You may have to pay the congestion charge of £15 if you pay in advance or on the same day, otherwise it is £17.50.
You may also have to pay ULEZ of £12.50 a day and maybe the LEZ charge.
This website tells you all you need to know about the charges, how to pay and when. There is also a link for you to check whether your vehicle is exempt.
https://www.visitlondon.com/traveller-information/travel-to-london/driving-in-london
Why would you want to drive into London? I haven’t done that for about 30 years. Nightmare. Especially with congestion charge, parking and roadworks! Get the train or buses every time. Where do you want to go in London?
The problem for many people is that if you dip your toe into the ULEZ area, you are stuffed. I live on the south coast and happily motor around in a lovely diesel Mercedes. My elderly sister lives about one mile inside the London Boro of Sutton. So when we visit her it will cost us £12.50 more, every visit. You can bet your bottom dollar King Khan will jack that twelve fifty up every anniversary until no one on reasonable means can afford to visit anyone ever. I watch the results of the London Mayoral election with much interest, along with many many others.
Khan is killing London for everybody. I live in Sutton and I see no attraction to visit this rip-off city. Even the theatres are prohibitive and Oxford Street is a boarded up mess.
And Birmingham, Aberdeen, Oxford, Edinburgh, York, Bath, Portsmouth, Sheffield and Glasgow - although not all charge domestic cars.
Coming soon to a city near you