Most budgets, personal or business, aren't built. They're copied from last month, last year, last time, and never actually looked at again.
Here's a small, honest exercise. Open your last three months of spending and ask, for every recurring line: would I approve this if I were seeing it for the first time today? Most people can't answer that quickly, because most budgets aren't decisions. They're momentum. You spent it last month, so it's just what the number looks like now.
Having a budget and sticking to it turn out to be two very different disciplines. The first is a spreadsheet. The second requires actually questioning what's on it, which is uncomfortable, so most of us don't. We roll last month forward, adjust the number that's screaming for attention, and leave the rest alone. The rest is exactly where the drift lives.
A traditional budget starts from last period's number and asks "what should change?" A zero-based budget starts from zero and asks a harder question: "if I were building this from nothing, what would I actually choose to spend money on, and why?" Every expense has to be justified again, every period. Not because the old expense was necessarily wrong, but because "we've always done it this way" stops being an acceptable answer.
Businesses that go through this process consistently find the same thing personal budgets find: a meaningful chunk of what they're spending on isn't wrong, exactly. It's just never been looked at.
This is the same discipline we bring into every engagement, just applied to spending specifically. It isn't a coincidence. It's the same underlying belief: you can't fix what you won't look at directly.
It's uncomfortable in exactly the way the exercise at the top of this page is uncomfortable. That discomfort is usually the signal that you're looking at something real.
If you want to try this in your own personal finances first, before bringing it into the business, our founder actually built a tool for exactly that. Placia is another project from our founder, built on this same belief: a personal budgeting app for building a budget from zero instead of copying last month forward.
See what a zero-based approach looks like in your own budget, no business context needed.
Visit Placia →Want a second set of eyes on what's really being spent, and why? That's exactly where Decode starts.
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