Introduction
Picking a car is hard enough when you only look at the sticker price. A novated lease adds salary deductions, tax treatment and an end-of-lease payment on top, which makes two cars with similar prices cost very different amounts in your pay.
A calculator takes that complexity and turns it into a few comparable numbers. This guide shows what to enter, how to read the results and how to use them to choose between cars.
What a novated lease calculator does

A novated lease calculator estimates what a car would cost you if you paid for it through a novated lease. It takes details about the car, the lease term and your pay, then works out how much comes out of your salary before tax, how much comes out after tax and what that means for your take-home pay.
The value is in the comparison. One figure on its own tells you little, but the same calculation run for three different cars shows which one fits your budget best. It also shows how changing one detail, like the lease term or the fuel type, moves the cost.
What to gather before you start
You will get a more useful answer if you have the following ready:
- Your annual salary before tax
- The price of the car you are considering, including on-road costs
- The lease term you are thinking about
- Your expected yearly driving distance
- An estimate of running costs such as registration, insurance, servicing, tyres and fuel or charging
- Whether the car is petrol, diesel, hybrid or electric
Use realistic figures. Underestimating your driving or leaving out servicing makes a car look cheaper than it will be.
How to run a comparison
Start with the car you like most and enter the details. Note the result, then change only the car and run it again for the next option. Keep your salary, term and distance the same each time so the difference you see comes from the car, not from the inputs.
Look at these outputs for each car:
- The cost per pay after the tax effects are applied
- The split between pre-tax and post-tax deductions
- The residual payment due at the end of the lease
- The running costs included in the package
A cheaper car will often show a lower cost per pay, but not always. A car with lower running costs, such as an efficient hybrid or an electric car, can cost less overall even when its price is higher. That is the kind of result a calculator is good at revealing.
How to read the results
The cost per pay is the headline number, but it is not the full picture. Check the residual too. A lower regular cost can come from a larger final payment, which you will still need to cover when the lease ends.
Look at how much of the cost comes from running costs compared with the lease repayment. If running costs are a big share, a car that is cheaper to service and fuel can change the ranking.
Then compare the results against your budget, not against each other alone. A car that wins the comparison but strains your pay is still the wrong car.
Common mistakes to avoid
Using the wrong salary. Enter your actual taxable salary. A rough guess shifts the tax effect and the result.
Ignoring the residual. Treating the end payment as a distant problem hides a cost you will still pay.
Changing too many inputs at once. If the term, the car and the distance all change between runs, you cannot tell what caused the difference.
Forgetting what the estimate leaves out. A calculator uses assumptions about rates, fees and tax. Your actual quote can differ.
Skipping electric vehicle rules. Tax treatment for eligible electric cars has been changing, so check the current rules for your car and start date.
Using your results
Treat the calculator as a way to narrow your options, not to make the final call. Pick the two or three cars that suit your budget, then ask a provider for a written quote on each so you can check the figures against what the calculator showed.
Frequently asked questions
Is a novated lease calculator accurate?
It gives a good estimate when you enter accurate details, but it is not a quote. Fees, interest rates and tax settings can differ in the final offer, so confirm the numbers in writing.
What information do I need to use a novated lease calculator?
You need your annual salary, the car price, the lease term, your yearly driving distance and an estimate of running costs. Knowing whether the car is electric, hybrid or petrol also helps.
Can I use the calculator to compare an electric car with a petrol car?
Yes. Enter the same salary, term and distance for both, then compare the cost per pay, the residual and the running costs. Check the current rules for electric cars, since tax treatment has been changing.