Small Business Corporation Tax Calculator

A Small Business Corporation (SBC) is a special tax status under Section 12E of the Income Tax Act. If your company qualifies, you pay preferential progressive rates instead of the flat 27% company rate — potentially saving tens of thousands of rand a year on the same profit.

SBC is not a registration you apply for. It’s a tax-return classification that SARS applies automatically if your return shows the company meets all the criteria. You tick the SBC box on ITR14 and declare the relevant turnover and shareholder information.

• Shareholders are natural persons only. No company, trust, or co-operative shareholders allowed.
• Each shareholder holds shares in this one SBC. A shareholder may not hold more than 5% in another company (other than listed shares, collective schemes, and certain exempt entities).
• Annual turnover under R20 million for the year of assessment.
• Not more than 20% of income comes from investment income or personal services (consulting where you essentially provide your own labour). This rules out most pure-consulting “personal service providers”.
• Not a personal service provider as defined in the Fourth Schedule — companies set up to shelter an individual’s service income from PAYE.

Compare this with the flat 27% rate that applies to standard companies — the SBC scale saves meaningful money at profit levels below R550,000, and remains slightly more efficient even above that due to the tax-free and 7% bands.

Small businesses in South Africa have three possible tax treatments. The right one depends on your turnover, profit margin, and whether you can meet the SBC shareholder/activity tests.

• Standard company tax — flat 27% on taxable income. Simpler paperwork, works at any size.
• SBC under Section 12E — progressive rates, qualifying criteria, full accounting records required. Usually best for companies with profit between R99k and ~R3m that meet the tests.
• Turnover tax (Sixth Schedule) — flat tax on gross turnover (not profit), no VAT or PAYE registration required. Suits micro-businesses under R1m turnover with healthy margins. Uses the turnover tax brackets (0% to R335k, scaling up to 3% above R750k).

Turnover tax wins if you have low expenses (high margin services) and simple operations. SBC wins if you have meaningful operating costs and want standard company compliance. Model both before deciding — the choice is annual.

Beyond the rate discount, SBCs enjoy:

• Accelerated wear-and-tear. Manufacturing plant and machinery can be written off 100% in the year of acquisition. Non-manufacturing assets use 50/30/20 over three years instead of standard rates.
• No Skills Development Levy below the R500,000 annual payroll threshold — standard, but more commonly relevant to SBCs.
• Dividends from SBC retained earnings still attract 20% dividends withholding tax, but the lower company tax rate means more retained profit is available.

Enter your expected annual taxable income (profit before tax) and the calculator applies the 2026/2027 SBC brackets to show your SBC tax, compares it to what a standard company would pay at the flat rate, and shows the saving.

The calculator doesn’t check the qualifying criteria for you — make sure all five Section 12E tests are met before ticking the SBC box on ITR14. SARS will reassess you under standard company rates (plus interest and penalty) if it finds the classification was wrong.

• SARS — Small Business Corporation tax rates
• SARS — Interpretation Note 9 (SBC)
• SARS — Guide on SBC for small businesses