The amount of money in your bank account magically doubles RIGHT NOW, does it make a big difference? Does it change your life at all?

No. Gives a bit more breathing room, so one thing probably won’t destroy me, but not enough to actually do anything with.
- Yeah same. It’d be real nice and help out, but not life changing or anything.

Here to post and see the obligatory $02 = $0
- what if you have a mortage and your bank account shows -$300k?
  
  -$600k
- Oof, we've all been there. May better days be ahead friend!

If that includes IRA and 401k, then yes, I can retire today, and much more comfortably.
- Exactly. Keep your bank account at a safe but not wasteful level while letting the rest appreciate somehow.

depends, all bank accounts or just the main one. Cause if all, them yeah, huge difference. Just our main bill account, no not really.

Which account? Salary account that my card is connected to? That is about two months of expenses.
Emergency fund account? Now we're getting somewhere. It's about one years expenses I get.
Investment account? I'll be able to fund my current lifestyle with the dividends forever even with inflation adjustments.
- Mortgage account? Fuck it, I'm declaring bankruptcy.

I'm out of work and slowly burning through the savings so doubling it would give me an extra six months headroom

Not really. I’m fortunate enough that I have enough money in the bank to hold myself over for a few months. It’d just double that amount of time for me.
I could probably get the new camera I want, but I could do that now too, I just don’t want to spend 4 figures on something this moment.

I'm going to assume the "magical doubling" is totally legal and tax free. Meaning, the bank won't come after me for the accidental deposit in a few days and whatever process added to my account also sent money to the IRS in my name to pay the inevitable tax bill. Obviously, my answer would be different if this weren't the case.
It would make a small improvement in my life, but not much. I'd lock the extra money away in savings and likely wouldn't touch it, but it would provide peace of mind in case things went south financially.

I could pay for my prescription, that would make my life immediately better. Pretty depressing state of affairs tbh!

Isn't that how capitalism works, now that I think about it... The more you have, the more you have and the less difference it makes.

All of my bank accounts? Checking, Savings, HSA, 401k and IRA? While significant I don't think I'd really do anything different than I am doing now.

Right now? I'd hardly notice. I get paid tomorrow. This time tomorrow would be a bit better. Even better if it was this time tomorrow and the joint account too, that would be a lot better.
None of it would actually be life changing though. It would just make up for our recent house move and all the associated stuff really.
- Same, right now I'm -$300, ask again in 12 hrs when two paychecks hit the joint bank acct, I might be able to make the car payment AND the car repair payment, yippee.
  
  Sorry bro, you at -635 because of the over draft fee, magic don't wait for pay day :(

Yes absolutely. It will allow me put a downpayment on a house, although we're still not decided if we want to stay long term where we are now. If not, then we'll have a considerable budget to not worry about rent for a while.

I'm glad I put my overdraft in a loan, else it would be disastrous.
On the regular account it would help a tad, on savings a tad more. Big difference, nop. (But we could finally buy the oled TV and keep some for emergencies)

Checking account? No change -- I have more in savings (emergency fund)
All accounts, including mortgage? ouch. I'd still be above zero, but I wouldn't like the new, bigger house payment.

It wouldn't be life-changing, but it would definitely put me in a better place for a year or so.

No big material differences. I'd just shove it into retirement savings after maybe taking a trip.
Double my income and some things would definitely change a bit.

Which account?
checking - no change
savings - nice bonus
IRA - I might be able to retire eventually

Having been recently opted for a voluntary layoff to avoid my team needing to lose anyone, I'm in a spot where I can finally relax, maybe take a vacation, and center myself to decide what my next move is. It will likely be another management position, but I have the luxury of not needing to rush to answer that question. I have an idea for a project that I started working on and could turn into a business idea. Doubling my money would mean I have more time to relax and figure myself out (I've been VERY stressed, and didn't even realize it until I left). Ultimately, I'll get bored, and having more money to do something with would mean I could throw more money at the stock market to try to improve my retirement.
Does doubling my money change much? Hard to say. In the short term, no. Long term, probably.

No. I'd be slightly closer to buying a car but still far, far away. Like that galaxy.

it would be much welcomed. I could use it to pay off most of my credit card debt

I'd retire.
- Sounds like you're doing very well with savings regardless of magic money doubling!
  
  I'm lucky to have a high paying job and a wonderful community around me where most of my needs are met, so my cost of living is low even with two children.
  Ive been working on early retirement wince the day I started my career and Im a little over halfway there :) If I could double even one of my accounts I'd be set.

I am in the first year of my life where I had actually saved some money. Doubled, I think I can live without a job for a year. But that accounts for no food, medicine, or any expenses.

Not really. Sure there are a few projects or purchases that I might move up by a few years, but my lifestyle is too stable. Honestly, I think I would just put a chunk into retirement. I'm a little behind.

I could start seriously looking to put a down payment on something. So that would be cool.

Makes me feel a little less nervous about the car I know I'm going to have to replace in the next year or two
- Man I hate how car dependent we are. So hard to get anywhere without one in a lot of places, and they are just constant money sinks.

I took out a massive loan to pay for home renovations so yeah that would be fucking awesome, I would have more money now than I've ever had in my entire life, I could actually pay for all of my home renovations and all of my other debt combined except for my mortgage and have money left over
- Ah man that would be the best situation! Magically turn a loan into money you own.

Does this include my depot or not? If it's just the bank it would suck, I just keep 3 monthly salary there...