Stage of completion, retentions held both ways, applications that don't match certifications, and a CIS regime that penalises administrative slips. A contractor with strong contracts can still show a distorted profit for two years running purely because WIP is being carried wrong.
Cost to complete. Everything about a contractor's reported profit rests on that estimate, and it's the number most often left stale.
Yes, monthly, including verification.
Contract-level P&L is standard.
Both work — the reverse charge and retention position simply run the other way.
We'll show you what a proper WIP and cost-to-complete review looks like.