Variations on a fixed-price job are where margin goes to die.
Document every change in writing — voice memo now, signed-off line item later. Stay compliant with the NZ Building Act 2004, and stop arguing at invoice time. Tydra turns the conversation on site into the paper trail the contract requires.
Works with or without Xero. Made in New Zealand.
The variations a builder actually captures.
Tradies don’t dictate like accountants. Here’s how Tydra handles the way you’d actually describe these on site.
Customer asked to add gib stopping in the laundry on top of what we quoted, that's another two hours probably.
Moved the laundry door framing 200 left because of the new layout, two and a half hours, framing timber probably eighty bucks.
Owner wants a niche in the bathroom shower instead of a tile-over surround, half a day extra including the waterproofing.
Found rotten dwangs behind the old vanity when we pulled it off, replaced them, an hour and forty bucks of pine.
Why Tydra fits builders & renovators.
Fixed-price jobs that leak margin.
Every undocumented “oh while you're at it” chips at the fixed-price line. A handful of $200 changes a week and you've eaten the entire project's contingency by month two. Tydra captures them in the moment so they don't get written off.
NZ Building Act 2004 compliance.
Residential work of $30,000 or more legally requires a written contract that covers variations. The PDFs Tydra generates — with description, who agreed, when, costs — are exactly the kind of “in writing” record that supports compliance.
Stop arguing at invoice time.
When the customer queries a line three months later, you have the original voice memo, transcript, and a timestamped agreement. The conversation is over before it starts.
Three taps. One variation. No paper.
Tap and talk
Open the app, hit record. Talk like you're telling your bookkeeper. Stop.
AI structures it
Transcription + structuring into a line item: description, agreement, labour, parts, total.
Ready at invoice time
Push to Xero as a draft invoice, or generate a customer-facing PDF. You decide what gets billed.
One captured variation pays for the month.
From NZ$29/month. 14-day free trial. 30-day money-back guarantee.
See full pricingCapture this week’s “while you’re at it” — in ten seconds, on site.
Built for builders & renovators who get hands-dirty on a job site every day.
Start 14-day free trial