· Built around the Rent increase calculator
Photo: Jakub Zerdzicki on Pexels (free licence)
Your landlord or agent has sent the new rent for the next lease. Is it reasonable? There is no legal percentage to hold it against, so the useful questions are: how much is it in rand, and how far is it above inflation?
Check your increase
Type your current monthly rent and the new one into the rent increase calculator:
The example: R10 260 - R9 500 = R760 a month, and R760 / R9 500 x 100 = 8.00%. Over a 12-month lease that is R9 120 more. Stats SA's headline inflation was 4.5% for September 2026, and R9 500 grown by 4.5% is R9 927.50 - so the increase is R332.50 a month above inflation, a real increase of 3.35%.
What the law says
- No cap: the Rental Housing Act 50 of 1999 does not set a maximum increase.
- It must be in the lease: a written lease must state the rent and any reasonable escalation. An increase during a fixed-term lease that the lease does not allow for is something to query.
- Unfair practices: a provincial Rental Housing Tribunal can hear a complaint about an exploitative rent as an unfair practice. It is free to lay a complaint.
- Business premises are not covered by the Act - the escalation is whatever the lease says.
Using the number to negotiate
An increase near CPI is hard to argue with; one well above it is worth a conversation, especially if you have paid on time and the landlord would face an empty month and agent fees to replace you. Show the rand difference: "8% is R760 a month; CPI would be R427.50". If you are deciding whether to stay, compare a few years ahead with the rent escalation calculator, check what you can carry with rent affordability, and see whether buying is closer than you think with rent or buy. Moving out? Your rental deposit comes back with interest.
We could not find an official statistic for typical residential lease escalations in South Africa, so this post compares with headline CPI only.
Sources
- Headline CPI 4.5% year on year, September 2026: Stats SA, Consumer Price Index P0141, September 2026 (released 21 October 2026).
- Lease must state the rent and any reasonable escalation; no maximum; Rental Housing Tribunals and unfair practices: Rental Housing Act 50 of 1999 (as amended), as summarised on CalcSA's rent escalation calculator. Amendments not re-checked for this post.
- Worked example: CalcSA, percentage change = (new - old) / old x 100; checked in PowerShell.
Calculators used in this post
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