Solar Tax Calculator
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Section 12B — 100% First-Year Deduction

How much will solar save your business?

Calculate your Section 12B tax deduction, payback period, and 25-year ROI in under 5 minutes.

Calculate Your Savings See how it works
12.7%

Eskom tariff increase 2025/26

2x

Your bill doubles in ~6 years

100%

Section 12B first-year deduction

Everything in your report

A comprehensive, independent analysis — not a sales pitch from a solar installer.

Section 12B Deduction

Year 1 Tax Saving

25-Year Cash Flow

IRR & NPV

Payback Period

Tariff Impact

Sensitivity Analysis

Branded PDF

Three steps to your report

Simple process. Professional output.

01

Enter your details

Business info, electricity usage, and solar specs. Takes 2 minutes.

02

See your ROI preview

Instant preview of your deduction, tax saving, and payback.

03

Get your full report

Pay R799, download your branded PDF. Emailed too.

Built for decision-makers

Business Owners

Get the numbers to make a confident investment decision.

CFOs & Finance Teams

Board-ready report with IRR, NPV, and payback analysis.

Independent Analysis

Objective, data-driven — not a sales pitch from a solar installer.

Frequently asked questions

Section 12B of the Income Tax Act allows businesses to deduct 100% of the cost of qualifying solar PV systems (under 1 MW) in the first year of use. This means your solar installation reduces your taxable income, resulting in a significant tax saving. This is a permanent provision.
No. Section 12BA expired on 28 February 2025. Section 12B (100% first-year deduction for systems under 1 MW) is permanent and remains available.
No. Only generation assets — panels, inverters, and mounting structures. Battery storage is not eligible, but our report includes battery costs in the overall ROI analysis.
Systems of 1 MW or above get accelerated depreciation over 3 years (50/30/20) instead. Our calculator handles this.
No. This report is for informational and modelling purposes only. Consult a registered tax practitioner before making investment decisions.
You can run a new calculation with different inputs at any time. Each report is a one-time purchase at R799.

Calculate your solar ROI

Enter your details below. Takes about 2 minutes.

Tell us about your business

We need a few details to calculate your Section 12B deduction.

Your report will be sent here

R

Standard: 27%

Your electricity usage

This helps us calculate how much solar energy you can offset.

Check your Eskom or municipal bill

R

2025/26 Eskom average: R2.85/kWh

NERSA-approved 2025/26 increase: 12.70%

Your solar system

Enter the details from your solar quote, or use the guide below.

Max 999 kW for 100% first-year Section 12B deduction

R

Tip: No quote yet? Use R12,000–R16,000 per kW as a guide for commercial systems.

Includes battery storage?

Battery costs are NOT eligible for Section 12B

R

Review your details

Confirm everything looks correct, then generate your report.

Your Business

Company
Email
Industry
Warehouse/Distribution
Taxable Income
R
Tax Rate
27.00%

Your Electricity

Monthly Usage
kWh
Tariff Rate
2.85/kWh
Escalation
12.70%

Your Solar System

System Size
kW
Installation Cost
R
Solar Yield
1500 kWh

Ready to see your numbers?

Section 12B is a permanent provision. But electricity costs keep rising. The sooner you invest, the more you save.

Calculate Now — R799