An interest rate decision reaches a small business in two ways: what you pay on variable-rate borrowing, and what your customers can afford. The second usually matters more, because consumer demand responds to debt costs well before your own repayments change materially.
Understanding the mechanism tells you what to watch and when.
The rate feeds into what you pay
The repo rate sets the base from which lending rates are built, so a change moves variable-rate facilities, overdrafts and most business loans, usually within weeks.
Know which of your facilities are variable and what a change costs you monthly. A business heavily exposed to variable debt should be running that calculation before each decision, not after.
Customer demand moves first and further
Households with bonds, vehicle finance and credit feel rate changes immediately, and discretionary spending responds. For consumer-facing businesses that effect is usually larger than the direct cost of your own borrowing.
It also affects payment behaviour: in a tightening cycle, customers pay later. Watching your debtor days is how you see it arriving.
Why rates hold when the economy is weak
Rates are set against an inflation target rather than against growth alone, so a weak economy with inflation pressure or currency weakness can still produce a hold or an increase.
That is why expecting cuts because conditions are difficult is a poor basis for planning. The decision framework is published by the South African Reserve Bank, and the inflation detail that drives it by Statistics South Africa.
What to actually do
Know your exposure and model a rate change in both directions. Consider fixing where certainty matters more than the lowest possible rate, particularly on a facility you cannot quickly repay.
Reduce reliance on variable debt where the business can fund itself instead: collecting faster, taking deposits and clearing slow stock all produce cash without interest.
Frequently asked questions
How does a rate change reach my business?
Through variable-rate facilities within weeks, and through customer spending power, which usually matters more.
Which effect is larger?
For consumer-facing businesses, the effect on customer demand and payment behaviour, rather than your own repayments.
Why do rates stay high when the economy is weak?
Because they are set against an inflation target rather than growth, so inflation or currency pressure can produce a hold or increase.
Should I fix my rate?
Where certainty matters more than the lowest possible rate, particularly on facilities you cannot repay quickly.
What reduces exposure without borrowing?
Collecting faster, taking deposits and clearing slow-moving stock, all of which produce cash without interest.
Further reading
Originally published in January 2018. Updated September 2026 into guidance on how interest rate decisions affect a small business.
