What Was the Loss Carry Back Tax Offset?

The loss carry back tax offset was a temporary measure introduced by the Australian Government in response to the COVID-19 pandemic. It allowed eligible corporate tax entities (companies) to carry back a tax loss from one income year and apply it against taxable income from a prior year, generating a refundable tax offset.

Under the scheme, a company that made a tax loss in the 2019-20, 2020-21, 2021-22, or 2022-23 income year could choose to carry that loss back and offset it against profits from as early as the 2018-19 income year. This provided businesses with immediate cash flow support by generating a refund of tax previously paid.

The offset was calculated at the company tax rate (25% for base rate entities with aggregated turnover under $50 million, or 30% for other companies) multiplied by the amount of loss carried back. For example, a base rate entity with a $100,000 tax loss in 2022-23 could carry it back to 2020-21 and receive a $25,000 refund.

Eligibility Requirements (When It Was Active)

To access the loss carry back tax offset, a company needed to satisfy several conditions. The key requirement was that the company was an Australian resident corporate tax entity — sole traders, partnerships, and trusts were not eligible for this specific measure, though they could still carry losses forward under standard rules.

The company must have had taxable income in the earlier income year to which the loss was being carried back. The offset could not reduce the prior year's tax below zero — it simply generated a refund of tax already paid. Companies also needed to satisfy the $2 million annual cap, meaning the total loss carried back in any single year could not exceed $2 million.

Importantly, the loss carry back was optional. Companies could choose to carry losses forward instead, which may have been more beneficial depending on their circumstances. The choice was made when lodging the tax return for the loss year, and once made, the election was generally irrevocable.

There was no aggregated turnover limit for the loss carry back offset — companies of any size could access the measure. This was a significant difference from many other COVID-19 support measures, which were restricted to small and medium businesses.

How Loss Carry Back Was Calculated

The calculation for the loss carry back tax offset was relatively straightforward. First, you determined the amount of tax loss you wished to carry back (up to $2 million per year). Then you identified the earliest available prior year with sufficient taxable income to absorb the loss.

The offset was calculated by multiplying the carried-back loss by the company tax rate for the loss year. For base rate entities (those with aggregated turnover under $50 million and no more than 80% passive income), the rate was 25%. For all other companies, the rate was 30%.

Here is a practical example: A base rate entity company paid $75,000 in tax on $300,000 profit in 2020-21. In 2022-23, the company made a tax loss of $200,000. By carrying back the $200,000 loss to 2020-21, the company's taxable income for 2020-21 was recalculated as $100,000, reducing the tax to $25,000. The company received a refund of $50,000 (the difference between tax originally paid and the recalculated amount).

Current Tax Loss Options for FY 2025-26

Since the loss carry back tax offset expired after 2022-23, businesses making losses in FY 2025-26 must rely on the standard carry forward loss rules. Under these rules, a tax loss can be carried forward indefinitely and offset against future profits, subject to the continuity of ownership test or same business test.

The continuity of ownership test requires that more than 50% of the company's shares are held by the same people who held them at the end of the loss year. If this test is failed, the company may still deduct losses if it passes the same business test, which requires the company to carry on the same business as it did before the ownership change.

For small business entities (aggregated turnover under $10 million), additional concessions may be available. The instant asset write-off (currently $500,000 for FY 2025-26) allows small businesses to immediately deduct eligible asset purchases rather than depreciating them over time, which can help reduce taxable income in profitable years.

If you are a small business owner operating as a sole trader or partnership, your business losses can be offset against your other income (such as salary or investment income) in the same year, subject to non-commercial loss rules. This is a significant advantage over the company structure for loss utilization. Use our income tax calculator to estimate how different income sources interact with your tax position.

Strategies for Managing Tax Losses in 2025-26

While the loss carry back offset is no longer available, businesses have several strategies to maximize the value of their tax losses. The most straightforward approach is to accelerate income into the current year if you have losses to offset, or defer deductions to future years when you expect to be profitable again.

Companies with accumulated losses should plan carefully for ownership changes. If you are considering selling the business or bringing in new investors, the continuity of ownership test must be satisfied to preserve your loss carry forward position. Alternatively, ensure the company continues the same business to pass the same business test.

For companies in a group, tax losses may be transferred between group members under the tax consolidation rules or the loss transfer provisions. This allows a loss-making company to transfer its losses to a profitable related company within the same wholly-owned group, effectively achieving a similar outcome to the loss carry back offset.

Superannuation contributions remain a valuable tool for sole traders and partnerships to manage taxable income. If you are self-employed, making concessional super contributions can reduce your taxable income in profitable years, while claiming deductions for super in loss years may not be beneficial. Use our superannuation calculator to plan your contribution strategy across the business cycle.

Business Structure Considerations

The structure of your business significantly affects how tax losses are treated. Sole traders and partnerships can generally offset losses against other personal income (salary, investments) in the same year, subject to the non-commercial loss rules. This provides immediate tax relief without needing to carry losses forward or backward.

Companies cannot pass losses through to shareholders. Company losses are locked inside the company and can only be used when the company generates future profits. This makes company losses less flexible than losses in other structures, which is why the loss carry back offset was particularly valuable for companies when it was available.

Trusts can distribute losses to beneficiaries under certain conditions, though the rules are complex. Generally, a trust loss can be carried forward by the trust itself and applied against future trust income, but beneficiaries cannot directly benefit from trust losses in the same way they benefit from trust profits. Use our take-home pay calculator to understand how different business structures affect your overall financial position.

Frequently Asked Questions

Can I still claim the loss carry back offset for FY 2025-26?

No. The loss carry back tax offset was only available for losses incurred between 2019-20 and 2022-23 inclusive. For FY 2025-26, you must carry your tax losses forward to offset against future profits under the standard loss carry forward rules.

What was the maximum refund available under loss carry back?

The maximum loss that could be carried back in any single year was $2 million. At the 25% company tax rate for base rate entities, this generated a maximum refund of $500,000 per year. At the 30% rate, the maximum was $600,000 per year.

Can I carry back losses if I am a sole trader or partnership?

No. The loss carry back tax offset was only available to corporate tax entities (companies). Sole traders and partnerships could not access this measure, though they generally have more flexibility to offset losses against other income in the current year under standard tax rules.

How long can I carry forward tax losses in Australia?

Tax losses can be carried forward indefinitely in Australia for companies (subject to the continuity of ownership test or same business test). For sole traders and partnerships, losses can also be carried forward indefinitely, but the same business test applies if there is a significant change in the nature or conduct of the business.

What is the instant asset write-off limit for FY 2025-26?

For FY 2025-26, small businesses (aggregated turnover under $10 million) can immediately deduct eligible assets costing less than $500,000 each. This concession can help reduce taxable income in profitable years but does not replace the loss carry back offset for companies with existing losses.

Does the loss carry back offset affect my PAYG instalments?

Yes. When you lodged your tax return with a loss carry back election, the ATO adjusted your PAYG instalments for subsequent years to reflect the reduced tax position. If you are still managing the aftermath of a loss carry back claim from prior years, ensure your current year PAYG instalments are correctly calculated using our income tax calculator as a reference.