Don't take this info as gospel, it's from my California/Documented boat experience of 23 years ago.Texas Doesn't have the tax and I imagine I will have to register it in California as well now that they now where I'm at. Whats the reg. sticker fee ?
There's no requirement to obtain State registration on a federally documented boat in California. The tax hammer you're experiencing right now is assessed by the County rather than the State. Now that you've been smoked out you should expect an annual tax bill from the County.
If you choose to register with the State, their fee is independent of the County tax and is based on value through a bizarre calculation of length and age. For example, the bi-annual fee for my 1984 Zodiac MkII Grand Raid is $20.00, the bi-annual fee for my 1977 Catalina 30 is also $20.00. Looks like at some point you reach their minimum.