UK Self-Employed Loss Relief Calculator 2025-26

Use this free UK Self-Employed Loss Relief Calculator to estimate how much tax relief you can claim if your business made a trading loss. It’s designed for sole traders, freelancers, and partners in UK partnerships who file a Self Assessment tax return.

What the Calculator Does

The tool quickly works out how much of your trading loss can be offset against other income, such as employment or investment income, to reduce your overall tax bill. It also shows whether you can carry your loss forward or back to another tax year under HMRC’s trading loss relief rules.

How to Use

1. Enter your trading loss for the tax year.

2. Add your total income from other sources.

3. Select the tax year (e.g. 2025-26).

4. The calculator estimates the relief you can claim and any refund you may be due.

Types of Loss Relief Available

• Same-Year Relief: Use the loss against income in the same tax year.

• Carry-Back Relief: Offset the loss against profits from the previous year to reclaim tax paid.

• Carry-Forward Relief: Apply the loss against future trading profits.

• Early Years Relief: New businesses can claim losses against income from the three preceding years.

Who Can Use This Calculator

• Self-employed individuals and freelancers

• Sole traders or small business owners

• Partners in UK partnerships

Important Note

This calculator provides an estimate only. Always check your figures against HMRC’s latest guidance or speak with a qualified accountant before submitting your claim.

Need Expert Help?

If you’ve made a trading loss and want to ensure your relief is claimed correctly and efficiently, our tax team can help. We’ll review your accounts, calculate the relief available, and prepare your claim for HMRC.