Fill Out Ending a Child Support Assessment (CS1671) Online
Ending a child support assessment form
Services Australia
Asks Services Australia to end a child support assessment when eligibility or circumstances change.
Reviewed July 2026
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Form CS1671 is the Services Australia form for ending a child support assessment. It is used to ask the agency to stop an existing assessment, most commonly when the person entitled to receive child support elects to end it, or when eligibility or family circumstances have changed in a way that means the assessment should no longer continue.
You can fill out CS1671 directly in the Universal PDF editor. Enter your case details and the date you want the assessment to end, then download the completed PDF to sign and lodge. Because ending an assessment can interact with family assistance, it is worth talking to Services Australia before lodging so you understand the effect in your situation.
What is Form CS1671 used for
The form records a formal election or request to end a child support assessment for one or more children in a case. Once processed, Services Australia stops assessing ongoing child support from the chosen date, and any collection arrangements tied to the assessment wind up in line with the decision.
Ending an assessment is different from changing it. If the issue is the amount rather than whether child support should exist at all, the change of assessment process on form CS1970, or updating care and income details, may be the more appropriate route.
Who uses Form CS1671
The election to end an assessment is generally made by the person entitled to receive child support for the child. It can be relevant where parents reconcile, where private arrangements make the assessment unnecessary, or where the carer simply no longer wants the assessment to continue.
Circumstances can also end an assessment as a matter of law, for example when a child reaches the age where child support stops or care arrangements change fundamentally. In those cases the form, or a call to Services Australia, ensures the agency's records reflect what has happened.
How to fill out Form CS1671
The form is short compared with a claim, but accuracy matters because it ends an ongoing entitlement:
- Enter your personal details and your child support case reference so the right assessment is identified.
- Identify each child the request covers, since an assessment can be ended for some children and not others.
- State the date you want the assessment to end.
- Give the reason for ending the assessment where the form asks for it.
- Sign and date the declaration before lodging.
How to submit it
Lodge the completed form with Services Australia, generally by uploading it through your Child Support online account via myGov or posting it to the address in the form's instructions. The agency will confirm when the assessment has ended and what it means for any outstanding amounts.
Amounts that were already due before the end date do not simply disappear, so check how arrears will be handled. Services Australia can explain the position before you lodge.
Frequently asked questions
Generally the person entitled to receive child support makes the election. Services Australia can confirm who can lodge the request in your case and from what date an assessment can end.
It can. Child support and family assistance are linked, so ending an assessment may change how other payments are worked out. Contact Services Australia before lodging so you know the effect in your circumstances.
Ending an assessment operates from the chosen date. Amounts that fell due beforehand are handled separately, so ask Services Australia how any arrears in your case will be treated.
Ending an assessment does not usually prevent a new application in the future if you are eligible at that time. A new application starts a fresh assessment rather than reviving the old one.
No. To change how much is assessed, update your care and income details or apply for a change of assessment in special circumstances using form CS1970. CS1671 is for ending an assessment altogether.
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