WA government employee here smartleasing
Ask for a normal quote as per on the website with all the junk stuff included and then ask for the finance rate. 10% finance rate or lower is a go ask for the rate.
I wouldn't get too caught up too much on any 'interest rate' or 'finance rate' figures they give you - remember this is a lease not a loan (so technically there is no interest).
There's no set way to calculate an interest rate (because it is a lease not a loan) so you can't compare an 'interest rate' between a regular car loan, and a novated lease.
Or even a novated lease between different providers/lenders (because any interest rates can be 'calculated' differently just to get you to sign up - there are some people on 'high' quoted interest rates that have lower actual lease payments, than people on 'lower' quoted interest rates with higher lease payments.
You 'could' work backwards to work out an effective interest rate, but this rate may still be completely different the rate that was 'quoted' to you.
The shorter the lease will generally save you a $700 to $1200 a year vs say a 4 or 5 year lease. If your cash flow supports it of course
For an ECM ICE lease perhaps - I remember doing some figures for a friend - a 5 year lease on an EV worked out 'best', it was only $900 more over a 3 year lease for a total cost - and that total cost over 5 years was still less than buying the car outright with cash. Not to mention the lower impact on take home pay which can then be put into a mortgage offset or whatever...
Sure, you're paying more in lease repayments, but the tax benefits may outweigh this.
(of course the stage 3 tax cuts may cause an impact, plus you'd want to be certain you would still be in the job for 5 years)
Another trick I do is do a 13 month lease or a 25 month lease that way you can claim the 2nd or 3rd year pre tax rego/insurance just before your lease ends. (If you plan to keep the car after)
You can just increase the deductions and factor this in your budget, instead of renting a car for 13 months or 25 months instead of just 12 months / 24 years.
To claim power at home I submit a screenshot of the Tesla app kWh used and a copy of my power bill, you can't claim the installation of a wall charger tho tried that and was denied sadly.
Good luck
Probably because the financier has no interest ripping it out of your wall and taking it back at the end of the lease ;-)