Payment for government contracts

Update to payment terms

The NT Government has updated their payment policy for works, goods and services starting 1 July 2019.

All invoices under $1 million will now be paid within 20 days of receiving the invoice.

Invoices over $1 million will be paid within 30 days of receiving the invoice.

You will need to submit an invoice to get paid for goods and services provided to government.

You can submit your invoice online, by email or mail.


InvoiceNTG is an online system that allows businesses to submit invoices to a government agency.

InvoiceNTG also lets you do the following:

  • track the progress of invoice payments
  • get email remittance advice and payment reports
  • get SMS and email alerts on invoice payments
  • create template invoices for lodging online
  • run reports on invoice and payment history.

You can't use it for invoices relating to:

  • Power and Water Corporation
  • Jacana Energy
  • Territory Generation
  • construction and maintenance of infrastructure.

Go to InvoiceNTG.

If your invoice relates to infrastructure work

If your invoice relates to construction and maintenance of infrastructure, you will need to submit your invoice to the relevant agency.

The invoice will go through the ASNEX system and payment will be processed through the Government Accounting System (GAS).

You will get a remittance report when payment is complete.

For information about contract management or payment, contact the relevant agency:

Department of Infrastructure, Planning and Logistics - use the email address provided in the tender documents.

Department of Housing and Community Development -

If you want to email your invoice to a government agency, contact accounts payable at

If you are submitting your invoice by mail, make sure you use the correct billing address.

Your invoice must have the correct organisation billing details.

You can find the billing details for different agencies below.

Government agency billing information PDF (138.0 KB)
Government agency billing information DOCX (46.6 KB).

All invoices under $1 million will be paid within 20 days of receiving the invoice, unless there is a dispute over the account.

All invoices over $1 million will be paid within 30 days of receiving the invoice, unless there is a dispute over the account.

You can seek penalty interest payments from government if these payment terms aren't met.

Late payments

The invoice payment period applies from the date of receipt of the invoice where:

  • the invoice is correct and not disputed
  • works, goods or services have been received.

Penalty interest rates

The penalty interest rate is set on an annual basis and paid at the 90 day bank bill rate as at 1 June each year.

For 2020 to 2021, the rate has been set at 0.093%.

Penalty interest rates do not apply if interest penalty payments are received late.

Penalty interest claims are not subject to GST.

How to calculate penalty interest payment

Interest is calculated from the 21st or 31st day, depending on the invoice amount, to the date the late payment was made by the government.


If an invoice of more than $1 million is received on 15 April and payment is made on 31 May, interest is payable is for the period 15 May to 31 May (both days inclusive) or 17 days.

Invoice received

15 April

30 day payment due

14 May

Payment made

31 May

Penalty period begins

15 May

Penalty period ends

31 May

Penalty interest due

17 days

How to claim penalty interest payment

You will need to submit a tax invoice to claim the penalty interest within 90 days of the late payment being made.

You must submit your invoice to the government organisation that received the original invoice.

Invoice details must include the following details:

  • date the NT Government organisation received the original invoice
  • date of payment
  • copy of the original invoice
  • period for which the supplier considers interest is due
  • amount of penalty interest sought.


For payment queries including calculating interest, contact accounts payable at

Last updated: 03 June 2020

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