Small Business Tax: Annual and Provisional

Small Business Tax: Annual Income Tax and Provisional Tax Explained for South African Business Owners

March 24, 2026•8 min read

This is article #2 of 5 in the Small Business Tax Series

Introduction

When you run a business, one of your most important responsibilities is paying income tax. Income tax is based on the profit that your business makes during the financial year. In South Africa, this tax is managed by the South African Revenue Service (SARS).

For many small business owners, tax becomes confusing because there are two related processes involved:

Provisional tax payments during the year, and
An annual income tax return after the year ends.

These two systems work together. Provisional tax allows businesses to pay tax in advance during the year, while the annual return is used to calculate the final tax amount and reconcile what was already paid.

Understanding this system is extremely important for small business owners. If you do not plan for tax properly, you may face large unexpected payments, penalties, or interest from the South African Revenue Service.

In this article, we will explain how annual income tax and provisional tax work, how to register, how these taxes are calculated, when they must be submitted, and how to estimate your payments correctly.

Understanding Income Tax for Business Owners

Income tax is a tax on profit, not on total income.

Your business profit is calculated by subtracting your business expenses from your business income.

Example:

Total sales for the year: R800,000
Business expenses (rent, salaries, equipment, etc.): R500,000
Profit = R300,000

This R300,000 is called taxable income. SARS uses this amount to calculate how much tax the business must pay.

Different business structures are taxed differently:

Sole proprietors: Taxed as part of the owner’s personal income.
Companies: Pay corporate income tax.
Partnerships: Each partner pays tax on their share of profits.
Regardless of the business structure, most business owners must deal with provisional tax if they earn income that is not taxed through a salary system like PAYE.

What Is Provisional Tax?

Many people think provisional tax is a separate tax. It is not.

Provisional tax is simply a system used by SARS to collect income tax in advance during the year.

Instead of paying all your income tax at the end of the year, SARS requires businesses to estimate their profit and pay tax in instalments during the year.

This system helps prevent business owners from facing a very large tax bill after the financial year ends.

Provisional tax normally requires two compulsory payments each year, with a third optional “top-up” payment if needed.

Most small business owners are provisional taxpayers because they earn income from their businesses rather than from salaries where PAYE is deducted.

Examples of people who usually pay provisional tax include:

Business owners
Freelancers
Consultants
Landlords earning rental income
Investors with significant non-salary income

The Relationship Between Provisional Tax and Annual Income Tax

Think of provisional tax as paying tax during the year, and the annual tax return as finalizing the calculation.

The process works like this:

During the year you estimate your profit and pay provisional tax.
After the financial year ends you submit an annual income tax return.
SARS calculates the actual tax you owe.
The provisional payments are subtracted from the final tax amount.

Three outcomes are possible:

Scenario 1: You paid enough provisional tax. No additional payment is required.

Scenario 2: You paid too little provisional tax. You must pay the remaining amount.

Scenario 3: You paid too much provisional tax. SARS will refund the difference.

How to Register for Provisional and Annual Tax

Before paying any taxes, your business must be registered with the South African Revenue Service.

Most businesses register for tax when they register their company or start operating. The easiest way to manage your taxes is through SARS eFiling.

Step 1: Register on SARS eFiling

You can create an account on the SARS eFiling platform. This system allows you to:

Register for different tax types
Submit tax returns
Make tax payments
View assessments and notices

Once you are registered, you can add provisional tax to your profile.

Step 2: Register as a Provisional Taxpayer

Within eFiling, you can activate provisional tax and request the IRP6 form, which is used to submit provisional tax returns.

Even if your estimated tax is zero, the return must still be submitted.

Step 3: Submit Your Annual Income Tax Return

After the tax year ends, you must submit your annual income tax return. For individuals and sole proprietors, this return is called ITR12. For companies, the return is called ITR14.

These returns provide SARS with your final financial information for the year.

When Provisional Tax Must Be Paid

The South African tax year usually runs from 1 March to 28 February.

Provisional tax must be paid during two compulsory periods.

First Provisional Payment

Deadline: End of August

This payment is based on an estimate of your expected taxable income for the year. Normally you pay about half of the expected tax for the year.

Second Provisional Payment

Deadline: End of February

This payment is based on a revised estimate of your income. By this stage, your estimate should be very close to your actual results.

Third Optional Payment

Deadline: End of September

This payment is optional and is used if your earlier estimates were too low. It allows you to correct the difference before penalties and interest apply.

These payments help spread your tax liability across the year instead of paying one large amount at once.

When Annual Income Tax Returns Must Be Submitted

After the tax year ends, you must submit your final income tax return. For provisional taxpayers, the filing deadline is usually January of the following year, depending on the SARS filing season.

The annual return includes:

Total business income
All business expenses
Profit or loss
Tax already paid through provisional tax

Once submitted, SARS reviews the return and issues a tax assessment.

How Provisional Tax Is Calculated

The provisional tax calculation begins with estimating your taxable income for the full year.

The basic process looks like this:

Estimate your expected income.
Subtract expected expenses.
Calculate estimated profit.
Apply the relevant tax rate.
Divide the tax into provisional payments.

Example 1: Simple Provisional Tax Calculation

Let’s assume a small consulting business expects the following for the year:

Income: R900,000

Expenses: R500,000

Estimated profit: R400,000

If the estimated tax on this profit is R80,000, the provisional tax payments would work like this:

First provisional payment (August)

50% of estimated tax = R40,000

Second provisional payment (February)

Total estimated tax = R80,000

Minus first payment = R40,000

Second payment = R40,000

Total provisional tax paid for the year = R80,000

Example 2: When Income Increases During the Year

Now imagine the business performs better than expected.

New estimated profit: R500,000

New estimated tax: R110,000

The payments would change.

First payment (August): R40,000

Second payment (February):

R110,000 – R40,000 = R70,000

This is why the second provisional return allows you to update your estimates.

Example 3: When Income Was Underestimated

Let’s say the final tax owed is R120,000, but only R90,000 was paid through provisional tax.

Remaining tax payable:

R120,000 – R90,000 = R30,000

If this difference is too large, SARS may apply penalties and interest. Underestimating tax by too much can result in penalties of around 20% of the underpaid amount plus interest.

This is why accurate estimates are important.

Practical Tips for Small Business Owners

Managing provisional tax becomes easier when you build good financial habits.

Here are a few practical tips:

Keep Accurate Financial Records

Your provisional estimates will only be accurate if your bookkeeping is correct.

Good records include:

Sales invoices
Expense receipts
Payroll records
Bank statements

Review Your Numbers Regularly

Instead of waiting until August or February, review your financial performance every month. This will make estimating your tax much easier.

Set Money Aside for Tax

Many business owners struggle with tax because they spend all their income.

A good rule is to set aside a percentage of profit for tax each month.

This prevents cash flow problems when provisional payments are due.

Work With a Professional

A bookkeeper or accountant can help calculate your tax estimates and ensure that returns are submitted correctly.

However, the final responsibility still belongs to the business owner.

Penalties for Missing Deadlines

SARS takes tax compliance seriously. If provisional tax payments or annual returns are submitted late, the South African Revenue Service may apply penalties.

Common penalties include:

10% penalty for late payments
Interest on unpaid tax
20% penalty for significant underestimation of income

These penalties can quickly become expensive for small businesses.

Planning ahead and meeting deadlines is therefore extremely important.

Why Every Business Owner Must Understand These Taxes

Annual income tax and provisional tax returns are a central part of running a business in South Africa. These systems ensure that businesses pay tax throughout the year and then finalize their tax obligations after the financial year ends.

Even if you hire a bookkeeper or accountant, you as the business owner must still understand how this system works. When you understand provisional tax, you can plan your cash flow, avoid penalties, and make smarter financial decisions for your business.

In the next article in this Small Business Tax series, we will explore another important tax topic for entrepreneurs: Turnover Tax. This simplified tax system was designed specifically for very small businesses and can sometimes replace several other taxes, making compliance easier for micro enterprises. Understanding when this system applies—and when it does not—can help small business owners choose the best tax structure for their situation.