Do not compare the new instalment against nothing. Add up what you currently pay across every store card, personal loan and overdraft, then compare that total against the consolidated instalment and, more importantly, against the consolidated total cost. A lower monthly payment achieved by stretching five short debts into one long one can easily cost more in the end, even at a lower interest rate.

Commission earners, freelancers and small business owners should base the instalment on a poor month rather than an average one, because the debit order arrives whether the work did or not. Lenders assess self-employed applicants on documented income, usually six months of bank statements and recent financial statements, so the figure they use will be conservative too.

A damaged record does not always mean a decline, but it does mean a higher rate, so calculate near the legal ceiling rather than at the friendly end of the range. Request your free bureau report first and check for settled accounts still showing a balance or judgments that should have lapsed, because disputes take weeks to resolve.

On a few thousand rand over a few months, a once-off initiation fee dominates the annual percentage rate and makes the loan look catastrophic in percentage terms even when the rand cost is modest. Compare small, short loans on total rand cost instead, and check whether short-term credit rules rather than personal loan rules apply to the agreement.

Your existing commitments are subtracted before a lender decides what you can service, so a vehicle instalment, a store account and a credit card limit all reduce the amount you will be approved for. Enter the loan you want, then check that the new instalment plus everything you already pay still leaves a comfortable margin against your net income.

If a bonus or a sale will let you clear the balance ahead of schedule, the standard total repayable overstates what you will pay, because interest stops accruing on capital you have already returned. The National Credit Act gives you the right to settle at any time, and your provider must supply a settlement quotation on request.

The rate you are quoted has almost nothing to do with the lender you approach and almost everything to do with what your file says about you.

Every rate in South Africa starts from the repo rate set by the Reserve Bank's Monetary Policy Committee. On unsecured personal loans the National Credit Act caps the annual interest at the repo rate plus twenty-one percentage points, and credit providers price each applicant somewhere below that ceiling. Nothing about the loan itself moves you up or down the band; the loan is unsecured, so there is no asset to reduce the lender's risk.

What moves you is evidence. A long, clean repayment history, a stable employer, an income that matches your bank statements and modest existing commitments all push the quoted rate toward the lower end. Missed payments, a thin file, irregular deposits or several recent credit enquiries push it upward, and on a large loan a two-point difference is worth many thousands of rand across the term.

This is why running the calculator at a single optimistic rate is a mistake. Test the same loan at a good rate, a likely rate and a poor one before you apply, and let the worst of the three decide whether the amount is sensible. If only the best case is affordable, the answer is a smaller loan rather than a longer term.