I have to agree with East Hill and Mimi - DH and I have separate checking and savings accounts (plus a "joint" savings - all accounts are titled jointly, though). He transfers his "share" of the bill money to me, and keeps extra money. Whatever is left after bills is mine (after my half of the bill money plus the money he transferred goes to pay bills - one of my chores).
We both then can move funds between our checking and savings accounts as needed for purchases. I probably wouldn't make a large purchase without asking his opinion, but that's because I trust him, not because I have to... (when I have to buy new suits for work, I certainly don't ask). No money comes out of the joint savings without both of us discussing (hasn't happened yet, actually).
I agree - get the 30% that came from savings back ASAP. And enjoy the new bike
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