Loan calculator – see your monthly repayment before you borrow.
Work out what a loan really costs.
- Compare multiple loan offers
- Up to R350 000
- Loan offers right away
10 000+ South Africans have used Swiftbanker to find the right loan.
Why it matters
Run the numbers before you sign anything
A loan calculator takes the guesswork out of borrowing. Enter an amount, an interest rate and a repayment term, and it instantly shows what the loan will cost you each month and over its full life. That matters in South Africa, where interest on personal loans is regulated by the National Credit Act but still varies widely between lenders and credit profiles. Two offers for the same R100 000 can differ by hundreds of rand a month once fees and interest are included.
Before you apply, check that the instalment fits comfortably into your budget, compare the total repayment across different terms, and see how a slightly lower rate changes the picture. The calculators on this page do exactly that. They are free, they cover any amount from R5 000 to R350 000, and using them leaves no trace on your credit record.
Tool · Loan calculator
Calculate your monthly loan repayment
Drag the sliders to see the monthly instalment, the interest and the total cost of your loan. Even a small difference in the rate has a big effect over the full term.
Each bar = one month paid
The calculation is indicative and based on the annuity principle. Your personal rate is set individually by the lender based on your credit profile, within the caps of the National Credit Act.
The essentials
What a loan calculator tells you
Six things worth knowing before you compare loan offers in South Africa.
Three inputs decide everything
Your loan amount, interest rate and repayment term determine the monthly instalment, the total interest and the full cost of any loan.
Longer terms cost more overall
Stretching repayment lowers the monthly instalment, but every extra month adds interest, so the cheapest loan is usually the shortest term you can afford.
Interest rates are capped by law
The National Credit Act limits what NCR-licensed lenders may charge on personal loans, and your credit profile decides where you land within the cap.
Fees change the real cost
Initiation fees, monthly service fees and credit insurance sit on top of interest, which is why two loans with the same rate can differ.
Calculators are free and safe
Running estimates on this page costs nothing and leaves no trace on your credit record, no matter how many scenarios you test.
Comparing offers pays off
Requesting quotes from several NCR-licensed lenders through one application is the quickest way to find the lowest rate your profile qualifies for.
Behind the numbers
Six factors that drive your instalment
Every result the calculator shows is built from these inputs.
Loan amount
The size of the loan is the base every other cost is calculated from.
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The more you borrow, the higher both the monthly instalment and the total interest become. Borrow only what you actually need: an extra R20 000 taken "just in case" is charged interest every single month it is outstanding.
Interest rate
The annual price of borrowing, set by the lender within legal caps.
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Your rate is set individually based on your credit profile, income and existing debt. A strong profile can qualify for around 20% APR on an unsecured loan, while riskier profiles pay closer to the legal maximum.
Repayment term
How many months you take to repay, from 3 up to 72.
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A longer term spreads the debt over more months, so each instalment shrinks – but interest is charged for longer, so the total cost grows. The calculator shows this trade-off instantly when you move the term slider.
Initiation fee
A once-off fee lenders may charge for setting up the credit agreement.
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The National Credit Act caps the initiation fee on a personal loan at R1 050 excluding VAT. Some lenders add it to the loan balance, which means you also pay interest on the fee itself.
Monthly service fee
A recurring admin fee added to every single instalment.
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Regulation caps the service fee at R60 per month excluding VAT. It sounds small, but over a 72-month loan it adds up to several thousand rand, which is why the APR matters more than the headline rate.
Credit life insurance
Cover that settles the debt if you die, are disabled or retrenched.
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Lenders may require credit life insurance on unsecured loans, and its premium raises your monthly cost. You are entitled to shop around and substitute your own policy, which can make a meaningful difference on larger loans.
Jacob Hartmann
Jacob's rule for calculators is simple: the number must be honest even when it is unflattering. He has verified that this one shows the total cost of credit and not only the monthly figure.
The legal framework
How interest is capped in SA
South African personal loans are governed by the National Credit Act, which sets a legal ceiling on the interest rate every registered lender may charge.
For unsecured personal loans, the maximum rate is linked to the South African Reserve Bank's repo rate: the cap is calculated as the repo rate plus 21 percentage points per year. When the repo rate moves, the ceiling moves with it. No NCR-licensed lender may quote you a rate above that ceiling, regardless of your credit profile.
Where you land underneath the cap is individual. Lenders score your income, your existing debt and your repayment history, and price the loan accordingly. Strong profiles are offered rates well below the maximum, which is exactly why comparing several offers is worth the effort.
Fees are regulated too: the once-off initiation fee and the monthly service fee both have legal maximums, and compulsory insurance must be disclosed. When you use the calculator, enter the full quoted APR rather than a bare interest rate – that is the number that captures what the loan truly costs.
Quick facts
Loan maths worth knowing
Small details that change how you read a loan offer.
- Did you know? 01
Early instalments are interest-heavy
Your first payments mostly cover interest, not debt.
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On an annuity loan every instalment is the same size, but its composition shifts over time. In the early months most of the payment is interest; only later does the majority start reducing the actual debt you owe.
- Did you know? 02
Every legal lender is NCR-registered
Registration is a legal requirement, not a badge.
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Any business that lends money in South Africa must register with the National Credit Regulator. Before accepting an offer, you can verify a lender's registration number on the NCR's public register – unregistered lending is illegal.
- Did you know? 03
The initiation fee is capped
Setup costs on a personal loan have a legal maximum.
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A lender may charge a once-off initiation fee of at most R1 050 excluding VAT on a personal loan. If it is financed into the loan rather than paid upfront, you pay interest on it too.
- Did you know? 04
Service fees compound quietly
R60 a month becomes thousands over a long term.
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The monthly service fee is capped at R60 excluding VAT, but over 72 months that is more than R4 300 before interest. Shorter terms do not just save interest – they save fees as well.
- Did you know? 05
Amortisation means shrinking debt
Each instalment leaves slightly less debt than before.
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Amortisation is the gradual repayment of a loan through equal instalments. Because the outstanding balance falls each month, the interest portion falls with it, and the debt reduction accelerates towards the end of the term.
- Did you know? 06
You may settle early
Paying a personal loan off ahead of time is your right.
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Under the National Credit Act you may settle most personal credit agreements early, and for small and intermediate agreements no early-settlement penalty applies. Paying extra when you can shortens the term and cuts total interest.
The key term
APR.
Annual Percentage Rate – the full yearly cost of a loan, interest plus compulsory fees, expressed as one comparable number.
APR is the number that makes loan offers comparable. Where a headline interest rate only tells you the price of the borrowed money itself, the APR folds in the compulsory extras – the initiation fee, the monthly service fee and any required credit insurance – and expresses the whole package as a single annual percentage. Two loans with identical interest rates can carry very different APRs once those costs are counted.
When you compare offers for the same amount over the same term, the lower APR is the cheaper loan. That is why our calculators work with the APR and why the representative example on this page quotes one. Always ask a lender for the APR in writing before you sign, and feed that figure into the calculator to see the honest monthly cost.
Tool · Consolidation
Calculate the effect of consolidating your debts
Add your current debts and compare them with a single consolidation loan. Several expensive credits are rarely cheaper than one loan at a lower rate.
Your current debts
Add and adjust freely – the calculation updates instantly.
Proposal: one consolidation loan
Enter the consolidation loan you are considering.
The calculation is indicative. A longer term can lower the monthly payment but increase the total cost of the loan.
Plan before you sign
Know the full cost before you apply
A loan is a monthly commitment, not a once-off decision. Five minutes with a calculator shows you the instalment, the total interest and the price of stretching the term – knowledge that puts you in a stronger position with every lender.
Step by step
How to use the loan calculator
Six short steps take you from a rough idea to a realistic repayment plan you can hold offers up against.
Choose your loan amount
Set the slider to the amount you actually need, from R5 000 to R350 000.
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Be honest here rather than optimistic. Borrowing more than you need inflates every later number, while borrowing too little may force a second, more expensive loan. If the money is for a specific purchase, add realistic delivery or installation costs so one loan covers everything.
Set the repayment term
Pick a term between 3 and 72 months and watch the instalment change.
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The term is your main lever. Slide it shorter and the instalment rises while total interest falls; slide it longer and the opposite happens. A good starting point is the shortest term whose instalment still leaves comfortable room in your monthly budget after essentials.
Adjust the interest rate
Enter the APR you have been quoted, or test a realistic range.
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If you already have a quote, use its APR so fees are included. If not, test the calculation at both 20% and 27,5% – roughly the span between a strong credit profile and the maximum in our comparison – to see your best and worst case before offers arrive.
Read the results
Review the monthly instalment, total interest and total repayable.
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Three numbers matter. The instalment must fit your budget every single month, the total interest shows the price of borrowing, and the total repayable is what the loan really costs. If the instalment only just fits, consider a smaller amount or longer term.
Test alternative scenarios
Change one input at a time and compare the outcomes side by side.
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Try the same amount over 36, 48 and 60 months, or the same term at two different rates. Writing the totals down makes the trade-offs concrete, and you will quickly see which combination delivers an affordable instalment at the lowest overall cost.
Compare real offers
Send one free application and hold the offers against your calculation.
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Once you know your target numbers, submit the non-binding application on this page. You receive offers from multiple NCR-licensed lenders, and because you already know what a good deal looks like for your budget, choosing between them takes minutes rather than days.
About Swiftbanker
An independent comparison service
Swiftbanker is an independent, free comparison service – we are not a lender and we never issue credit ourselves. When you send an application through this page, it is processed via our partner Myloan.co.za, one of South Africa's leading loan marketplaces. Myloan.co.za matches your application with NCR-licensed lenders that fit your profile, and those lenders respond with concrete, personalised offers. You compare the offers side by side and decide, in your own time, whether to accept one – or none at all. The application is free and non-binding from start to finish. Swiftbanker earns a commission from loans that are paid out, which is how we keep the service free; it never adds anything to the price of your loan. Our calculators, guides and comparisons exist for one reason: so you understand exactly what a loan costs before you commit to it.
Weigh it up
Is a longer repayment term worth it?
The term slider is where most borrowers hesitate. Here is the honest trade-off between stretching your loan and keeping it short.
Advantages
- Lower monthly instalment.
Spreading R100 000 over 72 months instead of 36 roughly halves the instalment, which can be the difference between comfortable and strained.
- Easier approval odds.
Lenders test whether the instalment fits your disposable income. A smaller instalment passes the affordability assessment more easily.
- Breathing room for surprises.
A modest instalment leaves margin for emergencies, school fees or rate hikes, reducing the risk of missed payments and penalties.
- You can still settle early.
A long term is a ceiling, not a sentence. Pay extra whenever you can and the loan ends sooner at lower total cost.
Drawbacks
- More interest overall.
Interest is charged on the outstanding balance every month, so more months always means a higher total price for the same loan.
- More months of service fees.
The monthly service fee is charged for the full life of the loan – 72 instalments carry twice the fees of 36.
- Slower debt reduction.
With a long term the balance falls slowly at first, which limits your flexibility if you want to refinance or borrow again.
- Longer financial commitment.
Six years is a long time to promise the same payment. Job changes and family plans are harder to absorb mid-loan.
Amortisation
How your instalment is split over time
Early payments favour interest
In the first months of an annuity loan, the outstanding balance is at its largest, so the interest charge is too. A big share of each early instalment goes to interest, and only the remainder reduces the debt itself.
The tipping point
As the balance shrinks, the interest portion of every instalment shrinks with it. Somewhere past the middle of the term, the scales tip: from then on, most of each payment goes towards clearing the actual debt.
Extra payments punch above their weight
Any extra amount you pay goes straight at the outstanding balance. Because all future interest is calculated on that balance, one additional payment early in the term removes far more interest than the same amount paid later.
The final stretch
Towards the end of the term the interest portion becomes almost negligible, and the debt falls quickly. This is why settling a loan in its final months saves little – the interest you would avoid has mostly been paid already.
Tool · Affordability
See how much you could borrow
Enter your household income and costs and get an indicative estimate of the loan size your budget can carry. Lenders run a similar affordability assessment under the National Credit Act before making any offer, so a realistic picture here saves you surprises later.
Likelihood of approval
The calculation is indicative. Every NCR-licensed lender performs its own affordability assessment of your income, expenses and credit history before making an offer.
Watch out
Costs that quietly inflate a loan
The calculator shows the mathematics – but a few common traps can push the real cost above what you calculated. Check your offer for these before signing.
- Credit life insurance priced high. Cover may be required, but you can substitute a cheaper policy of your own – compare the premium before accepting the lender's default.
- Financed initiation fees. When the setup fee is added to the balance instead of paid upfront, you pay interest on the fee for the entire term.
- Optional add-ons ticked by default. Payment holidays, card protection and bundled extras raise the instalment – untick anything you did not actively choose.
- Late payment penalties. One missed instalment triggers penalty fees and can mark your credit record, making every future loan more expensive than this one.
- Rolling over short-term loans. Repeatedly extending a small loan multiplies fees until the debt dwarfs the original amount – a consolidation loan is usually cheaper.
- Accepting the first offer. Rates vary widely between lenders for the same profile – comparing several offers routinely saves thousands over a full term.
FAQ
Frequently asked questions about loan calculators
Short, straight answers to the questions South Africans ask most about calculating loan costs.
How accurate is the loan calculator?
It uses the standard annuity formula that lenders themselves use, so the mathematics is exact for the inputs you give. Your actual offer can still differ, because each lender sets your rate individually after assessing your credit profile and affordability.
What interest rate should I enter?
Use the APR from a written quote if you have one, since it includes compulsory fees. If you have no quote yet, test both 20% and 27,5% to bracket the realistic range for unsecured personal loans from NCR-licensed lenders.
How does the interest rate change my instalment?
A higher rate increases both the monthly instalment and the total interest paid; a lower one reduces both. On R100 000 over 60 months, a few percentage points' difference amounts to thousands of rand over the term.
What is the maximum rate on a personal loan in South Africa?
The National Credit Act caps unsecured personal loan interest at the repo rate plus 21 percentage points per year. The cap therefore moves with the repo rate, and no registered lender may exceed it.
Does using the calculator affect my credit score?
No. The calculators run entirely on this page and involve no credit check, no application and no contact with credit bureaus. You can test as many scenarios as you like without leaving any trace.
How is a monthly loan repayment calculated?
Lenders use the amortisation formula, which converts the loan amount, the interest rate and the term into one fixed instalment. Each payment covers that month's interest first, and the remainder reduces your outstanding balance.
Can I pay my loan off early?
Yes. The National Credit Act gives you the right to settle early, and on personal loans of this size no early-settlement penalty applies. Extra payments shorten the term and directly cut the total interest you pay.
Which repayment term should I choose?
The shortest term whose instalment still fits comfortably in your budget. Use the calculator to test terms side by side: the instalment must be sustainable every month, but every month you cut from the term saves interest and fees.
In short
A loan calculator turns a loan offer into three honest numbers: the monthly instalment, the total interest and the total amount you will repay. Those numbers are driven by the loan amount, the interest rate and the repayment term – and in South Africa the rate is capped by the National Credit Act at the repo rate plus 21 percentage points for unsecured loans, with regulated limits on initiation and service fees as well.
Use the calculators on this page to test amounts from R5 000 to R350 000 over 3 to 72 months, compare a consolidation loan against your current debts, and estimate what your budget can realistically carry. Everything is free and nothing touches your credit record. When your numbers are clear, send one free, non-binding application: it is processed via our partner Myloan.co.za, and you receive personal offers from multiple NCR-licensed lenders. Compare each offer's APR against your calculation, pick the cheapest total cost that fits your monthly budget – or walk away entirely. The decision stays yours at every step.
Ready to see your real numbers?
Send one free, non-binding application and receive personal offers from multiple NCR-licensed lenders – then compare them against your calculation.