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Car Finance Calculator

Estimate monthly instalments on vehicle finance in South Africa.

Reviewed by The QuickCalc Editorial Team · Last updated · About our methodology

Enter your details

Result

Monthly instalment
R6 240,52
Amount financed
R315 000,00

Inputs & results at a glance

Updates live as you change the form above.

ItemTypeValue
Vehicle priceInputR350 000,00
DepositInputR35 000,00
Balloon paymentInputR0,00
Interest rateInput12.5%
TermInput6 years
Amount financedResultR315 000,00
Monthly instalmentResultR6 240,52
Balloon at endResultR0,00

About this calculator

Amortisation formula applied to (price − deposit − balloon).

Buying a car on finance is one of the biggest monthly commitments most South Africans take on. This calculator shows what your vehicle finance instalment will be once you factor in your deposit, an optional balloon payment, the interest rate and the contract term. It uses the standard amortisation formula applied to the amount actually financed.

A balloon payment is a lump sum due at the end of the contract that is excluded from the monthly amortisation. Choosing a balloon lowers the monthly instalment but means you must settle, refinance or trade the vehicle in to clear the balloon when the term ends. The calculator shows the balloon amount separately so you can plan for it.

Vehicle finance rates in South Africa are usually quoted as prime plus a margin and depend on your credit profile, the deposit and the type of vehicle. Terms of 60 to 72 months are common. Remember that the calculator excludes on-the-road fees, comprehensive insurance and tracking — these add meaningfully to your true monthly cost of ownership.

How to use it

  1. 1Enter the vehicle price. Type the negotiated on-the-road price.
  2. 2Add your deposit. Cash or trade-in value applied upfront.
  3. 3Decide on a balloon. Optional lump sum due at the end of the contract.
  4. 4Set rate and term. Use the rate offered by the bank and a 60–72 month term.
  5. 5Check the instalment. Confirm you can afford it alongside fuel, insurance and maintenance.

How it works

Vehicle finance in South Africa is normally structured as an instalment sale agreement. Your deposit is subtracted from the on-the-road price and, if you choose a balloon, that lump sum is also subtracted from the amount amortised over the term. The remaining amount is treated exactly like a normal loan: interest accrues monthly, and the calculator solves for the fixed monthly instalment that will pay the amortised portion down to zero by the end of the contract.

The balloon is then owed as a single payment at the end of the term. Many South Africans plan to refinance or trade the vehicle in to settle the balloon, but that only works if the car's market value is still above the balloon amount — which is not guaranteed, especially after 60 to 72 months of depreciation. Banks price vehicle finance as prime plus a margin based on your credit score, the vehicle age and the deposit, and the calculator lets you test the impact of each variable before you sign.

Formula

Financed = Price − Deposit − Balloon; M = Financed × [ r(1+r)ⁿ ] / [ (1+r)ⁿ − 1 ]

Financed = amount amortised over the term; r = monthly interest rate; n = number of months; M = monthly instalment. The balloon is owed as a lump sum at the end and is not part of M.

Worked examples

R400,000 car, R50,000 deposit, no balloon, 72 months at 13%

Amount financed R350,000. Monthly instalment ≈ R7,072. Total repaid ≈ R509,180.

Same car with a 30% (R120,000) balloon

Amount amortised drops to R230,000. Monthly instalment ≈ R4,648 — but you still owe R120,000 at the end of month 72.

Frequently asked questions

What is a balloon payment?

A balloon is a lump sum due at the end of the finance term that is excluded from the monthly amortisation. It lowers your monthly instalment, but you must settle, refinance or trade in the vehicle when the term ends.

Is a balloon a good idea?

It reduces your monthly cost but adds risk: if the market value of the car has fallen below the balloon by the end of the term, you'll have to find cash to settle the shortfall. Rule of thumb: keep the balloon below 30% and only if you have a clear plan to settle it.

Should I take a longer term?

Longer terms (72 months) lower the monthly instalment but you pay significantly more in total interest and are more likely to end up 'upside-down' (owing more than the car is worth). 60 months is a reasonable middle ground.

What interest rate can I expect?

South African banks price vehicle finance as prime plus a margin based on your credit score, deposit and the vehicle. Well-qualified buyers can secure prime or prime -0.5%; higher-risk buyers may pay prime + 3% or more.

Does the instalment include insurance and tracking?

No. Comprehensive insurance is compulsory on financed vehicles and typically adds R1,500–R3,500 per month. Approved tracking is often required and adds R150–R300 per month. Budget for these separately.

Can I put down a bigger deposit later?

You can pay a lump sum into the finance at any time. It reduces the outstanding balance and the interest you pay from that day forward, but usually doesn't change the fixed monthly instalment unless you renegotiate the contract.

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