diff --git a/scripts/netbox-contract.py b/scripts/netbox-contract.py
new file mode 100644
index 0000000..e80ebaa
--- /dev/null
+++ b/scripts/netbox-contract.py
@@ -0,0 +1,240 @@
+from datetime import date
+from decimal import *
+from django.core.exceptions import ObjectDoesNotExist
+from django.db.models import Count
+from extras.scripts import *
+from netbox_contract.models import Contract, Invoice, InvoiceLine, AccountingDimension, StatusChoices
+
+name = "Contracts related scripts"
+
+AMOUNT_PRECEDENCE = (
+    ('invoice', 'Invoice'),
+    ('dimensions', 'dimensions')
+)
+
+class update_expired_contract_status(Script):
+
+    class Meta:
+        name = "Update expired contracts status"
+        description = "Update the status of contract with end date prior to today's date"
+        commit_default = False
+
+    def run(self, data, commit):
+
+        username = self.request.user.username
+        self.log_info(f"Running as user {username}")
+
+        output = []
+
+        expired_contracts = Contract.objects.filter(end_date__lte = date.today()).filter(status = StatusChoices.STATUS_ACTIVE )
+        expired_contracts.update(status=StatusChoices.STATUS_CANCELED)
+
+        return '\n'.join(output)
+
+class create_invoice_template(Script):
+
+    class Meta:
+        name = "Create invoice templates"
+        description = "Convert the Accounting dimensions json field in Contracts to invoice template"
+        commit_default = False
+
+    def run(self, data, commit):
+
+        username = self.request.user.username
+        self.log_info(f"Running as user {username}")
+
+        output = []
+
+        self.log_info(f"Creating invoice templates from contract dimensions")
+
+        # Create invoice templates for each active template
+        for contract in Contract.objects.filter(status = StatusChoices.STATUS_ACTIVE ):
+            self.log_info(f"Processing contract {contract.name}")
+
+            # check if invoice template exist
+            invoice_template = Invoice.objects.filter(template=True, contracts=contract).first()
+
+            if invoice_template :
+                self.log_info(f"Template already exists for {contract.name}")
+                continue
+            
+            # if the invoice template does not exists create it
+            if contract.accounting_dimensions:
+                if contract.mrc is not None:
+                    amount = contract.mrc * contract.invoice_frequency
+                else:
+                    amount = contract.yrc / 12 * contract.invoice_frequency
+                invoice_template = Invoice(
+                    template = True,
+                    number = f"_invoice_template_{contract.name}",
+                    period_start = None,
+                    period_end = None,
+                    amount = amount,
+                    accounting_dimensions = contract.accounting_dimensions
+                )
+                invoice_template.save()
+                invoice_template.contracts.add(contract)
+                self.log_info(f"Template {invoice_template.number} created for {contract.name}")
+
+        return '\n'.join(output)
+
+class create_invoice_lines(Script):
+
+    class Meta:
+        name = "Create invoice lines"
+        description = "Convert the Accounting dimensions json field in invoices to invoice lines"
+        commit_default = False
+
+    ignore = StringVar(
+        label="Ignore",
+        description="Accounting dimensions to be ignored. List of string separated by comma.",
+        required=False,
+        regex=r"^\w+(,\w+)*$"
+    )
+
+    amount_precedence = ChoiceVar(
+        label="Amount precedence",
+        description="Select if the dimension amount or the invoice amount take precedence,",
+        choices = AMOUNT_PRECEDENCE,
+        required=False
+    )
+
+    line_amount_key = StringVar(
+        label="Line amount key",
+        description="Key name for line amount in the accounting dimension json with multiple lines",
+        required=True,
+    )
+
+    def run(self, data, commit):
+
+        username = self.request.user.username
+        self.log_info(f"Running as user {username}")
+
+        output = []
+
+        line_amount_key = data['line_amount_key']
+
+        exclude = [line_amount_key]
+        if data['ignore']:
+            exclude.extend(data['ignore'].split(','))
+
+        self.log_info(f"Creating invoice lines from invoices dimensions")
+        self.log_info(f"Ignoring dimensions {exclude}")
+        self.log_info(f"Line amount key {line_amount_key}")
+
+        # import existing dimensions
+        dimensions={}
+        dims = AccountingDimension.objects.all()
+        if dims.exists():
+            for dim in dims:
+                dimensions[f"{dim.name}_{dim.value}"] = dim
+
+        # Get all invoices without invoice lines
+        invoices = Invoice.objects.annotate(numberoflines=Count("invoicelines"))
+
+        # Create invoice lines for each invoice
+        for invoice in invoices:
+            if invoice.numberoflines > 0:
+                self.log_info(f"Invoice skipped {invoice.number}. Exiting lines")
+                continue
+
+            self.log_info(f"Processing Invoice {invoice.number}")
+            
+            total_invoice_lines_amount = 0
+
+            # Create invoice template lines
+            # Check if several lines have to be created
+            if isinstance(invoice.accounting_dimensions, list):
+                # if the accounting dimensions is a list we assume that we have an "amount" 
+                lines = invoice.accounting_dimensions
+            else:
+                lines = [invoice.accounting_dimensions]
+
+            single_line_invoice = len(lines) == 1
+
+            for line in lines:
+                if single_line_invoice and data['amount_precedence']=='invoice':
+                    amount = invoice.amount
+                else: 
+                    # Retrieving with get reduce the repetition of code
+                    amount = line.get(line_amount_key)
+                    # Checking first the case "not exist" allow us to remove one indent level
+                    # NOTE: This works fine because None is not a valid value in this case.
+                    if not amount:
+                        self.log_warning(f"Multiple lines or dimensions precedence and no amount for line")
+                        continue
+                    # The try-except part is the same and can be extracted
+                    if isinstance(amount , str): 
+                        amount = amount.replace(",",".").replace(" ","")
+                    try:
+                        amount = Decimal(line[line_amount_key])
+                    except:
+                        self.log_warning(f"Wrong number format {line[line_amount_key]}")
+                        output.append(f"{invoice.number}: dimensions amount format to be updated")
+
+                invoice_line = InvoiceLine(
+                    invoice = invoice,
+                    currency = invoice.currency,
+                    amount = amount,
+                )
+                invoice_line.save()
+                self.log_info(f"Invoice line {invoice_line.id} created for {invoice.number}")
+                total_invoice_lines_amount = total_invoice_lines_amount + amount
+
+                # create and add dimensions
+                for key, value in line.items():
+                    if key not in exclude and value is not None:
+                        dimkey = f"{key}_{value}"
+                        if dimkey not in dimensions.keys():
+                            dimension = AccountingDimension(
+                                name = key,
+                                value = str(value)
+                            )
+                            dimension.save()
+                            dimensions[dimkey] = dimension
+                        invoice_line.accounting_dimensions.add(dimensions[dimkey])
+                self.log_info(f"Accounting dimensions added to Invoice line {invoice_line.id}")
+
+
+            if total_invoice_lines_amount != invoice.amount:
+                self.log_warning(f"The total of invoice lines and invoice amount do not match.")
+                output.append(f"{invoice.number}: Sum of invoice lines amount to be checked")
+
+        return '\n'.join(output)
+    
+class bulk_replace_accounting_dimension(Script):
+
+    class Meta:
+        name = "Replace accounting dimension"
+        description = "Replace one accounting dimension by another one for all lines"
+        commit_default = False
+
+    current = ObjectVar(
+        label="Current dimension",
+        description="The accounting dimension to be replaced.",
+        model=AccountingDimension
+    )
+
+    new = ObjectVar(
+        label="New accounting dimension",
+        description="The new accounting dimension",
+        model=AccountingDimension
+    )
+
+    def run(self, data, commit):
+
+        username = self.request.user.username
+        self.log_info(f"Running as user {username}")
+
+        output = []
+
+        current_dimension = data["current"]
+        new_dimension = data["new"]
+
+        lines = InvoiceLine.objects.filter(accounting_dimensions=current_dimension)
+        for line in lines:
+            line.accounting_dimensions.remove(current_dimension)
+            line.accounting_dimensions.add(new_dimension)
+            self.log_info(f"invoice {line.invoice.number} updated")
+
+        return '\n'.join(output)