Tax and SARS knowledge base
What expenses can a sole proprietor deduct from business income?
What expenses can a sole proprietor deduct from business income?
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Direct answer
A sole proprietor can claim certain expenses relating to the production of trade income, but not every amount spent by a business owner is deductible. SARS directs trade taxpayers to the general deduction rule in section 11(a), and it requires supporting documents for return entries. The practical test is to identify the purpose, timing, nature and private use of each cost, then retain evidence and a clear calculation.
A receipt proves that money was spent. It does not prove that the cost was incurred in producing income, was not capital in nature, belongs to the relevant period, or has no private component. Build the tax schedule from records, not from a bank feed category.
What this means in practice
Keep a ledger for each expense with the supplier, date, description, amount, payment reference and business purpose. Add a short note while the purpose is still clear. Match the ledger to invoices, bank statements, card records and contracts. If a supplier invoice includes both personal and business items, identify each line rather than claiming the total.
Separate recurring operating costs from costs that create, improve or acquire an asset or enduring benefit. Do not assume the treatment of a laptop, vehicle, renovation, deposit, professional fee or once-off setup payment from its everyday business label. The tax treatment can depend on the exact facts and separate rules. Retain the invoice, agreement and dates so the issue can be assessed properly.
Be especially careful with mixed-use expenses. Telephone, data, fuel, rent, electricity, vehicle costs and travel can have both business and private components. SARS's ITR12 guide says the personal portion of dual-purpose expenditure is not deductible and that allocations must be reasonable, with calculations retained for five years. A single arbitrary percentage used every year is weak evidence unless it reflects documented use.
Do not wait until filing season to reconstruct costs. Keep invoices electronically, reconcile monthly, and create a record of cash purchases. If there is no invoice, retain other credible evidence and record why the payment was necessary. Never manufacture a receipt or claim an estimate as an actual expense.
Step-by-step
- Build a documented ledger.
Record supplier, date, invoice, amount, business purpose and payment method for each cost.
- Test the connection to income.
Ask how the expense served the actual trade. Keep contracts, job files or customer records that corroborate the answer.
- Identify private or mixed use.
Exclude the private portion and document a reasonable allocation for the balance.
- Flag capital and unusual items.
Keep full purchase and financing documents. Obtain advice before treating a large asset or improvement as an ordinary expense.
- Reconcile before filing.
Match the ledger to bank statements, accounting records and the ITR12 totals. Investigate unexplained differences.
- Retain the completed file.
Keep invoices, workings, financial statements, submitted return and assessment for the required period.
Documents and records to keep
- Supplier invoices, contracts, proof of payment and business-purpose notes.
- Bank statements, card statements, cashbook and monthly reconciliations.
- Asset registers, financing agreements and repair records.
- Travel, telephone, data and other mixed-use allocation workings.
- Financial statements, ITR12 and SARS assessment.
Important limits and exceptions
This is not a list of guaranteed deductions or a calculation of taxable profit. Deductibility can depend on the nature of the trade, the particular cost, statutory limitations, timing, capital treatment and related evidence. Do not claim private household costs, personal consumption, fines, unsupported estimates or an expense merely because another business owner claimed it.
An expense can be genuinely useful to a business and still need a different tax treatment. Seek advice where the amount is material, unusual or tied to an asset, property, vehicle, employee or related party.
When to get tailored advice
Get advice for start-up costs, assets, vehicles, home-office claims, travel, related-party payments, losses or mixed-use premises. TaxProof can structure the ledger and supporting schedule for a professional review.