Loss relief allows Irish companies to reduce their tax bills by carrying forward or backward trading losses to offset against taxable profits, supporting business recovery and cash flow management.

Loss relief is a key Irish tax provision that allows your company to use trading losses to reduce corporation tax liability. When your business operates at a loss during an accounting period, rather than simply absorbing this financial setback, you can apply those losses against profits from other years through specific mechanisms approved by Revenue.
There are two main methods for utilising loss relief: carrying losses forward to future accounting periods, or carrying them back to previous periods. The forward method applies losses against future profits, reducing upcoming tax bills, whilst the backward method claims refunds on corporation tax already paid in prior years, providing immediate cash flow support.
This mechanism is particularly valuable for startups and cyclical businesses, providing vital financial breathing room during downturns and incentivising entrepreneurial risk-taking. Proper utilisation requires careful planning with your accountant and adherence to Revenue's specific timing rules, ensuring maximum benefit whilst maintaining full tax compliance with Irish tax law.
In Ireland, loss relief operates through a structured system where trading losses from one accounting period can be offset against profits from other periods. The process begins when your company files its annual corporation tax return, reporting a trading loss. Your accountant calculates the eligible loss amount after adjusting for non-trading items and capital allowances.
You can then elect to carry these losses forward indefinitely against future trading profits from the same trade. Alternatively, you may carry them back one year against profits from the immediately preceding accounting period. The choice depends on your cash flow needs and future profit projections, making strategic timing essential for optimal benefit.
Only trading losses directly related to your company's primary business activities qualify for loss relief. These typically include operating expenses exceeding revenue, costs of goods sold, employee wages, rent, and other day-to-day business expenditures incurred wholly and exclusively for trade purposes.
Capital losses, such as losses from selling assets below cost, do not qualify for this relief. Similarly, losses from investment activities or non-trading income sources are excluded. Your accountant must carefully separate trading from non-trading elements during your financial year end computations to ensure only eligible losses are claimed.
Yes, Irish tax law allows you to carry trading losses both backward and forward, though with different time limitations. Losses carried back can offset profits from the immediately preceding accounting period of the same duration. This generates a tax refund, providing immediate cash injection when most needed.
Losses carried forward continue indefinitely until fully utilised against future trading profits. There is no statutory time limit, but the trade must continue for losses to remain eligible. You cannot carry losses back more than one year, making forward relief the primary option for substantial or prolonged loss periods.
Trading losses can be carried forward indefinitely under Irish tax law, provided your company continues the same trade that generated the losses. There is no statutory expiry date, offering long-term tax planning flexibility for businesses experiencing extended startup phases or economic downturns.
However, if your company ceases trading or substantially changes its business activity, unused losses may be forfeited. Additionally, changes in company ownership can restrict loss utilisation under anti-avoidance rules, requiring professional advice to preserve relief during corporate restructuring or ownership transitions.
To claim loss relief, you must maintain comprehensive records including your corporation tax computation, detailed profit and loss accounts showing the loss calculation, and supporting documentation for all expenses claimed. Revenue may request evidence that losses stem from genuine trading activities rather than artificial arrangements.
Your accountant prepares this documentation as part of your annual corporation tax return (Form CT1), which must be filed within nine months of your financial year end. The election to use losses must be clearly stated on the return, with separate calculations for carry-back and carry-forward claims where both options are utilised.
Loss relief primarily applies to companies subject to corporation tax, including limited companies, public limited companies, and unlimited companies engaged in trade. Most corporate structures can benefit, though specific rules apply to group companies, consortiums, and investment holding companies with different treatment.
Sole traders and partnerships operate under different income tax rules with their own loss relief provisions. Foreign-owned Irish companies can utilise losses subject to specific conditions and treaty considerations. Professional guidance ensures correct application based on your company's legal structure and ownership profile.
Several limitations exist within Irish loss relief rules. The most significant is the "same trade" requirement, meaning losses can only offset profits from continuing the same business activity. Substantial changes to your trade may disqualify unused losses.
Anti-avoidance provisions restrict loss utilisation following changes in company ownership or control, particularly where the change coincides with significant debt arrangements. Additionally, losses cannot create or augment a tax relief repayment claim beyond actual tax paid in prior years, preventing artificial refund scenarios.
Group relief allows companies within a 75% ownership group to transfer trading losses to other group companies for immediate offset against their profits. This differs from standard loss relief where losses remain with the originating company.
Group relief provides valuable flexibility for corporate groups with mixed profitability, enabling overall tax optimisation. However, complex rules govern eligibility, requiring careful structuring and documentation to satisfy Revenue's group relief conditions and prevent challenge during compliance reviews.