Construction job costing done at month-end tells you a job lost money after the framing is finished, the drywall is hung and the budget lines that went over can no longer be changed. The version that protects margin is weekly and approximate: every Monday, compare what each cost code has spent against how far along that work actually is, using hours, delivery tickets and signed sub commitments instead of waiting for paid invoices. It will be off by a few hundred dollars. It will also be early enough to act on.

Month-end numbers describe a job you can no longer fix

The accounting close is built to be correct, not fast. Follow one lumber overrun through a normal close:

  1. Week 1: the beam schedule changes and the framing crew needs an extra load of LVLs. The yard delivers it on a ticket.
  2. Week 3: the supplier's monthly statement arrives with the invoice on it.
  3. Week 4: someone in the office codes the invoice, enters it and it waits for approval.
  4. Week 5: the month closes. Reconciliation runs into the following weeks.
  5. Week 6 or 7: the job cost report shows framing over budget.

By week seven the framing crew is on another job. The overrun is real, it is recorded accurately and nobody can do anything about it except absorb it. The report also arrives too late to say whether the cause — a beam change nobody priced — is about to repeat on the second floor.

Month-end costing still matters. It is how you learn true margin, file taxes and see which kinds of jobs make money. It is a post-mortem. The mistake is treating it as the early-warning system.

What a weekly cost check looks at

The weekly check uses the same cost codes and the same budget as the estimate. What changes is the source of the actual-cost number. Instead of waiting for posted bills, it counts cost at the moment it becomes certain:

  • Labor — hours from the week's time entries multiplied by a loaded rate per trade or per person. Hours are known daily. Payroll posts later.
  • Materials — delivery tickets and receipts, entered at ticket value. The invoice will differ slightly. For this purpose that difference does not matter.
  • Subcontractors — signed contract value plus approved change orders, against the share of work the sub has completed. A sub 60% through a $48,000 contract has used about $28,800 of budget whether or not they have billed.
  • Equipment and rentals — the start date on the rental agreement and its daily or weekly rate, accrued until it goes back.
  • Change work in progress — anything done this week that sits outside the original scope, logged separately, priced or not.

Add those together per cost code and you have cost to date. It is an estimate. It is an estimate built from information the office already holds, on the day it happens, instead of five weeks later.

Approximate beats exact while the decision is still open

Bookkeepers are trained to distrust approximate numbers, and in the books they are right to. The general ledger needs the invoice amount, not the ticket amount. But a weekly review answers a different question: is this line heading over, and is there still time to change the outcome? A number that is roughly right on Monday answers that. A number that is exactly right on the 15th of next month does not.

Keep the two systems separate. The weekly figure is a management estimate that gets replaced by real costs as they post. QuickBooks stays the book of record. Nobody files taxes off a delivery ticket.

Labor moves fastest

Labor is spent every day whether the work advances or not. A crew that loses half a week to rain, waits on an inspection or rebuilds a wall framed wrong still logs hours. If time entries land against the right cost code each day, labor cost to date is accurate to within a day. If paper timesheets come in Friday and get coded the next Wednesday, it is not.

Materials: count the ticket, not the invoice

Supplier invoices lag, get batched into statements and sometimes cover three jobs on one page. The delivery ticket is on site the same day as the material. Photographing it into the job and entering its total against a cost code takes a minute. That minute is the difference between seeing a second drywall order this week and seeing it after close.

The most expensive line on a weekly report is the one that looks like an overrun but is extra work nobody wrote up. The client asked for blocking for a wall-hung vanity, the crew did it and the hours landed in framing. The report says framing is over. The truth is you did billable work for free. A weekly check catches it while the client still remembers asking — which matters, because verbal change orders fail on memory and memory fades fast. Month-end catches it after it has faded.

Reading it: percent spent against percent complete

Cost to date alone means nothing. $30,000 spent on a $40,000 framing budget is fine if framing is 80% done and a problem if it is 50% done. The weekly review asks two things of every active cost code: what share of the budget is spent and what share of the work is complete. The second is a judgment from whoever walked the site, usually the super or PM, and it should be written down before the meeting, not guessed during it.

  • Spent below complete — framing 60% spent, 70% complete. On track or ahead. Note it and move on.
  • Spent close to complete — within a few points either way. Fine, but watch the trend. A gap that widens two weeks running is a signal even when each week looks small.
  • Spent ahead of complete — framing 75% spent, 50% complete. At the current burn the line finishes near $60,000 on a $40,000 budget. That needs a named cause by Friday.

The projection is the useful part. Cost to date divided by percent complete gives a rough cost at completion. It is crude — work is not linear and finish work often runs slower than the first pass — but crude and early beats precise and late. An over-budget line with five weeks left can still be managed. The same line with five days left is a write-off.

What to do when a line goes red

A red line is a question, not a verdict. Work it in order:

  1. Check the data. Hours coded to the wrong job or a ticket entered twice explain plenty of alarms. Fix the entry before fixing the job.
  2. Separate scope from performance. If the extra cost came from work outside the contract, it belongs on a change order, not in the overrun. Price it and send it. If the same kind of unwritten extra keeps showing up across jobs, the real problem is capturing scope as it changes, not cost control.
  3. If it is performance, find the cause. Rework, a crew short a person, a slow inspection or a material price that moved since the estimate each has a different fix.
  4. Re-forecast the line. Write down a new estimate to complete. If total job margin still holds because another line is running under, say so. If it does not, the owner hears about it this week.
  5. Feed it back to the estimate. If framing labor ran over on three of the last four jobs of this type, the rate in the library is wrong. Change it before the next bid goes out.

Where the software helps and where it does not

In BuilderSolve the budget is the estimate. Line items and cost codes carry straight from the bid into budget vs. actual tracking, so the weekly check compares against the numbers the client signed, not a re-keyed spreadsheet. Time entries and daily logs post against those cost codes as they are entered. The AI assistant drafts time entries and daily logs from what crews send in, and a person approves or rejects each one before it counts.

Posted costs come in from QuickBooks one way. BuilderSolve does not write back to QuickBooks and does not replace your accountant's close. The weekly estimate and the posted actuals sit side by side, and the job cost and budget reports show where they disagree.

What it does not do yet: purchase orders are in development and not shipped. If you track committed material cost through POs, that commitment has to live somewhere else for now — a contract register or a running list per job. We would rather tell you that than have you find out in week three.

If the gap is people, not software — nobody in the office has time to code tickets on Monday — the BuilderSolve finance team does that work: entering bills, coding costs to jobs and keeping change orders and QuickBooks current. It is priced against the project accountant or bookkeeper role it replaces, at roughly 60% less than hiring for it.

Start with three jobs and one hour a week

Do not convert every job at once. Pick the three active jobs with the most budget still unspent — the ones where an overrun found now has room to be fixed. Set up the habit before the system:

  • Time entries coded to cost codes daily, not weekly.
  • Delivery tickets photographed and entered the day they arrive.
  • Sub contract values and approved change orders listed against each sub's cost code.
  • A percent-complete figure per active cost code from the super every Friday.
  • A 30-minute Monday review: spent against complete, one line per active code, a written cause next to anything red.

Run it for four weeks. The first two will mostly turn up coding errors. By the third the numbers will be clean enough to argue with, and that is when construction job costing stops being a report about last month and starts being a decision about this week.

Common questions

what is construction job costing

Construction job costing is tracking what each job actually costs, by cost code, against the budget built from the estimate. It covers labor, materials, subcontractors, equipment and change work. Done monthly from posted invoices it measures final margin. Done weekly from hours, delivery tickets and signed commitments it warns you about overruns while the work is still underway and the outcome can still change.

how often should builders review job costs

Weekly for managing jobs, monthly for accounting. A weekly review uses approximate costs from time entries, delivery tickets and sub contract values to spot lines heading over budget. The monthly close uses posted invoices to confirm true margin. Relying only on the monthly figure means most overruns surface around six weeks after the money was spent, when the phase is already finished.

percent complete vs percent spent construction

Percent spent is the share of a cost code's budget already used. Percent complete is the share of that work actually finished, judged on site. Comparing them shows whether a line is on track. If framing is 75% spent and 50% complete, it projects to finish 50% over budget. Cost to date divided by percent complete gives a rough cost at completion.

can job costing software replace quickbooks

No, and it should not try to. QuickBooks stays the book of record for taxes, payroll and the monthly close. BuilderSolve reads QuickBooks one way and shows posted actuals next to the weekly estimate built from field data. It does not write back to QuickBooks. The two numbers serve different purposes: one is accurate, the other is early.

how to track committed costs on a construction job

List every signed subcontract and its approved change orders against the matching cost code, along with rental agreements and their rates. Count committed value by percent complete, not by what has been billed. In BuilderSolve, purchase orders are in development and not shipped, so material commitments currently need a separate register or running list per job until that feature is released.