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Long before I ever stepped foot in the finance industry, and before I had even considered becoming a mortgage adviser, I genuinely believed I had this whole personal finance thing completely figured out.
I was always one of those people who treated life like a giant Excel spreadsheet in my head. A + B = C. I thought personal finance was a hard science—you just follow the maths, you don't let feelings get in the way, and you win.
Then, my wife and I bought a house, combined our finances, and sat down to structure our mortgage. That is when I learnt a massive, humbling lesson: personal finance is rarely just about the maths.
The Revolving Credit Conversation That Opened My Mind
I had come to the dining table armed with my spreadsheets, ready to set up our lending perfectly. I spent ages explaining why putting our emergency savings into a revolving credit facility—rather than leaving it in a separate savings account—made the most mathematical sense. By offsetting our cash against the mortgage, we would save a calculable amount of interest every single day. It was flawless on paper.
When she pushed back against the idea, I initially couldn't understand why it wasn't clicking for her.
Now, I need to be very clear here: my wife is an incredibly smart, wholly sensible person. This wasn't some outdated trope of the 'logical husband' and the 'emotional wife.' She understood the maths and the spreadsheet perfectly. The clash happened because we were valuing two completely different things.
I was valuing mathematical efficiency. She was valuing autonomy and psychological security.
For more info on how revolving credits work read this article.
Where Our Money Mentalities Actually Come From
When you combine your lives and your finances with someone, the lines can get very blurry, very quickly. To her, a convoluted revolving credit limit blurred those lines too much. It didn't feel like our money; it felt like the bank's money.
Seeing a distinct, easily accessible emergency savings account sitting there provided a tangible sense of safety. Having cash that is clearly defined and instantly accessible isn't just about earning a bit of interest; it is about retaining a sense of personal control. It is about knowing you have a safety net that is actually yours.
Nobody's financial mentality is built in a vacuum. The way we think about money isn't programmed by a calculator; it is shaped by our need for security, the financial shocks we've lived through, and how we view independence. If having our emergency funds sitting in a separate, accessible account made her feel secure and in control, then that was exactly what we needed to do—regardless of the minor financial penalty in lost interest savings.
She was absolutely right.
The Real Cost of 'Perfect' Advice
That conversation happened years ago, but it completely shaped the way I work with people today as an adviser. I never just take a human-calculator approach to giving advice, because I know that a huge component of personal finance is about how your structure makes you feel.
This psychological factor is massive when it comes to setting up home loans for my clients. For instance, I can argue all day long that fixing your mortgage on a one-year term is currently the best option because of economic forecasts and yield curves. The spreadsheet might definitively say it is the cheapest route.
But if being on a one-year rate means you are anxiously reading the financial papers every single week, terrified of what the Reserve Bank might do to interest rates next month, then it is absolutely not worth doing. You are far better off taking a slightly higher rate on a longer fixed term just to buy yourself peace of mind. Safety and certainty have a tangible value that a calculator cannot measure.
What I learned in a Nutshell
Any financial plan that stops you from sleeping comfortably at night is, fundamentally, a rubbish financial plan.
The best mortgage structure isn't always the one that saves you the absolute maximum amount of interest on paper. It is the one that respects your mentality, fits the way you actually live your life, and makes you feel secure when you lock the front door at night.
