diff --git a/firecloud/api.py b/firecloud/api.py
index 53d7bf9..6803188 100755
--- a/firecloud/api.py
+++ b/firecloud/api.py
@@ -1191,7 +1191,8 @@ def create_submission(wnamespace, workspace, cnamespace, config,
                       entity=None, etype=None, expression=None,
                       use_callcache=True, delete_intermediate_output_files=False,
                       use_reference_disks=False, memory_retry_multiplier=0,
-                      workflow_failure_mode="", user_comment=""):
+                      per_workflow_cost_cap=None, workflow_failure_mode="",
+                      user_comment=""):
     """Submit job in FireCloud workspace.
 
     Args:
@@ -1218,6 +1219,8 @@ def create_submission(wnamespace, workspace, cnamespace, config,
             Cromwell docs
             (https://cromwell.readthedocs.io/en/develop/cromwell_features/RetryWithMoreMemory)
             for more information
+        per_workflow_cost_cap (float): A cost threshold in USD to apply to individual
+            workflows. When the estimated cost is exceeded, the workflow is terminated.
         workflow_failure_mode (str): What happens after a task fails. Choose from
             ContinueWhilePossible and NoNewCalls. Defaults to NoNewCalls if not
             specified. See Cromwell docs
@@ -1254,6 +1257,9 @@ def create_submission(wnamespace, workspace, cnamespace, config,
     
     if memory_retry_multiplier:
         body['memoryRetryMultiplier'] = memory_retry_multiplier
+
+    if per_workflow_cost_cap:
+        body['perWorkflowCostCap'] = per_workflow_cost_cap
     
     if workflow_failure_mode:
         body['workflowFailureMode'] = workflow_failure_mode
diff --git a/firecloud/fiss.py b/firecloud/fiss.py
index 6b63a25..f185d0a 100644
--- a/firecloud/fiss.py
+++ b/firecloud/fiss.py
@@ -602,8 +602,8 @@ def config_start(args):
                                args.config, args.entity, args.entity_type,
                                args.expression, cache, 
                                args.delete_intermediates, args.ref_disks,
-                               args.mem_retry_multiplier, args.failure_mode,
-                               args.user_comment)
+                               args.mem_retry_multiplier, args.per_workflow_cost_cap,
+                               args.failure_mode, args.user_comment)
     fapi._check_response_code(r, 201)
     id = r.json()['submissionId']
 
@@ -2805,6 +2805,10 @@ def main(argv=None):
                       'this amount. See Cromwell docs ' +
                       '(https://cromwell.readthedocs.io/en/develop/cromwell_features/RetryWithMoreMemory)' +
                       ' for more information.')
+    subp.add_argument('-P', '--per_workflow_cost_cap', type=float,
+                      help='A cost threshold in USD to apply to individual ' +
+                      'workflows. When the estimated cost is exceeded, the ' +
+                      'workflow is terminated.')
     subp.add_argument('-f', '--failure_mode',
                       choices=['NoNewCalls', 'ContinueWhilePossible'],
                       help='What happens after a task fails. Defaults to ' +