About CalcLoan
Free loan calculators and tools built specifically for South African borrowers. Transparent methodology, plain language, and rates refreshed after every SARB MPC announcement — with everything you type staying on your own device.
What CalcLoan does
Sometimes you just need to know what a loan will actually cost you — not after filling out seventeen forms, but right now while you're thinking about it. CalcLoan gives you instant answers for bonds, personal loans, car finance, student loans, and business loans.
You can also explore scenarios: What if I pay an extra R500 per month? What happens if I get a better rate from another bank? How much do I save by choosing a 15-year term over 20? Every calculator uses the same reducing-balance formula your bank uses, the explanations are plain English, and everything works on your phone — even offline.
Beyond the five loan calculators, the tools section covers extra-payment optimisation, affordability, rate-cap checking, and side-by-side comparisons, while insights tracks the SARB prime rate, repayment history, and SA credit statistics over time.
Your numbers stay yours
Everything you enter — loan amounts, salary, repayments — is calculated in your browser and never sent to us. There is no sign-up, no cookies, and no tracking of individuals; we only see anonymous page-view counts. Read the full privacy policy and our affiliate disclosure for the details.
How we calculate
All repayment calculations use the standard reducing-balance Amortisation formula used by South African banks:
- M = monthly payment
- P = principal (loan amount minus deposit)
- r = monthly interest rate (annual rate ÷ 12)
- n = number of monthly payments (term in years × 12)
This is the same formula used by all major South African banks for bond, personal loan, vehicle finance, and business loan repayments. Results are estimates — your bank may include initiation fees, service charges, or credit life insurance that affect your actual monthly obligation.
Data sources
SARB prime lending rate
Current rate: 10.5% (as of July 2026). Updated after each SARB Monetary Policy Committee meeting (~6× per year).
SARB MPC statements →Interest rate ranges
Typical rates per loan type are indicative market ranges (under re-verification), bounded by the NCA Regulation 42 rate caps, which are derived directly from the statute.
NCR credit statistics
Consumer credit book, average balances, and arrears rates from the National Credit Regulator quarterly report (Q2 2025).
NCR reports →Rate history
Full SARB prime rate history from 2016 to present, updated after each MPC announcement.
View prime rate history →Frequently asked questions
Spotted something wrong or missing? Please let us know — accuracy reports go straight to the top of the fix list.
Ready to calculate your loan payments?
Try our calculators to see what different loans will actually cost you each month.