What's The Most Expensive Mistake You've Ever Made?

Oh, mistakes. We all make them, but some are a whole lot harder to fix than others, especially when money is involved.

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So, I'm super curious to hear about your most costly mistakes.

Maybe you kept forgetting it was time to take your car in for an oil change, but you figured it was no big deal...until your car seriously overheated on the highway and you had to pay out the nose to replace a bunch of heat-warped engine parts.

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Or perhaps you made a mistake at work, like forgetting to put away a food delivery when you worked in the back of house at a restaurant. It was a busy day, so it totally slipped your mind...until you found hundreds of dollars worth of spoiled meat and realized there wasn't enough food in the fridge to prep for the next shift.

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Or maybe you had a credit card that you treated like "free money" and used for things like nights out and just-for-fun clothes shopping...until you maxed it out and realized you'd have to find a way to pay the whole balance back, with interest.

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Share your most expensive mistakes in the comments and you could be featured in a BuzzFeed Community post.

And for more stories about life and money, check out the rest of our personal finance posts.