Section 13quat: The Tax Incentive Behind South Africa's Inner-City Renewal
Quick answer: Section 13quat of the Income Tax Act gives an accelerated depreciation allowance on a building erected, extended or improved within a designated Urban Development Zone (UDZ), up to 25% of qualifying cost deducted in year one, with 100% recovered over 4 to 11 years depending on the category (SARS). It was introduced in 2003 to fight urban decay and has been extended to 31 March 2030.
Section 13quat is South Africa's fastest building depreciation allowance, and one of the least understood. If you own, build in, or improve a building inside one of the country's 16 designated Urban Development Zones, SARS lets you deduct up to a quarter of the qualifying cost from taxable income in the very first year, with the entire cost recovered within as little as four years. It rewards exactly the kind of private investment that turns a decaying inner city around, and unlike its better-known sibling Section 13sex, it applies to commercial buildings too, with no minimum-unit threshold to clear first.
In this article
How Much Could You Save? At a Glance
The table below shows the year-one deduction and year-one tax saving at three common marginal rates for a new building or extension, the standard category, deducted at 20% in year one then 8% per year for the following 10 years, 100% of cost recovered over 11 years.
| Qualifying Cost | Year 1 Deduction (20%) | Tax Saved at 36% | Tax Saved at 41% | Tax Saved at 45% | 11-Year Total |
|---|---|---|---|---|---|
| R1,000,000 | R200,000 | R72,000 | R82,000 | R90,000 | R1,000,000 |
| R2,000,000 | R400,000 | R144,000 | R164,000 | R180,000 | R2,000,000 |
| R5,000,000 | R1,000,000 | R360,000 | R410,000 | R450,000 | R5,000,000 |
| R10,000,000 | R2,000,000 | R720,000 | R820,000 | R900,000 | R10,000,000 |
Qualifying cost = erection/extension cost only, excluding land. Year 1 deduction = 20% × cost. Tax saving = deduction × marginal rate. 11-year total assumes the full schedule is claimed and equals 100% of qualifying cost. Improvement and low-cost categories run different, faster schedules; see the table further down. Recoupment applies on disposal; consult a registered tax practitioner before claiming.
✓ Do You Qualify? Quick Checklist
- Your building is situated within a demarcated Urban Development Zone (UDZ)
- You hold a municipal location certificate confirming this
- The building is used solely for your own trade
- The building was (or will be) brought into trade use on or before 31 March 2030
- You can support the qualifying cost with documentation (building contracts, developer specification, or the deemed-cost calculation)
What Is Section 13quat?
Section 13quat, the Urban Development Zone allowance, was introduced in 2003 to address a specific problem: South Africa's inner cities were hollowing out as businesses and residents moved to the suburbs, leaving ageing CBD buildings vacant or under-maintained. Rather than fund redevelopment directly, government chose to make private investment in these zones dramatically more tax-efficient than building the same structure anywhere else.
The mechanism deducts a portion of the building cost, never the land, from taxable income each year, exactly like Section 13sex. What sets it apart is speed: instead of a flat 5% a year for two decades, Section 13quat front-loads the deduction, 20% or 25% in the very first year, with the balance recovered over as few as three more years for some categories. On a standard new building, the entire qualifying cost is deducted within 11 years instead of 20. Use our Section 13quat Calculator to model your specific figures by category.
Who Qualifies, And Which UDZs Count?
SARS and National Treasury have demarcated 16 Urban Development Zones across 15 South African municipalities, broadly the CBD and surrounding inner-city footprint of each participating city, including Johannesburg, Cape Town, Durban (eThekwini), Tshwane and several others. Each municipality publishes its own boundary map and issues the location certificate SARS requires before it will accept a claim: the single most important document to obtain before relying on this allowance in your planning.
Beyond location, the building must be used solely for your own trade (you cannot claim on a building you neither occupy nor let out commercially), and, unlike Section 13sex, there is no minimum unit count to clear. A single qualifying commercial building, a mixed-use block, or a residential conversion can all trigger the allowance from the first qualifying rand spent, provided the location and trade-use tests are met.
Know your numbers before you commit capital. Our Section 13quat Calculator shows your annual deduction, years remaining, and total tax saving by building category.
Section 13quat Calculator →The Four Deduction Schedules
Which schedule applies depends on two questions: is the project a new build/extension or an improvement to an existing building, and does it qualify as low-cost residential? Every schedule totals exactly 100% of the qualifying cost. They differ only in how fast that 100% is front-loaded.
| Category | Year 1 | Following Years | Total Period |
|---|---|---|---|
| New building / extension | 20% | 8% per year × 10 | 11 years |
| Improvement to existing building | 20% | 20% per year × 4 | 5 years |
| Low-cost residential: new/extension | 25% | 13% × 5, then 10% in yr 7 | 7 years |
| Low-cost residential: improvement | 25% | 25% per year × 3 | 4 years |
Where only part of an existing building is extended, added to or improved (rather than the whole structure erected or improved from scratch), the improved floor area must generally be at least 1,000m² to qualify; this threshold does not apply when an entire building is erected or improved. Buying an already-improved unit from a developer after 8 November 2005 carries a further condition: the improvements must have been carried out by that developer, and where the building/land split isn't itemised, a deemed-cost formula applies instead, broadly 55% of the purchase price for new units and 30% for improvements.
Section 13quat vs Section 13sex
Both sections deduct building cost from taxable income, but they solve different problems and rarely compete for the same rand. Section 13sex applies anywhere in South Africa, but only to new residential rental units, and only once an investor holds five or more of them, at a flat 5% (or 10% for low-cost units) per year over 20 (or 10) years. Section 13quat applies only inside a demarcated UDZ, but covers commercial and residential buildings, new construction and improvements alike, with no minimum-unit threshold, at faster front-loaded rates.
For investors weighing where to deploy capital, this is a genuine strategic choice: five new residential units anywhere in the country versus one qualifying building inside a UDZ boundary. A property can potentially qualify for both if it independently meets every requirement of each section, though in practice this is uncommon, since Section 13quat's faster rates usually make it the more valuable claim where both could theoretically apply. Confirm the combined position with a registered tax practitioner rather than assuming both apply automatically.
Selling a Section 13quat property? Recoupment on disposal adds the claimed deductions back to taxable income, same as Section 13sex. Model the full CGT + recoupment position before you decide.
CGT Calculator →Common Mistakes When Claiming
Confusing 13quat with 13quin. These are two different provisions with similar-sounding Latin ordinal names. Section 13quin is a broader commercial-building allowance (5% per year over 20 years) with no UDZ location requirement at all, a completely separate section. Google will even suggest "did you mean 13quin" when you search for 13quat, which tells you how often the two get mixed up. Confirm which section actually applies to your specific building before relying on either.
Assuming any inner-city address qualifies. "Downtown" and "demarcated UDZ" are not the same thing. The zones have specific, published boundaries, and a building two streets outside the line gets nothing. Get the municipal location certificate before you factor this allowance into an acquisition decision, not after transfer.
Missing the 1,000m² partial-improvement threshold. A smaller renovation to part of an existing building can fall short of the floor-area minimum and simply not qualify, even though a full-building improvement of the same rand value would. Check which side of that line your specific project falls on before budgeting the allowance in.
Not retaining documentation. SARS can query the basis for a Section 13quat claim years after it was first made. Keep the location certificate, cost documentation and proof of trade use for the full deduction period and beyond: the same discipline Section 13sex claimants need, and just as easy to neglect.