Company loss carry-back returns from 1 July 2026, giving eligible companies a way to use a 2026-27 loss against tax paid in the previous two income years. Where the conditions are met, that can produce a refund and improve cashflow when the business needs it most.

Don't confuse this with a deduction for a sole trader or a trust. The measure is for businesses operating through a company. It also doesn't create money from a loss by itself. The company needs prior taxable profits and tax actually paid for the option to have value. That is why the planning starts with old assessments and cashflow, not with the current loss figure alone.

My strong opinion is that a loss year deserves more discipline, not less. Many directors stop looking at tax planning once profit disappears. That is backwards. A loss can affect working capital, lending conversations and the next year of investment. The chance to access earlier tax paid makes accurate records especially important.


How company loss carry-back works from 1 July 2026

From 1 July 2026, eligible companies that make a loss can use that loss to seek a refund of tax paid in the previous two income years. In plain English, the company may be able to offset a current loss against earlier taxable profits instead of waiting to use the loss against a future profit.

The cashflow attraction is clear. A carry-forward loss may reduce tax in a later profitable year. A carry-back claim can bring forward the benefit where the company has paid tax in the two-year look-back period. That timing can matter during a slower trading period, a restructuring phase or a planned reinvestment cycle.

It's still a technical tax election made through the company tax return. Eligibility, the available balance and the amount that can be claimed depend on the law and the company's circumstances. Treat the announcement as a trigger to plan, not as a promise that every loss will turn into a refund.

Start with prior tax actually paid

The first question is not, “How large is the loss?” It is, “What tax did the company actually pay in the two prior income years?” Pull the lodged tax returns, notices of assessment, income-tax account statements and payment records for those periods. Reconcile them to the accounts.

A profitable accounting year is not automatically the same as an available refund. The company needs a prior tax position that supports the claim. Outstanding amendments, unpaid liabilities, offsets and later adjustments can change the picture. You want the final, evidenced position rather than a management-report estimate.

  • Save the prior tax returns and assessments. They show the taxable income and tax result that sit behind the potential claim.
  • Check the tax account. Confirm payments, credits and any liabilities still outstanding.
  • Keep board packs and year-end accounts. They help explain the commercial movement from profit to loss.
  • Document changes in the business. A new product, lost contract, start-up phase or stock reset may explain a sharp result change.

This file is useful even if a refund is not available. It makes the board's cashflow decisions more informed and avoids relying on a vague recollection of “we paid plenty of tax last year”.


Model the 2026-27 loss before year end

Don't wait for final accounts to find out you have a loss. Update a forecast through the year and separate accounting profit from taxable income. Depreciation, timing differences, provisions, non-deductible costs and one-off adjustments can mean the tax loss differs from the management result.

Build a few honest scenarios. One can assume current trading continues. Another can include a recovery or a delayed customer payment. A third can include an expected expense that is not yet fully reflected in the books. The aim is not false precision. It's to see whether a loss is likely, what is driving it and how much earlier tax may be relevant.

Then add the timing. A refund arising from a tax-return election won't appear just because a spreadsheet says it should. Consider when the books can be finalised, when supporting documents will be ready and whether there are tax-account matters that need to be resolved first. Cashflow plans should leave room for that process.

Keep the company and its losses clearly separated

Loss carry-back is a company measure. A sole trader cannot use personal business losses in this way. A trust's loss belongs in the trust structure and has different rules. A loss in one entity doesn't become available to another entity merely because the owners are the same.

This is particularly important for groups that trade through a company and also hold assets or investments in trusts. Keep bank accounts, invoices, payroll, contracts and inter-entity balances clearly allocated. A messy group file makes it harder to identify the company’s actual taxable loss and can create separate tax problems.

Also review any major ownership or business changes with an adviser. Company losses can be subject to continuity and business tests. The existence of a loss is not enough. The company needs to satisfy the relevant rules for it to use that loss. Get ahead of this before a sale, new investor or major restructure rather than after documents have been signed.

Use the possible refund for a business purpose

A tax refund is cashflow, not extra profit. Once you have a realistic range for the claim, decide how it fits the business plan. The sensible answer may be strengthening a cash reserve, catching up critical suppliers, funding equipment already justified by the trading plan, or reducing high-pressure short-term obligations.

Don't pre-commit the funds while eligibility is unconfirmed. A disciplined approach is to prepare a ranked list: essential commitments first, growth opportunities second, discretionary spending last. That gives the directors a clear decision framework if the refund arrives later than expected or is lower than a working estimate.

If the company has retained earnings or paid-up capital considerations, obtain advice before declaring dividends or moving funds because you expect a refund. The carry-back process needs to be considered with the company's wider tax and legal position.


A practical 2026-27 refund plan

  1. Gather the two prior years now. Save assessments, returns, payment evidence and tax-account statements in one folder.
  2. Forecast taxable income monthly or quarterly. Look for a developing loss before year end, not after.
  3. Reconcile every material balance. Revenue, payroll, inventory, debtors and director loan accounts should support the forecast.
  4. Write a short loss explanation. Record the business facts behind the result while they are fresh.
  5. Test eligibility before promising cash. Include continuity or business-test considerations and any tax-account issues.
  6. Plan the use of funds. Put any potential refund into a cashflow plan with a conservative timing assumption.
  7. Prepare for the tax return early. A tidy file makes it easier to make a correct election and answer follow-up questions.

The aim isn't to engineer a loss. It is to make a poor trading period less damaging by treating the tax position as part of the recovery plan.

What to do now

Open a file for the 2026-27 carry-back review. Add the prior two company tax returns, assessments and proof of tax paid. Ask for an updated taxable-income forecast and identify the assumptions behind it. If a loss is likely, model the possible cashflow benefit with your accountant before you depend on it.

For eligible companies, loss carry-back could be a useful bridge between a difficult year and the next period of growth. The companies most likely to benefit will be the ones with accurate records, prior tax paid and a plan for every dollar of cash that returns.


Sources and references

Frequently asked questions

When does company loss carry-back return?

The announced company loss carry-back measure applies from 1 July 2026.

How far back can an eligible company look?

An eligible company can use a 2026-27 loss against tax paid in the previous two income years.

Can a sole trader use company loss carry-back?

No. The measure is for businesses operating as a company. Sole traders and trusts have different loss rules.

Does a company need to have paid tax before it can receive a refund?

Prior tax paid is central to the carry-back opportunity. A company should review its prior tax returns, assessments and tax account before relying on a refund.

Is a carry-back refund automatic?

No. It depends on eligibility and is dealt with through the company tax return. The available amount must be worked out from the company’s facts.

Should I spend a possible refund before the tax return is finalised?

No. Treat it as a contingent cashflow item until eligibility, the tax return and the resulting amount are confirmed.

Make the next move with a clear plan

A decision about tax, cashflow or structure works better when it fits your wider position. We can help you test the practical steps before you act.

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