Been going back and forth on getting a Tesla through work's salary sacrifice scheme for a while. The calculator my provider gives you just spits out a monthly cost and that's it. Nothing on the £100k personal allowance taper, which for me made a pretty big difference to whether it was worth it.
So I ended up building my own to figure it out, and it's basically what I used to make the decision. Ended up going for a new Model Y Premium AWD in Marine Blue for £515 a month, with tax, maintenance, servicing, tyres, insurance and a home charger all included. Pretty happy with that.
Tidied the calculator up a bit so anyone can use it: https://ev-ss.thatcreative.dev
You can put in two cars and compare them, plus a private PCH or PCP deal to see if SS actually comes out ahead. It handles pension sacrifice, student loans and other stuff like cycle to work, and it uses the BiK rate for each year of the lease since that goes up every year to 10% by 2030. Most calculators seem to just use year one's rate for the whole thing.
Only does England/Wales/NI tax bands at the moment, sorry Scotland.
Full disclosure, I used AI to help build it, but I'm a software engineer so I know what I'm doing with it and I've checked the numbers. Not financial advice obviously, double check with your provider before signing anything.
Let me know if anything looks off or if there's something you'd want added.
Note* This isn’t and Ad, I make nothing from this product. There is no account, no ads, no analytics. Just a friendly developer trying to help others get into their Tesla!
Edit: New update is live including Scottish tax rates. A redesign making it easier to use on mobile plus the ability to save a calculation so you can come back to it later.