Draft.This article hasn’t had its final edit yet, so treat anything specific in it as provisional.
Every estimator has a spreadsheet they're proud of. Years of refinement, rates that reflect hard-won experience, formulas tuned to how your trade actually prices work. Excel is flexible, familiar and effectively free — which is why most subcontracting businesses in Australia still quote with it.
The problem isn't building an estimate in Excel. The problem is everything that happens after you win.
The five failure points
1. The estimate and the takeoff drift apart
Quantities live in one tab (or one file), pricing in another. Revise the takeoff after a drawing change and the cost sheet doesn't always follow. Two versions of the truth, and the one you submitted might be the wrong one.
2. Version control by filename
Quote-FINAL-v7-REVISED-USE-THIS-ONE.xlsx is funny until a variation dispute lands and
you need to prove exactly what was priced, when, and against which drawings. A paper
trail assembled from file dates and memory is not a paper trail.
3. Winning the job means re-typing the job
The estimate was cost-coded beautifully — then the job gets tracked in a different spreadsheet, or someone re-keys the numbers into accounting software. Every re-type is a chance for the budget to stop matching the quote. Usually it takes that chance.
4. Committed costs are invisible
Excel can tell you what you've paid. It's much worse at what you've committed — the purchase orders raised and subbie packages let that haven't hit the accounts yet. By the time the invoices land, the money was spent weeks ago and the forecast is history.
5. One person holds the whole thing together
The spreadsheet works because one person knows how it works. When they're on leave, on site, or off to a competitor, the business is guessing. And a shared drive full of formulas has no concept of who's allowed to see margin.
What "graduating" from Excel should mean
Moving off Excel shouldn't mean abandoning what made your spreadsheet good — your rates, your cost codes, your way of pricing. It should mean keeping that logic and connecting it: takeoff linked to the cost sheet revision, estimate seeding the live budget the day you win, purchase orders capturing committed cost the moment you order, and a forecast final cost per cost code that updates while there's still time to act.
That's how Subino is built — estimating and job-cost management with the same cost-coded backbone from first takeoff to final claim. And you don't start from an empty system: your jobs, budgets, contacts, purchase orders and bills import straight from a spreadsheet, so day one already has the work you've got on the books.
Book a demo — bring your spreadsheet, and we'll show you what it looks like connected.