It does mean that as I am not receiving the £4000 tax free amount, (it is going to motability) that I would need to earn £5000 to replace the amount not received (20% tax payable). So it is very relevant to any UK income tax payer, and must not be missed in any calculations.
I can’t see where this comes from. If you’re looking at opportunity costs of leasing then you’d need to increase your income but I’ve not seen anything relating to that. If you’re buying you gain the £4K income, does that mean you count that as 5k extra earnings?
Your assumptions have seriously over simplified your calculations. When I’m not out and about I’ll try to put together something more realistic as both your insurance and Motability payments will increase and not necessarily by an inflationary amount.
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark