Choose a job reference everyone can use
The same reference should follow the estimate, customer approval, parts purchase, technician time and invoice. We agree which direct costs belong to a job and how shared expenses will be presented. A small set of consistent categories is easier to maintain than a detailed structure that staff cannot apply reliably.
Separate approved scope from extra work
Added tasks, replacement parts and extra travel need an approval trail. We track costs awaiting customer authorization and work completed but not yet billed. This lets the owner distinguish a pricing issue from a missing invoice or an operational problem, and prevents unapproved extras from becoming assumed revenue in a forecast.
Illustrative example: regional service travel
A Winnipeg supplier quotes a regional service visit at $7,800. Illustrative direct costs are $2,900 labour, $1,650 parts, $620 travel and $330 freight. The $2,300 remaining is a contribution before shared overhead and other expenses. Omitting travel and freight would overstate that contribution by $950.
Review completed jobs before reusing the quote
The close checks supplier bills, employee claims, customer credits and any outstanding costs. We can compare the estimate with the final result and document why it changed. Tax treatment and contractor status remain separate reviews; a shared job number does not determine which province’s rules apply or whether a worker is an independent business.
Questions about this work
Can we start with simple job categories?
Yes. A consistent job reference and a few meaningful cost categories often provide a useful starting point.
Are the resulting job margins net profit?
Only if all relevant costs are included. We label direct contribution and any shared-overhead allocation clearly.
Put this into practice
Sources and current guidance
A practical next step
Bring the records you have.
We can identify missing information, agree on the scope and organize the next bookkeeping step.
Request a bookkeeping review