Construction Job Costing01

Job costing construction contractors can act on while the job is still open.

We encode your cost rules into the systems you already run, so the WIP tells the truth before the job closes, not after.

  • AI implementation services
  • Committed vs. actual, continuously
  • Your cost rules, encoded
  • Exception-only review

Official services partner of the platforms defining AI

NVIDIAAnthropic
Peter Enestrom, founder of Zaigo

Every engagement is led personally by Peter Enestrom and the Zaigo AI & engineering team

YaleColumbia UniversityMicrosoft
The broken Friday01

The month-end WIP tells you what you already lost.

From controllers and owners we have sat with: GCs, subs, and equipment-heavy field-services contractors between $10M and $100M, on a construction accounting suite already — and still drowning in month-end variance.

  • Receipts that never make it to the job

    Receipt scanning with job attribution is completely manual: receipts sit in truck cabs until month-end, then get keyed to whatever job someone remembers. High-value jobs absorb the guesswork.

  • Owned vs. rented, told apart by a code nobody trusts

    The only flag is a resource code an accountant types into the job planning lines; filtering on it means trusting every keystroke. Rental cost bleeds into owned-equipment rates.

  • The job site and the equipment live in different systems

    The job site address lives in a different system than the equipment — cost and location never visible together. Machines move between jobs; costs move when someone remembers.

  • The estimate-to-actual handoff, fragile at the worst time

    Estimating just moved from sales to engineering and the team is getting its sea legs, so every downstream variance inherits the fragile handoff.

  • Field approvals that never reach the forecast

    Change orders get a verbal yes in the field and never enter the projection. Unlogged approvals corrupt the job-cost forecast — discovered at month-end, with the job already over.

What manual costs02

Margin fade surfaces at the month-end WIP after the window to act has closed.

The scale of the contractor organizations this manual work is holding together. Your numbers will differ — the variance audit of one job puts figures on yours before anything gets built.

~1,000Tracked assets at a field-services contractor capturing job expenses by hand
~800Fleet units at an equipment-heavy contractor, owned vs. rented distinguished by a typed code
$100M+Specialty contractor whose estimate-to-actual handoff just moved teams

From anonymized engagements — field services, equipment-heavy and specialty contracting

How it works03

We encode your cost rules.

No new system for your team to learn. The rules your best job-cost person carries in their head become the checks the ledger runs under.

  1. 01

    Audit the variance on one job

    We map one job: where actuals diverged from the estimate, and when anyone could have known. The gap between divergence and discovery is what we close first.

    First job
  2. 02

    Encode the rules

    Cost-code map, committed-cost capture at the PO and field ticket, owned-vs-rented flags, receipt-to-job attribution — run inside your accounting suite. What breaks a rule lands in an exception queue.

    The rule set
  3. 03

    Review exceptions only

    Your team sees only the jobs whose rules tripped, while there is still time to act. The WIP tells the truth before the job closes.

    Every open job
Not another tool

The software holds the ledger. It doesn’t hold your rules.

Construction accounting suites — the Sage 300 CRE, Foundation, Viewpoint, and Procore financials class — hold the job-cost ledger. They don’t hold your rules: cost-code discipline, committed-vs-actual tracking, owned-vs-rented flags, receipt-to-job attribution, the estimate-to-actual handoff.

Your jobs run on exceptions: the cost code this owner bills differently, the machine crossing three jobs, the receipt arriving after the pay app. We encode your rules into the systems you already run; our AI reads every receipt and field ticket against them.

In production
Before closeWhen the WIP tells the truth — variance surfaces while the job is still open
Exception queueWhat month-end becomes — only the jobs whose rules tripped reach a human
Every receiptAttributed to a job at capture, not reconstructed at month-end
Peter Enestrom, founder of Zaigo
Who builds it

Led by Peter Enestrom.

Founder — leads AI & Engineering

Pete Enestrom

Every engagement is led personally by Pete, working with the Zaigo AI & engineering team from the two-week audit through the production handover. The person who scopes the work is the person who builds it.

Education
Yale & ColumbiaGraduate
Background
Microsoft & IntelFormer
Experience
Exited FounderVenture-Backed

Background

Questions04

Asked by controllers and owners.

The straight answers, before you book anything.

Job costing in construction is the practice of assigning every dollar of cost — labor, materials, equipment, subcontractors, overhead — to a specific job and cost code, so actual spend can be compared against the estimate while the job is still open. It is how a contractor knows whether a job is making money before it closes, rather than after.

A cost code is a label that assigns each dollar of spend to a category of work on a job, such as a phase, a trade, or a material class. Consistent cost codes are what make actuals comparable to the estimate; when codes are applied inconsistently, the variance report stops meaning anything.

Actual costs are invoices and payroll already posted to the job. Committed costs are money you have agreed to spend but have not yet been billed for — open purchase orders, signed subcontracts, field tickets in progress. A job can look healthy on actuals and already be over budget on commitments, which is why committed-cost tracking matters more than the ledger alone.

A WIP report summarizes every open job: the estimate, costs to date, percent complete, billings to date, and the projected final cost. It is where margin fade first becomes visible, which is why it has to tell the truth while the job is still open — a WIP that only reconciles after close is a history, not a control.

Usually attribution, not arithmetic: costs posted to the wrong job or code, commitments that never entered the forecast, receipts keyed weeks late, field approvals missing from the projection. The estimate and the ledger follow different rules; encoding one shared rule set is what closes the gap.

Start with one workflow.

Tell us where your team loses hours. We will come back with a straight answer on whether AI can help, what it would take, and what it would pay.