Why we break our diets and overspend

We tell ourselves that this month will be different. We have stuck to our budget and been more disciplined.  Finally we get things under control. Then something small happens. A stressful day. A bad mood. One impulse decision and we buy something we don’t need. Does that sound familiar? That used to be me with money, and it still is me, to some extent, with food.

I will eat something that “wasn’t part of the plan.” Maybe Mr S made a cake, or someone gifted me chocolate which I can’t keep in the house without devouring it. Then follows the thought that quietly undoes all my previous hard work. “Well… I’ve already messed up.”

We then lean into it. Spend a bit more. Eat a bit more. Not because we don’t care, but because, in that moment, it feels pointless not to. By the end of it, we are left wondering why do we keep doing this to ourselves? Why are we self sabotaging?

THE CYCLE

It feels like a lack of discipline, but I assure you it is not. Overspending and breaking diets follow the same pattern.  Once you see it, it’s hard to unsee. They’re not random slip-ups. They’re a cycle. One that has a lot more to do with how you cope, what you believe about yourself, and how you handle discomfort. It is not about money or food.

It’s the Same Cycle but it doesn’t feel like a pattern when you’re in it. It feels like a one-off decision. A bad day. An exception. However, when you zoom out, the same sequence shows up again and again.

It usually starts with a feeling. Maybe stress, boredom, or frustration. Sometimes even something quieter, like restlessness or low mood. That’s when the justification kicks in.“I deserve this.”. “It’s just one time.”. “This will make me feel better.” you therefore act. You buy or eat something. For a few moments, it works. There’s relief. A small lift. A break from whatever you were feeling before.

Unfortunately it doesn’t last. Not long afterwards, the second wave hits, which is guilt or regret. That sinking feeling of “I’ve done it again.” This is where the cycle really locks in. Instead of stopping there, your brain shifts into a different kind of thinking. “Well, I’ve already messed up and so I might as well start again tomorrow.”

What was a small decision turns into a bigger one. A single purchase becomes more spending. One unintentional treat turns into overeating.

Then comes the reset which I tend to do at the beginning of the week. I make intentions to be stricter and more disciplined this week. I will do better. Often this just sets the stage for the cycle to repeat.

WHAT IS ACTUALLY FUELING THIS?

The fact you keep repeating this cycle is not random. There are a few underlying patterns that quietly fuel it. Once you notice them, your behaviour starts to make a lot more sense.

All-or-Nothing Thinking

You are either “on track” or “completely off”, in your head. Therefore when you make a small mistake, it doesn’t stay small. Your brain treats it like total failure. One extra expense becomes: “I’ve blown my budget.”. A chocolate bar becomes: “I’ve ruined my diet.”. Once it feels ruined, there’s no reason to hold back.

Emotional Coping (That Actually Works… Briefly)

Overspending and overeating aren’t just bad habits, they are actually effective in the short term. They are a coping mechanism. They change how you feel. they provide a quick lift. That is why it keeps happening.

The Story You Tell Yourself

Pay attention to your quiet, automatic thoughts and how negative they are. You are disappointed in yourself, show yourself no compassion, and those voices in your head reinforce that feeling of failure. These thoughts then turn to negative feelings, and utter  hopelessness.

The stricter you are, the stronger the backlash. When your budget is too tight or your diet too rigid, it starts to feel less like a choice and more like being controlled. Therefore eventually, something in you pushes back.

How to Break the Pattern (Without Making It Worse)

If you’ve been stuck in this cycle, your instinct might be to double down and be stricter. However, that usually backfires. Breaking the pattern isn’t about becoming perfect. It’s about responding differently in the moments that usually trip you up.

Catch the Moment Before the Spiral

The most important point isn’t when you’ve “failed.” It’s the moment right after the first small decision. If you can catch the thought “I’ve already messed up,”, then you create a gap, and in that gap, you have a choice.

Change the “Ruined” narrative. One expense doesn’t define your finances. One meal doesn’t define your progress. The damage almost always comes from what happens after. Making things more flexible, and not stricter, helps. I give myself a small budget each month that I can spend on anything I want. Often I don’t spend it all, or buy charity shop  toys for my grandson. However it takes away that feeling of deprivation. We also make a traybake, or nice dessert each week. There is enough to have a little treat each day, but when it is gone, it is gone. A sustainable approach always wins over extreme.

Get Curious Instead of Critical

Instead of asking “Why am I like this?”, I ask “What was I feeling right before that?” That small shift turns the moment into information instead of failure.

Expect Resistance

Part of you will still want the quick relief. That doesn’t mean you’re failing. It means you’re interrupting a pattern that’s been running in your life for a long time.

A Different Way to Look at It

Maybe the problem isn’t that you lack discipline. It could be that you’ve just been trying to control your behaviour without understanding what’s driving it. When you understand it, something shifts. You realise that you don’t need to be perfect. You don’t need to get it right every time. You just need to stop turning small moments into full spirals and to show yourself compassion.

I am writing this today as a nudge to myself and to remind my brain. I need to just lose a few pounds to get below another stone mark. I have done so well and yet at the last minute I keep self sabotaging it. Usually I journal to give my head a wobble. Today I thought it would be more constructive to write a post. What has helped you get out of this cycle? Please share.