Accelerated depreciation and GST credit, explained

For commercial and industrial customers, the tax treatment of a solar investment is often worth as much as the electricity savings themselves in the first few years — but it's rarely explained clearly at the point of sale.

Accelerated depreciation allows businesses to write off solar assets against taxable income far faster than typical capital equipment. In practical terms, a large share of the system's cost can be depreciated within the first year or two of commissioning, which directly reduces the tax liability for that financial year. For a profitable business, this can offset a meaningful portion of the system cost purely through tax savings, independent of the electricity bill reduction.

GST input-tax credit works alongside this: the GST paid on the solar system's equipment and installation can, in most commercial and industrial use cases, be claimed as input credit against your regular GST output liability, effectively reducing the net cost of the system further.

Together, these two benefits are why the effective payback period for a well-structured commercial solar investment is often shorter than the simple 'bill savings only' calculation suggests — sometimes by a year or more, depending on your tax bracket and current asset depreciation schedule.

The important caveat: these benefits depend on your business structure, current profitability and existing depreciation schedules, so the exact numbers are specific to each business. We prepare a project feasibility report for every commercial enquiry that includes CAPEX/OPEX breakdown, loan/EMI structuring and a realistic ROI & payback analysis, factoring in these tax treatments rather than a generic estimate — and we'd always recommend your CA confirm the specific treatment for your business before you commit.