The minute this guy says to his wife that he wants a separate account, he will lose her trust. If he always had a separate account from the day they met or married, then such a situation would be fine.
HUH?
How the hell is she gonna know if you open it at a different institution and ask for everything to be done online? Make sure it is an account that pays no interest so you get no tax slip.
You have 3 things to condider: money, time, and evidence.
I think as far as money is concerned:
do you have steady income? If so, when you next get a raise ask the personnel department to withhold more tax for some reason or other, then hopefully you can get a significant refund cheque next year which (hopegfully) yo are the only one to see and then deposit it into YOUR account.
Whew!
Or! If you get irregular income see if you can somehow get some of it paid to your other bank account - maybe 3% or something like that.
Get in the habit (and let her see0 tha tyou pay for alot o fthings in CASH. then you can start siphoning some away.
Time - been discussed bdfore, but take maye 2 or 3 errands and exagerrate each by 15 minutes. Voila! 45 mins. Or actually do the errand ahead of time. Do things wher there is the potentail to wait in line a long time. Haircut. Getting tires changed.
Evidence. Put the hobby cel the exact same hidden place every time. No written evidence. Computer as mentioned.