diff --git a/slurm-eff-tool.py b/slurm-eff-tool.py
index d62b88c..b340f17 100755
--- a/slurm-eff-tool.py
+++ b/slurm-eff-tool.py
@@ -831,7 +831,11 @@ def make_single_row(rec: JobRecord, dflt_mpcpu: float) -> OutputRow:
 
     waste_cpu = None
     if rec.cpu_eff is not None:
-        waste_cpu = walltime * (100-rec.cpu_eff) * rec.cpus
+        # We count failed jobs as wasted CPU!
+        if rec.state != state_mappings['COMPLETED']:
+            waste_cpu = walltime * rec.cpus
+        else:
+            waste_cpu = walltime * (100-rec.cpu_eff)/100 * rec.cpus
 
     jobid = rec.jobidraw
     if jobid == "":
@@ -897,7 +901,11 @@ def make_aggregate_row(records: list[JobRecord], username: str,
 
     waste_cpu=None
     if cpu_efficiency is not None and walltime is not None:
-        waste_cpu = count * walltime * (100-cpu_efficiency) * first.cpus
+        # We count failed jobs as wasted CPU!
+        if first.state != state_mappings['COMPLETED']:
+            waste_cpu = count * walltime * first.cpus
+        else:
+            waste_cpu = count * walltime * (100-cpu_efficiency)/100 * first.cpus
 
     return OutputRow(
         username=username,