I keep losing because of poor time management. Any legit tips?

Maybe try having little mental checkpoints with your clock to make sure you don't end up in time trouble. The average length chess game is 40 moves, so if you are playing a 30 min game, then try to have at least 15 or 20 minutes left on your clock by move 20 (halfway point). The guideline is to ensure you are on pace for that time control. A little extra time is needed in case the game goes past the average 40 moves. 

You can also play with a small increment like 30/5 instead of just 30 min if that helps. 

Thank you very much. This means a lot. I will absolutely focus on adding these techniques into my crosscheck.

Nice

try a few daily games

Generally I started with 30|0 OTB but I never got below 5 minutes, you might be overthinking things, but take into account I played my first OTB games after 4 years or so of playing chess casually. I've focused more on blitz so time is not an issue for me.

play blitz and learn how to play quick, then use those speed skills when you're low on time. and save your time for the middlegame, dont spend too long on the opening

Yeah generally I spend <1 minute on the opening, <5 minutes on the middlegame, and the rest for endgames... 

#1

"My #1 source of losses by far is time management."
++ Do you mean you lose on time in won positions? Or do you panic, blunder, and lose?

"99% of my games are rapid 30 minutes."
++ That is adequate indeed.

"Yet all of a sudden I'll look down and realize I'm on move 10-15 and I have less than 10 min left."
++ 10 min left at move 10 is OK. People play 1+0 bullet at a pace of 2 seconds/move, so you surely can finish at a pace of 30 seconds/move.

"Does anyone have any legit tips"
++ Look at which move cost you most time. Was it a good move at all? Could not you have found the same move in less time?

1. Practice your openings so you can finish opening phase quickly I like to finish my opening face in less then a minute maybe move 5-10 depends on varations.

2. know when to calculate in depth (Sacks and such) or when to calculate small things. this just takes practice and instincts, do tons of games for that and analyze them after find patterns and such. I think biggest thing is practice. 

3. don't just calculate one move. I like to calculate 2-4 moves in advance that way I can blitz them out, granted this can backfire and if your opponent plays something unexpected obviously this doesn't work.

Playing blitz as someone said, won't make you faster, it will make you superficial, still you are going to loose time...

From your post, you loose much time in openings, and this is not rare effect. i have seen lots of things like this. So, you should clear with yourself that opening is only development of pieces and nothing more than that and nothing else you should bother yourself but to develop and maintain more or less balanced game. This way, you ll preserve some time for moments it will be really needed.

Perhaps if you post some games we may discuss more to details...

Anyways actually people spend <1 second per move sometimes... in bullet at least.

Play a lot of chess so the moves come easier to you. Then, you will be able to play quickly and accurately.

Add a 5 or 10 second bonus to your time controls.  And learn how to (both) play endgames FASTER, and how to force endgame wins.  VERY SIMPLE.  That way you win games via pawn promotion, instead of burning up your time searching for those elusive (but exciting) mating attacks.  Ha!

Play slower time controls like daily chess.   Give yourself time to think, and improve.  Use the following cheat sheets on each move until they become muscle memory, and then play faster time controls if you want.

Before making a move go through each of these checklists:

In the opening phase of the game. use this checklist.

Opening Principles:

1. Control the center squares – d4-e4-d5-e5
2. Develop your minor pieces toward the center – piece activity is the key
3. Castle
4. Connect your rooks

Tactics...tactics...tactics...

The objective of development is about improving the value of your pieces by increasing the importance of their roles. Well-developed pieces have more fire-power than undeveloped pieces and they do more in helping you gain control.

Now we will look at 5 practical things you can do to help you achieve your development objective.

They are:

1. Give priority to your least active pieces.

• Which piece needs to be developed (which piece is the least active)
• Where should it go (where can its role be maximized)

2. Exchange your least active pieces for your opponent’s active pieces.
3. Restrict the development of your opponent’s pieces.
4. Neutralize your opponent’s best piece.
5. Secure strong squares for your pieces.

Before each move use this checklist:

Pre Move Checklist:

1. Make sure all your pieces are safe.
2. Look for forcing moves: Checks, captures, threats. You want to look at ALL forcing moves (even the bad ones) as this will force you look at, and see the entire board.
3. If there are no forcing moves, you then want to remove any of your opponent’s pieces from your side of the board.
4. If your opponent doesn’t have any of his pieces on your side of the board, then you want to improve the position of your least active piece.
5. After each move by your opponent, ask yourself: "What is my opponent trying to do?"

+1 Bacon

I have this problem. I just get flagged by other 1400s. Either that or Albin traps. lol

play 15|10... or 30|0... or 60|0

The game always ends before I can run out.