Start with what changed on site
Ask which materials arrived, which staff worked, which rentals continued and which customer instructions changed. Connect each item to the job reference and retain the document that explains it. A receipt without a project code often creates another question later.
The useful distinction is between recorded expenses, open commitments and estimated costs to finish. A purchase order that later becomes an invoice should move through the schedule without being counted twice.
Illustrative example: a refit loses part of its cushion
A Surrey contractor has $64,000 of approved revenue and forecasts $49,000 of direct costs. That leaves $15,000 of direct contribution before overhead, financing and tax. During the week, a revised labour estimate adds $2,200 and a supplier confirms a $700 credit.
The revised direct-cost forecast is $50,500, leaving $13,500 contribution. The change is a $1,500 reduction, not a $2,200 reduction, because the supplier credit belongs to the same job. Keeping the adjustment references makes the comparison explainable.
Use five questions at the weekly review
Confirm whether every receipt has a job; whether approved timesheets have reached payroll; whether supplier credits are expected; whether customer variations are accepted; and whether remaining work estimates have changed. Give every missing item a responsible person and a next action date.
The manager should identify costs incurred for proposed work separately. A customer request is not automatically an approved increase in contract value. The record should help the manager obtain the required decision rather than assume the result.
Tie the operating schedule back to the books
At month end, reconcile actual direct costs to the ledger and explain late bills, shared allocations and corrections. Date the forecast and retain significant earlier versions so management can see why the expected outcome moved.
A preliminary contribution calculation is useful only with clear definitions. It does not certify progress, establish lien rights or decide when a disputed amount must be paid. Those questions require the appropriate documents and advisers. The bookkeeping routine provides the financial evidence for the conversation.
Put this into practice
Sources and current guidance
A practical next step
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