financial mistakes female with her head in her hands with laptop and bills on coffee table

Top 10 Financial Mistakes You’ll Never Make Again—And Why They Matter

/22 Comments/in , /by Mary Hunt

We’ve all been there—making mistakes and vowing never to do it again. But what if those blunders could teach us valuable lessons? From grocery store pitfalls to buying extended warranties, each misstep is an opportunity to learn and grow. In this post, I’ll walk you through some of the biggest financial mistakes I’ve made (so you don’t have to) and the valuable lessons that can transform your finances. Stick around—there’s a lot to learn here!

financial mistakes female with her head in her hands with laptop and bills on coffee table

Have you made any mistakes lately? Want to talk about it? Most people don’t. Can’t say that I blame them. It’s embarrassing. And when it’s a really dumb mistake, well that’s something you hope to never have to think about again. And that’s a mistake.

Mistakes Matter—But Only If You Learn From Them

Mistakes are useful because they teach us what doesn’t work. But making the same mistake over and over again while expecting different results—well, that’s one definition of insanity. There’s tremendous value in learning from our mistakes. 

I’ve accumulated a list of mistakes over many years. It’s like a trophy now—a specific compilation of things that I do not have to do again because I’ve proven they do not work. So, let’s dive into them—some painfully obvious, others sneakier—and the lessons they taught me along the way.

1. Walking Into a Supermarket Without a Plan

Ever strolled into a grocery store (or Costco!) on an empty stomach and left with way more than you needed? Without a list or a set amount of cash, it’s easy to overspend. I know me. Without a conscious decision to stick to it, I am a $200 mistake just waiting to happen. And if I’m really hungry? Make that $300. Hunger and no plan are just a recipe for a bloated grocery bill. The fix? Stick to a plan—preferably written down—and use cash to keep yourself accountable.

2. Buying Extended Warranties on Appliances

It sounds smart, right? Protect your new appliance for years to come. The problem? Statistically, if an appliance is going to fail it will do so in the first 90 days (the product comes with a warranty to cover this time frame) or after five years (extended warranties aren’t that extended). Most extended warranties rarely cover anything that isn’t already protected by the manufacturer’s warranty or fails well beyond the “extended” timeframe.

It’s a good exercise to figure out the total cost of an extended warranty, then consider forgoing it in favor of putting that same amount into your savings account instead of the insurer’s pocket. Chances are very good that at the end of the period warranty period, you’ll have a working appliance and a nice nest egg for yourself. For the record, a laptop computer is my personal exception to this mistake. Laptops fail routinely, trust me.

3. Leasing a Car

Rolling over charges from one lease to the next feels like running on a financial treadmill—you’re going nowhere. I spent more than 20 years stuck in this loop before I realized I was paying more for less. Lesson learned? Owning a car outright (with no payments) is freedom. Financing your dream car with all cash is even better.

4. Buying a 7,000-Gallon Blow-Up Swimming Pool

Impulse buys. We’ve all been there. My biggest? A 7,000-gallon blow-up pool! I didn’t know such a thing existed so I can’t even argue it was something we needed. Standing there in the middle of the Home Show I managed to pull off the impulse purchase of the century (thankfully, this was in the last century). That was a mistake that just kept on giving lessons to be learned until the day several years later we begged Goodwill to just take it away. Please.

5. Carrying More Than $100 Cash

For me, $100 in cash feels like a comfortable safety net. But carrying more than that? Suddenly, I feel rich—and it’s way too tempting to spend. Keeping more than $100 creates an illusion of wealth that usually disappears quicker than you think. That’s a lesson I needed to learn and re-learn. Oh, the insanity.

6. Paying for Christmas with Credit

It’s easy to tell yourself, “I’ll pay it off next month!” when you’re in the middle of the holiday season, but debt is a terrible liar. It insists that while you don’t have the money today, you’ll have it next month. Or the next. Relying on credit means borrowing from your future self and staying stuck in a vicious cycle. Trust me—cash is the way to go.

7. Regularly Eating in Restaurants

It’s just a coffee here, a quick dinner there—what’s the harm, right? Well, it adds up. Spending $25 a week on takeout means losing out on $1,300 a year—money that could be growing your emergency fund or paying down debt. Small expenses have a big impact when you look at the bigger picture.

8. Using Home Equity Like a Piggy Bank

Your home is your castle. Refinancing and taking cash out means giving away ownership to someone else. It also costs you thousands of dollars in interest and fees. The goal is to reach 100% equity—you own it free and clear! If you keep spending the equity through home equity loans (HEL) or home equity lines of credit (HELOC) you’ll never get there, you’ll end up paying way more for your home than it’s worth, which all but guarantees you won’t come out on top when you decide to sell. It’s tempting to refinance your home and take cash out, but here’s the hard truth: You’re trading your home’s future value for short-term needs.

My husband and I spent years seeing our home’s meager equity as some kind of ATM. But we learned from that mistake. After years of hard work plus and benefiting from home appreciation we own our home free and clear—no mortgage ever again. It feels amazing!

9. Living Paycheck to Paycheck

We hear it a lot, “paycheck to paycheck” but what does it mean really? I’ll tell you: Living with no cushion, no savings account, no budget, and no plan—getting paid on Friday, seeing it all but gone by Monday, then white-knuckling by living on credit cards and avoiding creditors until Friday when you get paid and it starts all over again. It’s an awful way to live.

This is the trap most of us fall into at one point or another—earning just enough to get by and relying on credit to fill the gaps. Living paycheck to paycheck means constant stress, no safety net, and no plan for the future. Break the cycle by saving, budgeting, and creating a financial cushion that gives you breathing room.

10. Using Retirement Savings to Pay Off Debt

It seems logical—your debt is costing 19% interest, and your retirement account is making 7%. But it’s not that simple. In addition to losing the power of compounding, it’s very hard to pay back those retirement funds, and you could be hit with hefty fees.

With the right mindset, borrowing from your retirement account can be a viable option, but even the most disciplined borrowers have a tough time coming up with the money to rebuild these accounts. When the debt gets paid off, the urgency to pay it back usually goes away. It will be very tempting to continue spending at the same pace, which means you’ll fall back into debt again, needing to borrow yet again from that 401(k) to get caught up, and on and on it goes. If you are going to pay off debt with savings, you have to live like you still have a debt to pay—but now it’s to your retirement fund.

Debt is reversible, thankfully—but making the same mistakes over and over? That’s a sure way to stay stuck. The key is to learn from every financial misstep and use those lessons to build a better financial future.

 

Question: What was the best lesson you ever learned from a financial mistake? If you feel comfortable, share it in the comments area below.

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22 replies
  2. Sandra says:

    One of my mistakes was in paying off debt the WRONG way. I started paying on a loan we had on our house making a regular payment and then adding a principal only payment. Where I was wrong, was this debt only had a 3.75% interest. I had a debt on a heat pump (heating and cooling our house) with a 10% interest and another on a credit card at 19% interest. When I finally came to my senses I changed my payments to paying off the credit card and the heat pump first and then went back to making those payments on my house as added principal. The loan on my house was for 20 years and I will now have it payed off in 5 years.

    Reply
  3. Pat Goff says:

    I copy my grocery list from KrogerKrazy and print it out. I note what coupons are on my card and dig out the paper coupons and put them in an envelope (reused bill envelope) and I note ibotta or fetch rebates. I will write down other items that I need that don’t have coupons like milk etc on the list. I don’t usually get more than what is on my list unless I see an awesome deal. I get a lot of food that was free after coupons and I share with my neighbors or donate them to food banks. Got free formula and baby food once and paid $1.50 for diapers once just to donate them. I believe in giving back when I can afford to. I just bought 15 6 packs of water and only paid tax for them. Sharing with friends and neighbors and keeping some for myself. We use them when we travel a lot. We don’t usually buy bottled water but it was free and can be used. We make our own flavored water with fruits and veggies or make tea or coffee most of the time. I also send off for all free coupons that come in the mail and we use them or donate them…. I found out that I don’t like gluten free bread but still had some free coupons so gave them to a neighbor.

    Reply
  4. Pat Goff says:

    I buy uses appliances. The Restore outlet guarantees them for 90 days but we have never had a problem with them. Older appliances are made to last not be replaced in a 2-3 years. I had a dryer go out (it was bought new) and when it went out in 1 year I was told that dryers were not meant to last forever. That was the last time I bought new. I paid $35 for my next dryer and so far it has lasted 4 years and it is from the 80s. LOL My washer went out last year but my brother googled it and he fixed it with the help of a man at the appliance parts store. It cost $60 but was worth it. Repairing older appliances is easy as there are no computers in them.

    Reply
    • Wendy says:

      Yes to buying a time share as a big mistake! And, it was an emotional purchase–we had just moved from one side of the country to another, and the timeshare was set in a locale that was reminiscently nostalgic to us.

      In our case, we did use it for a number of years, but finally, it was a mistake that needed to be fixed, as my husband’s dementia meant that we could no longer use it.

      I did go with a Timeshare Release company and paid more than I think I should have for the service that they provided, since I was having to do much of the work of contacting and talking to people. But, it did sell and of course, within just a few more years after that, it had been worth it, in terms of fee paid for that service vs what would have been the continuing ongoing charges for the timeshare.

      But it would have been more worth it to have never have bought in the first place!!

      Reply
  6. Jen says:

    My husband and I shared a checking account for 15 years and could not keep track of the spending. He insisted we had to use one together, and countless overdraft and other fees later, I put my foot down and insisted we each have our own spending accounts with a joint account for bills and household spending. Not one overdraft fee since! You have to find what works, NOT what you HOPE will work!

    Reply
    • KAREN says:

      My mom and dad had one checking account but the their Checkbook ledger kept only what they put in and took out. I suppose now a days each person has their own credit card but I had a lot of people thank me for telling them that. It saved their marriage. You get more benefits with larger balances.

      Reply
  7. Elizabeth A Pruszynski says:

    We wanted to help our son get out of debt. What a mistake that was! We ended up losing so much of our savings and we were never repaid. Thankfully he moved away and is living on his own. He hasn’t called or requested money since he moved. It’s time he learns we are not an ATM machine.

    Reply
  8. JIM OWENS says:

    My biggest lesson was learning the importance of the size of the Emergency Fund. Murphy’s law kicked our butt. The next thing we knew we were $20 K in credit card debt.
    Thank goodness we learned our lesson and received instruction from Mary Hunt and Dave Ramsey. God is good…

    Reply
  9. Sylvia Wells says:

    not knowing enough about 401(k) is almost a death sentence financially. The main reason? Deferred income in the 70s only means that when you take any money out you are taking it out with tax rates in the current year. . FATAL !
    Ext Warranties: Over 20 years I have tried to understand why people would take out a warranty on an appliance or any other thing. It seems to me that if I did so I would be ensuring that the manufacturer knows that he’s putting forth a product that won’t last a long time. Why should I pay for a manufacturer who does not guarantee his own product? To me it’s just foolishness

    Reply
  10. Kathy C says:

    Putting all my eggs in one basket and not listening to my financial adviser. Then to make it worse when the technology sector crashed I told him to pull it out instead of leaving it to let it grow back, and then some, and just putting new finds into other sectors.

    Reply
  11. Suzanne says:

    My worst mistake was ever having a credit card. So much heartache resulted from that one decision. I wish that I’d never heard those two words.

    Reply
  12. Christine Reid says:

    Thank you, Mary, for some very valuable wisdom. I appreciate how you recount your own mistakes and how you learned from them. That kind of honesty really drives the point home about financial lessons.

    Reply
  13. Kayakjack says:

    After a lot of watching of human nature – and a lot of other foolish things – I slowly realized that humans weren’t ever meant to be “perfect”. We were always intended to make some required minimum percentage of mistakes. Some of us have a higher minimum percentage than others, and there isn’t any “extra credit” for having made a really stupid or serious mistake.

    But, thanks for the heads up call on these few possibilities. Hopefully, your warning will narrow our field of potential boo boos?

    Yeah, right!
    Jack

    Reply
  14. Betty Thomas says:

    Such a good list of avoidable mistakes. I can relate to the inflatable pool as I and my husband bought a big ticket backyard item and just knew we would use it a lot. We were wrong. By the time we finally got it put together and used it we found we weren’t that impressed with the process. We could of saved a lot of money and time by doing some research to see if the item really would fit our lifestyle. Lesson learned. Thanks Mary!

    Reply
  15. Vickie Duran says:

    This is what I’ve learned: Just because you ask the right questions, doesn’t mean you’re going to get the right answers, Question everything. This wisdom just saved us from making a big, big mistake regarding solar panels.

    Reply
  16. Ann says:

    DONOT co-sign for ANYTHING OR ANYONE. Person was paying, then lost his job……………..guess what? I had to pay off the debt. So I repeat DONOT co-sign for ANYTHING OR ANYONE. Hard lesson learned.

    Reply

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