Firstly, don't worry, we're not off on the wrong food :) Healthy discussion! I may be a bit off-base being so opinionated as my first few posts..
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FOOT! wrong FOOT!
hahaha, had to leave that typo!
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I'll completely admit, I was ignorant to what true MMM'ing is... I just thought it was another 'spend less, save more' with a unique back-story... not that it would be a bad thing...
For the truly frugal, budgets probably aren't necessary... they're not spending anyhoo... I guess I'm in more of the "reduce spending" camp than most!
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I'm curious how you are using YNAB.
Currently I am still living paycheque to paycheque, and I hope to end that cycle very soon. The biggest thing is, I am using my budget categories to make spending decisions. Not meaning I spend it all, still be frugal, but bank account balance becomes irrelevant.
Besides monthly fixed expenses, and monthly variable expenses, YNAB and I have a third category called "Rainy Day Funds". I am saving for furnace replacement, car replacement, deck replacement, car repairs, birthdays, christmas, etc...
When I get paid, I enter the income. 3 or 4 keystrokes... then I decide what I need that money to do before I am paid again (If I had a month's income as a buffer, I could do the entire month on the 1st). I apply it to bills, groceries, savings, etc... but every dollar has to go somewhere.
Then when I'm out shopping, it helps me be frugal knowing I have to enter that transaction into YNAB & categorize it.
If I have money left over in a category at the end of the month (try to!), it carries over into next month's available, so less needs to be allocated to that, and more to savings (rainy day categories keep growing).
It's been a game-changer for me, from unknowing spending not realizing how much we spent on unimportant things, to a clearly defined worksheet for us. It has given us direction and priority, allowing us to spend $$$ on things that are important to us, and not accidentally on other things.