Solar Financing Options in South Africa: Cash, Loan, Lease, or PPA?

Buying outright delivers the full Section 12B benefit in year one. You own the asset, claim the 125% deduction, and enjoy free electricity for 25+ years after payback.\n\nThe upfront capital requirement is the main barrier. However, with Section 12B returning up to 34% of the cost as a tax saving in year one, the effective outlay is substantially lower than the sticker price.\n\nCash purchase is the optimal route for businesses with available capital or retained earnings. The after-tax IRR typically exceeds 25%, outperforming most alternative uses of the capital.

Asset finance from commercial banks or specialist solar lenders spreads the cost over 5-7 years. Monthly repayments are often lower than the electricity savings from day one, creating an immediate positive cash flow.\n\nSection 12B can still be claimed by the borrower if they own the asset. The full 125% deduction applies in year one even though the loan is repaid over several years. This creates an asymmetric benefit: large tax saving upfront, costs spread over time.\n\nInterest on the loan is separately deductible as a business expense, further improving the after-tax economics.

Some providers offer solar systems on an operating lease. The monthly rental is a fully deductible operating expense, but you cannot claim Section 12B because you do not own the asset.\n\nLeasing suits businesses that cannot utilise the Section 12B deduction (e.g., those with assessed losses). The simplicity of a fixed monthly cost with no balance-sheet impact appeals to certain CFOs.\n\nCompare the total lease cost over the contract term against outright purchase. Leasing typically costs more in total but preserves capital.

Under a PPA, a third party owns the solar system on your roof and sells you electricity at an agreed rate, typically 20-30% below grid tariff. You have zero capital outlay and no maintenance responsibility.\n\nYou cannot claim Section 12B under a PPA because you don't own the asset. The PPA provider claims the tax benefit and factors it into their pricing.\n\nPPAs are attractive for businesses in leased premises or those without appetite for capital expenditure. Contract terms are typically 15-20 years with escalation clauses.

If you can use the Section 12B deduction and have capital available, cash purchase delivers the highest total return. Asset finance is the next best option, preserving the tax benefit while spreading the cost.\n\nIf Section 12B is not useful (assessed losses, tax-exempt entity), a PPA or lease may make more sense. The table below summarises the trade-offs:\n\nCash: Highest ROI, full 12B, requires capital. Loan: High ROI, full 12B, no capital needed. Lease: Moderate ROI, no 12B, simple. PPA: Lowest ROI, no 12B, zero risk.