The cost of a Tesla varies depending on the model and the options you choose. Generally, the starting price for a Tesla in the United Kingdom ranges from around £40,000 to £150,000. Depending on your downpayment, financing options, and the available incentives, your monthly payment could vary significantly. For instance, if you were to purchase a Tesla Model 3 with a downpayment of £6000 and a loan of £45,000 with a 12% average APR, your monthly payment could be around £573. That being said, it is highly advisable to do your research and calculate the cost of the model you are interested in before making a purchase.