Keep business expenses visible in your project costs
A 12 mยฒ qualifying office in a 120 mยฒ home represents 10% of the floor area. If eligible annual premises costs total R156,000, the illustrative apportioned expense is R15,600. At an assumed marginal income tax rate of 26%, that could reduce tax by R4,056โnot produce a R15,600 refund.
The calculation is the easy part. First you need to establish whether the room, your work arrangement and the expenses qualify. This guide focuses on personal home-office claims in South Africa, with clear distinctions between employees and people carrying on a business. The examples are hypothetical and use rules checked on 7 October 2026.
Who can claim home office expenses?
The SARS home-office guidance requires a specifically equipped area used regularly and exclusively for trade. For employees earning ordinary salary, duties must mainly be performed there, meaning more than 50%. Where more than 50% of remuneration is commission or performance-based variable pay, more than 50% of duties must be performed away from an employer-provided office; the dedicated-space conditions still apply.
A laptop at the kitchen table does not establish a qualifying office simply because you answered work emails there. The important questions are what the space is used for, how it is equipped and how your duties are actually performed. Separate those factual questions from the size of the possible claim.
For example, an employee who works three days each week in a dedicated room needs to assess the actual duties and arrangement over the relevant period. Three days is not automatically proof if the work pattern changes, and a dedicated-looking room is not enough if it also functions as a guest bedroom.
People carrying on a trade outside ordinary employment also need to consider the applicable deduction rules and the prohibition on private expenses. This article does not treat every freelancer's purchase as deductible. Establish the taxpayer, the trade and the business connection before moving to amounts. A registered tax practitioner can assess a mixed or unusual arrangement.
Does the room meet the exclusive-use requirement?
Describe how the room is used on an ordinary day and when work is finished. A dedicated working space is a different factual situation from a bedroom used for both sleeping and occasional administration. The ability to measure an area does not, by itself, make that area eligible.
Ask whether household activities, storage and visitors also use the space. A photograph showing a desk helps describe the room, but it does not show how it was used throughout the year. Keep the explanation consistent with the floor plan, employment arrangement and evidence of working time.
You also need to distinguish a business room from the whole household. If one office occupies 10% of the home, that does not turn 10% of every household purchase into a work expense. Groceries, family holidays and private clothing do not become premises costs because you work from home.
Before buying furniture or renovating purely for a deduction, remember the basic economics. Spending R10,000 to obtain an assumed R2,600 tax reduction still leaves a R7,400 cost. The deduction may also be disallowed if its conditions are not met. A tax consequence is one part of a genuine working-space decision, not a refund of the purchase price.
How do you calculate the floor-area share?
The premises calculation is qualifying office area divided by total residence area, multiplied by eligible costs. Use consistent measurements and include relevant outbuildings in the total. In our example, 12 รท 120 = 0.10, or 10%.
Assume the taxpayer meets the eligibility conditions, rents the residence, uses the office for the full year and personally incurs the expenses below. We assume each listed cost is an eligible premises expense in these particular circumstances. We are not adding equipment, internet or capital improvements to this floor-area calculation.
| Assumed qualifying premises expense | Annual cost | Office share at 10% |
|---|---|---|
| Rent | R120,000 | R12,000 |
| Electricity | R24,000 | R2,400 |
| Cleaning of premises | R12,000 | R1,200 |
| Total | R156,000 | R15,600 |
Rent is R10,000 a month ร 12 = R120,000. Electricity is R2,000 ร 12 = R24,000. Cleaning is R1,000 ร 12 = R12,000. Together, R120,000 + R24,000 + R12,000 = R156,000. The office share is R156,000 ร 10% = R15,600.
Keep the period consistent too. If the qualifying arrangement exists for only part of the year, do not automatically claim twelve months of costs. Establish the relevant dates and expenses incurred during that period. If the room changes size or use, record the change rather than applying the most favourable percentage to the whole year.
Which costs need a different treatment?
Premises costs and movable equipment are not the same category. A laptop or chair may require a wear-and-tear calculation rather than an immediate full purchase-price deduction. A capital improvement is also different from an ordinary repair. The invoice description and actual work performed matter.
For employees, consult SARS's furniture, Wi-Fi and beverages FAQ which distinguishes qualifying equipment wear-and-tear from other Wi-Fi costs and beverages that are not allowed as employee home-office deductions. Employee restrictions can differ from the treatment of expenses incurred in carrying on an independent business. Do not apply a freelancer's expense list to an employee without checking that distinction.
SARS states that employees and office holders can no longer deduct mortgage interest as home-office expenditure from the 2023 tax year. The principal portion of a bond instalment is not a deductible expense either. An old example that apportions a whole bond repayment therefore cannot be carried into this claim.
For a company owner, establish whether a cost was personally incurred, reimbursed by the company or paid by the company under a documented arrangement. A personal home-office claim and a company's expense cannot simply duplicate one payment. Keep the bank transaction, invoice and explanation together so the treatment can be reviewed.
How much tax could a deduction actually save?
A deduction reduces taxable income; a tax credit reduces tax under its own rules; a refund is the result of the final reconciliation with payments already made. Calling all three a refund can make a home-office claim look far more valuable than it is.
Use the R15,600 expense example. If the entire deduction falls within an assumed 26% marginal bracket, the tax reduction is R15,600 ร 26% = R4,056. At an assumed 31%, it would be R4,836. Those are scenario calculations, not guarantees that either rate applies to your return.
If the deduction spans brackets, calculate tax before and after the deduction instead of applying one percentage to all of it. If your tax is already reduced to zero under the relevant rules, a deduction does not automatically create a cash payment from SARS. The value depends on the wider tax position.
There is also a difference between receiving a deduction and receiving a refund this year. If PAYE or provisional payments were below the final liability, the deduction might reduce an amount still payable. Keep the expected assessment result separate from the tax saving attributable to the expense, and do not commit spending against an unconfirmed refund.
What records should support the claim?
Build the record while you work rather than recreating it when verification arrives. Keep measurements, a floor plan, photographs, invoices, payment evidence and a written calculation. For employment, keep evidence of the home-working arrangement and duties performed. SARS lists supporting documents for home-office claims.
A practical calculation sheet starts with the total residence area and qualifying area, then lists each expense, its date, amount and treatment. It should be possible to trace R24,000 of electricity back to underlying records rather than seeing only a round estimate. If you use prepaid electricity, retain vouchers and payment records.
If an invoice combines work and private items, identify the work portion and explain the split. If another household member paid an expense, establish who actually incurred it before claiming. Shared bills are not automatically deductible in full by everyone who lives in the property.
For eFiling, SARS identifies home-office expenses under the applicable Other Deductions section and source code 4028 for a qualifying personal claim. Follow the current return questions for your circumstances. Preserve your supporting calculation even where the form asks only for a total; entering a number does not prove its eligibility.
What should homeowners consider before claiming?
Home-office use can affect the capital gains tax treatment of a later property sale. The relevant trade portion and period of use must be considered. Do not assume that a residence used partly for business receives the same treatment as one used wholly for private residence purposes.
For an illustration of the factual issue, suppose a home contains a 10% office and the office is used for business for five years of a ten-year ownership period. Both area and time become relevant to the adviser reviewing a later gain. Multiplying those percentages is not, by itself, a complete CGT calculation or a reliable tax bill.
Keep the start and end dates of trade use, changes to the room and records of property costs. These can matter long after a particular income tax return is filed. A claim decision based only on this year's R4,056 illustrative saving leaves out the wider property position.
The SARS interpretation note on home-office deductions provides more technical detail. Use an adviser for mixed employment and business use, company arrangements, renovations or an upcoming sale.
The useful order is eligibility first, permitted expenses second, calculation third and wider consequences last. A room measurement can help calculate a claim once it qualifies. It cannot make an otherwise private room deductible. Working through that order produces a claim you can explain, rather than a large figure that falls apart when supporting documents are requested.
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No. SARS requires a specifically equipped area used regularly and exclusively for trade. Salaried employees must also meet the mainly-performed-at-home duties test. Different conditions apply to qualifying commission-based employees.
Divide the qualifying office area by the total residence area, including relevant outbuildings, and multiply by 100. A 12 mยฒ office in a 120 mยฒ residence gives 10%. Apply that percentage only to eligible premises costs.
No. Repaying capital is not a home-office expense deduction. SARS also states that mortgage interest is no longer deductible as a home-office expense for employees or office holders from the 2023 tax year.
No. A deduction reduces taxable income. At an assumed marginal rate of 26%, a qualifying R15,600 deduction would reduce income tax by R4,056 if the whole deduction falls in that bracket. The assessed refund depends on the full return and tax already paid.
Yes. Trade use can affect the primary-residence CGT treatment. The calculation depends on the relevant area, period of use and other facts. Obtain advice before assuming annual deductions have no future consequence.
No. A company, an employee director and a sole proprietor are different taxpayers. Personal expenses, company reimbursements and business deductions need their own treatment and records. Do not claim the same cost twice.