Money · 2026-09-04 · 6 min read

Rent escalation in South Africa: fixed percentage, CPI, and what your lease actually allows

How annual rent increases work in SA residential leases — fixed-percentage vs CPI-linked escalations, what Stats SA's headline CPI is, and how to calculate the new rent without a dispute.

Every South African residential lease worth signing says what happens to the rent at the anniversary. Most say one of two things: a fixed percentage ("the rental shall escalate by 8% per annum") or a CPI-linked increase ("in line with the Consumer Price Index as published by Statistics South Africa"). A surprising number of leases say nothing at all, and that is where the arguments start.

The escalation clause decides, not the landlord

An increase is only enforceable if the lease provides for it. If your lease has an escalation clause, the increase happens on the anniversary by the stated method, with or without a reminder. If the lease is silent, you are negotiating a new rent, and a tenant who says no is not in breach — they are simply declining a new offer. The Rental Housing Act does not set a maximum increase, and the Consumer Protection Act does not cap it either; what they require is that the terms were agreed and are not unfair.

Practical rule: read the clause before you write the letter. PropKeep pre-fills the escalation rate from the lease on the Escalation screen for exactly this reason.

Fixed percentage: simple, predictable, occasionally out of step

A fixed 6–10% is the most common clause in SA. It is easy to explain and easy to calculate:

New rent = current rent × (1 + percentage)

R8 500 at 8% becomes R9 180. Landlords like it because it is predictable; tenants like it because it is knowable. The risk is that it drifts away from the market — in a soft year an 8% increase can push a good tenant out, and in a hot year it under-recovers.

CPI-linked: fair in principle, fiddly in practice

A CPI clause ties the increase to inflation. The number to use is the headline CPI year-on-year figure published by Stats SA for the most recent month before the anniversary. Two points trip people up:

• "CPI + 2%" is a premium on top of inflation, not a total. If CPI is 4.4%, the increase is 6.4%.
• Use the published figure, not a guess. State the month and the percentage in the letter so the tenant can check it.

PropKeep asks you for the current headline CPI when a lease is CPI-linked, because the app will not invent an inflation number on your behalf.

Notice: give it early, give it in writing

Even where the clause makes the increase automatic, a written notice 30–60 days before the anniversary avoids the "I didn't know" conversation and keeps the relationship civil. The notice should state the current rent, the new rent, the method (clause reference or CPI month), and the effective date. Keep a copy.

Worked example

Round to the rand and say so in the letter.

Where this lives in PropKeep

Money → Escalation. Choose the tenant; the rate comes from their lease; enter CPI if the clause needs it; the app calculates the new rent and prepares a Rent Increase Notice PDF that cites the lease clause. Remi can walk you through it — ask "what should Pieter's rent be from November?"