When calculating provisional tax, one of the most common questions business owners ask is:

“What expenses can I deduct?”

It’s an important question because provisional tax is based on your estimated taxable income, not simply your turnover.

If legitimate business expenses are missed, you could overestimate your taxable income and pay more provisional tax than necessary.

But the opposite can also create problems.

Claiming private, capital or non-deductible expenses can artificially reduce your taxable income and potentially contribute to an underestimation of provisional tax.

The objective is therefore not to find as many deductions as possible.

It is to identify and correctly record the expenses that are genuinely deductible under South African tax law.

The General Principle

Broadly, South African income-tax rules allow taxpayers carrying on a trade to deduct expenditure and losses actually incurred in the production of income, provided they meet the applicable requirements and are not capital in nature.

There are also specific provisions that allow, limit or prohibit certain deductions.

In practical terms, an expense generally needs a genuine connection to earning business income before you should assume that it can reduce taxable income.

For example, money spent on advertising your business has a very different character from money spent on a family holiday.

The fact that both payments came from the business bank account does not make them both business deductions.

Turnover Is Not Taxable Profit

Consider a small business with annual turnover of:

R1,500,000

During the year it incurs qualifying business expenses of:

R900,000

In a simplified example:

Turnover: R1,500,000

Less qualifying expenses: R900,000

Profit before further tax adjustments: R600,000

The provisional tax calculation should therefore not simply be based on R1.5 million of turnover.

Further tax adjustments may still be required before arriving at taxable income, but correctly recording expenses is an essential starting point.

1. Accounting and Professional Fees

Fees paid for legitimate business services can commonly form part of deductible expenditure.

These might include:

• Accounting
• Bookkeeping
• Payroll administration
• Tax compliance
• Certain legal services
• Business consulting
• Other professional services

The nature and purpose of the expenditure still matter.

A professional fee incurred for an ordinary business activity may receive different treatment from a fee directly associated with acquiring a capital asset.

Keep invoices describing the work performed.

2. Advertising and Marketing

Advertising expenditure incurred to promote the business and generate income will commonly be relevant to the tax calculation.

Examples could include:

• Google Ads
• Social-media advertising
• Website marketing
• Printing
• Brochures
• Signage
• Sponsorships
• Email-marketing services
• Advertising-agency fees

Again, the purpose of the expenditure matters.

Business advertising should be distinguished from private expenditure or expenditure of a capital nature.

3. Bank Charges and Merchant Fees

Businesses can incur significant transaction costs.

Examples include:

• Business bank-account charges
• Card-processing fees
• Payment-gateway fees
• Merchant fees
• Transaction charges

For an e-commerce business processing hundreds of payments every month, these amounts can become substantial over a full year.

Make sure they are being captured correctly in the accounting records.

4. Business Insurance

Insurance relating to the operation of the business may potentially be deductible where the relevant requirements are met.

Examples might include insurance for:

• Business premises
• Stock
• Equipment
• Professional indemnity
• Public liability
• Business interruption
• Other business risks

Personal insurance policies should not simply be included because the premiums were paid from a business account.

5. Rent for Business Premises

If you rent an office, shop, factory, warehouse or other premises used in your trade, the rental expense will generally be relevant when calculating business profit and taxable income.

Associated qualifying costs might also include items such as:

• Utilities
• Cleaning
• Security
• Certain property-related operating costs

The actual lease and nature of the expenditure should be retained as supporting documentation.

6. Salaries and Wages

Employee costs are often one of the largest expenses in a business.

Depending on the circumstances, relevant employment expenditure can include:

• Salaries
• Wages
• Bonuses
• Employer contributions
• Other qualifying staff costs

Payroll must also be administered correctly.

The fact that salary expenditure may reduce business profit does not remove the employer’s separate PAYE, UIF and other payroll obligations.

7. Telephone and Internet Costs

Telephone, mobile-data and internet services used for business can potentially qualify as business expenditure.

The complication arises when the service is used for both business and private purposes.

For example, if a sole proprietor uses one mobile phone for both personal and business calls, it may not be appropriate to claim the entire expense automatically.

A reasonable business-use allocation may need to be determined.

8. Software and Online Subscriptions

Modern businesses often accumulate substantial software expenses.

Examples might include:

• Accounting software
• Cloud storage
• CRM systems
• Project-management software
• Design applications
• Security software
• Industry-specific platforms
• Communication tools
• Website services

These subscriptions can easily be overlooked because many are billed monthly or annually to credit cards.

Review recurring payments periodically and make sure genuine business subscriptions are correctly recorded.

9. Office Supplies and Consumables

Ordinary items used in running the business may potentially qualify as operating expenses.

Examples include:

• Stationery
• Printer consumables
• Packaging
• Cleaning materials
• Small office supplies
• Other consumables

The treatment of larger assets such as computers, printers and machinery can be different, which brings us to an important distinction.

10. Equipment and Capital Assets

Buying an asset for the business does not necessarily mean you can deduct its entire purchase price immediately as an ordinary expense.

Examples include:

• Computers
• Vehicles
• Machinery
• Manufacturing equipment
• Furniture
• Large appliances
• Specialised tools

These items may be capital in nature.

Depending on the asset and circumstances, applicable tax allowances may permit the cost to be written off over a particular period or under a specific provision.

This is why:

“I spent R200,000 on equipment, so my taxable income is automatically R200,000 lower”

is not a safe assumption.

Capital purchases need to be classified correctly.

11. Repairs and Maintenance

Repairs required to keep business assets or premises operating can potentially be deductible.

However, repairing an existing asset and improving or creating an asset are not necessarily the same thing.

For example:

Repairing a damaged section of an existing roof

may be treated differently from:

Building a new extension onto the premises.

Similarly, replacing a broken component of a machine may differ from purchasing an entirely new production machine.

The substance of the expenditure matters more than simply calling something “repairs” in the accounting system.

12. Business Travel

Travel genuinely undertaken for business purposes may potentially give rise to deductible expenditure.

This could include appropriate:

• Flights
• Accommodation
• Vehicle expenses
• Tolls
• Parking
• Other travel costs

But private travel should not be claimed as business expenditure.

Where a trip combines business and private activities, the expenditure may need to be apportioned.

Keep supporting documents and records showing the business purpose of the trip.

13. Motor Vehicle Expenses

Vehicles are another area where business and private use often overlap.

Depending on the circumstances, potentially relevant costs can include:

• Fuel
• Maintenance
• Insurance
• Licence fees
• Finance costs
• Other vehicle operating expenditure

But a vehicle used partly for private purposes does not automatically create a 100% business deduction.

Accurate records, including an appropriate logbook where relevant, can become very important.

14. Cost of Stock and Materials

For businesses that sell physical products, the cost of acquiring or producing stock is obviously important.

This could include:

• Raw materials
• Products purchased for resale
• Manufacturing inputs
• Packaging
• Freight
• Certain direct production costs

However, buying stock and deducting the full cash payment immediately are not always the same thing for tax purposes.

Closing stock on hand at year-end can affect taxable income.

Inventory records therefore matter.

15. Interest and Finance Costs

Interest incurred on money borrowed for genuine business purposes may potentially be deductible, subject to the applicable tax rules and limitations.

It is important to distinguish:

Interest

from:

Repayment of the loan capital.

If a business pays R20,000 towards a loan, the entire R20,000 is not automatically a deductible expense.

Part may represent interest while another part represents repayment of the money originally borrowed.

16. Home-Office Expenses

Home-office deductions are an area where taxpayers should be particularly careful.

Working from home does not automatically mean that a percentage of every household expense becomes deductible.

Specific requirements apply, and the treatment can differ depending on whether you are:

• An employee
• A sole proprietor
• Running another form of business

The nature and use of the workspace are important.

If you intend claiming home-office expenses, check that you satisfy the applicable requirements and keep proper supporting records.

17. Bad Debts

Sometimes a customer simply does not pay.

In appropriate circumstances, a debt that has genuinely become bad may potentially qualify for tax treatment under the applicable provisions.

However, a customer merely being late is not necessarily the same as the debt being bad.

Keep records of:

• The original invoice
• Collection attempts
• Correspondence
• The reason the debt is considered irrecoverable

Bad-debt treatment should be considered carefully rather than simply writing off overdue accounts to reduce profit.

What Expenses Generally Require Extra Caution?

Certain expenses commonly create problems because they are private, capital or specifically restricted.

Examples requiring careful consideration include:

• Private household expenses
• Personal groceries
• Family holidays
• Private clothing
• Personal entertainment
• Income-tax payments
• Certain fines and penalties
• Capital assets
• Private portions of mixed-use expenses
• Drawings by a sole proprietor
• Loan repayments
• Expenses without supporting evidence

The business paying for something does not determine whether it is deductible.

The nature and purpose of the expenditure determine the tax treatment.

Entertainment Expenses Can Be Tricky

Meals, client entertainment and hospitality are frequently misunderstood.

A business owner may assume that taking a client to lunch automatically creates a tax deduction.

South African tax law contains specific restrictions relating to entertainment expenditure.

The circumstances therefore need to be considered rather than applying a blanket rule that all client entertainment is deductible.

Keep the receipt and record the business purpose, but don’t assume deductibility solely because a client was present.

Personal Expenses Paid Through the Business

This is a particularly important bookkeeping issue for owner-managed businesses.

Suppose the business bank account pays:

Owner’s home electricity: R3,000

Entering this transaction into accounting software under “Electricity Expense” does not transform a private cost into a deductible business expense.

It may instead need to be treated as a drawing, loan-account transaction, remuneration or another appropriate classification depending on the business structure and circumstances.

Correct classification matters.

Keep Supporting Documents

A deduction should be supported.

Depending on the transaction, useful documentation can include:

• Tax invoices
• Receipts
• Supplier statements
• Contracts
• Bank statements
• Mileage records
• Logbooks
• Lease agreements
• Proof of payment
• Notes explaining the business purpose

SARS may request supporting information when verifying or auditing a return.

A line in accounting software is not necessarily sufficient evidence by itself.

Don’t Create Expenses Just to Save Tax

Spending R100 purely to save a portion of that amount in tax does not usually make financial sense.

If the business genuinely needs equipment, advertising or professional services, the tax treatment is relevant.

But unnecessary expenditure does not become a good business decision merely because it may reduce taxable income.

The objective should be:

Claim every legitimate deduction to which the business is entitled—but don’t spend money solely to manufacture deductions.

Why Expenses Matter for Provisional Tax

Suppose your business expects annual revenue of:

R2,000,000

If you ignore R800,000 of legitimate deductible expenses, your provisional taxable-income estimate could be substantially overstated.

Conversely, if you incorrectly claim R500,000 of private or capital expenditure as ordinary deductions, taxable income could be substantially understated.

Both situations create problems.

The best provisional tax estimate starts with accurate bookkeeping and correct tax classification.

Review Expenses Before Each Provisional Period

Before preparing your provisional tax estimate, review the accounts for:

• Missing expenses
• Duplicate transactions
• Personal expenses
• Capital purchases
• Incorrectly classified assets
• Loan repayments
• Mixed business/private expenses
• Stock adjustments
• Unusual once-off transactions

This is particularly important before the second provisional period because you should have substantially more complete information about the year’s financial results.

Tax Planning Is Not the Same as Artificially Reducing Profit

Good tax planning means understanding the rules, claiming legitimate deductions, structuring transactions appropriately and planning for liabilities before they arrive.

It does not mean artificially reducing taxable income.

An accurate provisional tax calculation should reflect the real economic position of the business, adjusted correctly according to the applicable tax rules.

Need Help Identifying Your Business Deductions?

Correctly identifying business expenses can make a substantial difference to your taxable-income calculation.

Boatwright Consulting can assist with bookkeeping, reviewing expense classifications, identifying potential tax adjustments and preparing provisional tax calculations based on accurate financial information.

Contact Boatwright Consulting if you are unsure which business expenses may be deductible or would like your accounting records reviewed before your next provisional tax submission.

This article provides general information and should not be regarded as tax advice specific to your individual circumstances.