Section 12B: How SA Businesses Claim Tax Back on Solar

For South African businesses, solar is not just a way to cut electricity costs and beat load shedding, it also comes with a meaningful tax benefit. Section 12B of the Income Tax Act lets businesses deduct the cost of renewable-energy assets, which improves the return on a solar investment considerably.

How Section 12B works

Under the standard Section 12B provision, a business can deduct the full cost of a qualifying renewable-energy asset, including solar PV, in the year it is brought into use. Rather than depreciating the cost over many years, the deduction is taken upfront, which reduces taxable income and therefore the tax bill in that year.

The asset must be used in the production of income in the business, and it must be owned by the business claiming the deduction.

The enhanced 125% window

To accelerate private investment in generation during the energy crisis, government introduced a temporary enhanced incentive (Section 12BA) that allowed businesses to deduct 125 percent of the cost of qualifying new and unused renewable-energy assets brought into use within a defined window. That enhanced window was time-limited, so whether the 125 percent uplift or the standard 100 percent deduction applies depends on when your asset is brought into use.

Because these rules and their dates change, always confirm the current position with SARS or a registered tax practitioner before you rely on a specific percentage.

What this means for the numbers

The deduction does not make solar free, but it shifts the economics. A business that pays tax effectively recovers a portion of the system cost through a lower tax bill, which shortens the payback period compared with a household installing the same system. Combined with the daily savings on electricity and protection from load shedding, the case for commercial solar is strong. See our guide to commercial solar ROI.

Get the compliance right

To claim, the installation must be legitimate and properly documented, with the correct electrical sign-off and Certificate of Compliance. Larger systems may require engineering sign-off too, which we cover in our accreditation bodies guide. Keep your invoices and compliance certificates for your tax records.

This article is general information, not tax advice. Confirm the current rules with SARS or your tax practitioner, then get free quotes from verified installers for your business.