IR35, what is the max that can happen?

[Alpha]

Thank you everyone

It was a good discussion, I took everybody point on board.

My contract, as I mentioned, is outside IR35, but the working practices might fall inside it and I just wanted to take precautions.

[centurian]

How is the 70% and 100% options different?

If they claimed I owed £40k and said I should pay £80k that would be more than enough to get me to leave the country and never return. I hate this place at the best of times (hence my username)

With interest, it will probably be 100K.

[centurian]

It was a good discussion, I took everybody point on board.

My contract, as I mentioned, is outside IR35, but the working practices might fall inside it and I just wanted to take precautions.

Practically everyone's working practices "might" fall inside depending on how strict an interpretation one takes - that's the whole problem with IR35 because it's so vague.