diff --git a/superx_budget/pyramid/overview.py b/superx_budget/pyramid/overview.py
index 51ea0bc..b77a6ed 100644
--- a/superx_budget/pyramid/overview.py
+++ b/superx_budget/pyramid/overview.py
@@ -26,6 +26,22 @@ bei Fragen bitte an Holgi wenden
 """
 
 
+def _map_from_form_data(request, prefix):
+    if not prefix.endswith("-"):
+        prefix = f"{prefix}-"
+    result = {}
+    for key, value in request.POST.items():
+        if key.startswith(prefix):
+            row_str = key.split("-")[-1]
+            row = int(row_str)
+            try:
+                value = float(value)
+            except ValueError:
+                value = 0
+            result[row] = value
+    return result
+
+
 @view_config(
     context=Root,
     request_method="GET",
@@ -112,22 +128,17 @@ def send_overview(context, request):
     recipients = tmp_recipients.splitlines()
     budget_template = request.POST.get("template")
     budget_file = request.budgets_dir / budget_template
-    expenses = {}
-    for key, value in request.POST.items():
-        if key.startswith("expense-"):
-            row_str = key.split("-")[-1]
-            row = int(row_str)
-            try:
-                value = float(value)
-            except ValueError:
-                value = 0
-            expenses[row] = value
+
+    budgets = _map_from_form_data(request, "budget-")
+    expenses = _map_from_form_data(request, "expense-")
+    available = {k: (v - expenses[k]) for k, v in budgets.items()}
 
     # sanity check
     if (
         not export_date
         or not recipients
         or not expenses
+        or not available
         or not budget_file.is_file()
     ):
         request.session.flash(
@@ -140,6 +151,9 @@ def send_overview(context, request):
     for row, value in expenses.items():
         cell = f"F{row}"
         sheet[cell] = value
+    for row, value in available.items():
+        cell = f"G{row}"
+        sheet[cell] = value
 
     budget_year = budget_file.stem.split("-")[-1]
     message = Message(
diff --git a/superx_budget/pyramid/templates/overview.jinja2 b/superx_budget/pyramid/templates/overview.jinja2
index b6fef14..a3dc499 100644
--- a/superx_budget/pyramid/templates/overview.jinja2
+++ b/superx_budget/pyramid/templates/overview.jinja2
@@ -31,7 +31,10 @@
                                 {{budget.budget_data.project_name}}
                             </td>
                             <td>{{budget.budget_data.project}}</td>
-                            <td class="text-right">{{ "{:,.2f}".format(budget.budget_data.budget) }} €</td>
+                            <td class="text-right">
+                                <input type="hidden" name="budget-{{budget.row}}" value="{{ '{:.2f}'.format(budget.budget_data.budget) }}">
+                                {{ "{:,.2f}".format(budget.budget_data.budget) }} €
+                            </td>
                             <td class="text-right">
                                 {% if budget.found %}
                                     <input type="hidden" name="expense-{{budget.row}}" value="{{budget.expenses}}">