Do solar panels increase business rates?

For systems under 50kW on an occupied building: usually no. For systems over 50kW: the VOA may assess the solar installation separately, creating a modest business rates bill (typically £500–£2,000/year for a 100kW system). This reduces but does not eliminate the excellent commercial solar ROI.

Do residential solar panels attract business rates?

No — residential solar panels have zero business rates implications regardless of size. They also do not affect your council tax band. SEG income from domestic solar is tax-free.

How do I avoid business rates on solar?

Size your system at under 50kW, install on an occupied building (not standalone), and use roof-mounted rather than ground-mounted. For systems over 50kW, consult a rating surveyor before installation to understand the likely impact.

Can I appeal solar panel business rates?

Yes — if you disagree with the VOA's assessment, you can appeal the rateable value through the Check, Challenge, Appeal process. A specialist rating surveyor can advise on whether the assessment is correct.

Solar Panels & Business Rates

Last updated: 18 March 2026

Independently written

Commercial solar installation — business rates implications depend on system size — Under 50kW on occupied premises: no additional business rates. Over 50kW: may be separately rated.

Do solar panels attract business rates?

For most UK businesses: solar panels under 50kW on an occupied premises do NOT attract separate business rates. The panels are treated as part of the building's plant and machinery. Over 50kW: the VOA may assess the solar installation as a separate rateable entity, potentially attracting its own business rates. For residential properties: solar panels have zero business rates implications regardless of size. The threshold and rules are complex — consult your accountant for large commercial installations.

Business Rates Rules for Solar

Under 50kW (most small-medium businesses): - Solar panels on an occupied commercial building are generally treated as plant and machinery - Plant and machinery within a building is typically NOT separately rated - The building's rateable value may not change (or may change marginally) - Net effect: no significant business rates increase

Over 50kW (larger installations): - The Valuation Office Agency (VOA) may assess the solar installation as a separate hereditament (rateable entity) - This means the solar system could receive its own business rates bill - The rateable value is based on the rental value of the electricity generated - Typical business rates on a 100kW solar system: £500–£2,000/year - This reduces your solar ROI but usually does not eliminate it

Ground-mounted solar (any size on separate land): - Almost always assessed as a separate hereditament - Business rates apply based on the land area and generation capacity - Rates: typically £5–£15 per kW of capacity per year

Residential: - Zero business rates implications for domestic solar, regardless of size - Council tax is NOT affected (VOA confirmed) - SEG income is NOT taxable

Source: VOA rating guidance for renewable energy; Business Rates (Plant and Machinery) Regulations.

Business rates may reduce but do not eliminate commercial solar ROI — Even with business rates on larger systems, commercial solar ROI remains strongly positive.

Impact on Commercial Solar ROI

50kW system on a commercial roof (no separate business rates): - Installation cost: £50,000 - Tax relief (25% CT): –£12,500 - Annual savings: £10,000 - Business rates impact: £0 - Payback: 3.8 years

100kW system (potentially separately rated): - Installation cost: £85,000 - Tax relief: –£21,250 - Annual savings: £20,000 - Business rates: –£1,500/year - Net annual benefit: £18,500 - Payback: 3.4 years (still excellent despite rates)

Key point: Business rates on larger systems are a cost but NOT a deal-breaker. The tax relief (25% immediate deduction) and high annual savings dwarf the rates bill. Commercial solar remains one of the best business investments even with rates.

Source: VOA rating methodology; commercial solar financial modelling.

Most business solar is under 50kW — no separate rates — Most SME solar installations are under 50kW — below the threshold for separate business rates.

How to Minimise Business Rates Impact

Stay under 50kW — if possible, size your system at 49.9kW or below to avoid separate rating threshold
Install on an occupied building — plant and machinery on occupied premises is less likely to be separately rated than standalone installations
Avoid ground-mounted — ground-mounted arrays are almost always separately rated. Roof-mounted has a better chance of being treated as part of the building
Get professional advice — for systems over 50kW, consult a rating surveyor BEFORE installation to understand the likely rates impact
Challenge the assessment — if the VOA assesses your solar separately and you disagree, you can appeal the rateable value
Claim Small Business Rate Relief — if your solar is on a qualifying small business premises, you may be eligible for rate relief

Residential vs Commercial: Summary

| | Residential | Commercial (under 50kW) | Commercial (over 50kW) | |---|------------|----------------------|----------------------| | Council/business rates | No impact | Usually no impact | May attract separate rates | | Income tax on savings | Tax-free | Pre-tax expense saving | Pre-tax expense saving | | SEG income | Tax-free | Taxable revenue | Taxable revenue | | Capital allowances | Not available | 100% first-year | 100% first-year | | VAT | 0% (not reclaimed) | 20% (reclaimed) | 20% (reclaimed) |

Source: HMRC; VOA; Business Rates guidance.

Residential solar has zero rates or tax implications — For homeowners: zero rates, zero tax on savings, zero tax on SEG income. Simple.

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