The creator of that 50,000-upvote spreadsheet described it like this: "This spreadsheet is made so you only focus on ONE number."
Not twelve categories. Not a dashboard. One number: what's safe to spend, today. That's the entire method. I'm going to give you the whole thing here — free, no email required to read it. If you want the ready-made sheet at the end, that's a separate thing. This part is just the idea, in full.
That's it. Every morning — or every time you're about to spend — you check one number. If today's purchase fits inside it, you're fine. If it doesn't, you're not. No categories to misfile a purchase into, no dashboard to misread.
This is where almost every budgeting tool quietly gives up — hourly shifts, tips, freelance invoices, commission. Here's the fix the 50k-upvote creator used for their own tip income: calculate your number using your lowest realistic month, not your average one.
Do that, and every better-than-minimum month becomes a bonus sitting on top of a number that already works — instead of a trap where a slow month means you've already overspent against an average that never actually shows up.
That's the whole practice. No Sunday-afternoon budgeting session, no monthly reconciliation.
One note on that last step, typing the amount in by hand: it's not a missing feature. Apps that auto-import every transaction feel efficient, but they let a $40 impulse buy slide past without you ever really registering it. A Quora answerer explained why manual entry works better, not worse: "Physically typing out that $40 forces you to acknowledge the loss. That friction is exactly what you need." The friction is the point.
The One-Number Lite sheet — a free spreadsheet with exactly this method built in. One tab. You only ever touch the yellow cells; everything else calculates itself. Opens directly in Excel, or import it into Google Sheets — same file works in both.
If your money is simple — one paycheck, no card to juggle, no one else spending from the same account — the Lite sheet is genuinely enough. Download it and you're done reading.
I also built an offline version — no account, no install, nothing sent anywhere. It runs entirely in your browser and saves its data as a small file on your own device. Below is the actual tool, live, with every feature turned on. Click "Load example" inside it to see it populated, or just start typing your own numbers:
Everything you just tried — variable income, the credit card handling, the partner/couples view — works exactly like this in the version you can keep. Nothing here was locked or simplified for the demo.
But there are three situations that break almost every simple budget sheet, the free Lite one included: a paycheck that changes every month, a credit card that gets counted twice, and two people spending from one budget. Those are exactly the three things above that the free sheet doesn't handle — and the paid versions do.
Here's what's in it, and what it costs →