Do you pay tax on solar export income?
For typical domestic solar systems, the Smart Export Guarantee income you earn is not usually taxed, as it is treated as a domestic arrangement rather than a business. Very large systems, or solar tied to a business or let property, can be treated differently. If in doubt, check current HMRC guidance or speak to an accountant.
The general position
- Ordinary home solar export income is not usually taxable.
- The system being domestic and primarily for your own use matters.
- Business premises, large arrays or let properties may be treated differently.
- Rules can change, so confirm the current position before relying on it.
When to seek advice
If you have an unusually large system, run a business from home, or are a landlord generating export income, the tax treatment can differ. A quick check with HMRC guidance or an accountant clears it up. For the vast majority of homeowners, SEG income is simply a bonus on top of bill savings.
Frequently asked questions
- Is the Smart Export Guarantee taxable?
- Not usually for a normal domestic system. Larger or commercial setups may be treated differently, so check current HMRC guidance.
- Do I need to declare solar savings?
- Bill savings are not income and are not declared. Export income for typical home systems is generally not taxed either.
Related questions
Indicative estimates based on UK average data. Last updated 27 May 2026.