You can claim Family Tax Benefit for previous years, but only one year back: your lump sum claim must reach Services Australia within 12 months of the end of the financial year you’re claiming for. So a claim for 2024–25 (which ended 30 June 2025) has to be lodged by 30 June 2026. After that date the money is almost always gone, and the narrow “special circumstances” extension will not rescue most late claimants. Everything else about a past-year claim — eligibility, income confirmation, immunisation, paperwork — sits underneath that one deadline.
The 12-Month Deadline
The rule sits in Section 10 of the A New Tax System (Family Assistance) (Administration) Act 1999: a claim for FTB for a past period is not effective if you lodge it after the end of the income year following the year you’re claiming for.1Federal Register of Legislation. A New Tax System (Family Assistance) (Administration) Act 1999 Services Australia describes this as a 12-month window running from 1 July after the relevant financial year to 30 June the year after that.2Services Australia. How to Manage Your Family Tax Benefit
One claim covers one income year. If you have missed FTB across several years, each year needs its own separate claim, and each one has to fall inside its own deadline. A claim lodged in July 2026 can pick up 2025–26, but not 2024–25, and certainly nothing earlier.
The same deadline applies if you already received fortnightly FTB during the year and simply need to confirm your income. Miss the 12-month window without confirming, and Services Australia treats the payments as unentitled from the start.
When an Extension Might Be Possible
Extensions beyond 12 months exist but are genuinely rare. Services Australia defines “special circumstances” as unusual, uncommon, or exceptional situations that were outside your control and significantly affected your ability to lodge on time.3Services Australia. Assessing Special Circumstances Extensions for Family Tax Benefit Not knowing about the deadline does not qualify. Neither does running out of time. Serious illness, a natural disaster, or a documented administrative error by the agency itself might. Even a successful application only pushes the deadline to 30 June of the year after the original deadline; there is no power to extend further.
There is also an absolute floor: extensions cannot be granted for any financial year before 2012–13, because no legislative provision existed to allow them.3Services Australia. Assessing Special Circumstances Extensions for Family Tax Benefit If you’re hoping to recover FTB from a decade ago, the answer is no.
You Have to Meet Eligibility for the Year You’re Claiming
A past-year claim is judged against your circumstances during that year, not now. Both you and your child must have been living in Australia at the time, and you must have held Australian citizenship, a permanent visa, a Special Category visa, or a qualifying temporary visa such as a partner provisional or temporary protection visa. Your child must have been living with you or held Australian citizenship, a permanent visa, or a Special Category visa.4Services Australia. Residence Rules for Family Tax Benefit
For FTB Part A, the child had to be aged 15 or under during the period, or aged 16 to 19 in full-time secondary study with an acceptable study load or a Services Australia exemption.5Services Australia. FTB Part A Eligibility For FTB Part B in a couple family, the youngest child had to be under 13, or under 18 if the carer was a grandparent or great-grandparent. Single parents can receive Part B until the youngest child turns 18.6Department of Social Services. Family Tax Benefit (FTB) – Description
If care of the child was shared during the year, FTB is split by the percentage of care each carer provided, measured mostly by overnight stays. Fewer than 52 nights (under 14%) gets nothing. Between 128 and 175 nights (35% to 48%) attracts a reduced share that scales upward. More than 237 nights (over 65%) attracts the full rate as though you were sole carer.7Department of Social Services. Shared Care Rate Calculation
How Income Is Tested for a Past Year
FTB is calculated on your family’s adjusted taxable income for the year you’re claiming, which is broader than your taxable income on your return. It includes reportable fringe benefits, foreign income, net investment losses, tax-free pensions and benefits, and reportable superannuation contributions, less any deductible child maintenance expenditure.8Department of Social Services. Adjusted Taxable Income
For FTB Part A in 2025–26, the maximum rate applies where family adjusted taxable income is $66,722 or less. Between $66,722 and $118,771, the payment reduces by 20 cents in the dollar down to the base rate; above $118,771, it reduces by 30 cents until it hits zero. The Part A supplement (up to $938.05 per child per year) has a separate cap: family adjusted taxable income must be $80,000 or less.9Services Australia. Income Test for FTB Part A
Part B uses a two-earner test. If the primary earner’s adjusted taxable income exceeds $120,007, the family gets nothing. Below that, the secondary earner can earn up to $6,935 before Part B starts reducing at 20 cents in the dollar.10Services Australia. Income Test for Family Tax Benefit Part B Thresholds and rates change year to year, so check the figures that applied to the specific year you’re claiming.
The Immunisation Check That Trips Up Back-Claims
Immunisation is where past-year claims most often lose money. Children must meet the requirements recorded on the Australian Immunisation Register at the time Services Australia processes your claim, not just at the time of the past period. If the child was behind during the claim period and is still behind when the claim is assessed, your Part A rate is reduced for each day the child didn’t comply.11Department of Social Services. FTB Immunisation Requirements
Exemptions apply for a medical contraindication or documented natural immunity. If the child has fallen behind, getting onto an approved catch-up schedule before assessment can avoid the reduction. Pull your child’s history from the Australian Immunisation Register before lodging so nothing is a surprise.
Confirming Your Income for That Year
No past-year claim gets finalised until you (and your partner, if you had one) have confirmed income for the relevant financial year. If either of you lodged a tax return, the ATO passes those details to Centrelink automatically.12Services Australia. Balancing Family Tax Benefit
If you weren’t required to lodge a return, you need to do two things. First, lodge a non-lodgment advice with the ATO through myGov, under Tax then Lodgments then Non-lodgment advice.13Australian Taxation Office. Lodge a Non-Lodgment Advice Then separately tell Centrelink through your online account that you’re not required to lodge, and confirm your income figures there. Centrelink payments, Veterans’ Affairs income, and any natural disaster payments won’t automatically prefill and have to be added.12Services Australia. Balancing Family Tax Benefit
If You Already Received Fortnightly FTB and Didn’t Confirm
This is where a missed deadline stops being an unclaimed top-up and becomes a debt. If you received fortnightly FTB during the year and don’t confirm income (or lodge a tax return) inside the 12 months, Centrelink raises a non-lodger debt equal to the full amount of FTB you were paid that year. Not the difference, the whole lot.14Department of Social Services. Requirement to Lodge an Income Tax Return
Lodging after the debt is raised gets it recalculated against your real income, and the debt drops to the difference between what you received and what you were entitled to. While it’s outstanding, though, you and any current partner lose the ability to receive FTB based on estimated income. After three or more non-lodger decisions with any debt still owing, that restriction becomes entrenched.15Department of Social Services. Outcomes of Non-Lodger Process
Lodging the Claim
The fastest route is your Centrelink online account through myGov. Sign in, select “Make a claim or view claim status,” then “Make a claim.” Under Families, choose “Get started,” then “Apply for Family Assistance Payments,” and follow the prompts. For a lump sum claim, the system will ask which financial year you’re claiming for.16Services Australia. How to Claim Family Tax Benefit
If you can’t claim online, call the Centrelink families line or download the paper form (“Claim for an annual lump sum payment of Family Tax Benefit”) and post it back. Whichever route you take, the claim has to reach Services Australia before 30 June of the year after the year you’re claiming for.16Services Australia. How to Claim Family Tax Benefit
Have this ready before you start:
- Your tax return or non-lodgment advice for the relevant year, and the same for your partner if you had one
- Identity documents for any child not already recorded with Services Australia
- Bank account details for the lump sum
- Records of care arrangements if you shared custody during the claim period
What the Lump Sum Actually Includes
A past-year lump sum is calculated on your actual income, so the figure is usually more accurate than the estimated fortnightly rate would have been. It also carries the end-of-year supplements: up to $938.05 per child for the FTB Part A supplement and up to $459.90 per family for the Part B supplement, subject to the income tests.17Services Australia. FTB Part A Payment Rates18Department of Social Services. Current FTB Rates and Income Test Amounts
If you had a newborn during the year you’re claiming for and didn’t receive Paid Parental Leave, the Newborn Upfront Payment ($683 per child) and Newborn Supplement (up to $2,052.05 for a first child or $685.23 for subsequent children over up to 13 weeks) come through your Part A claim automatically. The Newborn Supplement amount depends on your Part A rate: at the base rate or higher you receive the full amount, and a reduced Part A entitlement means a reduced supplement.19Services Australia. Newborn Upfront Payment and Newborn Supplement
If you’re inside the deadline for a year you missed, lodge now rather than later. The window closes on 30 June whether you’re ready or not, and the file of past-year claims that Services Australia can’t help with is filled almost entirely with people who thought they had more time than they did.