It is perfectly acceptable if I tell my company a month before my last day. Senior people(Sr. Manager and above) have left the company by giving 1week's notice. It is something that is not frowned upon and is perfectly acceptable, atleast at my company. I'm not saying I'll take the same route.
Now, as far as the future projects and the succession plan are concerned I've already started preparing my subordinates by having extended after-office sessions with them and not involving myself in critical long-term projects. There have been atleast 3 instances in as many months where I turned down the offer of leading couple of big projects.
Money? Yes. My decision to not tell them has something to do with $$$ factor. But I'm OK even if they throw me out tomorrow because I can find some alternate jobs.
Boss? He doesn't give a **t. I don't give a **t. Because of the different nature of my profile, I interface closely with 3 departments. And many times I'm asked to fill someone else's( not in my department) shoes in. I'm in the right books of the people who matter to me.
Company? It matters to the company if I leave without a proper handover. So, I'm doing my part to minimize the effect of issues that might come up because of the short notice period
I've not told them that I'd quit because of 3 reasons
1) Money is a factor but a very small one
2) I don't wanna get bored. I'm kind of enjoying my work now. I'll quit by mid- June. 2 months is enough for me de-toxify and relax
3) I'm using this time to develop my network.