "urgency.user.project." &&
+            i->substr (0, 17) != "urgency.user.tag.")
         {
           unrecognized.push_back (*i);
         }
diff --git a/src/main.h b/src/main.h
index b594afdb5..338390be1 100644
--- a/src/main.h
+++ b/src/main.h
@@ -69,6 +69,7 @@ int handleCompletionCommands (std::string &);
 int handleCompletionIDs (std::string &);
 int handleCompletionConfig (std::string &);
 int handleCompletionVersion (std::string &);
+int handleUrgency (std::string &);
 int handleVersion (std::string &);
 int handleConfig (std::string &);
 int handleShow (std::string &);
diff --git a/src/tests/t.t.cpp b/src/tests/t.t.cpp
index 497f54c0f..a1dd01dba 100644
--- a/src/tests/t.t.cpp
+++ b/src/tests/t.t.cpp
@@ -153,6 +153,8 @@ TODO Task::removeDependency
 TODO Task::getDependencies
 TODO Task::getDependencies
 
+TODO Task::urgency
+
 */
 
   // Task::operator==