The costs of running a boat each year:
My figures are based on a 40 foot or 12 meter boat and a 50 foot or 15 meter boat.

Boat size	Licence (Gold)	Licence EA	Mooring Cost	Third Party Insurance
57 (17m)	630	778	1200
58 (18m)	653	778	1300

There would appear to be a discount of 25% to and boat propelled by an electric engine!

What is the Gold Licence?

The Gold Licence is the British waterways licence that also covers East Anglia and just about all the none private rivers.

What do I need for a Licence?

My understanding is that you need 3rd part 1 million pound insurance, and a mooring unless you can prove you are permenantly traveling.

How are the mooring costs worked out?

I took a wild stab at a number of £80 per metre, this is based on a rough average of most of the moorings I can find.

Does my boat need an MOT?

If it is a boat with a permenant engine then yes. It is called an Boat inspection and is required every 4 years.
This inspection checks that the boat will not sink, and also the safety of all items on the boat.

Insurance

As a rough guide £20,000 boat could cost somewhere between £200 and £300 to cover.
So with my maths if you say about £15 per thousand pounds on a typical boat.

Painting

I have been lead to believe that an antifoul paint - which is painting below the waterline is abotu £500.