Free tool for employers
Construction rework cost calculator
Rework and snagging eat margin on fixed-price jobs. Use this calculator to estimate what repeat visits and wasted materials cost your crew each month, and why catching defects during installation is cheaper than at handover.
Number of people on the crew whose work is included in this estimate.
Include wages, employer costs, and on-costs, not day rate alone.
Total crew hours spent fixing defects, snagging, or redoing work.
Estimated percentage of materials wasted due to rework or incorrect installation.
Estimated rework cost
€1,747 / month
€20,966 per year
- Labour rework
- €1,120
- Material waste
- €627
- Construction rework often runs 2–5% of project value on commercial builds; residential and fit-out can be higher on fixed-price jobs.
- Catching defects during installation, not at handover, is the cheapest place to intervene.
- Visual verification at each task step reduces repeat visits and material scrap.
Illustrative estimate only. Adjust inputs to match your site. Smart Trady helps employers verify apprentice work against SOPs before sign-off.
See how Smart Trady reduces rework on site →Why rework costs more than the hours you log
Direct labour for snagging and repeat visits is only part of the picture. Material scrap, delayed handovers, and subcontractor callbacks compound the hit, especially when apprentices repeat the same mistake because verification happened too late or not at all.
Smart Trady gives site teams an AI Mentor that validates work against your Standard Operating Procedures before sign-off. Apprentices ask questions and submit photos from any phone browser; site managers get a timestamped audit trail. See Smart Trady for construction employers for pilot and enterprise rollout options.