22/05/2026
The job is done. The client is happy. You send the invoice.
Then the reply comes back.
"This is higher than I expected."
And just like that, a completed job becomes a negotiation you weren't prepared for.
It happens to almost every builder at some point. And in most cases, it's not because the client is being dishonest. It's because there's a genuine gap between what they remember agreeing to and what the invoice says.
They remember the original quote. They don't remember or didn't fully register every change, every variation, every extra that was agreed along the way.
If those changes were never documented, you have no way to prove them. And without proof, the dispute drags on, the relationship suffers, and you often end up absorbing costs you were completely entitled to charge.
The protection isn't complicated. It's documentation.
Every change agreed on site — logged at the time.
Every variation discussed on the phone — followed up in writing.
Every additional cost — recorded before the invoice, not reconstructed after.
When the final invoice goes out supported by a clear paper trail, there's nothing to dispute. The client can see exactly what changed, when it was agreed, and why the number is what it is.
ProntoCalc logs every variation and additional cost as it happens, so your invoice is always backed up, always explainable, and always defensible.
Protect yourself before it gets to that point. Not after.
