To claim a home office deduction in South Africa, the part of your home used for trade must be specifically equipped for that purpose and used regularly and exclusively for it. "Exclusively" is the test that disqualifies most claims — a desk in the corner of a bedroom does not qualify. The deduction is calculated by apportioning household costs on floor area.
There is also a consequence almost nobody is told about at the time: claiming a home office reduces the primary residence exclusion available when you eventually sell the house.
TL;DR
Three tests: specifically equipped · used regularly · used exclusively for trade.
Exclusively is the one that fails most claims.
Apportionment is normally on floor area.
Employees face an additional restriction under section 23(m).
Claiming creates a capital gains tax consequence on sale.
Keep photographs, a floor plan and the measurements.
The three qualifying tests
Section 23(b) of the Income Tax Act denies a deduction for domestic or private premises, except where a part of the premises is:
1. Occupied for purposes of trade, and
2. Specifically equipped for that purpose, and
3. Regularly and exclusively used for that purpose
All three must be met. Fail one and the deduction goes.
"Specifically equipped"
The space must be fitted out for the work you do. A room with a desk, chair, computer, filing and the equipment your trade requires qualifies. A dining table you clear at 17:00 does not.
"Regularly used"
Occasional or incidental use is not enough. The space must be used in the ordinary course of your work, routinely.
"Exclusively used" — the one that fails
This is strict. The space must be used only for trade purposes.
Fails: a desk in the bedroom · a corner of the lounge · a spare room that is also a guest room · a study the family uses in the evenings.
Passes: a dedicated room used only as an office · a converted garage or outbuilding used only for the business.
Partial rooms are difficult. The requirement attaches to a part of the premises, and a demarcated, exclusively used portion can in principle qualify — but it must be genuinely exclusive, and it is far harder to defend than a whole room.
The additional test for employees
If you are an employee rather than self-employed, section 23(m) restricts what you can deduct against remuneration. In broad terms, an employee earning mainly a salary can only claim a limited list of deductions.
The practical position for employees:
The home office deduction is available to employees who meet the section 23(b) tests, but
Employees earning more than 50% of their remuneration as commission are treated more favourably
For a salaried employee, SARS has historically also expected the employee to perform more than 50% of their duties in the home office
If you are an employee, get this reviewed before claiming. The rules for employees are meaningfully tighter than for the self-employed, and employee home office claims attract scrutiny.
If you are a sole proprietor or a company, the position is more straightforward — the space is used for the trade, and the ordinary section 11(a) test applies alongside section 23(b).
What you can claim, and how to apportion
Apportionment is normally on floor area: the area of the home office divided by the total floor area of the home.
Worked example. A home of 180 m² with a 15 m² dedicated office.
15 ÷ 180 = 8.33%
| Annual household cost | Total | Claim at 8.33% |
|---|---|---|
| Rent (or bond interest, not capital) | R168,000 | R13,994 |
| Rates and taxes | R21,600 | R1,799 |
| Electricity and water | R32,400 | R2,699 |
| Home insurance | R9,600 | R800 |
| Repairs to the whole property | R14,000 | R1,166 |
| Total apportioned | R20,458 |
Claimed in full, not apportioned — costs relating only to the office:
Repairs to the office itself
Office furniture and equipment (via wear and tear)
A business internet or phone line
Cleaning of the office specifically
Note what is not claimable: the capital portion of a bond repayment. Only the interest qualifies. Nor do improvements to the property, which are capital.
The capital gains consequence
This is the part that surprises people years later.
The primary residence exclusion for capital gains tax is R3 million for 2026/27, up from R2 million. But it applies only to the portion of the property used for domestic purposes.
Where part of your home has been used for trade, that portion does not qualify for the exclusion, and the gain attributable to it is subject to CGT.
Worked example. A home bought for R1.8 million and sold for R4.2 million — a R2.4 million gain. 8.33% of the property was used as an office throughout.
Gain attributable to the office portion: R2.4m × 8.33% = R199,920
That portion does not benefit from the primary residence exclusion
Included in taxable income at the individual inclusion rate, giving a maximum effective CGT rate of 18%
Roughly R35,986 of CGT
Weigh it up. Ten years of home office deductions at, say, R20,000 a year and a 31% marginal rate saves roughly R62,000 of income tax. Against a CGT cost in the region of R36,000. In this example the deduction still wins — but the margin is narrower than most people assume, and on a property with a large gain and a large office percentage it can go the other way.
Also note: the CGT event on property arises when the sale agreement is signed, not when transfer is registered at the Deeds Office.
What to keep
Home office claims are verified, and the verification asks for evidence of the tests, not just the costs.
Keep:
Photographs of the room, showing it is equipped as an office and not used for anything else
A floor plan or sketch with measurements of both the office and the total property
The calculation showing the percentage
Invoices and statements for every cost claimed
A bond statement separating interest from capital
Where you are an employee, a letter from your employer confirming you are required to work from home
Take the photographs when you set the office up, not three years later when SARS asks.
Frequently asked questions
Can I claim a home office in South Africa? Yes, if the part of your home used for trade is specifically equipped for that purpose and used regularly and exclusively for it. The exclusivity requirement is strict, and a desk in a shared room does not qualify.
How is a home office deduction calculated? Normally by apportioning household costs on floor area — the area of the office divided by the total floor area of the home. That percentage is applied to rent or bond interest, rates, electricity, insurance and general repairs. Costs relating only to the office are claimed in full.
Can I claim a home office as an employee? It is possible where the section 23(b) tests are met, but section 23(m) restricts deductions against remuneration and the position is meaningfully tighter than for the self-employed. Employees earning more than 50% of remuneration as commission are treated more favourably. Get an employee claim reviewed before submitting it.
Can I claim my bond repayment for a home office? Only the interest portion, apportioned by floor area. The capital portion of a bond repayment is not deductible, and improvements to the property are capital in nature.
Does claiming a home office affect capital gains tax when I sell? Yes. The primary residence exclusion, R3 million for 2026/27, applies only to the domestic portion of the property. The gain attributable to the portion used for trade does not qualify and is subject to CGT at a maximum effective rate of 18% for individuals.
Does a spare room that is also a guest room qualify? No. The exclusivity test requires the space to be used only for trade purposes. A room with a second function fails.
What records do I need for a home office claim? Photographs of the room showing it is equipped and exclusively used, a floor plan with measurements, the apportionment calculation, invoices and statements for the costs claimed, a bond statement separating interest from capital, and where you are an employee, a letter confirming you are required to work from home.
Is the home office deduction worth claiming? Usually yes for the self-employed, but run the numbers over the expected holding period of the property. The annual income tax saving generally exceeds the eventual CGT cost, but the margin narrows where the office percentage is large or the property gain is substantial.
Set it up right, once
Home office claims fail on evidence rather than principle — and the evidence is easy to create on day one and almost impossible to create retrospectively.
Smartbook sets up the apportionment properly, documents the basis so it survives a verification, and models the capital gains consequence before you claim rather than after you sell.
Last reviewed: 26 July 2026. Written by the Smartbook team — SAIPA and SAICA accredited, SARS registered tax practitioners. Home office claims by employees are subject to additional restrictions and are fact-specific — take advice before claiming. Worked examples are illustrative. General guidance, not advice on your circumstances.
Primary sources: SARS — Budget 2026 Frequently Asked Questions · SARS — Income Tax · SARS — Interpretation Notes · SARS — Capital Gains Tax