A rate calculation tells you one thing. Here is what it does and does not establish, and who to take it to.
Working out that a rate sits above the Regulation 42 cap is a useful starting point and not a conclusion. What follows depends on the agreement, the lender and your circumstances, and it is worth understanding the difference before acting.
Start with the lender. A written query citing the agreement date and the applicable cap sometimes resolves a genuine error without going further.
If that fails, the National Credit Regulator handles complaints about registered credit providers and maintains the register of who is licensed. If the lender is not registered at all, that is itself a matter for the NCR and does not depend on the rate.
The National Credit Tribunal hears matters the regulator refers, and a debt counsellor or attorney can advise on your specific agreement. If you are struggling to pay rather than disputing the rate, debt counselling is a separate route worth knowing about.
Being over the interest cap is one issue. It does not by itself decide what a court would order, and it is not the same as reckless lending, which also covers whether the lender assessed affordability and whether you understood the agreement.
Equally, an agreement within the cap can still be unlawful for other reasons: fees above their own limits, in duplum breaches, or an affordability assessment that never happened.
Nothing here is legal advice. It is a description of how the rate cap works and where to take a concern.
These pages explain the rule. Applying it to a real agreement means knowing the repo rate in force on the day it was concluded, which is what verza's API does: give it the credit type, the rate charged and the conclusion date, and it returns a lawful or unlawful verdict with the exact cap, any excess and the full workings.
See how the check worksThe maximum legal interest rate in South AfricaThe date you signed is what sets your limitWhat a short-term lender may legally charge